This patch adds V4L2 HVA (Hardware Video Accelerator) video encoder
driver for STMicroelectronics SoC. It uses the V4L2 mem2mem framework.
This patch only contains the core parts of the driver:
- the V4L2 interface with the userland (hva-v4l2.c)
- the hardware services (hva-hw.c)
- the memory management utilities (hva-mem.c)
This patch doesn't include the support of specific codec (e.g. H.264)
video encoding: this support is part of subsequent patches.
Signed-off-by: Yannick Fertre <yannick.fertre@xxxxxx>
Signed-off-by: Jean-Christophe Trotin <jean-christophe.trotin@xxxxxx>
Acked-by: Peter Griffin <peter.griffin@xxxxxxxxxx>
---
drivers/media/platform/Kconfig | 15 +
drivers/media/platform/Makefile | 1 +
drivers/media/platform/sti/hva/Makefile | 2 +
drivers/media/platform/sti/hva/hva-hw.c | 538 ++++++++++++
drivers/media/platform/sti/hva/hva-hw.h | 42 +
drivers/media/platform/sti/hva/hva-mem.c | 59 ++
drivers/media/platform/sti/hva/hva-mem.h | 34 +
drivers/media/platform/sti/hva/hva-v4l2.c | 1308 +++++++++++++++++++++++++++++
drivers/media/platform/sti/hva/hva.h | 290 +++++++
9 files changed, 2289 insertions(+)
create mode 100644 drivers/media/platform/sti/hva/Makefile
create mode 100644 drivers/media/platform/sti/hva/hva-hw.c
create mode 100644 drivers/media/platform/sti/hva/hva-hw.h
create mode 100644 drivers/media/platform/sti/hva/hva-mem.c
create mode 100644 drivers/media/platform/sti/hva/hva-mem.h
create mode 100644 drivers/media/platform/sti/hva/hva-v4l2.c
create mode 100644 drivers/media/platform/sti/hva/hva.h
diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
index f25344b..c42123f 100644
--- a/drivers/media/platform/Kconfig
+++ b/drivers/media/platform/Kconfig
@@ -257,6 +257,21 @@ config VIDEO_STI_BDISP
help
This v4l2 mem2mem driver is a 2D blitter for STMicroelectronics SoC.
+config VIDEO_STI_HVA
+ tristate "STMicroelectronics HVA multi-format video encoder V4L2 driver"
+ depends on VIDEO_DEV && VIDEO_V4L2
+ depends on HAS_DMA
+ depends on ARCH_STI || COMPILE_TEST
+ select VIDEOBUF2_DMA_CONTIG
+ select V4L2_MEM2MEM_DEV
+ help
+ This V4L2 driver enables HVA (Hardware Video Accelerator) multi-format
+ video encoder of STMicroelectronics SoC, allowing hardware encoding of
+ raw uncompressed formats in various compressed video bitstreams format.
+
+ To compile this driver as a module, choose M here:
+ the module will be called st-hva.
+
config VIDEO_SH_VEU
tristate "SuperH VEU mem2mem video processing driver"
depends on VIDEO_DEV && VIDEO_V4L2 && HAS_DMA
diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile
index 21771c1..fa31ec1 100644
--- a/drivers/media/platform/Makefile
+++ b/drivers/media/platform/Makefile
@@ -36,6 +36,7 @@ obj-$(CONFIG_VIDEO_SAMSUNG_S5P_G2D) += s5p-g2d/
obj-$(CONFIG_VIDEO_SAMSUNG_EXYNOS_GSC) += exynos-gsc/
obj-$(CONFIG_VIDEO_STI_BDISP) += sti/bdisp/
+obj-$(CONFIG_VIDEO_STI_HVA) += sti/hva/
obj-$(CONFIG_DVB_C8SECTPFE) += sti/c8sectpfe/
obj-$(CONFIG_BLACKFIN) += blackfin/
diff --git a/drivers/media/platform/sti/hva/Makefile b/drivers/media/platform/sti/hva/Makefile
new file mode 100644
index 0000000..633ee40
--- /dev/null
+++ b/drivers/media/platform/sti/hva/Makefile
@@ -0,0 +1,2 @@
+obj-$(CONFIG_VIDEO_STI_HVA) := st-hva.o
+st-hva-y := hva-v4l2.o hva-hw.o hva-mem.o
diff --git a/drivers/media/platform/sti/hva/hva-hw.c b/drivers/media/platform/sti/hva/hva-hw.c
new file mode 100644
index 0000000..8d9ad1c
--- /dev/null
+++ b/drivers/media/platform/sti/hva/hva-hw.c
@@ -0,0 +1,538 @@
+/*
+ * Copyright (C) STMicroelectronics SA 2015
+ * Authors: Yannick Fertre <yannick.fertre@xxxxxx>
+ * Hugues Fruchet <hugues.fruchet@xxxxxx>
+ * License terms: GNU General Public License (GPL), version 2
+ */
+
+#include <linux/clk.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+#include "hva.h"
+#include "hva-hw.h"
+
+/* HVA register offsets */
+#define HVA_HIF_REG_RST 0x0100U
+#define HVA_HIF_REG_RST_ACK 0x0104U
+#define HVA_HIF_REG_MIF_CFG 0x0108U
+#define HVA_HIF_REG_HEC_MIF_CFG 0x010CU
+#define HVA_HIF_REG_CFL 0x0110U
+#define HVA_HIF_FIFO_CMD 0x0114U
+#define HVA_HIF_FIFO_STS 0x0118U
+#define HVA_HIF_REG_SFL 0x011CU
+#define HVA_HIF_REG_IT_ACK 0x0120U
+#define HVA_HIF_REG_ERR_IT_ACK 0x0124U
+#define HVA_HIF_REG_LMI_ERR 0x0128U
+#define HVA_HIF_REG_EMI_ERR 0x012CU
+#define HVA_HIF_REG_HEC_MIF_ERR 0x0130U
+#define HVA_HIF_REG_HEC_STS 0x0134U
+#define HVA_HIF_REG_HVC_STS 0x0138U
+#define HVA_HIF_REG_HJE_STS 0x013CU
+#define HVA_HIF_REG_CNT 0x0140U
+#define HVA_HIF_REG_HEC_CHKSYN_DIS 0x0144U
+#define HVA_HIF_REG_CLK_GATING 0x0148U
+#define HVA_HIF_REG_VERSION 0x014CU
+#define HVA_HIF_REG_BSM 0x0150U
+
+/* define value for version id register (HVA_HIF_REG_VERSION) */
+#define VERSION_ID_MASK 0x0000FFFF
+
+/* define values for BSM register (HVA_HIF_REG_BSM) */
+#define BSM_CFG_VAL1 0x0003F000
+#define BSM_CFG_VAL2 0x003F0000
+
+/* define values for memory interface register (HVA_HIF_REG_MIF_CFG) */
+#define MIF_CFG_VAL1 0x04460446
+#define MIF_CFG_VAL2 0x04460806
+#define MIF_CFG_VAL3 0x00000000
+
+/* define value for HEC memory interface register (HVA_HIF_REG_MIF_CFG) */
+#define HEC_MIF_CFG_VAL 0x000000C4
+
+/* Bits definition for clock gating register (HVA_HIF_REG_CLK_GATING) */
+#define CLK_GATING_HVC BIT(0)
+#define CLK_GATING_HEC BIT(1)
+#define CLK_GATING_HJE BIT(2)
+
+/* fix hva clock rate */
+#define CLK_RATE 300000000
+
+/* fix delay for pmruntime */
+#define AUTOSUSPEND_DELAY_MS 3
+
+/**
+ * hw encode error values
+ * NO_ERROR: Success, Task OK
+ * H264_BITSTREAM_OVERSIZE: VECH264 Bitstream size > bitstream buffer
+ * H264_FRAME_SKIPPED: VECH264 Frame skipped (refers to CPB Buffer Size)
+ * H264_SLICE_LIMIT_SIZE: VECH264 MB > slice limit size
+ * H264_MAX_SLICE_NUMBER: VECH264 max slice number reached
+ * H264_SLICE_READY: VECH264 Slice ready
+ * TASK_LIST_FULL: HVA/FPC task list full
+ (discard latest transform command)
+ * UNKNOWN_COMMAND: Transform command not known by HVA/FPC
+ * WRONG_CODEC_OR_RESOLUTION: Wrong Codec or Resolution Selection
+ * NO_INT_COMPLETION: Time-out on interrupt completion
+ * LMI_ERR: Local Memory Interface Error
+ * EMI_ERR: External Memory Interface Error
+ * HECMI_ERR: HEC Memory Interface Error
+ */
+enum hva_hw_error {
+ NO_ERROR = 0x0,
+ H264_BITSTREAM_OVERSIZE = 0x2,
+ H264_FRAME_SKIPPED = 0x4,
+ H264_SLICE_LIMIT_SIZE = 0x5,
+ H264_MAX_SLICE_NUMBER = 0x7,
+ H264_SLICE_READY = 0x8,
+ TASK_LIST_FULL = 0xF0,
+ UNKNOWN_COMMAND = 0xF1,
+ WRONG_CODEC_OR_RESOLUTION = 0xF4,
+ NO_INT_COMPLETION = 0x100,
+ LMI_ERR = 0x101,
+ EMI_ERR = 0x102,
+ HECMI_ERR = 0x103,
+};
+
+static irqreturn_t hva_hw_its_interrupt(int irq, void *data)
+{
+ struct hva_dev *hva = data;
+
+ /* read status registers */
+ hva->sts_reg = readl_relaxed(hva->regs + HVA_HIF_FIFO_STS);
+ hva->sfl_reg = readl_relaxed(hva->regs + HVA_HIF_REG_SFL);
+
+ /* acknowledge interruption */
+ writel_relaxed(0x1, hva->regs + HVA_HIF_REG_IT_ACK);
+
+ return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t hva_hw_its_irq_thread(int irq, void *arg)
+{
+ struct hva_dev *hva = arg;
+ struct device *dev = hva_to_dev(hva);
+ u32 status = hva->sts_reg & 0xFF;
+ u8 ctx_id = 0;
+ struct hva_ctx *ctx = NULL;
+
+ dev_dbg(dev, "%s %s: status: 0x%02x fifo level: 0x%02x\n",
+ HVA_PREFIX, __func__, hva->sts_reg & 0xFF, hva->sfl_reg & 0xF);
+
+ /*
+ * status: task_id[31:16] client_id[15:8] status[7:0]
+ * the context identifier is retrieved from the client identifier
+ */
+ ctx_id = (hva->sts_reg & 0xFF00) >> 8;
+ if (ctx_id >= HVA_MAX_INSTANCES) {
+ dev_err(dev, "%s %s: bad context identifier: %d\n",
+ ctx->name, __func__, ctx_id);
+ ctx->hw_err = true;
+ goto out;
+ }
+
+ ctx = hva->instances[ctx_id];
+ if (!ctx)
+ goto out;
+
+ switch (status) {
+ case NO_ERROR:
+ dev_dbg(dev, "%s %s: no error\n",
+ ctx->name, __func__);
+ ctx->hw_err = false;
+ break;
+ case H264_SLICE_READY:
+ dev_dbg(dev, "%s %s: h264 slice ready\n",
+ ctx->name, __func__);
+ ctx->hw_err = false;
+ break;
+ case H264_FRAME_SKIPPED:
+ dev_dbg(dev, "%s %s: h264 frame skipped\n",
+ ctx->name, __func__);
+ ctx->hw_err = false;
+ break;
+ case H264_BITSTREAM_OVERSIZE:
+ dev_err(dev, "%s %s:h264 bitstream oversize\n",
+ ctx->name, __func__);
+ ctx->hw_err = true;
+ break;
+ case H264_SLICE_LIMIT_SIZE:
+ dev_err(dev, "%s %s: h264 slice limit size is reached\n",
+ ctx->name, __func__);
+ ctx->hw_err = true;
+ break;
+ case H264_MAX_SLICE_NUMBER:
+ dev_err(dev, "%s %s: h264 max slice number is reached\n",
+ ctx->name, __func__);
+ ctx->hw_err = true;
+ break;
+ case TASK_LIST_FULL:
+ dev_err(dev, "%s %s:task list full\n",
+ ctx->name, __func__);
+ ctx->hw_err = true;
+ break;
+ case UNKNOWN_COMMAND:
+ dev_err(dev, "%s %s: command not known\n",
+ ctx->name, __func__);
+ ctx->hw_err = true;
+ break;
+ case WRONG_CODEC_OR_RESOLUTION:
+ dev_err(dev, "%s %s: wrong codec or resolution\n",
+ ctx->name, __func__);
+ ctx->hw_err = true;
+ break;
+ default:
+ dev_err(dev, "%s %s: status not recognized\n",
+ ctx->name, __func__);
+ ctx->hw_err = true;
+ break;
+ }
+out:
+ complete(&hva->interrupt);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t hva_hw_err_interrupt(int irq, void *data)
+{
+ struct hva_dev *hva = data;
+
+ /* read status registers */
+ hva->sts_reg = readl_relaxed(hva->regs + HVA_HIF_FIFO_STS);
+ hva->sfl_reg = readl_relaxed(hva->regs + HVA_HIF_REG_SFL);
+
+ /* read error registers */
+ hva->lmi_err_reg = readl_relaxed(hva->regs + HVA_HIF_REG_LMI_ERR);
+ hva->emi_err_reg = readl_relaxed(hva->regs + HVA_HIF_REG_EMI_ERR);
+ hva->hec_mif_err_reg = readl_relaxed(hva->regs +
+ HVA_HIF_REG_HEC_MIF_ERR);
+
+ /* acknowledge interruption */
+ writel_relaxed(0x1, hva->regs + HVA_HIF_REG_IT_ACK);
+
+ return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t hva_hw_err_irq_thread(int irq, void *arg)
+{
+ struct hva_dev *hva = arg;
+ struct device *dev = hva_to_dev(hva);
+ u8 ctx_id = 0;
+ struct hva_ctx *ctx;
+
+ dev_dbg(dev, "%s status: 0x%02x fifo level: 0x%02x\n",
+ HVA_PREFIX, hva->sts_reg & 0xFF, hva->sfl_reg & 0xF);
+
+ /*
+ * status: task_id[31:16] client_id[15:8] status[7:0]
+ * the context identifier is retrieved from the client identifier
+ */
+ ctx_id = (hva->sts_reg & 0xFF00) >> 8;
+ if (ctx_id >= HVA_MAX_INSTANCES) {
+ dev_err(dev, "%s bad context identifier: %d\n", HVA_PREFIX,
+ ctx_id);
+ goto out;
+ }
+
+ ctx = hva->instances[ctx_id];
+ if (!ctx)
+ goto out;
+
+ if (hva->lmi_err_reg) {
+ dev_err(dev, "%s local memory interface error: 0x%08x\n",
+ ctx->name, hva->lmi_err_reg);
+ ctx->hw_err = true;
+ }
+
+ if (hva->lmi_err_reg) {
+ dev_err(dev, "%s external memory interface error: 0x%08x\n",
+ ctx->name, hva->emi_err_reg);
+ ctx->hw_err = true;
+ }
+
+ if (hva->hec_mif_err_reg) {
+ dev_err(dev, "%s hec memory interface error: 0x%08x\n",
+ ctx->name, hva->hec_mif_err_reg);
+ ctx->hw_err = true;
+ }
+out:
+ complete(&hva->interrupt);
+
+ return IRQ_HANDLED;
+}
+
+static unsigned long int hva_hw_get_ip_version(struct hva_dev *hva)
+{
+ struct device *dev = hva_to_dev(hva);
+ unsigned long int version;
+
+ if (pm_runtime_get_sync(dev) < 0) {
+ dev_err(dev, "%s failed to get pm_runtime\n", HVA_PREFIX);
+ mutex_unlock(&hva->protect_mutex);
+ return -EFAULT;
+ }
+
+ version = readl_relaxed(hva->regs + HVA_HIF_REG_VERSION) &
+ VERSION_ID_MASK;
+
+ pm_runtime_put_autosuspend(dev);
+
+ switch (version) {
+ case HVA_VERSION_V400:
+ dev_dbg(dev, "%s IP hardware version 0x%lx\n",
+ HVA_PREFIX, version);
+ break;
+ default:
+ dev_err(dev, "%s unknown IP hardware version 0x%lx\n",
+ HVA_PREFIX, version);
+ version = HVA_VERSION_UNKNOWN;
+ break;
+ }
+
+ return version;
+}
+
+int hva_hw_probe(struct platform_device *pdev, struct hva_dev *hva)
+{
+ struct device *dev = &pdev->dev;
+ struct resource *regs;
+ struct resource *esram;
+ int ret;
+
+ WARN_ON(!hva);
+
+ /* get memory for registers */
+ regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ hva->regs = devm_ioremap_resource(dev, regs);
+ if (IS_ERR_OR_NULL(hva->regs)) {
+ dev_err(dev, "%s failed to get regs\n", HVA_PREFIX);
+ return PTR_ERR(hva->regs);
+ }
+
+ /* get memory for esram */
+ esram = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (IS_ERR_OR_NULL(esram)) {
+ dev_err(dev, "%s failed to get esram\n", HVA_PREFIX);
+ return PTR_ERR(esram);
+ }
+ hva->esram_addr = esram->start;
+ hva->esram_size = resource_size(esram);
+
+ dev_info(dev, "%s esram reserved for address: 0x%x size:%d\n",
+ HVA_PREFIX, hva->esram_addr, hva->esram_size);
+
+ /* get clock resource */
+ hva->clk = devm_clk_get(dev, "clk_hva");
+ if (IS_ERR(hva->clk)) {
+ dev_err(dev, "%s failed to get clock\n", HVA_PREFIX);
+ return PTR_ERR(hva->clk);
+ }
+
+ ret = clk_prepare(hva->clk);
+ if (ret < 0) {
+ dev_err(dev, "%s failed to prepare clock\n", HVA_PREFIX);
+ hva->clk = ERR_PTR(-EINVAL);
+ return ret;
+ }
+
+ /* get status interruption resource */
+ ret = platform_get_irq(pdev, 0);
+ if (ret < 0) {
+ dev_err(dev, "%s failed to get status IRQ\n", HVA_PREFIX);
+ goto err_clk;
+ }
+ hva->irq_its = ret;
+
+ ret = devm_request_threaded_irq(dev, hva->irq_its, hva_hw_its_interrupt,
+ hva_hw_its_irq_thread,
+ IRQF_ONESHOT,
+ "hva_its_irq", hva);
+ if (ret) {
+ dev_err(dev, "%s failed to install status IRQ 0x%x\n",
+ HVA_PREFIX, hva->irq_its);
+ goto err_clk;
+ }
+ disable_irq(hva->irq_its);
+
+ /* get error interruption resource */
+ ret = platform_get_irq(pdev, 1);
+ if (ret < 0) {
+ dev_err(dev, "%s failed to get error IRQ\n", HVA_PREFIX);
+ goto err_clk;
+ }
+ hva->irq_err = ret;
+
+ ret = devm_request_threaded_irq(dev, hva->irq_err, hva_hw_err_interrupt,
+ hva_hw_err_irq_thread,
+ IRQF_ONESHOT,
+ "hva_err_irq", hva);
+ if (ret) {
+ dev_err(dev, "%s failed to install error IRQ 0x%x\n",
+ HVA_PREFIX, hva->irq_err);
+ goto err_clk;
+ }
+ disable_irq(hva->irq_err);
+
+ /* initialise protection mutex */
+ mutex_init(&hva->protect_mutex);
+
+ /* initialise completion signal */
+ init_completion(&hva->interrupt);
+
+ /* initialise runtime power management */
+ pm_runtime_set_autosuspend_delay(dev, AUTOSUSPEND_DELAY_MS);
+ pm_runtime_use_autosuspend(dev);
+ pm_runtime_set_suspended(dev);
+ pm_runtime_enable(dev);
+
+ ret = pm_runtime_get_sync(dev);
+ if (ret < 0) {
+ dev_err(dev, "%s failed to set PM\n", HVA_PREFIX);
+ goto err_clk;
+ }
+
+ /* check IP hardware version */
+ hva->ip_version = hva_hw_get_ip_version(hva);
+
+ if (hva->ip_version == HVA_VERSION_UNKNOWN) {
+ ret = -EINVAL;
+ goto err_pm;
+ }
+
+ dev_info(dev, "%s found hva device (version 0x%lx)\n", HVA_PREFIX,
+ hva->ip_version);
+
+ return 0;
+
+err_pm:
+ pm_runtime_put(dev);
+err_clk:
+ if (hva->clk)
+ clk_unprepare(hva->clk);
+
+ return ret;
+}
+
+void hva_hw_remove(struct hva_dev *hva)
+{
+ struct device *dev = hva_to_dev(hva);
+
+ disable_irq(hva->irq_its);
+ disable_irq(hva->irq_err);
+
+ pm_runtime_put_autosuspend(dev);
+ pm_runtime_disable(dev);
+}
+
+int hva_hw_runtime_suspend(struct device *dev)
+{
+ struct hva_dev *hva = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(hva->clk);
+
+ return 0;
+}
+
+int hva_hw_runtime_resume(struct device *dev)
+{
+ struct hva_dev *hva = dev_get_drvdata(dev);
+
+ if (clk_prepare_enable(hva->clk)) {
+ dev_err(hva->dev, "%s failed to prepare hva clk\n",
+ HVA_PREFIX);
+ return -EINVAL;
+ }
+
+ if (clk_set_rate(hva->clk, CLK_RATE)) {
+ dev_err(dev, "%s failed to set clock frequency\n",
+ HVA_PREFIX);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int hva_hw_execute_task(struct hva_ctx *ctx, enum hva_hw_cmd_type cmd,
+ struct hva_buffer *task)
+{
+ struct hva_dev *hva = ctx_to_hdev(ctx);
+ struct device *dev = hva_to_dev(hva);
+ u8 client_id = ctx->id;
+ int ret;
+ u32 reg = 0;
+
+ mutex_lock(&hva->protect_mutex);
+
+ /* enable irqs */
+ enable_irq(hva->irq_its);
+ enable_irq(hva->irq_err);
+
+ if (pm_runtime_get_sync(dev) < 0) {
+ dev_err(dev, "%s failed to get pm_runtime\n", ctx->name);
+ ret = -EFAULT;
+ goto out;
+ }
+
+ reg = readl_relaxed(hva->regs + HVA_HIF_REG_CLK_GATING);
+ switch (cmd) {
+ case H264_ENC:
+ reg |= CLK_GATING_HVC;
+ break;
+ default:
+ dev_dbg(dev, "%s unknown command 0x%x\n", ctx->name, cmd);
+ ret = -EFAULT;
+ goto out;
+ }
+ writel_relaxed(reg, hva->regs + HVA_HIF_REG_CLK_GATING);
+
+ dev_dbg(dev, "%s %s: write configuration registers\n", ctx->name,
+ __func__);
+
+ /* byte swap config */
+ writel_relaxed(BSM_CFG_VAL1, hva->regs + HVA_HIF_REG_BSM);
+
+ /* define Max Opcode Size and Max Message Size for LMI and EMI */
+ writel_relaxed(MIF_CFG_VAL3, hva->regs + HVA_HIF_REG_MIF_CFG);
+ writel_relaxed(HEC_MIF_CFG_VAL, hva->regs + HVA_HIF_REG_HEC_MIF_CFG);
+
+ /*
+ * command FIFO: task_id[31:16] client_id[15:8] command_type[7:0]
+ * the context identifier is provided as client identifier to the
+ * hardware, and is retrieved in the interrupt functions from the
+ * status register
+ */
+ dev_dbg(dev, "%s %s: send task (cmd: %d, task_desc: %pad)\n",
+ ctx->name, __func__, cmd + (client_id << 8), &task->paddr);
+ writel_relaxed(cmd + (client_id << 8), hva->regs + HVA_HIF_FIFO_CMD);
+ writel_relaxed(task->paddr, hva->regs + HVA_HIF_FIFO_CMD);
+
+ if (!wait_for_completion_timeout(&hva->interrupt,
+ msecs_to_jiffies(2000))) {
+ dev_err(dev, "%s %s: time out on completion\n", ctx->name,
+ __func__);
+ ret = -EFAULT;
+ goto out;
+ }
+
+ /* get encoding status */
+ ret = ctx->hw_err ? -EFAULT : 0;
+
+out:
+ disable_irq(hva->irq_its);
+ disable_irq(hva->irq_err);
+
+ switch (cmd) {
+ case H264_ENC:
+ reg &= ~CLK_GATING_HVC;
+ writel_relaxed(reg, hva->regs + HVA_HIF_REG_CLK_GATING);
+ break;
+ default:
+ dev_dbg(dev, "%s unknown command 0x%x\n", ctx->name, cmd);
+ }
+
+ pm_runtime_put_autosuspend(dev);
+ mutex_unlock(&hva->protect_mutex);
+
+ return ret;
+}
diff --git a/drivers/media/platform/sti/hva/hva-hw.h b/drivers/media/platform/sti/hva/hva-hw.h
new file mode 100644
index 0000000..efb45b9
--- /dev/null
+++ b/drivers/media/platform/sti/hva/hva-hw.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) STMicroelectronics SA 2015
+ * Authors: Yannick Fertre <yannick.fertre@xxxxxx>
+ * Hugues Fruchet <hugues.fruchet@xxxxxx>
+ * License terms: GNU General Public License (GPL), version 2
+ */
+
+#ifndef HVA_HW_H
+#define HVA_HW_H
+
+#include "hva-mem.h"
+
+/* HVA Versions */
+#define HVA_VERSION_UNKNOWN 0x000
+#define HVA_VERSION_V400 0x400
+
+/* HVA command types */
+enum hva_hw_cmd_type {
+ /* RESERVED = 0x00 */
+ /* RESERVED = 0x01 */
+ H264_ENC = 0x02,
+ /* RESERVED = 0x03 */
+ /* RESERVED = 0x04 */
+ /* RESERVED = 0x05 */
+ /* RESERVED = 0x06 */
+ /* RESERVED = 0x07 */
+ REMOVE_CLIENT = 0x08,
+ FREEZE_CLIENT = 0x09,
+ START_CLIENT = 0x0A,
+ FREEZE_ALL = 0x0B,
+ START_ALL = 0x0C,
+ REMOVE_ALL = 0x0D
+};
+
+int hva_hw_probe(struct platform_device *pdev, struct hva_dev *hva);
+void hva_hw_remove(struct hva_dev *hva);
+int hva_hw_runtime_suspend(struct device *dev);
+int hva_hw_runtime_resume(struct device *dev);
+int hva_hw_execute_task(struct hva_ctx *ctx, enum hva_hw_cmd_type cmd,
+ struct hva_buffer *task);
+
+#endif /* HVA_HW_H */
diff --git a/drivers/media/platform/sti/hva/hva-mem.c b/drivers/media/platform/sti/hva/hva-mem.c
new file mode 100644
index 0000000..649f660
--- /dev/null
+++ b/drivers/media/platform/sti/hva/hva-mem.c
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) STMicroelectronics SA 2015
+ * Authors: Yannick Fertre <yannick.fertre@xxxxxx>
+ * Hugues Fruchet <hugues.fruchet@xxxxxx>
+ * License terms: GNU General Public License (GPL), version 2
+ */
+
+#include "hva.h"
+#include "hva-mem.h"
+
+int hva_mem_alloc(struct hva_ctx *ctx, u32 size, const char *name,
+ struct hva_buffer **buf)
+{
+ struct device *dev = ctx_to_dev(ctx);
+ struct hva_buffer *b;
+ dma_addr_t paddr;
+ void *base;
+
+ b = devm_kzalloc(dev, sizeof(*b), GFP_KERNEL);
+ if (!b)
+ return -ENOMEM;
+
+ base = dma_alloc_attrs(dev, size, &paddr, GFP_KERNEL | GFP_DMA,
+ DMA_ATTR_WRITE_COMBINE);
+ if (!base) {
+ dev_err(dev, "%s %s : dma_alloc_attrs failed for %s (size=%d)\n",
+ ctx->name, __func__, name, size);
+ devm_kfree(dev, b);
+ return -ENOMEM;
+ }
+
+ b->size = size;
+ b->paddr = paddr;
+ b->vaddr = base;
+ b->name = name;
+
+ dev_dbg(dev,
+ "%s allocate %d bytes of HW memory @(virt=%p, phy=%pad): %s\n",
+ ctx->name, size, b->vaddr, &b->paddr, b->name);
+
+ /* return hva buffer to user */
+ *buf = b;
+
+ return 0;
+}
+
+void hva_mem_free(struct hva_ctx *ctx, struct hva_buffer *buf)
+{
+ struct device *dev = ctx_to_dev(ctx);
+
+ dev_dbg(dev,
+ "%s free %d bytes of HW memory @(virt=%p, phy=%pad): %s\n",
+ ctx->name, buf->size, buf->vaddr, &buf->paddr, buf->name);
+
+ dma_free_attrs(dev, buf->size, buf->vaddr, buf->paddr,
+ DMA_ATTR_WRITE_COMBINE);
+
+ devm_kfree(dev, buf);
+}
diff --git a/drivers/media/platform/sti/hva/hva-mem.h b/drivers/media/platform/sti/hva/hva-mem.h
new file mode 100644
index 0000000..a95c728
--- /dev/null
+++ b/drivers/media/platform/sti/hva/hva-mem.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) STMicroelectronics SA 2015
+ * Authors: Yannick Fertre <yannick.fertre@xxxxxx>
+ * Hugues Fruchet <hugues.fruchet@xxxxxx>
+ * License terms: GNU General Public License (GPL), version 2
+ */
+
+#ifndef HVA_MEM_H
+#define HVA_MEM_H
+
+/**
+ * struct hva_buffer - hva buffer
+ *
+ * @name: name of requester
+ * @paddr: physical address (for hardware)
+ * @vaddr: virtual address (kernel can read/write)
+ * @size: size of buffer
+ */
+struct hva_buffer {
+ const char *name;
+ dma_addr_t paddr;
+ void *vaddr;
+ u32 size;
+};
+
+int hva_mem_alloc(struct hva_ctx *ctx,
+ __u32 size,
+ const char *name,
+ struct hva_buffer **buf);
+
+void hva_mem_free(struct hva_ctx *ctx,
+ struct hva_buffer *buf);
+
+#endif /* HVA_MEM_H */
diff --git a/drivers/media/platform/sti/hva/hva-v4l2.c b/drivers/media/platform/sti/hva/hva-v4l2.c
new file mode 100644
index 0000000..54e79f7
--- /dev/null
+++ b/drivers/media/platform/sti/hva/hva-v4l2.c
@@ -0,0 +1,1308 @@
+/*
+ * Copyright (C) STMicroelectronics SA 2015
+ * Authors: Yannick Fertre <yannick.fertre@xxxxxx>
+ * Hugues Fruchet <hugues.fruchet@xxxxxx>
+ * License terms: GNU General Public License (GPL), version 2
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include "hva.h"
+#include "hva-hw.h"
+
+#define HVA_NAME "st-hva"
+
+#define MIN_FRAMES 1
+#define MIN_STREAMS 1
+
+#define HVA_MIN_WIDTH 32
+#define HVA_MAX_WIDTH 1920
+#define HVA_MIN_HEIGHT 32
+#define HVA_MAX_HEIGHT 1920
+
+/* HVA requires a 16x16 pixels alignment for frames */
+#define HVA_WIDTH_ALIGNMENT 16
+#define HVA_HEIGHT_ALIGNMENT 16
+
+#define HVA_DEFAULT_WIDTH HVA_MIN_WIDTH
+#define HVA_DEFAULT_HEIGHT HVA_MIN_HEIGHT
+#define HVA_DEFAULT_FRAME_NUM 1
+#define HVA_DEFAULT_FRAME_DEN 30
+
+#define to_type_str(type) (type == V4L2_BUF_TYPE_VIDEO_OUTPUT ? \
+ "frame" : "stream")
+
+#define fh_to_ctx(f) (container_of(f, struct hva_ctx, fh))
+
+/* registry of available encoders */
+const struct hva_enc *hva_encoders[] = {
+};
+
+static inline int frame_size(u32 w, u32 h, u32 fmt)
+{
+ switch (fmt) {
+ case V4L2_PIX_FMT_NV12:
+ case V4L2_PIX_FMT_NV21:
+ return (w * h * 3) / 2;
+ default:
+ return 0;
+ }
+}
+
+static inline int frame_stride(u32 w, u32 fmt)
+{
+ switch (fmt) {
+ case V4L2_PIX_FMT_NV12:
+ case V4L2_PIX_FMT_NV21:
+ return w;
+ default:
+ return 0;
+ }
+}
+
+static inline int frame_alignment(u32 fmt)
+{
+ switch (fmt) {
+ case V4L2_PIX_FMT_NV12:
+ case V4L2_PIX_FMT_NV21:
+ /* multiple of 2 */
+ return 2;
+ default:
+ return 1;
+ }
+}
+
+static inline int estimated_stream_size(u32 w, u32 h)
+{
+ /*
+ * HVA only encodes in YUV420 format, whatever the frame format.
+ * A compression ratio of 2 is assumed: thus, the maximum size
+ * of a stream is estimated to ((width x height x 3 / 2) / 2)
+ */
+ return (w * h * 3) / 4;
+}
+
+static void set_default_params(struct hva_ctx *ctx)
+{
+ struct hva_frameinfo *frameinfo = &ctx->frameinfo;
+ struct hva_streaminfo *streaminfo = &ctx->streaminfo;
+
+ frameinfo->pixelformat = V4L2_PIX_FMT_NV12;
+ frameinfo->width = HVA_DEFAULT_WIDTH;
+ frameinfo->height = HVA_DEFAULT_HEIGHT;
+ frameinfo->aligned_width = ALIGN(frameinfo->width,
+ HVA_WIDTH_ALIGNMENT);
+ frameinfo->aligned_height = ALIGN(frameinfo->height,
+ HVA_HEIGHT_ALIGNMENT);
+ frameinfo->size = frame_size(frameinfo->aligned_width,
+ frameinfo->aligned_height,
+ frameinfo->pixelformat);
+
+ streaminfo->streamformat = V4L2_PIX_FMT_H264;
+ streaminfo->width = HVA_DEFAULT_WIDTH;
+ streaminfo->height = HVA_DEFAULT_HEIGHT;
+
+ ctx->colorspace = V4L2_COLORSPACE_REC709;
+ ctx->xfer_func = V4L2_XFER_FUNC_DEFAULT;
+ ctx->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
+ ctx->quantization = V4L2_QUANTIZATION_DEFAULT;
+
+ ctx->max_stream_size = estimated_stream_size(streaminfo->width,
+ streaminfo->height);
+}
+
+static const struct hva_enc *hva_find_encoder(struct hva_ctx *ctx,
+ u32 pixelformat,
+ u32 streamformat)
+{
+ struct hva_dev *hva = ctx_to_hdev(ctx);
+ const struct hva_enc *enc;
+ unsigned int i;
+
+ for (i = 0; i < hva->nb_of_encoders; i++) {
+ enc = hva->encoders[i];
+ if ((enc->pixelformat == pixelformat) &&
+ (enc->streamformat == streamformat))
+ return enc;
+ }
+
+ return NULL;
+}
+
+static void register_format(u32 format, u32 formats[], u32 *nb_of_formats)
+{
+ u32 i;
+ bool found = false;
+
+ for (i = 0; i < *nb_of_formats; i++) {
+ if (format == formats[i]) {
+ found = true;
+ break;
+ }
+ }
+
+ if (!found)
+ formats[(*nb_of_formats)++] = format;
+}
+
+static void register_formats(struct hva_dev *hva)
+{
+ unsigned int i;
+
+ for (i = 0; i < hva->nb_of_encoders; i++) {
+ register_format(hva->encoders[i]->pixelformat,
+ hva->pixelformats,
+ &hva->nb_of_pixelformats);
+
+ register_format(hva->encoders[i]->streamformat,
+ hva->streamformats,
+ &hva->nb_of_streamformats);
+ }
+}
+
+static void register_encoders(struct hva_dev *hva)
+{
+ struct device *dev = hva_to_dev(hva);
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(hva_encoders); i++) {
+ if (hva->nb_of_encoders >= HVA_MAX_ENCODERS) {
+ dev_dbg(dev,
+ "%s failed to register %s encoder (%d maximum reached)\n",
+ HVA_PREFIX, hva_encoders[i]->name,
+ HVA_MAX_ENCODERS);
+ return;
+ }
+
+ hva->encoders[hva->nb_of_encoders++] = hva_encoders[i];
+ dev_info(dev, "%s %s encoder registered\n", HVA_PREFIX,
+ hva_encoders[i]->name);
+ }
+}
+
+static int hva_open_encoder(struct hva_ctx *ctx, u32 streamformat,
+ u32 pixelformat, struct hva_enc **penc)
+{
+ struct hva_dev *hva = ctx_to_hdev(ctx);
+ struct device *dev = ctx_to_dev(ctx);
+ struct hva_enc *enc;
+ int ret;
+
+ /* find an encoder which can deal with these formats */
+ enc = (struct hva_enc *)hva_find_encoder(ctx, pixelformat,
+ streamformat);
+ if (!enc) {
+ dev_err(dev, "%s no encoder found matching %4.4s => %4.4s\n",
+ ctx->name, (char *)&pixelformat, (char *)&streamformat);
+ return -EINVAL;
+ }
+
+ dev_dbg(dev, "%s one encoder matching %4.4s => %4.4s\n",
+ ctx->name, (char *)&pixelformat, (char *)&streamformat);
+
+ /* update instance name */
+ snprintf(ctx->name, sizeof(ctx->name), "[%3d:%4.4s]",
+ hva->instance_id, (char *)&streamformat);
+
+ /* open encoder instance */
+ ret = enc->open(ctx);
+ if (ret) {
+ dev_err(dev, "%s failed to open encoder instance (%d)\n",
+ ctx->name, ret);
+ return ret;
+ }
+
+ dev_dbg(dev, "%s %s encoder opened\n", ctx->name, enc->name);
+
+ *penc = enc;
+
+ return ret;
+}
+
+/*
+ * V4L2 ioctl operations
+ */
+
+static int hva_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ struct hva_ctx *ctx = fh_to_ctx(file->private_data);
+ struct hva_dev *hva = ctx_to_hdev(ctx);
+
+ strlcpy(cap->driver, HVA_NAME, sizeof(cap->driver));
+ strlcpy(cap->card, hva->vdev->name, sizeof(cap->card));
+ snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
+ hva->pdev->name);
+
+ return 0;
+}
+
+static int hva_enum_fmt_stream(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ struct hva_ctx *ctx = fh_to_ctx(file->private_data);
+ struct hva_dev *hva = ctx_to_hdev(ctx);
+
+ if (unlikely(f->index >= hva->nb_of_streamformats))
+ return -EINVAL;
+
+ f->pixelformat = hva->streamformats[f->index];
+
+ return 0;
+}
+
+static int hva_enum_fmt_frame(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ struct hva_ctx *ctx = fh_to_ctx(file->private_data);
+ struct hva_dev *hva = ctx_to_hdev(ctx);
+
+ if (unlikely(f->index >= hva->nb_of_pixelformats))
+ return -EINVAL;
+
+ f->pixelformat = hva->pixelformats[f->index];
+
+ return 0;
+}
+
+static int hva_g_fmt_stream(struct file *file, void *fh, struct v4l2_format *f)
+{
+ struct hva_ctx *ctx = fh_to_ctx(file->private_data);
+ struct hva_streaminfo *streaminfo = &ctx->streaminfo;
+
+ f->fmt.pix.width = streaminfo->width;
+ f->fmt.pix.height = streaminfo->height;
+ f->fmt.pix.field = V4L2_FIELD_NONE;
+ f->fmt.pix.colorspace = ctx->colorspace;
+ f->fmt.pix.xfer_func = ctx->xfer_func;
+ f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc;
+ f->fmt.pix.quantization = ctx->quantization;
+ f->fmt.pix.pixelformat = streaminfo->streamformat;
+ f->fmt.pix.bytesperline = 0;
+ f->fmt.pix.sizeimage = ctx->max_stream_size;
+
+ return 0;
+}
+
+static int hva_g_fmt_frame(struct file *file, void *fh, struct v4l2_format *f)
+{
+ struct hva_ctx *ctx = fh_to_ctx(file->private_data);
+ struct hva_frameinfo *frameinfo = &ctx->frameinfo;
+
+ f->fmt.pix.width = frameinfo->width;
+ f->fmt.pix.height = frameinfo->height;
+ f->fmt.pix.field = V4L2_FIELD_NONE;
+ f->fmt.pix.colorspace = ctx->colorspace;
+ f->fmt.pix.xfer_func = ctx->xfer_func;
+ f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc;
+ f->fmt.pix.quantization = ctx->quantization;
+ f->fmt.pix.pixelformat = frameinfo->pixelformat;
+ f->fmt.pix.bytesperline = frame_stride(frameinfo->aligned_width,
+ frameinfo->pixelformat);
+ f->fmt.pix.sizeimage = frameinfo->size;
+
+ return 0;
+}
+
+static int hva_try_fmt_stream(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct hva_ctx *ctx = fh_to_ctx(file->private_data);
+ struct device *dev = ctx_to_dev(ctx);
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ u32 streamformat = pix->pixelformat;
+ const struct hva_enc *enc;
+ u32 width, height;
+ u32 stream_size;
+
+ enc = hva_find_encoder(ctx, ctx->frameinfo.pixelformat, streamformat);
+ if (!enc) {
+ dev_dbg(dev,
+ "%s V4L2 TRY_FMT (CAPTURE): unsupported format %.4s\n",
+ ctx->name, (char *)&pix->pixelformat);
+ return -EINVAL;
+ }
+
+ width = pix->width;
+ height = pix->height;
+ if (ctx->flags & HVA_FLAG_FRAMEINFO) {
+ /*
+ * if the frame resolution is already fixed, only allow the
+ * same stream resolution
+ */
+ pix->width = ctx->frameinfo.width;
+ pix->height = ctx->frameinfo.height;
+ if ((pix->width != width) || (pix->height != height))
+ dev_dbg(dev,
+ "%s V4L2 TRY_FMT (CAPTURE): resolution updated %dx%d -> %dx%d to fit frame resolution\n",
+ ctx->name, width, height,
+ pix->width, pix->height);
+ } else {
+ /* adjust width & height */
+ v4l_bound_align_image(&pix->width,
+ HVA_MIN_WIDTH, enc->max_width,
+ 0,
+ &pix->height,
+ HVA_MIN_HEIGHT, enc->max_height,
+ 0,
+ 0);
+
+ if ((pix->width != width) || (pix->height != height))
+ dev_dbg(dev,
+ "%s V4L2 TRY_FMT (CAPTURE): resolution updated %dx%d -> %dx%d to fit min/max/alignment\n",
+ ctx->name, width, height,
+ pix->width, pix->height);
+ }
+
+ stream_size = estimated_stream_size(pix->width, pix->height);
+ if (pix->sizeimage < stream_size)
+ pix->sizeimage = stream_size;
+
+ pix->bytesperline = 0;
+ pix->colorspace = ctx->colorspace;
+ pix->xfer_func = ctx->xfer_func;
+ pix->ycbcr_enc = ctx->ycbcr_enc;
+ pix->quantization = ctx->quantization;
+ pix->field = V4L2_FIELD_NONE;
+
+ return 0;
+}
+
+static int hva_try_fmt_frame(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct hva_ctx *ctx = fh_to_ctx(file->private_data);
+ struct device *dev = ctx_to_dev(ctx);
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ u32 pixelformat = pix->pixelformat;
+ const struct hva_enc *enc;
+ u32 width, height;
+
+ enc = hva_find_encoder(ctx, pixelformat, ctx->streaminfo.streamformat);
+ if (!enc) {
+ dev_dbg(dev,
+ "%s V4L2 TRY_FMT (OUTPUT): unsupported format %.4s\n",
+ ctx->name, (char *)&pixelformat);
+ return -EINVAL;
+ }
+
+ /* adjust width & height */
+ width = pix->width;
+ height = pix->height;
+ v4l_bound_align_image(&pix->width,
+ HVA_MIN_WIDTH, HVA_MAX_WIDTH,
+ frame_alignment(pixelformat) - 1,
+ &pix->height,
+ HVA_MIN_HEIGHT, HVA_MAX_HEIGHT,
+ frame_alignment(pixelformat) - 1,
+ 0);
+
+ if ((pix->width != width) || (pix->height != height))
+ dev_dbg(dev,
+ "%s V4L2 TRY_FMT (OUTPUT): resolution updated %dx%d -> %dx%d to fit min/max/alignment\n",
+ ctx->name, width, height, pix->width, pix->height);
+
+ width = ALIGN(pix->width, HVA_WIDTH_ALIGNMENT);
+ height = ALIGN(pix->height, HVA_HEIGHT_ALIGNMENT);
+
+ if (!pix->colorspace) {
+ pix->colorspace = V4L2_COLORSPACE_REC709;
+ pix->xfer_func = V4L2_XFER_FUNC_DEFAULT;
+ pix->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
+ pix->quantization = V4L2_QUANTIZATION_DEFAULT;
+ }
+
+ pix->bytesperline = frame_stride(width, pixelformat);
+ pix->sizeimage = frame_size(width, height, pixelformat);
+ pix->field = V4L2_FIELD_NONE;
+
+ return 0;
+}
+
+static int hva_s_fmt_stream(struct file *file, void *fh, struct v4l2_format *f)
+{
+ struct hva_ctx *ctx = fh_to_ctx(file->private_data);
+ struct device *dev = ctx_to_dev(ctx);
+ struct vb2_queue *vq;
+ int ret;
+
+ ret = hva_try_fmt_stream(file, fh, f);
+ if (ret) {
+ dev_dbg(dev, "%s V4L2 S_FMT (CAPTURE): unsupported format %.4s\n",
+ ctx->name, (char *)&f->fmt.pix.pixelformat);
+ return ret;
+ }
+
+ vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
+ if (vb2_is_streaming(vq)) {
+ dev_dbg(dev, "%s V4L2 S_FMT (CAPTURE): queue busy\n",
+ ctx->name);
+ return -EBUSY;
+ }
+
+ ctx->max_stream_size = f->fmt.pix.sizeimage;
+ ctx->streaminfo.width = f->fmt.pix.width;
+ ctx->streaminfo.height = f->fmt.pix.height;
+ ctx->streaminfo.streamformat = f->fmt.pix.pixelformat;
+ ctx->flags |= HVA_FLAG_STREAMINFO;
+
+ return 0;
+}
+
+static int hva_s_fmt_frame(struct file *file, void *fh, struct v4l2_format *f)
+{
+ struct hva_ctx *ctx = fh_to_ctx(file->private_data);
+ struct device *dev = ctx_to_dev(ctx);
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ struct vb2_queue *vq;
+ int ret;
+
+ ret = hva_try_fmt_frame(file, fh, f);
+ if (ret) {
+ dev_dbg(dev, "%s V4L2 S_FMT (OUTPUT): unsupported format %.4s\n",
+ ctx->name, (char *)&pix->pixelformat);
+ return ret;
+ }
+
+ vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
+ if (vb2_is_streaming(vq)) {
+ dev_dbg(dev, "%s V4L2 S_FMT (OUTPUT): queue busy\n", ctx->name);
+ return -EBUSY;
+ }
+
+ ctx->colorspace = pix->colorspace;
+ ctx->xfer_func = pix->xfer_func;
+ ctx->ycbcr_enc = pix->ycbcr_enc;
+ ctx->quantization = pix->quantization;
+
+ ctx->frameinfo.aligned_width = ALIGN(pix->width, HVA_WIDTH_ALIGNMENT);
+ ctx->frameinfo.aligned_height = ALIGN(pix->height,
+ HVA_HEIGHT_ALIGNMENT);
+ ctx->frameinfo.size = pix->sizeimage;
+ ctx->frameinfo.pixelformat = pix->pixelformat;
+ ctx->frameinfo.width = pix->width;
+ ctx->frameinfo.height = pix->height;
+ ctx->flags |= HVA_FLAG_FRAMEINFO;
+
+ return 0;
+}
+
+static int hva_g_parm(struct file *file, void *fh, struct v4l2_streamparm *sp)
+{
+ struct hva_ctx *ctx = fh_to_ctx(file->private_data);
+ struct v4l2_fract *time_per_frame = &ctx->ctrls.time_per_frame;
+
+ if (sp->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
+ return -EINVAL;
+
+ sp->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
+ sp->parm.output.timeperframe.numerator = time_per_frame->numerator;
+ sp->parm.output.timeperframe.denominator =
+ time_per_frame->denominator;
+
+ return 0;
+}
+
+static int hva_s_parm(struct file *file, void *fh, struct v4l2_streamparm *sp)
+{
+ struct hva_ctx *ctx = fh_to_ctx(file->private_data);
+ struct v4l2_fract *time_per_frame = &ctx->ctrls.time_per_frame;
+
+ if (sp->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
+ return -EINVAL;
+
+ if (!sp->parm.output.timeperframe.numerator ||
+ !sp->parm.output.timeperframe.denominator)
+ return hva_g_parm(file, fh, sp);
+
+ sp->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
+ time_per_frame->numerator = sp->parm.output.timeperframe.numerator;
+ time_per_frame->denominator =
+ sp->parm.output.timeperframe.denominator;
+
+ return 0;
+}
+
+static int hva_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
+{
+ struct hva_ctx *ctx = fh_to_ctx(file->private_data);
+ struct device *dev = ctx_to_dev(ctx);
+
+ if (buf->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
+ /*
+ * depending on the targeted compressed video format, the
+ * capture buffer might contain headers (e.g. H.264 SPS/PPS)
+ * filled in by the driver client; the size of these data is
+ * copied from the bytesused field of the V4L2 buffer in the
+ * payload field of the hva stream buffer
+ */
+ struct vb2_queue *vq;
+ struct hva_stream *stream;
+
+ vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, buf->type);
+
+ if (buf->index >= vq->num_buffers) {
+ dev_dbg(dev, "%s buffer index %d out of range (%d)\n",
+ ctx->name, buf->index, vq->num_buffers);
+ return -EINVAL;
+ }
+
+ stream = (struct hva_stream *)vq->bufs[buf->index];
+ stream->bytesused = buf->bytesused;
+ }
+
+ return v4l2_m2m_qbuf(file, ctx->fh.m2m_ctx, buf);
+}
+
+/* V4L2 ioctl ops */
+static const struct v4l2_ioctl_ops hva_ioctl_ops = {
+ .vidioc_querycap = hva_querycap,
+ .vidioc_enum_fmt_vid_cap = hva_enum_fmt_stream,
+ .vidioc_enum_fmt_vid_out = hva_enum_fmt_frame,
+ .vidioc_g_fmt_vid_cap = hva_g_fmt_stream,
+ .vidioc_g_fmt_vid_out = hva_g_fmt_frame,
+ .vidioc_try_fmt_vid_cap = hva_try_fmt_stream,
+ .vidioc_try_fmt_vid_out = hva_try_fmt_frame,
+ .vidioc_s_fmt_vid_cap = hva_s_fmt_stream,
+ .vidioc_s_fmt_vid_out = hva_s_fmt_frame,
+ .vidioc_g_parm = hva_g_parm,
+ .vidioc_s_parm = hva_s_parm,
+ .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
+ .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
+ .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
+ .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
+ .vidioc_qbuf = hva_qbuf,
+ .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
+ .vidioc_streamon = v4l2_m2m_ioctl_streamon,
+ .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+/*
+ * V4L2 control operations
+ */
+
+static int hva_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct hva_ctx *ctx = container_of(ctrl->handler, struct hva_ctx,
+ ctrl_handler);
+ struct device *dev = ctx_to_dev(ctx);
+
+ dev_dbg(dev, "%s S_CTRL: id = %d, val = %d\n", ctx->name,
+ ctrl->id, ctrl->val);
+
+ switch (ctrl->id) {
+ case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
+ ctx->ctrls.bitrate_mode = ctrl->val;
+ break;
+ case V4L2_CID_MPEG_VIDEO_GOP_SIZE:
+ ctx->ctrls.gop_size = ctrl->val;
+ break;
+ case V4L2_CID_MPEG_VIDEO_BITRATE:
+ ctx->ctrls.bitrate = ctrl->val;
+ break;
+ case V4L2_CID_MPEG_VIDEO_ASPECT:
+ ctx->ctrls.aspect = ctrl->val;
+ break;
+ default:
+ dev_dbg(dev, "%s S_CTRL: invalid control (id = %d)\n",
+ ctx->name, ctrl->id);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/* V4L2 control ops */
+static const struct v4l2_ctrl_ops hva_ctrl_ops = {
+ .s_ctrl = hva_s_ctrl,
+};
+
+static int hva_ctrls_setup(struct hva_ctx *ctx)
+{
+ struct device *dev = ctx_to_dev(ctx);
+ u64 mask;
+
+ v4l2_ctrl_handler_init(&ctx->ctrl_handler, 4);
+
+ v4l2_ctrl_new_std_menu(&ctx->ctrl_handler, &hva_ctrl_ops,
+ V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
+ V4L2_MPEG_VIDEO_BITRATE_MODE_CBR,
+ 0,
+ V4L2_MPEG_VIDEO_BITRATE_MODE_CBR);
+
+ v4l2_ctrl_new_std(&ctx->ctrl_handler, &hva_ctrl_ops,
+ V4L2_CID_MPEG_VIDEO_GOP_SIZE,
+ 1, 60, 1, 16);
+
+ v4l2_ctrl_new_std(&ctx->ctrl_handler, &hva_ctrl_ops,
+ V4L2_CID_MPEG_VIDEO_BITRATE,
+ 1000, 60000000, 1000, 20000000);
+
+ mask = ~(1 << V4L2_MPEG_VIDEO_ASPECT_1x1);
+ v4l2_ctrl_new_std_menu(&ctx->ctrl_handler, &hva_ctrl_ops,
+ V4L2_CID_MPEG_VIDEO_ASPECT,
+ V4L2_MPEG_VIDEO_ASPECT_1x1,
+ mask,
+ V4L2_MPEG_VIDEO_ASPECT_1x1);
+
+ if (ctx->ctrl_handler.error) {
+ int err = ctx->ctrl_handler.error;
+
+ dev_dbg(dev, "%s controls setup failed (%d)\n",
+ ctx->name, err);
+ v4l2_ctrl_handler_free(&ctx->ctrl_handler);
+ return err;
+ }
+
+ v4l2_ctrl_handler_setup(&ctx->ctrl_handler);
+
+ /* set default time per frame */
+ ctx->ctrls.time_per_frame.numerator = HVA_DEFAULT_FRAME_NUM;
+ ctx->ctrls.time_per_frame.denominator = HVA_DEFAULT_FRAME_DEN;
+
+ return 0;
+}
+
+/*
+ * mem-to-mem operations
+ */
+
+static void hva_run_work(struct work_struct *work)
+{
+ struct hva_ctx *ctx = container_of(work, struct hva_ctx, run_work);
+ struct vb2_v4l2_buffer *src_buf, *dst_buf;
+ const struct hva_enc *enc = ctx->enc;
+ struct hva_frame *frame;
+ struct hva_stream *stream;
+ int ret;
+
+ /* protect instance against reentrancy */
+ mutex_lock(&ctx->lock);
+
+ src_buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
+ dst_buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
+
+ frame = to_hva_frame(src_buf);
+ stream = to_hva_stream(dst_buf);
+ frame->vbuf.sequence = ctx->frame_num++;
+
+ ret = enc->encode(ctx, frame, stream);
+
+ vb2_set_plane_payload(&dst_buf->vb2_buf, 0, stream->bytesused);
+ if (ret) {
+ v4l2_m2m_buf_done(src_buf, VB2_BUF_STATE_ERROR);
+ v4l2_m2m_buf_done(dst_buf, VB2_BUF_STATE_ERROR);
+ } else {
+ /* propagate frame timestamp */
+ dst_buf->vb2_buf.timestamp = src_buf->vb2_buf.timestamp;
+ dst_buf->field = V4L2_FIELD_NONE;
+ dst_buf->sequence = ctx->stream_num - 1;
+
+ v4l2_m2m_buf_done(src_buf, VB2_BUF_STATE_DONE);
+ v4l2_m2m_buf_done(dst_buf, VB2_BUF_STATE_DONE);
+ }
+
+ mutex_unlock(&ctx->lock);
+
+ v4l2_m2m_job_finish(ctx->hva_dev->m2m_dev, ctx->fh.m2m_ctx);
+}
+
+static void hva_device_run(void *priv)
+{
+ struct hva_ctx *ctx = priv;
+ struct hva_dev *hva = ctx_to_hdev(ctx);
+
+ queue_work(hva->work_queue, &ctx->run_work);
+}
+
+static void hva_job_abort(void *priv)
+{
+ struct hva_ctx *ctx = priv;
+ struct device *dev = ctx_to_dev(ctx);
+
+ dev_dbg(dev, "%s aborting job\n", ctx->name);
+
+ ctx->aborting = true;
+}
+
+static int hva_job_ready(void *priv)
+{
+ struct hva_ctx *ctx = priv;
+ struct device *dev = ctx_to_dev(ctx);
+
+ if (!v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx)) {
+ dev_dbg(dev, "%s job not ready: no frame buffers\n",
+ ctx->name);
+ return 0;
+ }
+
+ if (!v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx)) {
+ dev_dbg(dev, "%s job not ready: no stream buffers\n",
+ ctx->name);
+ return 0;
+ }
+
+ if (ctx->aborting) {
+ dev_dbg(dev, "%s job not ready: aborting\n", ctx->name);
+ return 0;
+ }
+
+ return 1;
+}
+
+/* mem-to-mem ops */
+static const struct v4l2_m2m_ops hva_m2m_ops = {
+ .device_run = hva_device_run,
+ .job_abort = hva_job_abort,
+ .job_ready = hva_job_ready,
+};
+
+/*
+ * VB2 queue operations
+ */
+
+static int hva_queue_setup(struct vb2_queue *vq,
+ unsigned int *num_buffers, unsigned int *num_planes,
+ unsigned int sizes[], struct device *alloc_devs[])
+{
+ struct hva_ctx *ctx = vb2_get_drv_priv(vq);
+ struct device *dev = ctx_to_dev(ctx);
+ unsigned int size;
+
+ dev_dbg(dev, "%s %s queue setup: num_buffers %d\n", ctx->name,
+ to_type_str(vq->type), *num_buffers);
+
+ size = vq->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ?
+ ctx->frameinfo.size : ctx->max_stream_size;
+
+ if (*num_planes)
+ return sizes[0] < size ? -EINVAL : 0;
+
+ /* only one plane supported */
+ *num_planes = 1;
+ sizes[0] = size;
+
+ return 0;
+}
+
+static int hva_buf_prepare(struct vb2_buffer *vb)
+{
+ struct hva_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+ struct device *dev = ctx_to_dev(ctx);
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+
+ if (vb->vb2_queue->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
+ struct hva_frame *frame = to_hva_frame(vbuf);
+
+ if (vbuf->field == V4L2_FIELD_ANY)
+ vbuf->field = V4L2_FIELD_NONE;
+ if (vbuf->field != V4L2_FIELD_NONE) {
+ dev_dbg(dev,
+ "%s frame[%d] prepare: %d field not supported\n",
+ ctx->name, vb->index, vbuf->field);
+ return -EINVAL;
+ }
+
+ if (!frame->prepared) {
+ /* get memory addresses */
+ frame->vaddr = vb2_plane_vaddr(&vbuf->vb2_buf, 0);
+ frame->paddr = vb2_dma_contig_plane_dma_addr(
+ &vbuf->vb2_buf, 0);
+ frame->info = ctx->frameinfo;
+ frame->prepared = true;
+
+ dev_dbg(dev,
+ "%s frame[%d] prepared; virt=%p, phy=%pad\n",
+ ctx->name, vb->index,
+ frame->vaddr, &frame->paddr);
+ }
+ } else {
+ struct hva_stream *stream = to_hva_stream(vbuf);
+
+ if (!stream->prepared) {
+ /* get memory addresses */
+ stream->vaddr = vb2_plane_vaddr(&vbuf->vb2_buf, 0);
+ stream->paddr = vb2_dma_contig_plane_dma_addr(
+ &vbuf->vb2_buf, 0);
+ stream->size = vb2_plane_size(&vbuf->vb2_buf, 0);
+ stream->prepared = true;
+
+ dev_dbg(dev,
+ "%s stream[%d] prepared; virt=%p, phy=%pad\n",
+ ctx->name, vb->index,
+ stream->vaddr, &stream->paddr);
+ }
+ }
+
+ return 0;
+}
+
+static void hva_buf_queue(struct vb2_buffer *vb)
+{
+ struct hva_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+
+ if (ctx->fh.m2m_ctx)
+ v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
+}
+
+static int hva_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+ struct hva_ctx *ctx = vb2_get_drv_priv(vq);
+ struct hva_dev *hva = ctx_to_hdev(ctx);
+ struct device *dev = ctx_to_dev(ctx);
+ struct vb2_v4l2_buffer *vbuf;
+ int ret;
+ unsigned int i;
+ bool found = false;
+
+ dev_dbg(dev, "%s %s start streaming\n", ctx->name,
+ to_type_str(vq->type));
+
+ /* open encoder when both start_streaming have been called */
+ if (V4L2_TYPE_IS_OUTPUT(vq->type)) {
+ if (!vb2_start_streaming_called(&ctx->fh.m2m_ctx->cap_q_ctx.q))
+ return 0;
+ } else {
+ if (!vb2_start_streaming_called(&ctx->fh.m2m_ctx->out_q_ctx.q))
+ return 0;
+ }
+
+ /* store the instance context in the instances array */
+ for (i = 0; i < HVA_MAX_INSTANCES; i++) {
+ if (!hva->instances[i]) {
+ hva->instances[i] = ctx;
+ /* save the context identifier in the context */
+ ctx->id = i;
+ found = true;
+ break;
+ }
+ }
+
+ if (!found) {
+ dev_err(dev, "%s maximum instances reached\n", ctx->name);
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ hva->nb_of_instances++;
+
+ if (!ctx->enc) {
+ ret = hva_open_encoder(ctx,
+ ctx->streaminfo.streamformat,
+ ctx->frameinfo.pixelformat,
+ &ctx->enc);
+ if (ret < 0)
+ goto err_ctx;
+ }
+
+ return 0;
+
+err_ctx:
+ hva->instances[ctx->id] = NULL;
+ hva->nb_of_instances--;
+err:
+ if (vq->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
+ /* return of all pending buffers to vb2 (in queued state) */
+ while ((vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx)))
+ v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_QUEUED);
+ } else {
+ /* return of all pending buffers to vb2 (in queued state) */
+ while ((vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx)))
+ v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_QUEUED);
+ }
+
+ return ret;
+}
+
+static void hva_stop_streaming(struct vb2_queue *vq)
+{
+ struct hva_ctx *ctx = vb2_get_drv_priv(vq);
+ struct hva_dev *hva = ctx_to_hdev(ctx);
+ struct device *dev = ctx_to_dev(ctx);
+ const struct hva_enc *enc = ctx->enc;
+ struct vb2_v4l2_buffer *vbuf;
+
+ dev_dbg(dev, "%s %s stop streaming\n", ctx->name,
+ to_type_str(vq->type));
+
+ if (vq->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
+ /* return of all pending buffers to vb2 (in error state) */
+ ctx->frame_num = 0;
+ while ((vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx)))
+ v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
+ } else {
+ /* return of all pending buffers to vb2 (in error state) */
+ ctx->stream_num = 0;
+ while ((vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx)))
+ v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
+ }
+
+ if ((V4L2_TYPE_IS_OUTPUT(vq->type) &&
+ vb2_is_streaming(&ctx->fh.m2m_ctx->cap_q_ctx.q)) ||
+ (!V4L2_TYPE_IS_OUTPUT(vq->type) &&
+ vb2_is_streaming(&ctx->fh.m2m_ctx->out_q_ctx.q))) {
+ dev_dbg(dev, "%s %s out=%d cap=%d\n",
+ ctx->name, to_type_str(vq->type),
+ vb2_is_streaming(&ctx->fh.m2m_ctx->out_q_ctx.q),
+ vb2_is_streaming(&ctx->fh.m2m_ctx->cap_q_ctx.q));
+ return;
+ }
+
+ /* close encoder when both stop_streaming have been called */
+ if (enc) {
+ dev_dbg(dev, "%s %s encoder closed\n", ctx->name, enc->name);
+ enc->close(ctx);
+ ctx->enc = NULL;
+
+ /* clear instance context in instances array */
+ hva->instances[ctx->id] = NULL;
+ hva->nb_of_instances--;
+ }
+
+ ctx->aborting = false;
+}
+
+/* VB2 queue ops */
+static const struct vb2_ops hva_qops = {
+ .queue_setup = hva_queue_setup,
+ .buf_prepare = hva_buf_prepare,
+ .buf_queue = hva_buf_queue,
+ .start_streaming = hva_start_streaming,
+ .stop_streaming = hva_stop_streaming,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+};
+
+/*
+ * V4L2 file operations
+ */
+
+static int queue_init(struct hva_ctx *ctx, struct vb2_queue *vq)
+{
+ vq->io_modes = VB2_MMAP | VB2_DMABUF;
+ vq->drv_priv = ctx;
+ vq->ops = &hva_qops;
+ vq->mem_ops = &vb2_dma_contig_memops;
+ vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
+ vq->lock = &ctx->hva_dev->lock;
+
+ return vb2_queue_init(vq);
+}
+
+static int hva_queue_init(void *priv, struct vb2_queue *src_vq,
+ struct vb2_queue *dst_vq)
+{
+ struct hva_ctx *ctx = priv;
+ int ret;
+
+ src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+ src_vq->buf_struct_size = sizeof(struct hva_frame);
+ src_vq->min_buffers_needed = MIN_FRAMES;
+ src_vq->dev = ctx->hva_dev->dev;
+
+ ret = queue_init(ctx, src_vq);
+ if (ret)
+ return ret;
+
+ dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ dst_vq->buf_struct_size = sizeof(struct hva_stream);
+ dst_vq->min_buffers_needed = MIN_STREAMS;
+ dst_vq->dev = ctx->hva_dev->dev;
+
+ return queue_init(ctx, dst_vq);
+}
+
+static int hva_open(struct file *file)
+{
+ struct hva_dev *hva = video_drvdata(file);
+ struct device *dev = hva_to_dev(hva);
+ struct hva_ctx *ctx;
+ int ret;
+
+ ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+ if (!ctx) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ ctx->hva_dev = hva;
+
+ INIT_WORK(&ctx->run_work, hva_run_work);
+ v4l2_fh_init(&ctx->fh, video_devdata(file));
+ file->private_data = &ctx->fh;
+ v4l2_fh_add(&ctx->fh);
+
+ ret = hva_ctrls_setup(ctx);
+ if (ret) {
+ dev_err(dev, "%s [x:x] failed to setup controls\n",
+ HVA_PREFIX);
+ goto err_fh;
+ }
+ ctx->fh.ctrl_handler = &ctx->ctrl_handler;
+
+ mutex_init(&ctx->lock);
+
+ ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(hva->m2m_dev, ctx,
+ &hva_queue_init);
+ if (IS_ERR(ctx->fh.m2m_ctx)) {
+ ret = PTR_ERR(ctx->fh.m2m_ctx);
+ dev_err(dev, "%s failed to initialize m2m context (%d)\n",
+ HVA_PREFIX, ret);
+ goto err_ctrls;
+ }
+
+ /* set the instance name */
+ mutex_lock(&hva->lock);
+ hva->instance_id++;
+ snprintf(ctx->name, sizeof(ctx->name), "[%3d:----]",
+ hva->instance_id);
+ mutex_unlock(&hva->lock);
+
+ /* default parameters for frame and stream */
+ set_default_params(ctx);
+
+ dev_info(dev, "%s encoder instance created\n", ctx->name);
+
+ return 0;
+
+err_ctrls:
+ v4l2_ctrl_handler_free(&ctx->ctrl_handler);
+err_fh:
+ v4l2_fh_del(&ctx->fh);
+ v4l2_fh_exit(&ctx->fh);
+ kfree(ctx);
+out:
+ return ret;
+}
+
+static int hva_release(struct file *file)
+{
+ struct hva_ctx *ctx = fh_to_ctx(file->private_data);
+ struct hva_dev *hva = ctx_to_hdev(ctx);
+ struct device *dev = ctx_to_dev(ctx);
+ const struct hva_enc *enc = ctx->enc;
+
+ if (enc) {
+ dev_dbg(dev, "%s %s encoder closed\n", ctx->name, enc->name);
+ enc->close(ctx);
+ ctx->enc = NULL;
+
+ /* clear instance context in instances array */
+ hva->instances[ctx->id] = NULL;
+ hva->nb_of_instances--;
+ }
+
+ v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
+
+ v4l2_ctrl_handler_free(&ctx->ctrl_handler);
+
+ v4l2_fh_del(&ctx->fh);
+ v4l2_fh_exit(&ctx->fh);
+
+ dev_info(dev, "%s encoder instance released\n", ctx->name);
+
+ kfree(ctx);
+
+ return 0;
+}
+
+/* V4L2 file ops */
+static const struct v4l2_file_operations hva_fops = {
+ .owner = THIS_MODULE,
+ .open = hva_open,
+ .release = hva_release,
+ .unlocked_ioctl = video_ioctl2,
+ .mmap = v4l2_m2m_fop_mmap,
+ .poll = v4l2_m2m_fop_poll,
+};
+
+/*
+ * Platform device operations
+ */
+
+static int hva_register_device(struct hva_dev *hva)
+{
+ int ret;
+ struct video_device *vdev;
+ struct device *dev;
+
+ if (!hva)
+ return -ENODEV;
+ dev = hva_to_dev(hva);
+
+ hva->m2m_dev = v4l2_m2m_init(&hva_m2m_ops);
+ if (IS_ERR(hva->m2m_dev)) {
+ dev_err(dev, "%s failed to initialize v4l2-m2m device\n",
+ HVA_PREFIX);
+ ret = PTR_ERR(hva->m2m_dev);
+ goto err;
+ }
+
+ vdev = video_device_alloc();
+ if (!vdev) {
+ dev_err(dev, "%s failed to allocate video device\n",
+ HVA_PREFIX);
+ ret = -ENOMEM;
+ goto err_m2m_release;
+ }
+
+ vdev->fops = &hva_fops;
+ vdev->ioctl_ops = &hva_ioctl_ops;
+ vdev->release = video_device_release;
+ vdev->lock = &hva->lock;
+ vdev->vfl_dir = VFL_DIR_M2M;
+ vdev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M;
+ vdev->v4l2_dev = &hva->v4l2_dev;
+ snprintf(vdev->name, sizeof(vdev->name), "%s%lx", HVA_NAME,
+ hva->ip_version);
+
+ ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
+ if (ret) {
+ dev_err(dev, "%s failed to register video device\n",
+ HVA_PREFIX);
+ goto err_vdev_release;
+ }
+
+ hva->vdev = vdev;
+ video_set_drvdata(vdev, hva);
+ return 0;
+
+err_vdev_release:
+ video_device_release(vdev);
+err_m2m_release:
+ v4l2_m2m_release(hva->m2m_dev);
+err:
+ return ret;
+}
+
+static void hva_unregister_device(struct hva_dev *hva)
+{
+ if (!hva)
+ return;
+
+ if (hva->m2m_dev)
+ v4l2_m2m_release(hva->m2m_dev);
+
+ video_unregister_device(hva->vdev);
+}
+
+static int hva_probe(struct platform_device *pdev)
+{
+ struct hva_dev *hva;
+ struct device *dev = &pdev->dev;
+ int ret;
+
+ hva = devm_kzalloc(dev, sizeof(*hva), GFP_KERNEL);
+ if (!hva) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ hva->dev = dev;
+ hva->pdev = pdev;
+ platform_set_drvdata(pdev, hva);
+
+ mutex_init(&hva->lock);
+
+ /* probe hardware */
+ ret = hva_hw_probe(pdev, hva);
+ if (ret)
+ goto err;
+
+ /* register all available encoders */
+ register_encoders(hva);
+
+ /* register all supported formats */
+ register_formats(hva);
+
+ /* register on V4L2 */
+ ret = v4l2_device_register(dev, &hva->v4l2_dev);
+ if (ret) {
+ dev_err(dev, "%s %s failed to register V4L2 device\n",
+ HVA_PREFIX, HVA_NAME);
+ goto err_hw;
+ }
+
+ hva->work_queue = create_workqueue(HVA_NAME);
+ if (!hva->work_queue) {
+ dev_err(dev, "%s %s failed to allocate work queue\n",
+ HVA_PREFIX, HVA_NAME);
+ ret = -ENOMEM;
+ goto err_v4l2;
+ }
+
+ /* register device */
+ ret = hva_register_device(hva);
+ if (ret)
+ goto err_work_queue;
+
+ dev_info(dev, "%s %s registered as /dev/video%d\n", HVA_PREFIX,
+ HVA_NAME, hva->vdev->num);
+
+ return 0;
+
+err_work_queue:
+ destroy_workqueue(hva->work_queue);
+err_v4l2:
+ v4l2_device_unregister(&hva->v4l2_dev);
+err_hw:
+ hva_hw_remove(hva);
+err:
+ return ret;
+}
+
+static int hva_remove(struct platform_device *pdev)
+{
+ struct hva_dev *hva = platform_get_drvdata(pdev);
+ struct device *dev = hva_to_dev(hva);
+
+ hva_unregister_device(hva);
+
+ destroy_workqueue(hva->work_queue);
+
+ hva_hw_remove(hva);
+
+ v4l2_device_unregister(&hva->v4l2_dev);
+
+ dev_info(dev, "%s %s removed\n", HVA_PREFIX, pdev->name);
+
+ return 0;
+}
+
+/* PM ops */
+static const struct dev_pm_ops hva_pm_ops = {
+ .runtime_suspend = hva_hw_runtime_suspend,
+ .runtime_resume = hva_hw_runtime_resume,
+};
+
+static const struct of_device_id hva_match_types[] = {
+ {
+ .compatible = "st,st-hva",
+ },
+ { /* end node */ }
+};
+
+MODULE_DEVICE_TABLE(of, hva_match_types);
+
+struct platform_driver hva_driver = {
+ .probe = hva_probe,
+ .remove = hva_remove,
+ .driver = {
+ .name = HVA_NAME,
+ .of_match_table = hva_match_types,
+ .pm = &hva_pm_ops,
+ },
+};
+
+module_platform_driver(hva_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Yannick Fertre <yannick.fertre@xxxxxx>");
+MODULE_DESCRIPTION("STMicroelectronics HVA video encoder V4L2 driver");
diff --git a/drivers/media/platform/sti/hva/hva.h b/drivers/media/platform/sti/hva/hva.h
new file mode 100644
index 0000000..b62fda0
--- /dev/null
+++ b/drivers/media/platform/sti/hva/hva.h
@@ -0,0 +1,290 @@
+/*
+ * Copyright (C) STMicroelectronics SA 2015
+ * Authors: Yannick Fertre <yannick.fertre@xxxxxx>
+ * Hugues Fruchet <hugues.fruchet@xxxxxx>
+ * License terms: GNU General Public License (GPL), version 2
+ */
+
+#ifndef HVA_H
+#define HVA_H
+
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/videobuf2-v4l2.h>
+#include <media/v4l2-mem2mem.h>
+
+#define fh_to_ctx(f) (container_of(f, struct hva_ctx, fh))
+
+#define hva_to_dev(h) (h->dev)
+
+#define ctx_to_dev(c) (c->hva_dev->dev)
+
+#define ctx_to_hdev(c) (c->hva_dev)
+
+#define HVA_PREFIX "[---:----]"
+
+/**
+ * struct hva_frameinfo - information about hva frame
+ *
+ * @pixelformat: fourcc code for uncompressed video format
+ * @width: width of frame
+ * @height: height of frame
+ * @aligned_width: width of frame (with encoder alignment constraint)
+ * @aligned_height: height of frame (with encoder alignment constraint)
+ * @size: maximum size in bytes required for data
+*/
+struct hva_frameinfo {
+ u32 pixelformat;
+ u32 width;
+ u32 height;
+ u32 aligned_width;
+ u32 aligned_height;
+ u32 size;
+};
+
+/**
+ * struct hva_streaminfo - information about hva stream
+ *
+ * @streamformat: fourcc code of compressed video format (H.264...)
+ * @width: width of stream
+ * @height: height of stream
+ * @profile: profile string
+ * @level: level string
+ */
+struct hva_streaminfo {
+ u32 streamformat;
+ u32 width;
+ u32 height;
+ u8 profile[32];
+ u8 level[32];
+};
+
+/**
+ * struct hva_controls - hva controls set
+ *
+ * @time_per_frame: time per frame in seconds
+ * @bitrate_mode: bitrate mode (constant bitrate or variable bitrate)
+ * @gop_size: groupe of picture size
+ * @bitrate: bitrate (in bps)
+ * @aspect: video aspect
+ */
+struct hva_controls {
+ struct v4l2_fract time_per_frame;
+ enum v4l2_mpeg_video_bitrate_mode bitrate_mode;
+ u32 gop_size;
+ u32 bitrate;
+ enum v4l2_mpeg_video_aspect aspect;
+};
+
+/**
+ * struct hva_frame - hva frame buffer (output)
+ *
+ * @vbuf: video buffer information for V4L2
+ * @list: V4L2 m2m list that the frame belongs to
+ * @info: frame information (width, height, format, alignment...)
+ * @paddr: physical address (for hardware)
+ * @vaddr: virtual address (kernel can read/write)
+ * @prepared: true if vaddr/paddr are resolved
+ */
+struct hva_frame {
+ struct vb2_v4l2_buffer vbuf;
+ struct list_head list;
+ struct hva_frameinfo info;
+ dma_addr_t paddr;
+ void *vaddr;
+ bool prepared;
+};
+
+/*
+ * to_hva_frame() - cast struct vb2_v4l2_buffer * to struct hva_frame *
+ */
+#define to_hva_frame(vb) \
+ container_of(vb, struct hva_frame, vbuf)
+
+/**
+ * struct hva_stream - hva stream buffer (capture)
+ *
+ * @v4l2: video buffer information for V4L2
+ * @list: V4L2 m2m list that the frame belongs to
+ * @paddr: physical address (for hardware)
+ * @vaddr: virtual address (kernel can read/write)
+ * @prepared: true if vaddr/paddr are resolved
+ * @size: size of the buffer in bytes
+ * @bytesused: number of bytes occupied by data in the buffer
+ */
+struct hva_stream {
+ struct vb2_v4l2_buffer vbuf;
+ struct list_head list;
+ dma_addr_t paddr;
+ void *vaddr;
+ bool prepared;
+ unsigned int size;
+ unsigned int bytesused;
+};
+
+/*
+ * to_hva_stream() - cast struct vb2_v4l2_buffer * to struct hva_stream *
+ */
+#define to_hva_stream(vb) \
+ container_of(vb, struct hva_stream, vbuf)
+
+struct hva_dev;
+struct hva_enc;
+
+/**
+ * struct hva_ctx - context of hva instance
+ *
+ * @hva_dev: the device that this instance is associated with
+ * @fh: V4L2 file handle
+ * @ctrl_handler: V4L2 controls handler
+ * @ctrls: hva controls set
+ * @id: instance identifier
+ * @aborting: true if current job aborted
+ * @name: instance name (debug purpose)
+ * @run_work: encode work
+ * @lock: mutex used to lock access of this context
+ * @flags: validity of streaminfo and frameinfo fields
+ * @frame_num: frame number
+ * @stream_num: stream number
+ * @max_stream_size: maximum size in bytes required for stream data
+ * @colorspace: colorspace identifier
+ * @xfer_func: transfer function identifier
+ * @ycbcr_enc: Y'CbCr encoding identifier
+ * @quantization: quantization identifier
+ * @streaminfo: stream properties
+ * @frameinfo: frame properties
+ * @enc: current encoder
+ * @priv: private codec data for this instance, allocated
+ * by encoder @open time
+ * @hw_err: true if hardware error detected
+ */
+struct hva_ctx {
+ struct hva_dev *hva_dev;
+ struct v4l2_fh fh;
+ struct v4l2_ctrl_handler ctrl_handler;
+ struct hva_controls ctrls;
+ u8 id;
+ bool aborting;
+ char name[100];
+ struct work_struct run_work;
+ /* mutex protecting this data structure */
+ struct mutex lock;
+ u32 flags;
+ u32 frame_num;
+ u32 stream_num;
+ u32 max_stream_size;
+ enum v4l2_colorspace colorspace;
+ enum v4l2_xfer_func xfer_func;
+ enum v4l2_ycbcr_encoding ycbcr_enc;
+ enum v4l2_quantization quantization;
+ struct hva_streaminfo streaminfo;
+ struct hva_frameinfo frameinfo;
+ struct hva_enc *enc;
+ void *priv;
+ bool hw_err;
+};
+
+#define HVA_FLAG_STREAMINFO 0x0001
+#define HVA_FLAG_FRAMEINFO 0x0002
+
+#define HVA_MAX_INSTANCES 16
+#define HVA_MAX_ENCODERS 10
+#define HVA_MAX_FORMATS HVA_MAX_ENCODERS
+
+/**
+ * struct hva_dev - abstraction for hva entity
+ *
+ * @v4l2_dev: V4L2 device
+ * @vdev: video device
+ * @pdev: platform device
+ * @dev: device
+ * @lock: mutex used for critical sections & V4L2 ops
+ * serialization
+ * @m2m_dev: memory-to-memory V4L2 device information
+ * @instances: opened instances
+ * @nb_of_instances: number of opened instances
+ * @instance_id: rolling counter identifying an instance (debug purpose)
+ * @regs: register io memory access
+ * @esram_addr: esram address
+ * @esram_size: esram size
+ * @clk: hva clock
+ * @irq_its: status interruption
+ * @irq_err: error interruption
+ * @work_queue: work queue to handle the encode jobs
+ * @protect_mutex: mutex used to lock access of hardware
+ * @interrupt: completion interrupt
+ * @ip_version: IP hardware version
+ * @encoders: registered encoders
+ * @nb_of_encoders: number of registered encoders
+ * @pixelformats: supported uncompressed video formats
+ * @nb_of_pixelformats: number of supported umcompressed video formats
+ * @streamformats: supported compressed video formats
+ * @nb_of_streamformats: number of supported compressed video formats
+ * @sfl_reg: status fifo level register value
+ * @sts_reg: status register value
+ * @lmi_err_reg: local memory interface error register value
+ * @emi_err_reg: external memory interface error register value
+ * @hec_mif_err_reg: HEC memory interface error register value
+ */
+struct hva_dev {
+ struct v4l2_device v4l2_dev;
+ struct video_device *vdev;
+ struct platform_device *pdev;
+ struct device *dev;
+ /* mutex protecting vb2_queue structure */
+ struct mutex lock;
+ struct v4l2_m2m_dev *m2m_dev;
+ struct hva_ctx *instances[HVA_MAX_INSTANCES];
+ unsigned int nb_of_instances;
+ unsigned int instance_id;
+ void __iomem *regs;
+ u32 esram_addr;
+ u32 esram_size;
+ struct clk *clk;
+ int irq_its;
+ int irq_err;
+ struct workqueue_struct *work_queue;
+ /* mutex protecting hardware access */
+ struct mutex protect_mutex;
+ struct completion interrupt;
+ unsigned long int ip_version;
+ const struct hva_enc *encoders[HVA_MAX_ENCODERS];
+ u32 nb_of_encoders;
+ u32 pixelformats[HVA_MAX_FORMATS];
+ u32 nb_of_pixelformats;
+ u32 streamformats[HVA_MAX_FORMATS];
+ u32 nb_of_streamformats;
+ u32 sfl_reg;
+ u32 sts_reg;
+ u32 lmi_err_reg;
+ u32 emi_err_reg;
+ u32 hec_mif_err_reg;
+};
+
+/**
+ * struct hva_enc - hva encoder
+ *
+ * @name: encoder name
+ * @streamformat: fourcc code for compressed video format (H.264...)
+ * @pixelformat: fourcc code for uncompressed video format
+ * @max_width: maximum width of frame for this encoder
+ * @max_height: maximum height of frame for this encoder
+ * @open: open encoder
+ * @close: close encoder
+ * @encode: encode a frame (struct hva_frame) in a stream
+ * (struct hva_stream)
+ */
+
+struct hva_enc {
+ const char *name;
+ u32 streamformat;
+ u32 pixelformat;
+ u32 max_width;
+ u32 max_height;
+ int (*open)(struct hva_ctx *ctx);
+ int (*close)(struct hva_ctx *ctx);
+ int (*encode)(struct hva_ctx *ctx, struct hva_frame *frame,
+ struct hva_stream *stream);
+};
+
+#endif /* HVA_H */
--
1.9.1
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