On Fri, Nov 01, 2024 at 06:50:27PM +0800, Yongbang Shi wrote:
From: baihan li <libaihan@xxxxxxxxxx>
Build a dp level that hibmc driver can enable dp by
calling their functions.
Signed-off-by: baihan li <libaihan@xxxxxxxxxx>
Signed-off-by: yongbang shi <shiyongbang@xxxxxxxxxx>
---
ChangeLog:
v2 -> v3:
- fix build errors reported by kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202410250931.UDQ9s66H-lkp@xxxxxxxxx/
v1 -> v2:
- changed some defines and functions to former patch, suggested by Dmitry Baryshkov.
- sorting the headers including in dp_hw.h and hibmc_drm_drv.c files, suggested by Dmitry Baryshkov.
- deleting struct dp_mode and dp_mode_cfg function, suggested by Dmitry Baryshkov.
- fix build errors reported by kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202410040328.VeVxM9yB-lkp@xxxxxxxxx/
v1:https://lore.kernel.org/all/20240930100610.782363-1-shiyongbang@xxxxxxxxxx/
---
drivers/gpu/drm/hisilicon/hibmc/Makefile | 2 +-
drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.c | 237 ++++++++++++++++++++
drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.h | 31 +++
drivers/gpu/drm/hisilicon/hibmc/dp/dp_reg.h | 41 ++++
4 files changed, 310 insertions(+), 1 deletion(-)
create mode 100644 drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.c
create mode 100644 drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.h
diff --git a/drivers/gpu/drm/hisilicon/hibmc/Makefile b/drivers/gpu/drm/hisilicon/hibmc/Makefile
index 94d77da88bbf..214228052ccf 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/Makefile
+++ b/drivers/gpu/drm/hisilicon/hibmc/Makefile
@@ -1,5 +1,5 @@
# SPDX-License-Identifier: GPL-2.0-only
hibmc-drm-y := hibmc_drm_drv.o hibmc_drm_de.o hibmc_drm_vdac.o hibmc_drm_i2c.o \
- dp/dp_aux.o dp/dp_link.o
+ dp/dp_aux.o dp/dp_link.o dp/dp_hw.o
obj-$(CONFIG_DRM_HISI_HIBMC) += hibmc-drm.o
diff --git a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.c b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.c
new file mode 100644
index 000000000000..214897798bdb
--- /dev/null
+++ b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.c
@@ -0,0 +1,237 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright (c) 2024 Hisilicon Limited.
+
+#include <linux/io.h>
+#include <linux/delay.h>
+#include "dp_config.h"
+#include "dp_comm.h"
+#include "dp_reg.h"
+#include "dp_hw.h"
+#include "dp_link.h"
+#include "dp_aux.h"
+
+static int hibmc_dp_link_init(struct dp_dev *dp)
+{
+ dp->link.cap.lanes = 2;
+ dp->link.train_set = devm_kzalloc(dp->dev->dev,
+ dp->link.cap.lanes * sizeof(u8), GFP_KERNEL);
Can you replace it just with an array, removing a need for an additional
allocation?
+ if (!dp->link.train_set)
+ return -ENOMEM;
+
+ dp->link.cap.link_rate = 1;
Ok, this is why I don't link using indices for link rates. Which rate is
this? Unlike cap.lanes this is pure magic number. I think it should be
handled other way around: store actual link rate and convert to the
register value when required.
+
+ return 0;
+}
+
+static void hibmc_dp_set_tu(struct dp_dev *dp, struct drm_display_mode *mode)
+{
+ u32 tu_symbol_frac_size;
+ u32 tu_symbol_size;
+ u32 rate_ks;
+ u8 lane_num;
+ u32 value;
+ u32 bpp;
+
+ lane_num = dp->link.cap.lanes;
+ if (lane_num == 0) {
+ drm_err(dp->dev, "set tu failed, lane num cannot be 0!\n");
+ return;
+ }
+
+ bpp = DP_BPP;
Where is this defined? Is it hibmc-specific or a generic value?
+ rate_ks = hibmc_dp_get_link_rate(dp->link.cap.link_rate) * DP_LINK_RATE_CAL;
same question
+ value = (mode->clock * bpp * 5) / (61 * lane_num * rate_ks);
+
+ if (value % 10 == 9) { /* 9 carry */
+ tu_symbol_size = value / 10 + 1;
+ tu_symbol_frac_size = 0;
+ } else {
+ tu_symbol_size = value / 10;
+ tu_symbol_frac_size = value % 10 + 1;
+ }
+
+ drm_info(dp->dev, "tu value: %u.%u value: %u\n",
+ tu_symbol_size, tu_symbol_frac_size, value);
+
+ dp_reg_write_field(dp->base + DP_VIDEO_PACKET,
+ DP_CFG_STREAM_TU_SYMBOL_SIZE, tu_symbol_size);
+ dp_reg_write_field(dp->base + DP_VIDEO_PACKET,
+ DP_CFG_STREAM_TU_SYMBOL_FRAC_SIZE, tu_symbol_frac_size);
+}
+
+static void hibmc_dp_set_sst(struct dp_dev *dp, struct drm_display_mode *mode)
+{
+ u32 hblank_size;
+ u32 htotal_size;
+ u32 htotal_int;
+ u32 hblank_int;
+ u32 fclk; /* flink_clock */
+
+ fclk = hibmc_dp_get_link_rate(dp->link.cap.link_rate) * DP_LINK_RATE_CAL;
+
+ /* ssc: 9947 / 10000 = 0.9947 */
This is obvious. More interesting question might be what exactly is
0.9947 (or 0.53 %).
+ htotal_int = mode->htotal * 9947 / 10000;
+ htotal_size = (u32)(htotal_int * fclk / (DP_SYMBOL_PER_FCLK * (mode->clock / 1000)));
Drop u32 ?
+
+ /* ssc: max effect bandwidth 53 / 10000 = 0.53% */
+ hblank_int = (mode->htotal - mode->hdisplay) - mode->hdisplay * 53 / 10000;
+ hblank_size = hblank_int * fclk * 9947 /
+ (mode->clock * 10 * DP_SYMBOL_PER_FCLK);
+
+ drm_info(dp->dev, "h_active %u v_active %u htotal_size %u hblank_size %u",
+ mode->hdisplay, mode->vdisplay, htotal_size, hblank_size);
+ drm_info(dp->dev, "flink_clock %u pixel_clock %d", fclk, (mode->clock / 1000));
+
+ dp_reg_write_field(dp->base + DP_VIDEO_HORIZONTAL_SIZE,
+ DP_CFG_STREAM_HTOTAL_SIZE, htotal_size);
+ dp_reg_write_field(dp->base + DP_VIDEO_HORIZONTAL_SIZE,
+ DP_CFG_STREAM_HBLANK_SIZE, hblank_size);
+}
+
+static void hibmc_dp_link_cfg(struct dp_dev *dp, struct drm_display_mode *mode)
+{
+ u32 timing_delay;
+ u32 vblank;
+ u32 hstart;
+ u32 vstart;
+
+ vblank = mode->vtotal - mode->vdisplay;
+ timing_delay = mode->htotal - mode->hsync_start;
+ hstart = mode->htotal - mode->hsync_start;
+ vstart = mode->vtotal - mode->vsync_start;
+
+ dp_reg_write_field(dp->base + DP_TIMING_GEN_CONFIG0,
+ DP_CFG_TIMING_GEN0_HBLANK, (mode->htotal - mode->hdisplay));
+ dp_reg_write_field(dp->base + DP_TIMING_GEN_CONFIG0,
+ DP_CFG_TIMING_GEN0_HACTIVE, mode->hdisplay);
+
+ dp_reg_write_field(dp->base + DP_TIMING_GEN_CONFIG2,
+ DP_CFG_TIMING_GEN0_VBLANK, vblank);
+ dp_reg_write_field(dp->base + DP_TIMING_GEN_CONFIG2,
+ DP_CFG_TIMING_GEN0_VACTIVE, mode->vdisplay);
+ dp_reg_write_field(dp->base + DP_TIMING_GEN_CONFIG3,
+ DP_CFG_TIMING_GEN0_VFRONT_PORCH, (mode->vsync_start - mode->vdisplay));
+
+ dp_reg_write_field(dp->base + DP_VIDEO_CONFIG0,
+ DP_CFG_STREAM_HACTIVE, mode->hdisplay);
+ dp_reg_write_field(dp->base + DP_VIDEO_CONFIG0,
+ DP_CFG_STREAM_HBLANK, (mode->htotal - mode->hdisplay));
+ dp_reg_write_field(dp->base + DP_VIDEO_CONFIG2,
+ DP_CFG_STREAM_HSYNC_WIDTH, (mode->hsync_end - mode->hsync_start));
+
+ dp_reg_write_field(dp->base + DP_VIDEO_CONFIG1,
+ DP_CFG_STREAM_VACTIVE, mode->vdisplay);
+ dp_reg_write_field(dp->base + DP_VIDEO_CONFIG1,
+ DP_CFG_STREAM_VBLANK, vblank);
+ dp_reg_write_field(dp->base + DP_VIDEO_CONFIG3,
+ DP_CFG_STREAM_VFRONT_PORCH, (mode->vsync_start - mode->vdisplay));
+ dp_reg_write_field(dp->base + DP_VIDEO_CONFIG3,
+ DP_CFG_STREAM_VSYNC_WIDTH, (mode->vsync_end - mode->vsync_start));
+
+ dp_reg_write_field(dp->base + DP_VIDEO_MSA0,
+ DP_CFG_STREAM_VSTART, vstart);
+ dp_reg_write_field(dp->base + DP_VIDEO_MSA0,
+ DP_CFG_STREAM_HSTART, hstart);
+
+ dp_reg_write_field(dp->base + DP_VIDEO_CTRL, DP_CFG_STREAM_VSYNC_POLARITY,
+ mode->flags & DRM_MODE_FLAG_PVSYNC ? 1 : 0);
+ dp_reg_write_field(dp->base + DP_VIDEO_CTRL, DP_CFG_STREAM_HSYNC_POLARITY,
+ mode->flags & DRM_MODE_FLAG_PHSYNC ? 1 : 0);
+
+ /* MSA mic 0 and 1 */
+ writel(DP_MSA1, dp->base + DP_VIDEO_MSA1);
+ writel(DP_MSA2, dp->base + DP_VIDEO_MSA2);
+
+ hibmc_dp_set_tu(dp, mode);
+
+ dp_reg_write_field(dp->base + DP_VIDEO_CTRL, DP_CFG_STREAM_RGB_ENABLE, 0x1);
+ dp_reg_write_field(dp->base + DP_VIDEO_CTRL, DP_CFG_STREAM_VIDEO_MAPPING, 0);
+
+ /* divide 2: up even */
+ if (timing_delay % 2)
+ timing_delay++;
+
+ dp_reg_write_field(dp->base + DP_TIMING_MODEL_CTRL,
+ DP_CFG_PIXEL_NUM_TIMING_MODE_SEL1, timing_delay);
+
+ hibmc_dp_set_sst(dp, mode);
+}
+
+int hibmc_dp_hw_init(struct hibmc_dp *dp)
+{
+ struct drm_device *drm_dev = dp->drm_dev;
+ struct dp_dev *dp_dev;
+ int ret;
+
+ dp_dev = devm_kzalloc(drm_dev->dev, sizeof(struct dp_dev), GFP_KERNEL);
+ if (!dp_dev)
+ return -ENOMEM;
+
+ dp->dp_dev = dp_dev;
+
+ dp_dev->dev = drm_dev;
+ dp_dev->base = dp->mmio + DP_OFFSET;
+
+ hibmc_dp_aux_init(dp_dev);
+
+ ret = hibmc_dp_link_init(dp_dev);
+ if (ret) {
+ drm_err(drm_dev, "dp link init failed\n");
+ return ret;
+ }
+
+ /* hdcp data */
+ writel(DP_HDCP, dp_dev->base + DP_HDCP_CFG);
+ /* int init */
+ writel(0, dp_dev->base + DP_INTR_ENABLE);
+ writel(DP_INT_RST, dp_dev->base + DP_INTR_ORIGINAL_STATUS);
+ /* rst */
+ writel(DP_DPTX_RST, dp_dev->base + DP_DPTX_RST_CTRL);
+ /* clock enable */
+ writel(DP_CLK_EN, dp_dev->base + DP_DPTX_CLK_CTRL);
+
+ return 0;
+}
+
+void hibmc_dp_hw_uninit(struct hibmc_dp *dp)
+{
+ // keep this uninit interface in the future use
no reason to, introduce it when required, not the other way around
+}
+
+void hibmc_dp_display_en(struct hibmc_dp *dp, bool enable)
+{
+ struct dp_dev *dp_dev = dp->dp_dev;
+
+ if (enable) {
+ dp_reg_write_field(dp_dev->base + DP_VIDEO_CTRL, BIT(0), 0x1);
+ writel(DP_SYNC_EN_MASK, dp_dev->base + DP_TIMING_SYNC_CTRL);
+ dp_reg_write_field(dp_dev->base + DP_DPTX_GCTL0, BIT(10), 0x1);
+ writel(DP_SYNC_EN_MASK, dp_dev->base + DP_TIMING_SYNC_CTRL);
+ } else {
+ dp_reg_write_field(dp_dev->base + DP_DPTX_GCTL0, BIT(10), 0);
+ writel(DP_SYNC_EN_MASK, dp_dev->base + DP_TIMING_SYNC_CTRL);
+ dp_reg_write_field(dp_dev->base + DP_VIDEO_CTRL, BIT(0), 0);
+ writel(DP_SYNC_EN_MASK, dp_dev->base + DP_TIMING_SYNC_CTRL);
+ }
+
+ msleep(50);
+}
+
+int hibmc_dp_mode_set(struct hibmc_dp *dp, struct drm_display_mode *mode)
+{
+ struct dp_dev *dp_dev = dp->dp_dev;
+ int ret;
+
+ if (!dp_dev->link.status.channel_equalized) {
+ ret = hibmc_dp_link_training(dp_dev);
+ if (ret) {
+ drm_err(dp->drm_dev, "dp link training failed, ret: %d\n", ret);
+ return ret;
+ }
+ }
+
+ hibmc_dp_display_en(dp, false);
+ hibmc_dp_link_cfg(dp_dev, mode);
+
+ return 0;
+}
diff --git a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.h b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.h
new file mode 100644
index 000000000000..de802aaa8b4a
--- /dev/null
+++ b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.h
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Copyright (c) 2024 Hisilicon Limited. */
+
+#ifndef DP_KAPI_H
+#define DP_KAPI_H
+
+#include <linux/types.h>
+#include <linux/delay.h>
+
+#include <drm/drm_device.h>
+#include <drm/drm_encoder.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_print.h>
+#include <video/videomode.h>
+
+struct dp_dev;
hibmc_dp_dev
+
+struct hibmc_dp {
+ struct dp_dev *dp_dev;
+ struct drm_device *drm_dev;
+ struct drm_encoder encoder;
+ struct drm_connector connector;
+ void __iomem *mmio;
+};
+
+int hibmc_dp_hw_init(struct hibmc_dp *dp);
+void hibmc_dp_hw_uninit(struct hibmc_dp *dp);
+int hibmc_dp_mode_set(struct hibmc_dp *dp, struct drm_display_mode *mode);
+void hibmc_dp_display_en(struct hibmc_dp *dp, bool enable);
+
+#endif
diff --git a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_reg.h b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_reg.h
index 1032f6cde761..3dcb847057a4 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_reg.h
+++ b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_reg.h
@@ -14,8 +14,26 @@
#define DP_AUX_STATUS 0x78
#define DP_PHYIF_CTRL0 0xa0
#define DP_VIDEO_CTRL 0x100
+#define DP_VIDEO_CONFIG0 0x104
+#define DP_VIDEO_CONFIG1 0x108
+#define DP_VIDEO_CONFIG2 0x10c
+#define DP_VIDEO_CONFIG3 0x110
+#define DP_VIDEO_PACKET 0x114
+#define DP_VIDEO_MSA0 0x118
+#define DP_VIDEO_MSA1 0x11c
+#define DP_VIDEO_MSA2 0x120
+#define DP_VIDEO_HORIZONTAL_SIZE 0X124
+#define DP_TIMING_GEN_CONFIG0 0x26c
+#define DP_TIMING_GEN_CONFIG2 0x274
+#define DP_TIMING_GEN_CONFIG3 0x278
+#define DP_HDCP_CFG 0x600
+#define DP_INTR_ENABLE 0x720
+#define DP_INTR_ORIGINAL_STATUS 0x728
#define DP_DPTX_RST_CTRL 0x700
+#define DP_DPTX_CLK_CTRL 0x704
#define DP_DPTX_GCTL0 0x708
+#define DP_TIMING_MODEL_CTRL 0x884
+#define DP_TIMING_SYNC_CTRL 0xFF0
#define DP_CFG_AUX_SYNC_LEN_SEL BIT(1)
#define DP_CFG_AUX_TIMER_TIMEOUT BIT(2)
@@ -31,5 +49,28 @@
#define DP_CFG_AUX_STATUS GENMASK(11, 4)
#define DP_CFG_SCRAMBLE_EN BIT(0)
#define DP_CFG_PAT_SEL GENMASK(7, 4)
+#define DP_CFG_TIMING_GEN0_HACTIVE GENMASK(31, 16)
+#define DP_CFG_TIMING_GEN0_HBLANK GENMASK(15, 0)
+#define DP_CFG_TIMING_GEN0_VACTIVE GENMASK(31, 16)
+#define DP_CFG_TIMING_GEN0_VBLANK GENMASK(15, 0)
+#define DP_CFG_TIMING_GEN0_VFRONT_PORCH GENMASK(31, 16)
+#define DP_CFG_STREAM_HACTIVE GENMASK(31, 16)
+#define DP_CFG_STREAM_HBLANK GENMASK(15, 0)
+#define DP_CFG_STREAM_HSYNC_WIDTH GENMASK(15, 0)
+#define DP_CFG_STREAM_VACTIVE GENMASK(31, 16)
+#define DP_CFG_STREAM_VBLANK GENMASK(15, 0)
+#define DP_CFG_STREAM_VFRONT_PORCH GENMASK(31, 16)
+#define DP_CFG_STREAM_VSYNC_WIDTH GENMASK(15, 0)
+#define DP_CFG_STREAM_VSTART GENMASK(31, 16)
+#define DP_CFG_STREAM_HSTART GENMASK(15, 0)
+#define DP_CFG_STREAM_VSYNC_POLARITY BIT(8)
+#define DP_CFG_STREAM_HSYNC_POLARITY BIT(7)
+#define DP_CFG_STREAM_RGB_ENABLE BIT(1)
+#define DP_CFG_STREAM_VIDEO_MAPPING GENMASK(5, 2)
+#define DP_CFG_PIXEL_NUM_TIMING_MODE_SEL1 GENMASK(31, 16)
+#define DP_CFG_STREAM_TU_SYMBOL_SIZE GENMASK(5, 0)
+#define DP_CFG_STREAM_TU_SYMBOL_FRAC_SIZE GENMASK(9, 6)
+#define DP_CFG_STREAM_HTOTAL_SIZE GENMASK(31, 16)
+#define DP_CFG_STREAM_HBLANK_SIZE GENMASK(15, 0)
#endif
--
2.33.0
