Add new driver for the MXSFB controller found in i.MX23/28/6SX .
The MXSFB controller is a simple framebuffer controller with one
parallel LCD output. Unlike the MXSFB fbdev driver that is used
on these systems now, this driver uses the DRM/KMS framework.
Signed-off-by: Marek Vasut <marex@xxxxxxx>
Cc: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
Cc: Fabio Estevam <fabio.estevam@xxxxxxx>
Cc: Shawn Guo <shawnguo@xxxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
--
V2: - Use drm_simple_kms_helper to reduce amount of common code
- Add dedicated OF compatible for i.MX6SX
V3: - Update to latest next/master
---
MAINTAINERS | 6 +
drivers/gpu/drm/Kconfig | 2 +
drivers/gpu/drm/Makefile | 1 +
drivers/gpu/drm/mxsfb/Kconfig | 18 ++
drivers/gpu/drm/mxsfb/Makefile | 2 +
drivers/gpu/drm/mxsfb/mxsfb_crtc.c | 241 ++++++++++++++++++++
drivers/gpu/drm/mxsfb/mxsfb_drv.c | 444 +++++++++++++++++++++++++++++++++++++
drivers/gpu/drm/mxsfb/mxsfb_drv.h | 54 +++++
drivers/gpu/drm/mxsfb/mxsfb_out.c | 131 +++++++++++
drivers/gpu/drm/mxsfb/mxsfb_regs.h | 114 ++++++++++
10 files changed, 1013 insertions(+)
create mode 100644 drivers/gpu/drm/mxsfb/Kconfig
create mode 100644 drivers/gpu/drm/mxsfb/Makefile
create mode 100644 drivers/gpu/drm/mxsfb/mxsfb_crtc.c
create mode 100644 drivers/gpu/drm/mxsfb/mxsfb_drv.c
create mode 100644 drivers/gpu/drm/mxsfb/mxsfb_drv.h
create mode 100644 drivers/gpu/drm/mxsfb/mxsfb_out.c
create mode 100644 drivers/gpu/drm/mxsfb/mxsfb_regs.h
diff --git a/MAINTAINERS b/MAINTAINERS
index 3f3f60b..f32b5df 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8339,6 +8339,12 @@ T: git git://linuxtv.org/mkrufky/tuners.git
S: Maintained
F: drivers/media/tuners/mxl5007t.*
+MXSFB DRM DRIVER
+M: Marek Vasut <marex@xxxxxxx>
+S: Supported
+F: drivers/gpu/drm/mxsfb/
+F: Documentation/devicetree/bindings/display/mxsfb-drm.txt
+
MYRICOM MYRI-10G 10GbE DRIVER (MYRI10GE)
M: Hyong-Youb Kim <hykim@xxxxxxxx>
L: netdev@xxxxxxxxxxxxxxx
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 863cdca..fbcb984 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -239,6 +239,8 @@ source "drivers/gpu/drm/mediatek/Kconfig"
source "drivers/gpu/drm/zte/Kconfig"
+source "drivers/gpu/drm/mxsfb/Kconfig"
+
# Keep legacy drivers last
menuconfig DRM_LEGACY
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index f217274..ac5e115 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -88,3 +88,4 @@ obj-$(CONFIG_DRM_ETNAVIV) += etnaviv/
obj-$(CONFIG_DRM_ARCPGU)+= arc/
obj-y += hisilicon/
obj-$(CONFIG_DRM_ZTE) += zte/
+obj-$(CONFIG_DRM_MXSFB) += mxsfb/
diff --git a/drivers/gpu/drm/mxsfb/Kconfig b/drivers/gpu/drm/mxsfb/Kconfig
new file mode 100644
index 0000000..0b6cb59
--- /dev/null
+++ b/drivers/gpu/drm/mxsfb/Kconfig
@@ -0,0 +1,18 @@
+config DRM_MXS
+ bool
+ help
+ Choose this option to select drivers for MXS FB devices
+
+config DRM_MXSFB
+ tristate "i.MX23/i.MX28/i.MX6SX MXSFB LCD controller"
+ depends on DRM && OF
+ depends on COMMON_CLK
+ select DRM_MXS
+ select DRM_KMS_HELPER
+ select DRM_KMS_FB_HELPER
+ select DRM_KMS_CMA_HELPER
+ help
+ Choose this option if you have an i.MX23/i.MX28/i.MX6SX MXSFB
+ LCD controller.
+
+ If M is selected the module will be called mxsfb.
diff --git a/drivers/gpu/drm/mxsfb/Makefile b/drivers/gpu/drm/mxsfb/Makefile
new file mode 100644
index 0000000..857f3a4
--- /dev/null
+++ b/drivers/gpu/drm/mxsfb/Makefile
@@ -0,0 +1,2 @@
+mxsfb-y := mxsfb_drv.o mxsfb_crtc.o mxsfb_out.o
+obj-$(CONFIG_DRM_MXSFB) += mxsfb.o
diff --git a/drivers/gpu/drm/mxsfb/mxsfb_crtc.c b/drivers/gpu/drm/mxsfb/mxsfb_crtc.c
new file mode 100644
index 0000000..0818903
--- /dev/null
+++ b/drivers/gpu/drm/mxsfb/mxsfb_crtc.c
@@ -0,0 +1,241 @@
+/*
+ * Copyright (C) 2016 Marek Vasut <marex@xxxxxxx>
+ *
+ * This code is based on drivers/video/fbdev/mxsfb.c :
+ * Copyright (C) 2010 Juergen Beisert, Pengutronix
+ * Copyright (C) 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright (C) 2008 Embedded Alley Solutions, Inc All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_of.h>
+#include <drm/drm_plane_helper.h>
+#include <drm/drm_simple_kms_helper.h>
+#include <linux/clk.h>
+#include <linux/iopoll.h>
+#include <linux/of_graph.h>
+#include <linux/platform_data/simplefb.h>
+#include <video/videomode.h>
+
+#include "mxsfb_drv.h"
+#include "mxsfb_regs.h"
+
+static u32 set_hsync_pulse_width(struct mxsfb_drm_private *mxsfb, u32 val)
+{
+ return (val & mxsfb->devdata->hs_wdth_mask) <<
+ mxsfb->devdata->hs_wdth_shift;
+}
+
+/* Setup the MXSFB registers for decoding the pixels out of the framebuffer */
+static int mxsfb_set_pixel_fmt(struct mxsfb_drm_private *mxsfb)
+{
+ struct drm_crtc *crtc = &mxsfb->pipe.crtc;
+ struct drm_device *drm = crtc->dev;
+ const u32 format = crtc->primary->state->fb->pixel_format;
+ u32 ctrl, ctrl1;
+
+ ctrl = CTRL_BYPASS_COUNT | CTRL_MASTER;
+
+ /*
+ * WARNING: The bus width, CTRL_SET_BUS_WIDTH(), is configured to
+ * match the selected mode here. This differs from the original
+ * MXSFB driver, which had the option to configure the bus width
+ * to arbitrary value. This limitation should not pose an issue.
+ */
+
+ /* CTRL1 contains IRQ config and status bits, preserve those. */
+ ctrl1 = readl(mxsfb->base + LCDC_CTRL1);
+ ctrl1 &= CTRL1_CUR_FRAME_DONE_IRQ_EN | CTRL1_CUR_FRAME_DONE_IRQ;
+
+ switch (format) {
+ case DRM_FORMAT_RGB565:
+ dev_dbg(drm->dev, "Setting up RGB565 mode\n");
+ ctrl |= CTRL_SET_BUS_WIDTH(STMLCDIF_16BIT);
+ ctrl |= CTRL_SET_WORD_LENGTH(0);
+ ctrl1 |= CTRL1_SET_BYTE_PACKAGING(0xf);
+ break;
+ case DRM_FORMAT_XRGB8888:
+ dev_dbg(drm->dev, "Setting up XRGB8888 mode\n");
+ ctrl |= CTRL_SET_BUS_WIDTH(STMLCDIF_24BIT);
+ ctrl |= CTRL_SET_WORD_LENGTH(3);
+ /* Do not use packed pixels = one pixel per word instead. */
+ ctrl1 |= CTRL1_SET_BYTE_PACKAGING(0x7);
+ break;
+ default:
+ dev_err(drm->dev, "Unhandled pixel format %08x\n", format);
+ return -EINVAL;
+ }
+
+ writel(ctrl1, mxsfb->base + LCDC_CTRL1);
+ writel(ctrl, mxsfb->base + LCDC_CTRL);
+
+ return 0;
+}
+
+static void mxsfb_enable_controller(struct mxsfb_drm_private *mxsfb)
+{
+ u32 reg;
+
+ if (mxsfb->clk_disp_axi)
+ clk_prepare_enable(mxsfb->clk_disp_axi);
+ clk_prepare_enable(mxsfb->clk);
+ mxsfb_enable_axi_clk(mxsfb);
+
+ /* If it was disabled, re-enable the mode again */
+ writel(CTRL_DOTCLK_MODE, mxsfb->base + LCDC_CTRL + REG_SET);
+
+ /* Enable the SYNC signals first, then the DMA engine */
+ reg = readl(mxsfb->base + LCDC_VDCTRL4);
+ reg |= VDCTRL4_SYNC_SIGNALS_ON;
+ writel(reg, mxsfb->base + LCDC_VDCTRL4);
+
+ writel(CTRL_RUN, mxsfb->base + LCDC_CTRL + REG_SET);
+}
+
+static void mxsfb_disable_controller(struct mxsfb_drm_private *mxsfb)
+{
+ u32 reg;
+
+ /*
+ * Even if we disable the controller here, it will still continue
+ * until its FIFOs are running out of data
+ */
+ writel(CTRL_DOTCLK_MODE, mxsfb->base + LCDC_CTRL + REG_CLR);
+
+ readl_poll_timeout(mxsfb->base + LCDC_CTRL, reg, !(reg & CTRL_RUN),
+ 0, 1000);
+
+ reg = readl(mxsfb->base + LCDC_VDCTRL4);
+ reg &= ~VDCTRL4_SYNC_SIGNALS_ON;
+ writel(reg, mxsfb->base + LCDC_VDCTRL4);
+
+ mxsfb_disable_axi_clk(mxsfb);
+
+ clk_disable_unprepare(mxsfb->clk);
+ if (mxsfb->clk_disp_axi)
+ clk_disable_unprepare(mxsfb->clk_disp_axi);
+}
+
+static void mxsfb_crtc_mode_set_nofb(struct mxsfb_drm_private *mxsfb)
+{
+ struct drm_display_mode *m = &mxsfb->pipe.crtc.state->adjusted_mode;
+ const u32 bus_flags = mxsfb->connector.display_info.bus_flags;
+ u32 vdctrl0, vsync_pulse_len, hsync_pulse_len;
+ int err;
+
+ /*
+ * It seems, you can't re-program the controller if it is still
+ * running. This may lead to shifted pictures (FIFO issue?), so
+ * first stop the controller and drain its FIFOs.
+ */
+ mxsfb_enable_axi_clk(mxsfb);
+
+ /* Clear the FIFOs */
+ writel(CTRL1_FIFO_CLEAR, mxsfb->base + LCDC_CTRL1 + REG_SET);
+
+ err = mxsfb_set_pixel_fmt(mxsfb);
+ if (err)
+ return;
+
+ clk_set_rate(mxsfb->clk, m->crtc_clock * 1000);
+
+ writel(TRANSFER_COUNT_SET_VCOUNT(m->crtc_vdisplay) |
+ TRANSFER_COUNT_SET_HCOUNT(m->crtc_hdisplay),
+ mxsfb->base + mxsfb->devdata->transfer_count);
+
+ vsync_pulse_len = m->crtc_vsync_end - m->crtc_vsync_start;
+
+ vdctrl0 = VDCTRL0_ENABLE_PRESENT | /* Always in DOTCLOCK mode */
+ VDCTRL0_VSYNC_PERIOD_UNIT |
+ VDCTRL0_VSYNC_PULSE_WIDTH_UNIT |
+ VDCTRL0_SET_VSYNC_PULSE_WIDTH(vsync_pulse_len);
+ if (m->flags & DRM_MODE_FLAG_PHSYNC)
+ vdctrl0 |= VDCTRL0_HSYNC_ACT_HIGH;
+ if (m->flags & DRM_MODE_FLAG_PVSYNC)
+ vdctrl0 |= VDCTRL0_VSYNC_ACT_HIGH;
+ if (bus_flags & DRM_BUS_FLAG_DE_HIGH)
+ vdctrl0 |= VDCTRL0_ENABLE_ACT_HIGH;
+ if (bus_flags & DRM_BUS_FLAG_PIXDATA_NEGEDGE)
+ vdctrl0 |= VDCTRL0_DOTCLK_ACT_FALLING;
+
+ writel(vdctrl0, mxsfb->base + LCDC_VDCTRL0);
+
+ /* Frame length in lines. */
+ writel(m->crtc_vtotal, mxsfb->base + LCDC_VDCTRL1);
+
+ /* Line length in units of clocks or pixels. */
+ hsync_pulse_len = m->crtc_hsync_end - m->crtc_hsync_start;
+ writel(set_hsync_pulse_width(mxsfb, hsync_pulse_len) |
+ VDCTRL2_SET_HSYNC_PERIOD(m->crtc_htotal),
+ mxsfb->base + LCDC_VDCTRL2);
+
+ writel(SET_HOR_WAIT_CNT(m->crtc_hblank_end - m->crtc_hsync_end) |
+ SET_VERT_WAIT_CNT(m->crtc_vblank_end - m->crtc_vsync_end),
+ mxsfb->base + LCDC_VDCTRL3);
+
+ writel(SET_DOTCLK_H_VALID_DATA_CNT(m->hdisplay),
+ mxsfb->base + LCDC_VDCTRL4);
+
+ mxsfb_disable_axi_clk(mxsfb);
+}
+
+void mxsfb_crtc_enable(struct mxsfb_drm_private *mxsfb)
+{
+ mxsfb_crtc_mode_set_nofb(mxsfb);
+ mxsfb_enable_controller(mxsfb);
+}
+
+void mxsfb_crtc_disable(struct mxsfb_drm_private *mxsfb)
+{
+ mxsfb_disable_controller(mxsfb);
+}
+
+void mxsfb_plane_atomic_update(struct mxsfb_drm_private *mxsfb,
+ struct drm_plane_state *state)
+{
+ struct drm_simple_display_pipe *pipe = &mxsfb->pipe;
+ struct drm_crtc *crtc = &pipe->crtc;
+ struct drm_framebuffer *fb = pipe->plane.state->fb;
+ struct drm_pending_vblank_event *event;
+ struct drm_gem_cma_object *gem;
+
+ if (!crtc)
+ return;
+
+ spin_lock_irq(&crtc->dev->event_lock);
+ event = crtc->state->event;
+ if (event) {
+ crtc->state->event = NULL;
+
+ if (drm_crtc_vblank_get(crtc) == 0) {
+ drm_crtc_arm_vblank_event(crtc, event);
+ } else {
+ drm_crtc_send_vblank_event(crtc, event);
+ }
+ }
+ spin_unlock_irq(&crtc->dev->event_lock);
+
+ if (!fb)
+ return;
+
+ gem = drm_fb_cma_get_gem_obj(fb, 0);
+
+ mxsfb_enable_axi_clk(mxsfb);
+ writel(gem->paddr, mxsfb->base + mxsfb->devdata->next_buf);
+ mxsfb_disable_axi_clk(mxsfb);
+}
diff --git a/drivers/gpu/drm/mxsfb/mxsfb_drv.c b/drivers/gpu/drm/mxsfb/mxsfb_drv.c
new file mode 100644
index 0000000..79a18bf
--- /dev/null
+++ b/drivers/gpu/drm/mxsfb/mxsfb_drv.c
@@ -0,0 +1,444 @@
+/*
+ * Copyright (C) 2016 Marek Vasut <marex@xxxxxxx>
+ *
+ * This code is based on drivers/video/fbdev/mxsfb.c :
+ * Copyright (C) 2010 Juergen Beisert, Pengutronix
+ * Copyright (C) 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright (C) 2008 Embedded Alley Solutions, Inc All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/clk.h>
+#include <linux/component.h>
+#include <linux/list.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/of_reserved_mem.h>
+#include <linux/pm_runtime.h>
+#include <linux/reservation.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_of.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_simple_kms_helper.h>
+
+#include "mxsfb_drv.h"
+#include "mxsfb_regs.h"
+
+enum mxsfb_devtype {
+ MXSFB_V3,
+ MXSFB_V4,
+};
+
+static const struct mxsfb_devdata mxsfb_devdata[] = {
+ [MXSFB_V3] = {
+ .transfer_count = LCDC_V3_TRANSFER_COUNT,
+ .cur_buf = LCDC_V3_CUR_BUF,
+ .next_buf = LCDC_V3_NEXT_BUF,
+ .debug0 = LCDC_V3_DEBUG0,
+ .hs_wdth_mask = 0xff,
+ .hs_wdth_shift = 24,
+ .ipversion = 3,
+ },
+ [MXSFB_V4] = {
+ .transfer_count = LCDC_V4_TRANSFER_COUNT,
+ .cur_buf = LCDC_V4_CUR_BUF,
+ .next_buf = LCDC_V4_NEXT_BUF,
+ .debug0 = LCDC_V4_DEBUG0,
+ .hs_wdth_mask = 0x3fff,
+ .hs_wdth_shift = 18,
+ .ipversion = 4,
+ },
+};
+
+static const uint32_t mxsfb_formats[] = {
+ DRM_FORMAT_XRGB8888,
+ DRM_FORMAT_RGB565
+};
+
+static struct mxsfb_drm_private *
+drm_pipe_to_mxsfb_drm_private(struct drm_simple_display_pipe *pipe)
+{
+ return container_of(pipe, struct mxsfb_drm_private, pipe);
+}
+
+void mxsfb_enable_axi_clk(struct mxsfb_drm_private *mxsfb)
+{
+ if (mxsfb->clk_axi)
+ clk_prepare_enable(mxsfb->clk_axi);
+}
+
+void mxsfb_disable_axi_clk(struct mxsfb_drm_private *mxsfb)
+{
+ if (mxsfb->clk_axi)
+ clk_disable_unprepare(mxsfb->clk_axi);
+}
+
+static const struct drm_mode_config_funcs mxsfb_mode_config_funcs = {
+ .fb_create = drm_fb_cma_create,
+ .atomic_check = drm_atomic_helper_check,
+ .atomic_commit = drm_atomic_helper_commit,
+};
+
+static void mxsfb_pipe_enable(struct drm_simple_display_pipe *pipe,
+ struct drm_crtc_state *crtc_state)
+{
+ struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
+
+ mxsfb_crtc_enable(mxsfb);
+}
+
+static void mxsfb_pipe_disable(struct drm_simple_display_pipe *pipe)
+{
+ struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
+
+ mxsfb_crtc_disable(mxsfb);
+}
+
+static void mxsfb_pipe_update(struct drm_simple_display_pipe *pipe,
+ struct drm_plane_state *plane_state)
+{
+ struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
+
+ mxsfb_plane_atomic_update(mxsfb, plane_state);
+}
+
+static int mxsfb_pipe_prepare_fb(struct drm_simple_display_pipe *pipe,
+ struct drm_plane_state *plane_state)
+{
+ return drm_fb_cma_prepare_fb(&pipe->plane, plane_state);
+}
+
+struct drm_simple_display_pipe_funcs mxsfb_funcs = {
+ .enable = mxsfb_pipe_enable,
+ .disable = mxsfb_pipe_disable,
+ .update = mxsfb_pipe_update,
+ .prepare_fb = mxsfb_pipe_prepare_fb,
+};
+
+static int mxsfb_load(struct drm_device *drm, unsigned long flags)
+{
+ struct platform_device *pdev = to_platform_device(drm->dev);
+ struct mxsfb_drm_private *mxsfb;
+ struct resource *res;
+ int ret;
+
+ mxsfb = devm_kzalloc(&pdev->dev, sizeof(*mxsfb), GFP_KERNEL);
+ if (!mxsfb)
+ return -ENOMEM;
+
+ drm->dev_private = mxsfb;
+ mxsfb->devdata = &mxsfb_devdata[pdev->id_entry->driver_data];
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ mxsfb->base = devm_ioremap_resource(drm->dev, res);
+ if (IS_ERR(mxsfb->base))
+ return PTR_ERR(mxsfb->base);
+
+ mxsfb->clk = devm_clk_get(drm->dev, NULL);
+ if (IS_ERR(mxsfb->clk))
+ return PTR_ERR(mxsfb->clk);
+
+ mxsfb->clk_axi = devm_clk_get(drm->dev, "axi");
+ if (IS_ERR(mxsfb->clk_axi))
+ mxsfb->clk_axi = NULL;
+
+ mxsfb->clk_disp_axi = devm_clk_get(drm->dev, "disp_axi");
+ if (IS_ERR(mxsfb->clk_disp_axi))
+ mxsfb->clk_disp_axi = NULL;
+
+ ret = dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
+
+ pm_runtime_enable(drm->dev);
+
+ ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
+ if (ret < 0) {
+ dev_err(drm->dev, "Failed to initialise vblank\n");
+ goto err_vblank;
+ }
+
+ /* Modeset init */
+ drm_mode_config_init(drm);
+
+ ret = mxsfb_create_output(drm);
+ if (ret < 0) {
+ dev_err(drm->dev, "Failed to create outputs\n");
+ goto err_vblank;
+ }
+
+ ret = drm_simple_display_pipe_init(drm, &mxsfb->pipe, &mxsfb_funcs,
+ mxsfb_formats, ARRAY_SIZE(mxsfb_formats),
+ &mxsfb->connector);
+ if (ret < 0) {
+ dev_err(drm->dev, "Cannot setup simple display pipe\n");
+ goto err_vblank;
+ }
+
+ ret = drm_panel_attach(mxsfb->panel, &mxsfb->connector);
+ if (ret) {
+ dev_err(drm->dev, "Cannot connect panel\n");
+ goto err_vblank;
+ }
+
+ drm->mode_config.min_width = MXSFB_MIN_XRES;
+ drm->mode_config.min_height = MXSFB_MIN_YRES;
+ drm->mode_config.max_width = MXSFB_MAX_XRES;
+ drm->mode_config.max_height = MXSFB_MAX_YRES;
+ drm->mode_config.funcs = &mxsfb_mode_config_funcs;
+
+ drm_mode_config_reset(drm);
+
+ pm_runtime_get_sync(drm->dev);
+ ret = drm_irq_install(drm, platform_get_irq(pdev, 0));
+ pm_runtime_put_sync(drm->dev);
+
+ if (ret < 0) {
+ dev_err(drm->dev, "Failed to install IRQ handler\n");
+ goto err_irq;
+ }
+
+ drm_kms_helper_poll_init(drm);
+
+ mxsfb->fbdev = drm_fbdev_cma_init(drm, 32, drm->mode_config.num_crtc,
+ drm->mode_config.num_connector);
+ if (IS_ERR(mxsfb->fbdev)) {
+ mxsfb->fbdev = NULL;
+ dev_err(drm->dev, "Failed to init FB CMA area\n");
+ goto err_cma;
+ }
+
+ platform_set_drvdata(pdev, drm);
+
+ drm_helper_hpd_irq_event(drm);
+
+ return 0;
+
+err_cma:
+ drm_irq_uninstall(drm);
+err_irq:
+ drm_panel_detach(mxsfb->panel);
+err_vblank:
+ pm_runtime_disable(drm->dev);
+
+ return ret;
+}
+
+static void mxsfb_unload(struct drm_device *drm)
+{
+ struct mxsfb_drm_private *mxsfb = drm->dev_private;
+
+ if (mxsfb->fbdev)
+ drm_fbdev_cma_fini(mxsfb->fbdev);
+
+ drm_kms_helper_poll_fini(drm);
+ drm_mode_config_cleanup(drm);
+ drm_vblank_cleanup(drm);
+
+ pm_runtime_get_sync(drm->dev);
+ drm_irq_uninstall(drm);
+ pm_runtime_put_sync(drm->dev);
+
+ drm->dev_private = NULL;
+
+ pm_runtime_disable(drm->dev);
+}
+
+static void mxsfb_lastclose(struct drm_device *drm)
+{
+ struct mxsfb_drm_private *mxsfb = drm->dev_private;
+
+ drm_fbdev_cma_restore_mode(mxsfb->fbdev);
+}
+
+static int mxsfb_enable_vblank(struct drm_device *drm, unsigned int crtc)
+{
+ struct mxsfb_drm_private *mxsfb = drm->dev_private;
+
+ /* Clear and enable VBLANK IRQ */
+ mxsfb_enable_axi_clk(mxsfb);
+ writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
+ writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_SET);
+ mxsfb_disable_axi_clk(mxsfb);
+
+ return 0;
+}
+
+static void mxsfb_disable_vblank(struct drm_device *drm, unsigned int crtc)
+{
+ struct mxsfb_drm_private *mxsfb = drm->dev_private;
+
+ /* Disable and clear VBLANK IRQ */
+ mxsfb_enable_axi_clk(mxsfb);
+ writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_CLR);
+ writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
+ mxsfb_disable_axi_clk(mxsfb);
+}
+
+static void mxsfb_irq_preinstall(struct drm_device *drm)
+{
+ mxsfb_disable_vblank(drm, 0);
+}
+
+static irqreturn_t mxsfb_irq_handler(int irq, void *data)
+{
+ struct drm_device *drm = data;
+ struct mxsfb_drm_private *mxsfb = drm->dev_private;
+ u32 reg;
+
+ mxsfb_enable_axi_clk(mxsfb);
+
+ reg = readl(mxsfb->base + LCDC_CTRL1);
+
+ if (reg & CTRL1_CUR_FRAME_DONE_IRQ)
+ drm_crtc_handle_vblank(&mxsfb->pipe.crtc);
+
+ writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
+
+ mxsfb_disable_axi_clk(mxsfb);
+
+ return IRQ_HANDLED;
+}
+
+static const struct file_operations fops = {
+ .owner = THIS_MODULE,
+ .open = drm_open,
+ .release = drm_release,
+ .unlocked_ioctl = drm_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = drm_compat_ioctl,
+#endif
+ .poll = drm_poll,
+ .read = drm_read,
+ .llseek = noop_llseek,
+ .mmap = drm_gem_cma_mmap,
+};
+
+static struct drm_driver mxsfb_driver = {
+ .driver_features = DRIVER_GEM | DRIVER_MODESET |
+ DRIVER_PRIME | DRIVER_ATOMIC |
+ DRIVER_HAVE_IRQ,
+ .lastclose = mxsfb_lastclose,
+ .irq_handler = mxsfb_irq_handler,
+ .irq_preinstall = mxsfb_irq_preinstall,
+ .irq_uninstall = mxsfb_irq_preinstall,
+ .get_vblank_counter = drm_vblank_no_hw_counter,
+ .enable_vblank = mxsfb_enable_vblank,
+ .disable_vblank = mxsfb_disable_vblank,
+ .gem_free_object = drm_gem_cma_free_object,
+ .gem_vm_ops = &drm_gem_cma_vm_ops,
+ .dumb_create = drm_gem_cma_dumb_create,
+ .dumb_map_offset = drm_gem_cma_dumb_map_offset,
+ .dumb_destroy = drm_gem_dumb_destroy,
+ .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
+ .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
+ .gem_prime_export = drm_gem_prime_export,
+ .gem_prime_import = drm_gem_prime_import,
+ .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
+ .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
+ .gem_prime_vmap = drm_gem_cma_prime_vmap,
+ .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
+ .gem_prime_mmap = drm_gem_cma_prime_mmap,
+ .fops = &fops,
+ .name = "mxsfb-drm",
+ .desc = "MXSFB Controller DRM",
+ .date = "20160824",
+ .major = 1,
+ .minor = 0,
+};
+
+static const struct platform_device_id mxsfb_devtype[] = {
+ { .name = "imx23-fb", .driver_data = MXSFB_V3, },
+ { .name = "imx28-fb", .driver_data = MXSFB_V4, },
+ { .name = "imx6sx-fb", .driver_data = MXSFB_V4, },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, mxsfb_devtype);
+
+static const struct of_device_id mxsfb_dt_ids[] = {
+ { .compatible = "fsl,imx23-lcdif", .data = &mxsfb_devtype[0], },
+ { .compatible = "fsl,imx28-lcdif", .data = &mxsfb_devtype[1], },
+ { .compatible = "fsl,imx6sx-lcdif", .data = &mxsfb_devtype[2], },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, mxsfb_dt_ids);
+
+static int mxsfb_probe(struct platform_device *pdev)
+{
+ struct drm_device *drm;
+ const struct of_device_id *of_id =
+ of_match_device(mxsfb_dt_ids, &pdev->dev);
+ int ret;
+
+ if (!pdev->dev.of_node)
+ return -ENODEV;
+
+ if (of_id)
+ pdev->id_entry = of_id->data;
+
+ drm = drm_dev_alloc(&mxsfb_driver, &pdev->dev);
+ if (!drm)
+ return -ENOMEM;
+
+ ret = mxsfb_load(drm, 0);
+ if (ret)
+ goto err_free;
+
+ ret = drm_dev_register(drm, 0);
+ if (ret)
+ goto err_unload;
+
+ return 0;
+
+err_unload:
+ mxsfb_unload(drm);
+err_free:
+ drm_dev_unref(drm);
+
+ return ret;
+}
+
+static int mxsfb_remove(struct platform_device *pdev)
+{
+ struct drm_device *drm = platform_get_drvdata(pdev);
+
+ drm_dev_unregister(drm);
+ mxsfb_unload(drm);
+ drm_dev_unref(drm);
+
+ return 0;
+}
+
+static struct platform_driver mxsfb_platform_driver = {
+ .probe = mxsfb_probe,
+ .remove = mxsfb_remove,
+ .id_table = mxsfb_devtype,
+ .driver = {
+ .name = "mxsfb",
+ .of_match_table = mxsfb_dt_ids,
+ },
+};
+
+module_platform_driver(mxsfb_platform_driver);
+
+MODULE_AUTHOR("Marek Vasut <marex@xxxxxxx>");
+MODULE_DESCRIPTION("Freescale MXS DRM/KMS driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/mxsfb/mxsfb_drv.h b/drivers/gpu/drm/mxsfb/mxsfb_drv.h
new file mode 100644
index 0000000..5d0883f
--- /dev/null
+++ b/drivers/gpu/drm/mxsfb/mxsfb_drv.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2016 Marek Vasut <marex@xxxxxxx>
+ *
+ * i.MX23/i.MX28/i.MX6SX MXSFB LCD controller driver.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MXSFB_DRV_H__
+#define __MXSFB_DRV_H__
+
+struct mxsfb_devdata {
+ unsigned int transfer_count;
+ unsigned int cur_buf;
+ unsigned int next_buf;
+ unsigned int debug0;
+ unsigned int hs_wdth_mask;
+ unsigned int hs_wdth_shift;
+ unsigned int ipversion;
+};
+
+struct mxsfb_drm_private {
+ const struct mxsfb_devdata *devdata;
+
+ void __iomem *base; /* registers */
+ struct clk *clk;
+ struct clk *clk_axi;
+ struct clk *clk_disp_axi;
+
+ struct drm_simple_display_pipe pipe;
+ struct drm_connector connector;
+ struct drm_panel *panel;
+ struct drm_fbdev_cma *fbdev;
+};
+
+int mxsfb_setup_crtc(struct drm_device *dev);
+int mxsfb_create_output(struct drm_device *dev);
+
+void mxsfb_enable_axi_clk(struct mxsfb_drm_private *mxsfb);
+void mxsfb_disable_axi_clk(struct mxsfb_drm_private *mxsfb);
+
+void mxsfb_crtc_enable(struct mxsfb_drm_private *mxsfb);
+void mxsfb_crtc_disable(struct mxsfb_drm_private *mxsfb);
+void mxsfb_plane_atomic_update(struct mxsfb_drm_private *mxsfb,
+ struct drm_plane_state *state);
+
+#endif /* __MXSFB_DRV_H__ */
diff --git a/drivers/gpu/drm/mxsfb/mxsfb_out.c b/drivers/gpu/drm/mxsfb/mxsfb_out.c
new file mode 100644
index 0000000..fa8d173
--- /dev/null
+++ b/drivers/gpu/drm/mxsfb/mxsfb_out.c
@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2016 Marek Vasut <marex@xxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/of_graph.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_plane_helper.h>
+#include <drm/drm_simple_kms_helper.h>
+#include <drm/drmP.h>
+
+#include "mxsfb_drv.h"
+
+static struct mxsfb_drm_private *
+drm_connector_to_mxsfb_drm_private(struct drm_connector *connector)
+{
+ return container_of(connector, struct mxsfb_drm_private, connector);
+}
+
+static int mxsfb_panel_get_modes(struct drm_connector *connector)
+{
+ struct mxsfb_drm_private *mxsfb =
+ drm_connector_to_mxsfb_drm_private(connector);
+
+ if (mxsfb->panel)
+ return mxsfb->panel->funcs->get_modes(mxsfb->panel);
+
+ return 0;
+}
+
+static const struct
+drm_connector_helper_funcs mxsfb_panel_connector_helper_funcs = {
+ .get_modes = mxsfb_panel_get_modes,
+};
+
+static enum drm_connector_status
+mxsfb_panel_connector_detect(struct drm_connector *connector, bool force)
+{
+ struct mxsfb_drm_private *mxsfb =
+ drm_connector_to_mxsfb_drm_private(connector);
+
+ if (mxsfb->panel)
+ return connector_status_connected;
+
+ return connector_status_disconnected;
+}
+
+static void mxsfb_panel_connector_destroy(struct drm_connector *connector)
+{
+ struct mxsfb_drm_private *mxsfb =
+ drm_connector_to_mxsfb_drm_private(connector);
+
+ if (mxsfb->panel)
+ drm_panel_detach(mxsfb->panel);
+
+ drm_connector_unregister(connector);
+ drm_connector_cleanup(connector);
+}
+
+static const struct drm_connector_funcs mxsfb_panel_connector_funcs = {
+ .dpms = drm_atomic_helper_connector_dpms,
+ .detect = mxsfb_panel_connector_detect,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .destroy = mxsfb_panel_connector_destroy,
+ .reset = drm_atomic_helper_connector_reset,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int mxsfb_attach_endpoint(struct drm_device *drm,
+ const struct of_endpoint *ep)
+{
+ struct mxsfb_drm_private *mxsfb = drm->dev_private;
+ struct device_node *np;
+ struct drm_panel *panel;
+ int ret = -EPROBE_DEFER;
+
+ np = of_graph_get_remote_port_parent(ep->local_node);
+ panel = of_drm_find_panel(np);
+ of_node_put(np);
+
+ if (!panel)
+ return -EPROBE_DEFER;
+
+ mxsfb->connector.dpms = DRM_MODE_DPMS_OFF;
+ mxsfb->connector.polled = 0;
+ drm_connector_helper_add(&mxsfb->connector,
+ &mxsfb_panel_connector_helper_funcs);
+ ret = drm_connector_init(drm, &mxsfb->connector,
+ &mxsfb_panel_connector_funcs,
+ DRM_MODE_CONNECTOR_Unknown);
+ if (!ret)
+ mxsfb->panel = panel;
+
+ return ret;
+}
+
+int mxsfb_create_output(struct drm_device *drm)
+{
+ struct device_node *ep_np = NULL;
+ struct of_endpoint ep;
+ int ret;
+
+ for_each_endpoint_of_node(drm->dev->of_node, ep_np) {
+ ret = of_graph_parse_endpoint(ep_np, &ep);
+ if (!ret)
+ ret = mxsfb_attach_endpoint(drm, &ep);
+
+ if (ret) {
+ of_node_put(ep_np);
+ return ret;
+ }
+ }
+
+ return 0;
+}
diff --git a/drivers/gpu/drm/mxsfb/mxsfb_regs.h b/drivers/gpu/drm/mxsfb/mxsfb_regs.h
new file mode 100644
index 0000000..31d62cd
--- /dev/null
+++ b/drivers/gpu/drm/mxsfb/mxsfb_regs.h
@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2010 Juergen Beisert, Pengutronix
+ * Copyright (C) 2016 Marek Vasut <marex@xxxxxxx>
+ *
+ * i.MX23/i.MX28/i.MX6SX MXSFB LCD controller driver.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MXSFB_REGS_H__
+#define __MXSFB_REGS_H__
+
+#define REG_SET 4
+#define REG_CLR 8
+
+#define LCDC_CTRL 0x00
+#define LCDC_CTRL1 0x10
+#define LCDC_V3_TRANSFER_COUNT 0x20
+#define LCDC_V4_TRANSFER_COUNT 0x30
+#define LCDC_V4_CUR_BUF 0x40
+#define LCDC_V4_NEXT_BUF 0x50
+#define LCDC_V3_CUR_BUF 0x30
+#define LCDC_V3_NEXT_BUF 0x40
+#define LCDC_VDCTRL0 0x70
+#define LCDC_VDCTRL1 0x80
+#define LCDC_VDCTRL2 0x90
+#define LCDC_VDCTRL3 0xa0
+#define LCDC_VDCTRL4 0xb0
+#define LCDC_V4_DEBUG0 0x1d0
+#define LCDC_V3_DEBUG0 0x1f0
+
+#define CTRL_SFTRST (1 << 31)
+#define CTRL_CLKGATE (1 << 30)
+#define CTRL_BYPASS_COUNT (1 << 19)
+#define CTRL_VSYNC_MODE (1 << 18)
+#define CTRL_DOTCLK_MODE (1 << 17)
+#define CTRL_DATA_SELECT (1 << 16)
+#define CTRL_SET_BUS_WIDTH(x) (((x) & 0x3) << 10)
+#define CTRL_GET_BUS_WIDTH(x) (((x) >> 10) & 0x3)
+#define CTRL_SET_WORD_LENGTH(x) (((x) & 0x3) << 8)
+#define CTRL_GET_WORD_LENGTH(x) (((x) >> 8) & 0x3)
+#define CTRL_MASTER (1 << 5)
+#define CTRL_DF16 (1 << 3)
+#define CTRL_DF18 (1 << 2)
+#define CTRL_DF24 (1 << 1)
+#define CTRL_RUN (1 << 0)
+
+#define CTRL1_FIFO_CLEAR (1 << 21)
+#define CTRL1_SET_BYTE_PACKAGING(x) (((x) & 0xf) << 16)
+#define CTRL1_GET_BYTE_PACKAGING(x) (((x) >> 16) & 0xf)
+#define CTRL1_CUR_FRAME_DONE_IRQ_EN (1 << 13)
+#define CTRL1_CUR_FRAME_DONE_IRQ (1 << 9)
+
+#define TRANSFER_COUNT_SET_VCOUNT(x) (((x) & 0xffff) << 16)
+#define TRANSFER_COUNT_GET_VCOUNT(x) (((x) >> 16) & 0xffff)
+#define TRANSFER_COUNT_SET_HCOUNT(x) ((x) & 0xffff)
+#define TRANSFER_COUNT_GET_HCOUNT(x) ((x) & 0xffff)
+
+#define VDCTRL0_ENABLE_PRESENT (1 << 28)
+#define VDCTRL0_VSYNC_ACT_HIGH (1 << 27)
+#define VDCTRL0_HSYNC_ACT_HIGH (1 << 26)
+#define VDCTRL0_DOTCLK_ACT_FALLING (1 << 25)
+#define VDCTRL0_ENABLE_ACT_HIGH (1 << 24)
+#define VDCTRL0_VSYNC_PERIOD_UNIT (1 << 21)
+#define VDCTRL0_VSYNC_PULSE_WIDTH_UNIT (1 << 20)
+#define VDCTRL0_HALF_LINE (1 << 19)
+#define VDCTRL0_HALF_LINE_MODE (1 << 18)
+#define VDCTRL0_SET_VSYNC_PULSE_WIDTH(x) ((x) & 0x3ffff)
+#define VDCTRL0_GET_VSYNC_PULSE_WIDTH(x) ((x) & 0x3ffff)
+
+#define VDCTRL2_SET_HSYNC_PERIOD(x) ((x) & 0x3ffff)
+#define VDCTRL2_GET_HSYNC_PERIOD(x) ((x) & 0x3ffff)
+
+#define VDCTRL3_MUX_SYNC_SIGNALS (1 << 29)
+#define VDCTRL3_VSYNC_ONLY (1 << 28)
+#define SET_HOR_WAIT_CNT(x) (((x) & 0xfff) << 16)
+#define GET_HOR_WAIT_CNT(x) (((x) >> 16) & 0xfff)
+#define SET_VERT_WAIT_CNT(x) ((x) & 0xffff)
+#define GET_VERT_WAIT_CNT(x) ((x) & 0xffff)
+
+#define VDCTRL4_SET_DOTCLK_DLY(x) (((x) & 0x7) << 29) /* v4 only */
+#define VDCTRL4_GET_DOTCLK_DLY(x) (((x) >> 29) & 0x7) /* v4 only */
+#define VDCTRL4_SYNC_SIGNALS_ON (1 << 18)
+#define SET_DOTCLK_H_VALID_DATA_CNT(x) ((x) & 0x3ffff)
+
+#define DEBUG0_HSYNC (1 < 26)
+#define DEBUG0_VSYNC (1 < 25)
+
+#define MXSFB_MIN_XRES 120
+#define MXSFB_MIN_YRES 120
+#define MXSFB_MAX_XRES 0xffff
+#define MXSFB_MAX_YRES 0xffff
+
+#define RED 0
+#define GREEN 1
+#define BLUE 2
+#define TRANSP 3
+
+#define STMLCDIF_8BIT 1 /* pixel data bus to the display is of 8 bit width */
+#define STMLCDIF_16BIT 0 /* pixel data bus to the display is of 16 bit width */
+#define STMLCDIF_18BIT 2 /* pixel data bus to the display is of 18 bit width */
+#define STMLCDIF_24BIT 3 /* pixel data bus to the display is of 24 bit width */
+
+#define MXSFB_SYNC_DATA_ENABLE_HIGH_ACT (1 << 6)
+#define MXSFB_SYNC_DOTCLK_FALLING_ACT (1 << 7) /* negative edge sampling */
+
+#endif /* __MXSFB_REGS_H__ */
--
2.10.2
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