Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

11 files changed, 2821 insertions, 0 deletions

diff --git a/drivers/gpu/drm/tilcdc/Kconfig b/drivers/gpu/drm/tilcdc/Kconfig
new file mode 100644
index 000000000..d3bd2d7a1
--- /dev/null
+++ b/drivers/gpu/drm/tilcdc/Kconfig
@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config DRM_TILCDC
+	tristate "DRM Support for TI LCDC Display Controller"
+	depends on DRM && OF && ARM
+	select DRM_KMS_HELPER
+	select DRM_GEM_DMA_HELPER
+	select DRM_BRIDGE
+	select DRM_PANEL_BRIDGE
+	select VIDEOMODE_HELPERS
+	select BACKLIGHT_CLASS_DEVICE
+	help
+	  Choose this option if you have an TI SoC with LCDC display
+	  controller, for example AM33xx in beagle-bone, DA8xx, or
+	  OMAP-L1xx.  This driver replaces the FB_DA8XX fbdev driver.
+
diff --git a/drivers/gpu/drm/tilcdc/Makefile b/drivers/gpu/drm/tilcdc/Makefile
new file mode 100644
index 000000000..f5190477d
--- /dev/null
+++ b/drivers/gpu/drm/tilcdc/Makefile
@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: GPL-2.0
+ifeq (, $(findstring -W,$(KCFLAGS)))
+	ccflags-y += -Werror
+endif
+
+tilcdc-y := \
+	tilcdc_plane.o \
+	tilcdc_crtc.o \
+	tilcdc_panel.o \
+	tilcdc_external.o \
+	tilcdc_drv.o
+
+obj-$(CONFIG_DRM_TILCDC)	+= tilcdc.o
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
new file mode 100644
index 000000000..b5f60b2b2
--- /dev/null
+++ b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
@@ -0,0 +1,1076 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2012 Texas Instruments
+ * Author: Rob Clark <robdclark@gmail.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/of_graph.h>
+#include <linux/pm_runtime.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_fb_dma_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_gem_dma_helper.h>
+#include <drm/drm_modeset_helper_vtables.h>
+#include <drm/drm_print.h>
+#include <drm/drm_vblank.h>
+
+#include "tilcdc_drv.h"
+#include "tilcdc_regs.h"
+
+#define TILCDC_VBLANK_SAFETY_THRESHOLD_US	1000
+#define TILCDC_PALETTE_SIZE			32
+#define TILCDC_PALETTE_FIRST_ENTRY		0x4000
+
+struct tilcdc_crtc {
+	struct drm_crtc base;
+
+	struct drm_plane primary;
+	const struct tilcdc_panel_info *info;
+	struct drm_pending_vblank_event *event;
+	struct mutex enable_lock;
+	bool enabled;
+	bool shutdown;
+	wait_queue_head_t frame_done_wq;
+	bool frame_done;
+	spinlock_t irq_lock;
+
+	unsigned int lcd_fck_rate;
+
+	ktime_t last_vblank;
+	unsigned int hvtotal_us;
+
+	struct drm_framebuffer *next_fb;
+
+	/* Only set if an external encoder is connected */
+	bool simulate_vesa_sync;
+
+	int sync_lost_count;
+	bool frame_intact;
+	struct work_struct recover_work;
+
+	dma_addr_t palette_dma_handle;
+	u16 *palette_base;
+	struct completion palette_loaded;
+};
+#define to_tilcdc_crtc(x) container_of(x, struct tilcdc_crtc, base)
+
+static void set_scanout(struct drm_crtc *crtc, struct drm_framebuffer *fb)
+{
+	struct drm_device *dev = crtc->dev;
+	struct tilcdc_drm_private *priv = dev->dev_private;
+	struct drm_gem_dma_object *gem;
+	dma_addr_t start, end;
+	u64 dma_base_and_ceiling;
+
+	gem = drm_fb_dma_get_gem_obj(fb, 0);
+
+	start = gem->dma_addr + fb->offsets[0] +
+		crtc->y * fb->pitches[0] +
+		crtc->x * fb->format->cpp[0];
+
+	end = start + (crtc->mode.vdisplay * fb->pitches[0]);
+
+	/* Write LCDC_DMA_FB_BASE_ADDR_0_REG and LCDC_DMA_FB_CEILING_ADDR_0_REG
+	 * with a single insruction, if available. This should make it more
+	 * unlikely that LCDC would fetch the DMA addresses in the middle of
+	 * an update.
+	 */
+	if (priv->rev == 1)
+		end -= 1;
+
+	dma_base_and_ceiling = (u64)end << 32 | start;
+	tilcdc_write64(dev, LCDC_DMA_FB_BASE_ADDR_0_REG, dma_base_and_ceiling);
+}
+
+/*
+ * The driver currently only supports only true color formats. For
+ * true color the palette block is bypassed, but a 32 byte palette
+ * should still be loaded. The first 16-bit entry must be 0x4000 while
+ * all other entries must be zeroed.
+ */
+static void tilcdc_crtc_load_palette(struct drm_crtc *crtc)
+{
+	struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+	struct drm_device *dev = crtc->dev;
+	struct tilcdc_drm_private *priv = dev->dev_private;
+	int ret;
+
+	reinit_completion(&tilcdc_crtc->palette_loaded);
+
+	/* Tell the LCDC where the palette is located. */
+	tilcdc_write(dev, LCDC_DMA_FB_BASE_ADDR_0_REG,
+		     tilcdc_crtc->palette_dma_handle);
+	tilcdc_write(dev, LCDC_DMA_FB_CEILING_ADDR_0_REG,
+		     (u32) tilcdc_crtc->palette_dma_handle +
+		     TILCDC_PALETTE_SIZE - 1);
+
+	/* Set dma load mode for palette loading only. */
+	tilcdc_write_mask(dev, LCDC_RASTER_CTRL_REG,
+			  LCDC_PALETTE_LOAD_MODE(PALETTE_ONLY),
+			  LCDC_PALETTE_LOAD_MODE_MASK);
+
+	/* Enable DMA Palette Loaded Interrupt */
+	if (priv->rev == 1)
+		tilcdc_set(dev, LCDC_RASTER_CTRL_REG, LCDC_V1_PL_INT_ENA);
+	else
+		tilcdc_write(dev, LCDC_INT_ENABLE_SET_REG, LCDC_V2_PL_INT_ENA);
+
+	/* Enable LCDC DMA and wait for palette to be loaded. */
+	tilcdc_clear_irqstatus(dev, 0xffffffff);
+	tilcdc_set(dev, LCDC_RASTER_CTRL_REG, LCDC_RASTER_ENABLE);
+
+	ret = wait_for_completion_timeout(&tilcdc_crtc->palette_loaded,
+					  msecs_to_jiffies(50));
+	if (ret == 0)
+		dev_err(dev->dev, "%s: Palette loading timeout", __func__);
+
+	/* Disable LCDC DMA and DMA Palette Loaded Interrupt. */
+	tilcdc_clear(dev, LCDC_RASTER_CTRL_REG, LCDC_RASTER_ENABLE);
+	if (priv->rev == 1)
+		tilcdc_clear(dev, LCDC_RASTER_CTRL_REG, LCDC_V1_PL_INT_ENA);
+	else
+		tilcdc_write(dev, LCDC_INT_ENABLE_CLR_REG, LCDC_V2_PL_INT_ENA);
+}
+
+static void tilcdc_crtc_enable_irqs(struct drm_device *dev)
+{
+	struct tilcdc_drm_private *priv = dev->dev_private;
+
+	tilcdc_clear_irqstatus(dev, 0xffffffff);
+
+	if (priv->rev == 1) {
+		tilcdc_set(dev, LCDC_RASTER_CTRL_REG,
+			LCDC_V1_SYNC_LOST_INT_ENA | LCDC_V1_FRAME_DONE_INT_ENA |
+			LCDC_V1_UNDERFLOW_INT_ENA);
+	} else {
+		tilcdc_write(dev, LCDC_INT_ENABLE_SET_REG,
+			LCDC_V2_UNDERFLOW_INT_ENA |
+			LCDC_FRAME_DONE | LCDC_SYNC_LOST);
+	}
+}
+
+static void tilcdc_crtc_disable_irqs(struct drm_device *dev)
+{
+	struct tilcdc_drm_private *priv = dev->dev_private;
+
+	/* disable irqs that we might have enabled: */
+	if (priv->rev == 1) {
+		tilcdc_clear(dev, LCDC_RASTER_CTRL_REG,
+			LCDC_V1_SYNC_LOST_INT_ENA | LCDC_V1_FRAME_DONE_INT_ENA |
+			LCDC_V1_UNDERFLOW_INT_ENA | LCDC_V1_PL_INT_ENA);
+		tilcdc_clear(dev, LCDC_DMA_CTRL_REG,
+			LCDC_V1_END_OF_FRAME_INT_ENA);
+	} else {
+		tilcdc_write(dev, LCDC_INT_ENABLE_CLR_REG,
+			LCDC_V2_UNDERFLOW_INT_ENA | LCDC_V2_PL_INT_ENA |
+			LCDC_V2_END_OF_FRAME0_INT_ENA |
+			LCDC_FRAME_DONE | LCDC_SYNC_LOST);
+	}
+}
+
+static void reset(struct drm_crtc *crtc)
+{
+	struct drm_device *dev = crtc->dev;
+	struct tilcdc_drm_private *priv = dev->dev_private;
+
+	if (priv->rev != 2)
+		return;
+
+	tilcdc_set(dev, LCDC_CLK_RESET_REG, LCDC_CLK_MAIN_RESET);
+	usleep_range(250, 1000);
+	tilcdc_clear(dev, LCDC_CLK_RESET_REG, LCDC_CLK_MAIN_RESET);
+}
+
+/*
+ * Calculate the percentage difference between the requested pixel clock rate
+ * and the effective rate resulting from calculating the clock divider value.
+ */
+static unsigned int tilcdc_pclk_diff(unsigned long rate,
+				     unsigned long real_rate)
+{
+	int r = rate / 100, rr = real_rate / 100;
+
+	return (unsigned int)(abs(((rr - r) * 100) / r));
+}
+
+static void tilcdc_crtc_set_clk(struct drm_crtc *crtc)
+{
+	struct drm_device *dev = crtc->dev;
+	struct tilcdc_drm_private *priv = dev->dev_private;
+	struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+	unsigned long clk_rate, real_pclk_rate, pclk_rate;
+	unsigned int clkdiv;
+	int ret;
+
+	clkdiv = 2; /* first try using a standard divider of 2 */
+
+	/* mode.clock is in KHz, set_rate wants parameter in Hz */
+	pclk_rate = crtc->mode.clock * 1000;
+
+	ret = clk_set_rate(priv->clk, pclk_rate * clkdiv);
+	clk_rate = clk_get_rate(priv->clk);
+	real_pclk_rate = clk_rate / clkdiv;
+	if (ret < 0 || tilcdc_pclk_diff(pclk_rate, real_pclk_rate) > 5) {
+		/*
+		 * If we fail to set the clock rate (some architectures don't
+		 * use the common clock framework yet and may not implement
+		 * all the clk API calls for every clock), try the next best
+		 * thing: adjusting the clock divider, unless clk_get_rate()
+		 * failed as well.
+		 */
+		if (!clk_rate) {
+			/* Nothing more we can do. Just bail out. */
+			dev_err(dev->dev,
+				"failed to set the pixel clock - unable to read current lcdc clock rate\n");
+			return;
+		}
+
+		clkdiv = DIV_ROUND_CLOSEST(clk_rate, pclk_rate);
+
+		/*
+		 * Emit a warning if the real clock rate resulting from the
+		 * calculated divider differs much from the requested rate.
+		 *
+		 * 5% is an arbitrary value - LCDs are usually quite tolerant
+		 * about pixel clock rates.
+		 */
+		real_pclk_rate = clk_rate / clkdiv;
+
+		if (tilcdc_pclk_diff(pclk_rate, real_pclk_rate) > 5) {
+			dev_warn(dev->dev,
+				 "effective pixel clock rate (%luHz) differs from the requested rate (%luHz)\n",
+				 real_pclk_rate, pclk_rate);
+		}
+	}
+
+	tilcdc_crtc->lcd_fck_rate = clk_rate;
+
+	DBG("lcd_clk=%u, mode clock=%d, div=%u",
+	    tilcdc_crtc->lcd_fck_rate, crtc->mode.clock, clkdiv);
+
+	/* Configure the LCD clock divisor. */
+	tilcdc_write(dev, LCDC_CTRL_REG, LCDC_CLK_DIVISOR(clkdiv) |
+		     LCDC_RASTER_MODE);
+
+	if (priv->rev == 2)
+		tilcdc_set(dev, LCDC_CLK_ENABLE_REG,
+				LCDC_V2_DMA_CLK_EN | LCDC_V2_LIDD_CLK_EN |
+				LCDC_V2_CORE_CLK_EN);
+}
+
+static uint tilcdc_mode_hvtotal(const struct drm_display_mode *mode)
+{
+	return (uint) div_u64(1000llu * mode->htotal * mode->vtotal,
+			      mode->clock);
+}
+
+static void tilcdc_crtc_set_mode(struct drm_crtc *crtc)
+{
+	struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+	struct drm_device *dev = crtc->dev;
+	struct tilcdc_drm_private *priv = dev->dev_private;
+	const struct tilcdc_panel_info *info = tilcdc_crtc->info;
+	uint32_t reg, hbp, hfp, hsw, vbp, vfp, vsw;
+	struct drm_display_mode *mode = &crtc->state->adjusted_mode;
+	struct drm_framebuffer *fb = crtc->primary->state->fb;
+
+	if (WARN_ON(!info))
+		return;
+
+	if (WARN_ON(!fb))
+		return;
+
+	/* Configure the Burst Size and fifo threshold of DMA: */
+	reg = tilcdc_read(dev, LCDC_DMA_CTRL_REG) & ~0x00000770;
+	switch (info->dma_burst_sz) {
+	case 1:
+		reg |= LCDC_DMA_BURST_SIZE(LCDC_DMA_BURST_1);
+		break;
+	case 2:
+		reg |= LCDC_DMA_BURST_SIZE(LCDC_DMA_BURST_2);
+		break;
+	case 4:
+		reg |= LCDC_DMA_BURST_SIZE(LCDC_DMA_BURST_4);
+		break;
+	case 8:
+		reg |= LCDC_DMA_BURST_SIZE(LCDC_DMA_BURST_8);
+		break;
+	case 16:
+		reg |= LCDC_DMA_BURST_SIZE(LCDC_DMA_BURST_16);
+		break;
+	default:
+		dev_err(dev->dev, "invalid burst size\n");
+		return;
+	}
+	reg |= (info->fifo_th << 8);
+	tilcdc_write(dev, LCDC_DMA_CTRL_REG, reg);
+
+	/* Configure timings: */
+	hbp = mode->htotal - mode->hsync_end;
+	hfp = mode->hsync_start - mode->hdisplay;
+	hsw = mode->hsync_end - mode->hsync_start;
+	vbp = mode->vtotal - mode->vsync_end;
+	vfp = mode->vsync_start - mode->vdisplay;
+	vsw = mode->vsync_end - mode->vsync_start;
+
+	DBG("%dx%d, hbp=%u, hfp=%u, hsw=%u, vbp=%u, vfp=%u, vsw=%u",
+	    mode->hdisplay, mode->vdisplay, hbp, hfp, hsw, vbp, vfp, vsw);
+
+	/* Set AC Bias Period and Number of Transitions per Interrupt: */
+	reg = tilcdc_read(dev, LCDC_RASTER_TIMING_2_REG) & ~0x000fff00;
+	reg |= LCDC_AC_BIAS_FREQUENCY(info->ac_bias) |
+		LCDC_AC_BIAS_TRANSITIONS_PER_INT(info->ac_bias_intrpt);
+
+	/*
+	 * subtract one from hfp, hbp, hsw because the hardware uses
+	 * a value of 0 as 1
+	 */
+	if (priv->rev == 2) {
+		/* clear bits we're going to set */
+		reg &= ~0x78000033;
+		reg |= ((hfp-1) & 0x300) >> 8;
+		reg |= ((hbp-1) & 0x300) >> 4;
+		reg |= ((hsw-1) & 0x3c0) << 21;
+	}
+	tilcdc_write(dev, LCDC_RASTER_TIMING_2_REG, reg);
+
+	reg = (((mode->hdisplay >> 4) - 1) << 4) |
+		(((hbp-1) & 0xff) << 24) |
+		(((hfp-1) & 0xff) << 16) |
+		(((hsw-1) & 0x3f) << 10);
+	if (priv->rev == 2)
+		reg |= (((mode->hdisplay >> 4) - 1) & 0x40) >> 3;
+	tilcdc_write(dev, LCDC_RASTER_TIMING_0_REG, reg);
+
+	reg = ((mode->vdisplay - 1) & 0x3ff) |
+		((vbp & 0xff) << 24) |
+		((vfp & 0xff) << 16) |
+		(((vsw-1) & 0x3f) << 10);
+	tilcdc_write(dev, LCDC_RASTER_TIMING_1_REG, reg);
+
+	/*
+	 * be sure to set Bit 10 for the V2 LCDC controller,
+	 * otherwise limited to 1024 pixels width, stopping
+	 * 1920x1080 being supported.
+	 */
+	if (priv->rev == 2) {
+		if ((mode->vdisplay - 1) & 0x400) {
+			tilcdc_set(dev, LCDC_RASTER_TIMING_2_REG,
+				LCDC_LPP_B10);
+		} else {
+			tilcdc_clear(dev, LCDC_RASTER_TIMING_2_REG,
+				LCDC_LPP_B10);
+		}
+	}
+
+	/* Configure display type: */
+	reg = tilcdc_read(dev, LCDC_RASTER_CTRL_REG) &
+		~(LCDC_TFT_MODE | LCDC_MONO_8BIT_MODE | LCDC_MONOCHROME_MODE |
+		  LCDC_V2_TFT_24BPP_MODE | LCDC_V2_TFT_24BPP_UNPACK |
+		  0x000ff000 /* Palette Loading Delay bits */);
+	reg |= LCDC_TFT_MODE; /* no monochrome/passive support */
+	if (info->tft_alt_mode)
+		reg |= LCDC_TFT_ALT_ENABLE;
+	if (priv->rev == 2) {
+		switch (fb->format->format) {
+		case DRM_FORMAT_BGR565:
+		case DRM_FORMAT_RGB565:
+			break;
+		case DRM_FORMAT_XBGR8888:
+		case DRM_FORMAT_XRGB8888:
+			reg |= LCDC_V2_TFT_24BPP_UNPACK;
+			fallthrough;
+		case DRM_FORMAT_BGR888:
+		case DRM_FORMAT_RGB888:
+			reg |= LCDC_V2_TFT_24BPP_MODE;
+			break;
+		default:
+			dev_err(dev->dev, "invalid pixel format\n");
+			return;
+		}
+	}
+	reg |= info->fdd << 12;
+	tilcdc_write(dev, LCDC_RASTER_CTRL_REG, reg);
+
+	if (info->invert_pxl_clk)
+		tilcdc_set(dev, LCDC_RASTER_TIMING_2_REG, LCDC_INVERT_PIXEL_CLOCK);
+	else
+		tilcdc_clear(dev, LCDC_RASTER_TIMING_2_REG, LCDC_INVERT_PIXEL_CLOCK);
+
+	if (info->sync_ctrl)
+		tilcdc_set(dev, LCDC_RASTER_TIMING_2_REG, LCDC_SYNC_CTRL);
+	else
+		tilcdc_clear(dev, LCDC_RASTER_TIMING_2_REG, LCDC_SYNC_CTRL);
+
+	if (info->sync_edge)
+		tilcdc_set(dev, LCDC_RASTER_TIMING_2_REG, LCDC_SYNC_EDGE);
+	else
+		tilcdc_clear(dev, LCDC_RASTER_TIMING_2_REG, LCDC_SYNC_EDGE);
+
+	if (mode->flags & DRM_MODE_FLAG_NHSYNC)
+		tilcdc_set(dev, LCDC_RASTER_TIMING_2_REG, LCDC_INVERT_HSYNC);
+	else
+		tilcdc_clear(dev, LCDC_RASTER_TIMING_2_REG, LCDC_INVERT_HSYNC);
+
+	if (mode->flags & DRM_MODE_FLAG_NVSYNC)
+		tilcdc_set(dev, LCDC_RASTER_TIMING_2_REG, LCDC_INVERT_VSYNC);
+	else
+		tilcdc_clear(dev, LCDC_RASTER_TIMING_2_REG, LCDC_INVERT_VSYNC);
+
+	if (info->raster_order)
+		tilcdc_set(dev, LCDC_RASTER_CTRL_REG, LCDC_RASTER_ORDER);
+	else
+		tilcdc_clear(dev, LCDC_RASTER_CTRL_REG, LCDC_RASTER_ORDER);
+
+	tilcdc_crtc_set_clk(crtc);
+
+	tilcdc_crtc_load_palette(crtc);
+
+	set_scanout(crtc, fb);
+
+	drm_mode_copy(&crtc->hwmode, &crtc->state->adjusted_mode);
+
+	tilcdc_crtc->hvtotal_us =
+		tilcdc_mode_hvtotal(&crtc->hwmode);
+}
+
+static void tilcdc_crtc_enable(struct drm_crtc *crtc)
+{
+	struct drm_device *dev = crtc->dev;
+	struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+	unsigned long flags;
+
+	mutex_lock(&tilcdc_crtc->enable_lock);
+	if (tilcdc_crtc->enabled || tilcdc_crtc->shutdown) {
+		mutex_unlock(&tilcdc_crtc->enable_lock);
+		return;
+	}
+
+	pm_runtime_get_sync(dev->dev);
+
+	reset(crtc);
+
+	tilcdc_crtc_set_mode(crtc);
+
+	tilcdc_crtc_enable_irqs(dev);
+
+	tilcdc_clear(dev, LCDC_DMA_CTRL_REG, LCDC_DUAL_FRAME_BUFFER_ENABLE);
+	tilcdc_write_mask(dev, LCDC_RASTER_CTRL_REG,
+			  LCDC_PALETTE_LOAD_MODE(DATA_ONLY),
+			  LCDC_PALETTE_LOAD_MODE_MASK);
+
+	/* There is no real chance for a race here as the time stamp
+	 * is taken before the raster DMA is started. The spin-lock is
+	 * taken to have a memory barrier after taking the time-stamp
+	 * and to avoid a context switch between taking the stamp and
+	 * enabling the raster.
+	 */
+	spin_lock_irqsave(&tilcdc_crtc->irq_lock, flags);
+	tilcdc_crtc->last_vblank = ktime_get();
+	tilcdc_set(dev, LCDC_RASTER_CTRL_REG, LCDC_RASTER_ENABLE);
+	spin_unlock_irqrestore(&tilcdc_crtc->irq_lock, flags);
+
+	drm_crtc_vblank_on(crtc);
+
+	tilcdc_crtc->enabled = true;
+	mutex_unlock(&tilcdc_crtc->enable_lock);
+}
+
+static void tilcdc_crtc_atomic_enable(struct drm_crtc *crtc,
+				      struct drm_atomic_state *state)
+{
+	tilcdc_crtc_enable(crtc);
+}
+
+static void tilcdc_crtc_off(struct drm_crtc *crtc, bool shutdown)
+{
+	struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+	struct drm_device *dev = crtc->dev;
+	int ret;
+
+	mutex_lock(&tilcdc_crtc->enable_lock);
+	if (shutdown)
+		tilcdc_crtc->shutdown = true;
+	if (!tilcdc_crtc->enabled) {
+		mutex_unlock(&tilcdc_crtc->enable_lock);
+		return;
+	}
+	tilcdc_crtc->frame_done = false;
+	tilcdc_clear(dev, LCDC_RASTER_CTRL_REG, LCDC_RASTER_ENABLE);
+
+	/*
+	 * Wait for framedone irq which will still come before putting
+	 * things to sleep..
+	 */
+	ret = wait_event_timeout(tilcdc_crtc->frame_done_wq,
+				 tilcdc_crtc->frame_done,
+				 msecs_to_jiffies(500));
+	if (ret == 0)
+		dev_err(dev->dev, "%s: timeout waiting for framedone\n",
+			__func__);
+
+	drm_crtc_vblank_off(crtc);
+
+	spin_lock_irq(&crtc->dev->event_lock);
+
+	if (crtc->state->event) {
+		drm_crtc_send_vblank_event(crtc, crtc->state->event);
+		crtc->state->event = NULL;
+	}
+
+	spin_unlock_irq(&crtc->dev->event_lock);
+
+	tilcdc_crtc_disable_irqs(dev);
+
+	pm_runtime_put_sync(dev->dev);
+
+	tilcdc_crtc->enabled = false;
+	mutex_unlock(&tilcdc_crtc->enable_lock);
+}
+
+static void tilcdc_crtc_disable(struct drm_crtc *crtc)
+{
+	tilcdc_crtc_off(crtc, false);
+}
+
+static void tilcdc_crtc_atomic_disable(struct drm_crtc *crtc,
+				       struct drm_atomic_state *state)
+{
+	tilcdc_crtc_disable(crtc);
+}
+
+static void tilcdc_crtc_atomic_flush(struct drm_crtc *crtc,
+				     struct drm_atomic_state *state)
+{
+	if (!crtc->state->event)
+		return;
+
+	spin_lock_irq(&crtc->dev->event_lock);
+	drm_crtc_send_vblank_event(crtc, crtc->state->event);
+	crtc->state->event = NULL;
+	spin_unlock_irq(&crtc->dev->event_lock);
+}
+
+void tilcdc_crtc_shutdown(struct drm_crtc *crtc)
+{
+	tilcdc_crtc_off(crtc, true);
+}
+
+static bool tilcdc_crtc_is_on(struct drm_crtc *crtc)
+{
+	return crtc->state && crtc->state->enable && crtc->state->active;
+}
+
+static void tilcdc_crtc_recover_work(struct work_struct *work)
+{
+	struct tilcdc_crtc *tilcdc_crtc =
+		container_of(work, struct tilcdc_crtc, recover_work);
+	struct drm_crtc *crtc = &tilcdc_crtc->base;
+
+	dev_info(crtc->dev->dev, "%s: Reset CRTC", __func__);
+
+	drm_modeset_lock(&crtc->mutex, NULL);
+
+	if (!tilcdc_crtc_is_on(crtc))
+		goto out;
+
+	tilcdc_crtc_disable(crtc);
+	tilcdc_crtc_enable(crtc);
+out:
+	drm_modeset_unlock(&crtc->mutex);
+}
+
+static void tilcdc_crtc_destroy(struct drm_crtc *crtc)
+{
+	struct tilcdc_drm_private *priv = crtc->dev->dev_private;
+
+	tilcdc_crtc_shutdown(crtc);
+
+	flush_workqueue(priv->wq);
+
+	of_node_put(crtc->port);
+	drm_crtc_cleanup(crtc);
+}
+
+int tilcdc_crtc_update_fb(struct drm_crtc *crtc,
+		struct drm_framebuffer *fb,
+		struct drm_pending_vblank_event *event)
+{
+	struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+	struct drm_device *dev = crtc->dev;
+
+	if (tilcdc_crtc->event) {
+		dev_err(dev->dev, "already pending page flip!\n");
+		return -EBUSY;
+	}
+
+	tilcdc_crtc->event = event;
+
+	mutex_lock(&tilcdc_crtc->enable_lock);
+
+	if (tilcdc_crtc->enabled) {
+		unsigned long flags;
+		ktime_t next_vblank;
+		s64 tdiff;
+
+		spin_lock_irqsave(&tilcdc_crtc->irq_lock, flags);
+
+		next_vblank = ktime_add_us(tilcdc_crtc->last_vblank,
+					   tilcdc_crtc->hvtotal_us);
+		tdiff = ktime_to_us(ktime_sub(next_vblank, ktime_get()));
+
+		if (tdiff < TILCDC_VBLANK_SAFETY_THRESHOLD_US)
+			tilcdc_crtc->next_fb = fb;
+		else
+			set_scanout(crtc, fb);
+
+		spin_unlock_irqrestore(&tilcdc_crtc->irq_lock, flags);
+	}
+
+	mutex_unlock(&tilcdc_crtc->enable_lock);
+
+	return 0;
+}
+
+static bool tilcdc_crtc_mode_fixup(struct drm_crtc *crtc,
+		const struct drm_display_mode *mode,
+		struct drm_display_mode *adjusted_mode)
+{
+	struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+
+	if (!tilcdc_crtc->simulate_vesa_sync)
+		return true;
+
+	/*
+	 * tilcdc does not generate VESA-compliant sync but aligns
+	 * VS on the second edge of HS instead of first edge.
+	 * We use adjusted_mode, to fixup sync by aligning both rising
+	 * edges and add HSKEW offset to fix the sync.
+	 */
+	adjusted_mode->hskew = mode->hsync_end - mode->hsync_start;
+	adjusted_mode->flags |= DRM_MODE_FLAG_HSKEW;
+
+	if (mode->flags & DRM_MODE_FLAG_NHSYNC) {
+		adjusted_mode->flags |= DRM_MODE_FLAG_PHSYNC;
+		adjusted_mode->flags &= ~DRM_MODE_FLAG_NHSYNC;
+	} else {
+		adjusted_mode->flags |= DRM_MODE_FLAG_NHSYNC;
+		adjusted_mode->flags &= ~DRM_MODE_FLAG_PHSYNC;
+	}
+
+	return true;
+}
+
+static int tilcdc_crtc_atomic_check(struct drm_crtc *crtc,
+				    struct drm_atomic_state *state)
+{
+	struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
+									  crtc);
+	/* If we are not active we don't care */
+	if (!crtc_state->active)
+		return 0;
+
+	if (state->planes[0].ptr != crtc->primary ||
+	    state->planes[0].state == NULL ||
+	    state->planes[0].state->crtc != crtc) {
+		dev_dbg(crtc->dev->dev, "CRTC primary plane must be present");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int tilcdc_crtc_enable_vblank(struct drm_crtc *crtc)
+{
+	struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+	struct drm_device *dev = crtc->dev;
+	struct tilcdc_drm_private *priv = dev->dev_private;
+	unsigned long flags;
+
+	spin_lock_irqsave(&tilcdc_crtc->irq_lock, flags);
+
+	tilcdc_clear_irqstatus(dev, LCDC_END_OF_FRAME0);
+
+	if (priv->rev == 1)
+		tilcdc_set(dev, LCDC_DMA_CTRL_REG,
+			   LCDC_V1_END_OF_FRAME_INT_ENA);
+	else
+		tilcdc_set(dev, LCDC_INT_ENABLE_SET_REG,
+			   LCDC_V2_END_OF_FRAME0_INT_ENA);
+
+	spin_unlock_irqrestore(&tilcdc_crtc->irq_lock, flags);
+
+	return 0;
+}
+
+static void tilcdc_crtc_disable_vblank(struct drm_crtc *crtc)
+{
+	struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+	struct drm_device *dev = crtc->dev;
+	struct tilcdc_drm_private *priv = dev->dev_private;
+	unsigned long flags;
+
+	spin_lock_irqsave(&tilcdc_crtc->irq_lock, flags);
+
+	if (priv->rev == 1)
+		tilcdc_clear(dev, LCDC_DMA_CTRL_REG,
+			     LCDC_V1_END_OF_FRAME_INT_ENA);
+	else
+		tilcdc_clear(dev, LCDC_INT_ENABLE_SET_REG,
+			     LCDC_V2_END_OF_FRAME0_INT_ENA);
+
+	spin_unlock_irqrestore(&tilcdc_crtc->irq_lock, flags);
+}
+
+static void tilcdc_crtc_reset(struct drm_crtc *crtc)
+{
+	struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+	struct drm_device *dev = crtc->dev;
+	int ret;
+
+	drm_atomic_helper_crtc_reset(crtc);
+
+	/* Turn the raster off if it for some reason is on. */
+	pm_runtime_get_sync(dev->dev);
+	if (tilcdc_read(dev, LCDC_RASTER_CTRL_REG) & LCDC_RASTER_ENABLE) {
+		/* Enable DMA Frame Done Interrupt */
+		tilcdc_write(dev, LCDC_INT_ENABLE_SET_REG, LCDC_FRAME_DONE);
+		tilcdc_clear_irqstatus(dev, 0xffffffff);
+
+		tilcdc_crtc->frame_done = false;
+		tilcdc_clear(dev, LCDC_RASTER_CTRL_REG, LCDC_RASTER_ENABLE);
+
+		ret = wait_event_timeout(tilcdc_crtc->frame_done_wq,
+					 tilcdc_crtc->frame_done,
+					 msecs_to_jiffies(500));
+		if (ret == 0)
+			dev_err(dev->dev, "%s: timeout waiting for framedone\n",
+				__func__);
+	}
+	pm_runtime_put_sync(dev->dev);
+}
+
+static const struct drm_crtc_funcs tilcdc_crtc_funcs = {
+	.destroy        = tilcdc_crtc_destroy,
+	.set_config     = drm_atomic_helper_set_config,
+	.page_flip      = drm_atomic_helper_page_flip,
+	.reset		= tilcdc_crtc_reset,
+	.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
+	.enable_vblank	= tilcdc_crtc_enable_vblank,
+	.disable_vblank	= tilcdc_crtc_disable_vblank,
+};
+
+static enum drm_mode_status
+tilcdc_crtc_mode_valid(struct drm_crtc *crtc,
+		       const struct drm_display_mode *mode)
+{
+	struct tilcdc_drm_private *priv = crtc->dev->dev_private;
+	unsigned int bandwidth;
+	uint32_t hbp, hfp, hsw, vbp, vfp, vsw;
+
+	/*
+	 * check to see if the width is within the range that
+	 * the LCD Controller physically supports
+	 */
+	if (mode->hdisplay > priv->max_width)
+		return MODE_VIRTUAL_X;
+
+	/* width must be multiple of 16 */
+	if (mode->hdisplay & 0xf)
+		return MODE_VIRTUAL_X;
+
+	if (mode->vdisplay > 2048)
+		return MODE_VIRTUAL_Y;
+
+	DBG("Processing mode %dx%d@%d with pixel clock %d",
+		mode->hdisplay, mode->vdisplay,
+		drm_mode_vrefresh(mode), mode->clock);
+
+	hbp = mode->htotal - mode->hsync_end;
+	hfp = mode->hsync_start - mode->hdisplay;
+	hsw = mode->hsync_end - mode->hsync_start;
+	vbp = mode->vtotal - mode->vsync_end;
+	vfp = mode->vsync_start - mode->vdisplay;
+	vsw = mode->vsync_end - mode->vsync_start;
+
+	if ((hbp-1) & ~0x3ff) {
+		DBG("Pruning mode: Horizontal Back Porch out of range");
+		return MODE_HBLANK_WIDE;
+	}
+
+	if ((hfp-1) & ~0x3ff) {
+		DBG("Pruning mode: Horizontal Front Porch out of range");
+		return MODE_HBLANK_WIDE;
+	}
+
+	if ((hsw-1) & ~0x3ff) {
+		DBG("Pruning mode: Horizontal Sync Width out of range");
+		return MODE_HSYNC_WIDE;
+	}
+
+	if (vbp & ~0xff) {
+		DBG("Pruning mode: Vertical Back Porch out of range");
+		return MODE_VBLANK_WIDE;
+	}
+
+	if (vfp & ~0xff) {
+		DBG("Pruning mode: Vertical Front Porch out of range");
+		return MODE_VBLANK_WIDE;
+	}
+
+	if ((vsw-1) & ~0x3f) {
+		DBG("Pruning mode: Vertical Sync Width out of range");
+		return MODE_VSYNC_WIDE;
+	}
+
+	/*
+	 * some devices have a maximum allowed pixel clock
+	 * configured from the DT
+	 */
+	if (mode->clock > priv->max_pixelclock) {
+		DBG("Pruning mode: pixel clock too high");
+		return MODE_CLOCK_HIGH;
+	}
+
+	/*
+	 * some devices further limit the max horizontal resolution
+	 * configured from the DT
+	 */
+	if (mode->hdisplay > priv->max_width)
+		return MODE_BAD_WIDTH;
+
+	/* filter out modes that would require too much memory bandwidth: */
+	bandwidth = mode->hdisplay * mode->vdisplay *
+		drm_mode_vrefresh(mode);
+	if (bandwidth > priv->max_bandwidth) {
+		DBG("Pruning mode: exceeds defined bandwidth limit");
+		return MODE_BAD;
+	}
+
+	return MODE_OK;
+}
+
+static const struct drm_crtc_helper_funcs tilcdc_crtc_helper_funcs = {
+	.mode_valid	= tilcdc_crtc_mode_valid,
+	.mode_fixup	= tilcdc_crtc_mode_fixup,
+	.atomic_check	= tilcdc_crtc_atomic_check,
+	.atomic_enable	= tilcdc_crtc_atomic_enable,
+	.atomic_disable	= tilcdc_crtc_atomic_disable,
+	.atomic_flush	= tilcdc_crtc_atomic_flush,
+};
+
+void tilcdc_crtc_set_panel_info(struct drm_crtc *crtc,
+		const struct tilcdc_panel_info *info)
+{
+	struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+	tilcdc_crtc->info = info;
+}
+
+void tilcdc_crtc_set_simulate_vesa_sync(struct drm_crtc *crtc,
+					bool simulate_vesa_sync)
+{
+	struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+
+	tilcdc_crtc->simulate_vesa_sync = simulate_vesa_sync;
+}
+
+void tilcdc_crtc_update_clk(struct drm_crtc *crtc)
+{
+	struct drm_device *dev = crtc->dev;
+	struct tilcdc_drm_private *priv = dev->dev_private;
+	struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+
+	drm_modeset_lock(&crtc->mutex, NULL);
+	if (tilcdc_crtc->lcd_fck_rate != clk_get_rate(priv->clk)) {
+		if (tilcdc_crtc_is_on(crtc)) {
+			pm_runtime_get_sync(dev->dev);
+			tilcdc_crtc_disable(crtc);
+
+			tilcdc_crtc_set_clk(crtc);
+
+			tilcdc_crtc_enable(crtc);
+			pm_runtime_put_sync(dev->dev);
+		}
+	}
+	drm_modeset_unlock(&crtc->mutex);
+}
+
+#define SYNC_LOST_COUNT_LIMIT 50
+
+irqreturn_t tilcdc_crtc_irq(struct drm_crtc *crtc)
+{
+	struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+	struct drm_device *dev = crtc->dev;
+	struct tilcdc_drm_private *priv = dev->dev_private;
+	uint32_t stat, reg;
+
+	stat = tilcdc_read_irqstatus(dev);
+	tilcdc_clear_irqstatus(dev, stat);
+
+	if (stat & LCDC_END_OF_FRAME0) {
+		bool skip_event = false;
+		ktime_t now;
+
+		now = ktime_get();
+
+		spin_lock(&tilcdc_crtc->irq_lock);
+
+		tilcdc_crtc->last_vblank = now;
+
+		if (tilcdc_crtc->next_fb) {
+			set_scanout(crtc, tilcdc_crtc->next_fb);
+			tilcdc_crtc->next_fb = NULL;
+			skip_event = true;
+		}
+
+		spin_unlock(&tilcdc_crtc->irq_lock);
+
+		drm_crtc_handle_vblank(crtc);
+
+		if (!skip_event) {
+			struct drm_pending_vblank_event *event;
+
+			spin_lock(&dev->event_lock);
+
+			event = tilcdc_crtc->event;
+			tilcdc_crtc->event = NULL;
+			if (event)
+				drm_crtc_send_vblank_event(crtc, event);
+
+			spin_unlock(&dev->event_lock);
+		}
+
+		if (tilcdc_crtc->frame_intact)
+			tilcdc_crtc->sync_lost_count = 0;
+		else
+			tilcdc_crtc->frame_intact = true;
+	}
+
+	if (stat & LCDC_FIFO_UNDERFLOW)
+		dev_err_ratelimited(dev->dev, "%s(0x%08x): FIFO underflow",
+				    __func__, stat);
+
+	if (stat & LCDC_PL_LOAD_DONE) {
+		complete(&tilcdc_crtc->palette_loaded);
+		if (priv->rev == 1)
+			tilcdc_clear(dev, LCDC_RASTER_CTRL_REG,
+				     LCDC_V1_PL_INT_ENA);
+		else
+			tilcdc_write(dev, LCDC_INT_ENABLE_CLR_REG,
+				     LCDC_V2_PL_INT_ENA);
+	}
+
+	if (stat & LCDC_SYNC_LOST) {
+		dev_err_ratelimited(dev->dev, "%s(0x%08x): Sync lost",
+				    __func__, stat);
+		tilcdc_crtc->frame_intact = false;
+		if (priv->rev == 1) {
+			reg = tilcdc_read(dev, LCDC_RASTER_CTRL_REG);
+			if (reg & LCDC_RASTER_ENABLE) {
+				tilcdc_clear(dev, LCDC_RASTER_CTRL_REG,
+					     LCDC_RASTER_ENABLE);
+				tilcdc_set(dev, LCDC_RASTER_CTRL_REG,
+					   LCDC_RASTER_ENABLE);
+			}
+		} else {
+			if (tilcdc_crtc->sync_lost_count++ >
+			    SYNC_LOST_COUNT_LIMIT) {
+				dev_err(dev->dev,
+					"%s(0x%08x): Sync lost flood detected, recovering",
+					__func__, stat);
+				queue_work(system_wq,
+					   &tilcdc_crtc->recover_work);
+				tilcdc_write(dev, LCDC_INT_ENABLE_CLR_REG,
+					     LCDC_SYNC_LOST);
+				tilcdc_crtc->sync_lost_count = 0;
+			}
+		}
+	}
+
+	if (stat & LCDC_FRAME_DONE) {
+		tilcdc_crtc->frame_done = true;
+		wake_up(&tilcdc_crtc->frame_done_wq);
+		/* rev 1 lcdc appears to hang if irq is not disabled here */
+		if (priv->rev == 1)
+			tilcdc_clear(dev, LCDC_RASTER_CTRL_REG,
+				     LCDC_V1_FRAME_DONE_INT_ENA);
+	}
+
+	/* For revision 2 only */
+	if (priv->rev == 2) {
+		/* Indicate to LCDC that the interrupt service routine has
+		 * completed, see 13.3.6.1.6 in AM335x TRM.
+		 */
+		tilcdc_write(dev, LCDC_END_OF_INT_IND_REG, 0);
+	}
+
+	return IRQ_HANDLED;
+}
+
+int tilcdc_crtc_create(struct drm_device *dev)
+{
+	struct tilcdc_drm_private *priv = dev->dev_private;
+	struct tilcdc_crtc *tilcdc_crtc;
+	struct drm_crtc *crtc;
+	int ret;
+
+	tilcdc_crtc = devm_kzalloc(dev->dev, sizeof(*tilcdc_crtc), GFP_KERNEL);
+	if (!tilcdc_crtc)
+		return -ENOMEM;
+
+	init_completion(&tilcdc_crtc->palette_loaded);
+	tilcdc_crtc->palette_base = dmam_alloc_coherent(dev->dev,
+					TILCDC_PALETTE_SIZE,
+					&tilcdc_crtc->palette_dma_handle,
+					GFP_KERNEL | __GFP_ZERO);
+	if (!tilcdc_crtc->palette_base)
+		return -ENOMEM;
+	*tilcdc_crtc->palette_base = TILCDC_PALETTE_FIRST_ENTRY;
+
+	crtc = &tilcdc_crtc->base;
+
+	ret = tilcdc_plane_init(dev, &tilcdc_crtc->primary);
+	if (ret < 0)
+		goto fail;
+
+	mutex_init(&tilcdc_crtc->enable_lock);
+
+	init_waitqueue_head(&tilcdc_crtc->frame_done_wq);
+
+	spin_lock_init(&tilcdc_crtc->irq_lock);
+	INIT_WORK(&tilcdc_crtc->recover_work, tilcdc_crtc_recover_work);
+
+	ret = drm_crtc_init_with_planes(dev, crtc,
+					&tilcdc_crtc->primary,
+					NULL,
+					&tilcdc_crtc_funcs,
+					"tilcdc crtc");
+	if (ret < 0)
+		goto fail;
+
+	drm_crtc_helper_add(crtc, &tilcdc_crtc_helper_funcs);
+
+	if (priv->is_componentized) {
+		crtc->port = of_graph_get_port_by_id(dev->dev->of_node, 0);
+		if (!crtc->port) { /* This should never happen */
+			dev_err(dev->dev, "Port node not found in %pOF\n",
+				dev->dev->of_node);
+			ret = -EINVAL;
+			goto fail;
+		}
+	}
+
+	priv->crtc = crtc;
+	return 0;
+
+fail:
+	tilcdc_crtc_destroy(crtc);
+	return ret;
+}
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
new file mode 100644
index 000000000..86d34b77b
--- /dev/null
+++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
@@ -0,0 +1,627 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2012 Texas Instruments
+ * Author: Rob Clark <robdclark@gmail.com>
+ */
+
+/* LCDC DRM driver, based on da8xx-fb */
+
+#include <linux/component.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_debugfs.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_gem_dma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_mm.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_vblank.h>
+
+
+#include "tilcdc_drv.h"
+#include "tilcdc_external.h"
+#include "tilcdc_panel.h"
+#include "tilcdc_regs.h"
+
+static LIST_HEAD(module_list);
+
+static const u32 tilcdc_rev1_formats[] = { DRM_FORMAT_RGB565 };
+
+static const u32 tilcdc_straight_formats[] = { DRM_FORMAT_RGB565,
+					       DRM_FORMAT_BGR888,
+					       DRM_FORMAT_XBGR8888 };
+
+static const u32 tilcdc_crossed_formats[] = { DRM_FORMAT_BGR565,
+					      DRM_FORMAT_RGB888,
+					      DRM_FORMAT_XRGB8888 };
+
+static const u32 tilcdc_legacy_formats[] = { DRM_FORMAT_RGB565,
+					     DRM_FORMAT_RGB888,
+					     DRM_FORMAT_XRGB8888 };
+
+void tilcdc_module_init(struct tilcdc_module *mod, const char *name,
+		const struct tilcdc_module_ops *funcs)
+{
+	mod->name = name;
+	mod->funcs = funcs;
+	INIT_LIST_HEAD(&mod->list);
+	list_add(&mod->list, &module_list);
+}
+
+void tilcdc_module_cleanup(struct tilcdc_module *mod)
+{
+	list_del(&mod->list);
+}
+
+static int tilcdc_atomic_check(struct drm_device *dev,
+			       struct drm_atomic_state *state)
+{
+	int ret;
+
+	ret = drm_atomic_helper_check_modeset(dev, state);
+	if (ret)
+		return ret;
+
+	ret = drm_atomic_helper_check_planes(dev, state);
+	if (ret)
+		return ret;
+
+	/*
+	 * tilcdc ->atomic_check can update ->mode_changed if pixel format
+	 * changes, hence will we check modeset changes again.
+	 */
+	ret = drm_atomic_helper_check_modeset(dev, state);
+	if (ret)
+		return ret;
+
+	return ret;
+}
+
+static const struct drm_mode_config_funcs mode_config_funcs = {
+	.fb_create = drm_gem_fb_create,
+	.atomic_check = tilcdc_atomic_check,
+	.atomic_commit = drm_atomic_helper_commit,
+};
+
+static void modeset_init(struct drm_device *dev)
+{
+	struct tilcdc_drm_private *priv = dev->dev_private;
+	struct tilcdc_module *mod;
+
+	list_for_each_entry(mod, &module_list, list) {
+		DBG("loading module: %s", mod->name);
+		mod->funcs->modeset_init(mod, dev);
+	}
+
+	dev->mode_config.min_width = 0;
+	dev->mode_config.min_height = 0;
+	dev->mode_config.max_width = priv->max_width;
+	dev->mode_config.max_height = 2048;
+	dev->mode_config.funcs = &mode_config_funcs;
+}
+
+#ifdef CONFIG_CPU_FREQ
+static int cpufreq_transition(struct notifier_block *nb,
+				     unsigned long val, void *data)
+{
+	struct tilcdc_drm_private *priv = container_of(nb,
+			struct tilcdc_drm_private, freq_transition);
+
+	if (val == CPUFREQ_POSTCHANGE)
+		tilcdc_crtc_update_clk(priv->crtc);
+
+	return 0;
+}
+#endif
+
+static irqreturn_t tilcdc_irq(int irq, void *arg)
+{
+	struct drm_device *dev = arg;
+	struct tilcdc_drm_private *priv = dev->dev_private;
+
+	return tilcdc_crtc_irq(priv->crtc);
+}
+
+static int tilcdc_irq_install(struct drm_device *dev, unsigned int irq)
+{
+	struct tilcdc_drm_private *priv = dev->dev_private;
+	int ret;
+
+	ret = request_irq(irq, tilcdc_irq, 0, dev->driver->name, dev);
+	if (ret)
+		return ret;
+
+	priv->irq_enabled = true;
+
+	return 0;
+}
+
+static void tilcdc_irq_uninstall(struct drm_device *dev)
+{
+	struct tilcdc_drm_private *priv = dev->dev_private;
+
+	if (!priv->irq_enabled)
+		return;
+
+	free_irq(priv->irq, dev);
+	priv->irq_enabled = false;
+}
+
+/*
+ * DRM operations:
+ */
+
+static void tilcdc_fini(struct drm_device *dev)
+{
+	struct tilcdc_drm_private *priv = dev->dev_private;
+
+#ifdef CONFIG_CPU_FREQ
+	if (priv->freq_transition.notifier_call)
+		cpufreq_unregister_notifier(&priv->freq_transition,
+					    CPUFREQ_TRANSITION_NOTIFIER);
+#endif
+
+	if (priv->crtc)
+		tilcdc_crtc_shutdown(priv->crtc);
+
+	if (priv->is_registered)
+		drm_dev_unregister(dev);
+
+	drm_kms_helper_poll_fini(dev);
+	tilcdc_irq_uninstall(dev);
+	drm_mode_config_cleanup(dev);
+
+	if (priv->clk)
+		clk_put(priv->clk);
+
+	if (priv->mmio)
+		iounmap(priv->mmio);
+
+	if (priv->wq)
+		destroy_workqueue(priv->wq);
+
+	dev->dev_private = NULL;
+
+	pm_runtime_disable(dev->dev);
+
+	drm_dev_put(dev);
+}
+
+static int tilcdc_init(const struct drm_driver *ddrv, struct device *dev)
+{
+	struct drm_device *ddev;
+	struct platform_device *pdev = to_platform_device(dev);
+	struct device_node *node = dev->of_node;
+	struct tilcdc_drm_private *priv;
+	struct resource *res;
+	u32 bpp = 0;
+	int ret;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	ddev = drm_dev_alloc(ddrv, dev);
+	if (IS_ERR(ddev))
+		return PTR_ERR(ddev);
+
+	ddev->dev_private = priv;
+	platform_set_drvdata(pdev, ddev);
+	drm_mode_config_init(ddev);
+
+	priv->is_componentized =
+		tilcdc_get_external_components(dev, NULL) > 0;
+
+	priv->wq = alloc_ordered_workqueue("tilcdc", 0);
+	if (!priv->wq) {
+		ret = -ENOMEM;
+		goto init_failed;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(dev, "failed to get memory resource\n");
+		ret = -EINVAL;
+		goto init_failed;
+	}
+
+	priv->mmio = ioremap(res->start, resource_size(res));
+	if (!priv->mmio) {
+		dev_err(dev, "failed to ioremap\n");
+		ret = -ENOMEM;
+		goto init_failed;
+	}
+
+	priv->clk = clk_get(dev, "fck");
+	if (IS_ERR(priv->clk)) {
+		dev_err(dev, "failed to get functional clock\n");
+		ret = -ENODEV;
+		goto init_failed;
+	}
+
+	pm_runtime_enable(dev);
+
+	/* Determine LCD IP Version */
+	pm_runtime_get_sync(dev);
+	switch (tilcdc_read(ddev, LCDC_PID_REG)) {
+	case 0x4c100102:
+		priv->rev = 1;
+		break;
+	case 0x4f200800:
+	case 0x4f201000:
+		priv->rev = 2;
+		break;
+	default:
+		dev_warn(dev, "Unknown PID Reg value 0x%08x, "
+			"defaulting to LCD revision 1\n",
+			tilcdc_read(ddev, LCDC_PID_REG));
+		priv->rev = 1;
+		break;
+	}
+
+	pm_runtime_put_sync(dev);
+
+	if (priv->rev == 1) {
+		DBG("Revision 1 LCDC supports only RGB565 format");
+		priv->pixelformats = tilcdc_rev1_formats;
+		priv->num_pixelformats = ARRAY_SIZE(tilcdc_rev1_formats);
+		bpp = 16;
+	} else {
+		const char *str = "\0";
+
+		of_property_read_string(node, "blue-and-red-wiring", &str);
+		if (0 == strcmp(str, "crossed")) {
+			DBG("Configured for crossed blue and red wires");
+			priv->pixelformats = tilcdc_crossed_formats;
+			priv->num_pixelformats =
+				ARRAY_SIZE(tilcdc_crossed_formats);
+			bpp = 32; /* Choose bpp with RGB support for fbdef */
+		} else if (0 == strcmp(str, "straight")) {
+			DBG("Configured for straight blue and red wires");
+			priv->pixelformats = tilcdc_straight_formats;
+			priv->num_pixelformats =
+				ARRAY_SIZE(tilcdc_straight_formats);
+			bpp = 16; /* Choose bpp with RGB support for fbdef */
+		} else {
+			DBG("Blue and red wiring '%s' unknown, use legacy mode",
+			    str);
+			priv->pixelformats = tilcdc_legacy_formats;
+			priv->num_pixelformats =
+				ARRAY_SIZE(tilcdc_legacy_formats);
+			bpp = 16; /* This is just a guess */
+		}
+	}
+
+	if (of_property_read_u32(node, "max-bandwidth", &priv->max_bandwidth))
+		priv->max_bandwidth = TILCDC_DEFAULT_MAX_BANDWIDTH;
+
+	DBG("Maximum Bandwidth Value %d", priv->max_bandwidth);
+
+	if (of_property_read_u32(node, "max-width", &priv->max_width)) {
+		if (priv->rev == 1)
+			priv->max_width = TILCDC_DEFAULT_MAX_WIDTH_V1;
+		else
+			priv->max_width = TILCDC_DEFAULT_MAX_WIDTH_V2;
+	}
+
+	DBG("Maximum Horizontal Pixel Width Value %dpixels", priv->max_width);
+
+	if (of_property_read_u32(node, "max-pixelclock",
+				 &priv->max_pixelclock))
+		priv->max_pixelclock = TILCDC_DEFAULT_MAX_PIXELCLOCK;
+
+	DBG("Maximum Pixel Clock Value %dKHz", priv->max_pixelclock);
+
+	ret = tilcdc_crtc_create(ddev);
+	if (ret < 0) {
+		dev_err(dev, "failed to create crtc\n");
+		goto init_failed;
+	}
+	modeset_init(ddev);
+
+#ifdef CONFIG_CPU_FREQ
+	priv->freq_transition.notifier_call = cpufreq_transition;
+	ret = cpufreq_register_notifier(&priv->freq_transition,
+			CPUFREQ_TRANSITION_NOTIFIER);
+	if (ret) {
+		dev_err(dev, "failed to register cpufreq notifier\n");
+		priv->freq_transition.notifier_call = NULL;
+		goto init_failed;
+	}
+#endif
+
+	if (priv->is_componentized) {
+		ret = component_bind_all(dev, ddev);
+		if (ret < 0)
+			goto init_failed;
+
+		ret = tilcdc_add_component_encoder(ddev);
+		if (ret < 0)
+			goto init_failed;
+	} else {
+		ret = tilcdc_attach_external_device(ddev);
+		if (ret)
+			goto init_failed;
+	}
+
+	if (!priv->external_connector &&
+	    ((priv->num_encoders == 0) || (priv->num_connectors == 0))) {
+		dev_err(dev, "no encoders/connectors found\n");
+		ret = -EPROBE_DEFER;
+		goto init_failed;
+	}
+
+	ret = drm_vblank_init(ddev, 1);
+	if (ret < 0) {
+		dev_err(dev, "failed to initialize vblank\n");
+		goto init_failed;
+	}
+
+	ret = platform_get_irq(pdev, 0);
+	if (ret < 0)
+		goto init_failed;
+	priv->irq = ret;
+
+	ret = tilcdc_irq_install(ddev, priv->irq);
+	if (ret < 0) {
+		dev_err(dev, "failed to install IRQ handler\n");
+		goto init_failed;
+	}
+
+	drm_mode_config_reset(ddev);
+
+	drm_kms_helper_poll_init(ddev);
+
+	ret = drm_dev_register(ddev, 0);
+	if (ret)
+		goto init_failed;
+	priv->is_registered = true;
+
+	drm_fbdev_generic_setup(ddev, bpp);
+	return 0;
+
+init_failed:
+	tilcdc_fini(ddev);
+
+	return ret;
+}
+
+#if defined(CONFIG_DEBUG_FS)
+static const struct {
+	const char *name;
+	uint8_t  rev;
+	uint8_t  save;
+	uint32_t reg;
+} registers[] =		{
+#define REG(rev, save, reg) { #reg, rev, save, reg }
+		/* exists in revision 1: */
+		REG(1, false, LCDC_PID_REG),
+		REG(1, true,  LCDC_CTRL_REG),
+		REG(1, false, LCDC_STAT_REG),
+		REG(1, true,  LCDC_RASTER_CTRL_REG),
+		REG(1, true,  LCDC_RASTER_TIMING_0_REG),
+		REG(1, true,  LCDC_RASTER_TIMING_1_REG),
+		REG(1, true,  LCDC_RASTER_TIMING_2_REG),
+		REG(1, true,  LCDC_DMA_CTRL_REG),
+		REG(1, true,  LCDC_DMA_FB_BASE_ADDR_0_REG),
+		REG(1, true,  LCDC_DMA_FB_CEILING_ADDR_0_REG),
+		REG(1, true,  LCDC_DMA_FB_BASE_ADDR_1_REG),
+		REG(1, true,  LCDC_DMA_FB_CEILING_ADDR_1_REG),
+		/* new in revision 2: */
+		REG(2, false, LCDC_RAW_STAT_REG),
+		REG(2, false, LCDC_MASKED_STAT_REG),
+		REG(2, true, LCDC_INT_ENABLE_SET_REG),
+		REG(2, false, LCDC_INT_ENABLE_CLR_REG),
+		REG(2, false, LCDC_END_OF_INT_IND_REG),
+		REG(2, true,  LCDC_CLK_ENABLE_REG),
+#undef REG
+};
+
+#endif
+
+#ifdef CONFIG_DEBUG_FS
+static int tilcdc_regs_show(struct seq_file *m, void *arg)
+{
+	struct drm_info_node *node = (struct drm_info_node *) m->private;
+	struct drm_device *dev = node->minor->dev;
+	struct tilcdc_drm_private *priv = dev->dev_private;
+	unsigned i;
+
+	pm_runtime_get_sync(dev->dev);
+
+	seq_printf(m, "revision: %d\n", priv->rev);
+
+	for (i = 0; i < ARRAY_SIZE(registers); i++)
+		if (priv->rev >= registers[i].rev)
+			seq_printf(m, "%s:\t %08x\n", registers[i].name,
+					tilcdc_read(dev, registers[i].reg));
+
+	pm_runtime_put_sync(dev->dev);
+
+	return 0;
+}
+
+static int tilcdc_mm_show(struct seq_file *m, void *arg)
+{
+	struct drm_info_node *node = (struct drm_info_node *) m->private;
+	struct drm_device *dev = node->minor->dev;
+	struct drm_printer p = drm_seq_file_printer(m);
+	drm_mm_print(&dev->vma_offset_manager->vm_addr_space_mm, &p);
+	return 0;
+}
+
+static struct drm_info_list tilcdc_debugfs_list[] = {
+		{ "regs", tilcdc_regs_show, 0, NULL },
+		{ "mm",   tilcdc_mm_show,   0, NULL },
+};
+
+static void tilcdc_debugfs_init(struct drm_minor *minor)
+{
+	struct tilcdc_module *mod;
+
+	drm_debugfs_create_files(tilcdc_debugfs_list,
+				 ARRAY_SIZE(tilcdc_debugfs_list),
+				 minor->debugfs_root, minor);
+
+	list_for_each_entry(mod, &module_list, list)
+		if (mod->funcs->debugfs_init)
+			mod->funcs->debugfs_init(mod, minor);
+}
+#endif
+
+DEFINE_DRM_GEM_DMA_FOPS(fops);
+
+static const struct drm_driver tilcdc_driver = {
+	.driver_features    = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+	DRM_GEM_DMA_DRIVER_OPS,
+#ifdef CONFIG_DEBUG_FS
+	.debugfs_init       = tilcdc_debugfs_init,
+#endif
+	.fops               = &fops,
+	.name               = "tilcdc",
+	.desc               = "TI LCD Controller DRM",
+	.date               = "20121205",
+	.major              = 1,
+	.minor              = 0,
+};
+
+/*
+ * Power management:
+ */
+
+#ifdef CONFIG_PM_SLEEP
+static int tilcdc_pm_suspend(struct device *dev)
+{
+	struct drm_device *ddev = dev_get_drvdata(dev);
+	int ret = 0;
+
+	ret = drm_mode_config_helper_suspend(ddev);
+
+	/* Select sleep pin state */
+	pinctrl_pm_select_sleep_state(dev);
+
+	return ret;
+}
+
+static int tilcdc_pm_resume(struct device *dev)
+{
+	struct drm_device *ddev = dev_get_drvdata(dev);
+
+	/* Select default pin state */
+	pinctrl_pm_select_default_state(dev);
+	return  drm_mode_config_helper_resume(ddev);
+}
+#endif
+
+static const struct dev_pm_ops tilcdc_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(tilcdc_pm_suspend, tilcdc_pm_resume)
+};
+
+/*
+ * Platform driver:
+ */
+static int tilcdc_bind(struct device *dev)
+{
+	return tilcdc_init(&tilcdc_driver, dev);
+}
+
+static void tilcdc_unbind(struct device *dev)
+{
+	struct drm_device *ddev = dev_get_drvdata(dev);
+
+	/* Check if a subcomponent has already triggered the unloading. */
+	if (!ddev->dev_private)
+		return;
+
+	tilcdc_fini(dev_get_drvdata(dev));
+}
+
+static const struct component_master_ops tilcdc_comp_ops = {
+	.bind = tilcdc_bind,
+	.unbind = tilcdc_unbind,
+};
+
+static int tilcdc_pdev_probe(struct platform_device *pdev)
+{
+	struct component_match *match = NULL;
+	int ret;
+
+	/* bail out early if no DT data: */
+	if (!pdev->dev.of_node) {
+		dev_err(&pdev->dev, "device-tree data is missing\n");
+		return -ENXIO;
+	}
+
+	ret = tilcdc_get_external_components(&pdev->dev, &match);
+	if (ret < 0)
+		return ret;
+	else if (ret == 0)
+		return tilcdc_init(&tilcdc_driver, &pdev->dev);
+	else
+		return component_master_add_with_match(&pdev->dev,
+						       &tilcdc_comp_ops,
+						       match);
+}
+
+static int tilcdc_pdev_remove(struct platform_device *pdev)
+{
+	int ret;
+
+	ret = tilcdc_get_external_components(&pdev->dev, NULL);
+	if (ret < 0)
+		return ret;
+	else if (ret == 0)
+		tilcdc_fini(platform_get_drvdata(pdev));
+	else
+		component_master_del(&pdev->dev, &tilcdc_comp_ops);
+
+	return 0;
+}
+
+static const struct of_device_id tilcdc_of_match[] = {
+		{ .compatible = "ti,am33xx-tilcdc", },
+		{ .compatible = "ti,da850-tilcdc", },
+		{ },
+};
+MODULE_DEVICE_TABLE(of, tilcdc_of_match);
+
+static struct platform_driver tilcdc_platform_driver = {
+	.probe      = tilcdc_pdev_probe,
+	.remove     = tilcdc_pdev_remove,
+	.driver     = {
+		.name   = "tilcdc",
+		.pm     = &tilcdc_pm_ops,
+		.of_match_table = tilcdc_of_match,
+	},
+};
+
+static int __init tilcdc_drm_init(void)
+{
+	if (drm_firmware_drivers_only())
+		return -ENODEV;
+
+	DBG("init");
+	tilcdc_panel_init();
+	return platform_driver_register(&tilcdc_platform_driver);
+}
+
+static void __exit tilcdc_drm_fini(void)
+{
+	DBG("fini");
+	platform_driver_unregister(&tilcdc_platform_driver);
+	tilcdc_panel_fini();
+}
+
+module_init(tilcdc_drm_init);
+module_exit(tilcdc_drm_fini);
+
+MODULE_AUTHOR("Rob Clark <robdclark@gmail.com");
+MODULE_DESCRIPTION("TI LCD Controller DRM Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.h b/drivers/gpu/drm/tilcdc/tilcdc_drv.h
new file mode 100644
index 000000000..b818448c8
--- /dev/null
+++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.h
@@ -0,0 +1,173 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2012 Texas Instruments
+ * Author: Rob Clark <robdclark@gmail.com>
+ */
+
+#ifndef __TILCDC_DRV_H__
+#define __TILCDC_DRV_H__
+
+#include <linux/cpufreq.h>
+#include <linux/irqreturn.h>
+
+#include <drm/drm_print.h>
+
+struct clk;
+struct workqueue_struct;
+
+struct drm_connector;
+struct drm_connector_helper_funcs;
+struct drm_crtc;
+struct drm_device;
+struct drm_display_mode;
+struct drm_encoder;
+struct drm_framebuffer;
+struct drm_minor;
+struct drm_pending_vblank_event;
+struct drm_plane;
+
+/* Defaulting to pixel clock defined on AM335x */
+#define TILCDC_DEFAULT_MAX_PIXELCLOCK  126000
+/* Maximum display width for LCDC V1 */
+#define TILCDC_DEFAULT_MAX_WIDTH_V1  1024
+/* ... and for LCDC V2 found on AM335x: */
+#define TILCDC_DEFAULT_MAX_WIDTH_V2  2048
+/*
+ * This may need some tweaking, but want to allow at least 1280x1024@60
+ * with optimized DDR & EMIF settings tweaked 1920x1080@24 appears to
+ * be supportable
+ */
+#define TILCDC_DEFAULT_MAX_BANDWIDTH  (1280*1024*60)
+
+
+struct tilcdc_drm_private {
+	void __iomem *mmio;
+
+	struct clk *clk;         /* functional clock */
+	int rev;                 /* IP revision */
+
+	unsigned int irq;
+
+	/* don't attempt resolutions w/ higher W * H * Hz: */
+	uint32_t max_bandwidth;
+	/*
+	 * Pixel Clock will be restricted to some value as
+	 * defined in the device datasheet measured in KHz
+	 */
+	uint32_t max_pixelclock;
+	/*
+	 * Max allowable width is limited on a per device basis
+	 * measured in pixels
+	 */
+	uint32_t max_width;
+
+	/* Supported pixel formats */
+	const uint32_t *pixelformats;
+	uint32_t num_pixelformats;
+
+#ifdef CONFIG_CPU_FREQ
+	struct notifier_block freq_transition;
+#endif
+
+	struct workqueue_struct *wq;
+
+	struct drm_crtc *crtc;
+
+	unsigned int num_encoders;
+	struct drm_encoder *encoders[8];
+
+	unsigned int num_connectors;
+	struct drm_connector *connectors[8];
+
+	struct drm_encoder *external_encoder;
+	struct drm_connector *external_connector;
+
+	bool is_registered;
+	bool is_componentized;
+	bool irq_enabled;
+};
+
+/* Sub-module for display.  Since we don't know at compile time what panels
+ * or display adapter(s) might be present (for ex, off chip dvi/tfp410,
+ * hdmi encoder, various lcd panels), the connector/encoder(s) are split into
+ * separate drivers.  If they are probed and found to be present, they
+ * register themselves with tilcdc_register_module().
+ */
+struct tilcdc_module;
+
+struct tilcdc_module_ops {
+	/* create appropriate encoders/connectors: */
+	int (*modeset_init)(struct tilcdc_module *mod, struct drm_device *dev);
+#ifdef CONFIG_DEBUG_FS
+	/* create debugfs nodes (can be NULL): */
+	int (*debugfs_init)(struct tilcdc_module *mod, struct drm_minor *minor);
+#endif
+};
+
+struct tilcdc_module {
+	const char *name;
+	struct list_head list;
+	const struct tilcdc_module_ops *funcs;
+};
+
+void tilcdc_module_init(struct tilcdc_module *mod, const char *name,
+		const struct tilcdc_module_ops *funcs);
+void tilcdc_module_cleanup(struct tilcdc_module *mod);
+
+/* Panel config that needs to be set in the crtc, but is not coming from
+ * the mode timings.  The display module is expected to call
+ * tilcdc_crtc_set_panel_info() to set this during modeset.
+ */
+struct tilcdc_panel_info {
+
+	/* AC Bias Pin Frequency */
+	uint32_t ac_bias;
+
+	/* AC Bias Pin Transitions per Interrupt */
+	uint32_t ac_bias_intrpt;
+
+	/* DMA burst size */
+	uint32_t dma_burst_sz;
+
+	/* Bits per pixel */
+	uint32_t bpp;
+
+	/* FIFO DMA Request Delay */
+	uint32_t fdd;
+
+	/* TFT Alternative Signal Mapping (Only for active) */
+	bool tft_alt_mode;
+
+	/* Invert pixel clock */
+	bool invert_pxl_clk;
+
+	/* Horizontal and Vertical Sync Edge: 0=rising 1=falling */
+	uint32_t sync_edge;
+
+	/* Horizontal and Vertical Sync: Control: 0=ignore */
+	uint32_t sync_ctrl;
+
+	/* Raster Data Order Select: 1=Most-to-least 0=Least-to-most */
+	uint32_t raster_order;
+
+	/* DMA FIFO threshold */
+	uint32_t fifo_th;
+};
+
+#define DBG(fmt, ...) DRM_DEBUG(fmt"\n", ##__VA_ARGS__)
+
+int tilcdc_crtc_create(struct drm_device *dev);
+irqreturn_t tilcdc_crtc_irq(struct drm_crtc *crtc);
+void tilcdc_crtc_update_clk(struct drm_crtc *crtc);
+void tilcdc_crtc_set_panel_info(struct drm_crtc *crtc,
+		const struct tilcdc_panel_info *info);
+void tilcdc_crtc_set_simulate_vesa_sync(struct drm_crtc *crtc,
+					bool simulate_vesa_sync);
+void tilcdc_crtc_shutdown(struct drm_crtc *crtc);
+int tilcdc_crtc_update_fb(struct drm_crtc *crtc,
+		struct drm_framebuffer *fb,
+		struct drm_pending_vblank_event *event);
+
+int tilcdc_plane_init(struct drm_device *dev, struct drm_plane *plane);
+
+#endif /* __TILCDC_DRV_H__ */
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_external.c b/drivers/gpu/drm/tilcdc/tilcdc_external.c
new file mode 100644
index 000000000..3b86d002e
--- /dev/null
+++ b/drivers/gpu/drm/tilcdc/tilcdc_external.c
@@ -0,0 +1,179 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2015 Texas Instruments
+ * Author: Jyri Sarha <jsarha@ti.com>
+ */
+
+#include <linux/component.h>
+#include <linux/of_graph.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_of.h>
+#include <drm/drm_simple_kms_helper.h>
+
+#include "tilcdc_drv.h"
+#include "tilcdc_external.h"
+
+static const struct tilcdc_panel_info panel_info_tda998x = {
+		.ac_bias                = 255,
+		.ac_bias_intrpt         = 0,
+		.dma_burst_sz           = 16,
+		.bpp                    = 16,
+		.fdd                    = 0x80,
+		.tft_alt_mode           = 0,
+		.invert_pxl_clk		= 1,
+		.sync_edge              = 1,
+		.sync_ctrl              = 1,
+		.raster_order           = 0,
+};
+
+static const struct tilcdc_panel_info panel_info_default = {
+		.ac_bias                = 255,
+		.ac_bias_intrpt         = 0,
+		.dma_burst_sz           = 16,
+		.bpp                    = 16,
+		.fdd                    = 0x80,
+		.tft_alt_mode           = 0,
+		.sync_edge              = 0,
+		.sync_ctrl              = 1,
+		.raster_order           = 0,
+};
+
+static
+struct drm_connector *tilcdc_encoder_find_connector(struct drm_device *ddev,
+						    struct drm_encoder *encoder)
+{
+	struct drm_connector *connector;
+
+	list_for_each_entry(connector, &ddev->mode_config.connector_list, head) {
+		if (drm_connector_has_possible_encoder(connector, encoder))
+			return connector;
+	}
+
+	dev_err(ddev->dev, "No connector found for %s encoder (id %d)\n",
+		encoder->name, encoder->base.id);
+
+	return NULL;
+}
+
+int tilcdc_add_component_encoder(struct drm_device *ddev)
+{
+	struct tilcdc_drm_private *priv = ddev->dev_private;
+	struct drm_encoder *encoder = NULL, *iter;
+
+	list_for_each_entry(iter, &ddev->mode_config.encoder_list, head)
+		if (iter->possible_crtcs & (1 << priv->crtc->index)) {
+			encoder = iter;
+			break;
+		}
+
+	if (!encoder) {
+		dev_err(ddev->dev, "%s: No suitable encoder found\n", __func__);
+		return -ENODEV;
+	}
+
+	priv->external_connector =
+		tilcdc_encoder_find_connector(ddev, encoder);
+
+	if (!priv->external_connector)
+		return -ENODEV;
+
+	/* Only tda998x is supported at the moment. */
+	tilcdc_crtc_set_simulate_vesa_sync(priv->crtc, true);
+	tilcdc_crtc_set_panel_info(priv->crtc, &panel_info_tda998x);
+
+	return 0;
+}
+
+static
+int tilcdc_attach_bridge(struct drm_device *ddev, struct drm_bridge *bridge)
+{
+	struct tilcdc_drm_private *priv = ddev->dev_private;
+	int ret;
+
+	priv->external_encoder->possible_crtcs = BIT(0);
+
+	ret = drm_bridge_attach(priv->external_encoder, bridge, NULL, 0);
+	if (ret)
+		return ret;
+
+	tilcdc_crtc_set_panel_info(priv->crtc, &panel_info_default);
+
+	priv->external_connector =
+		tilcdc_encoder_find_connector(ddev, priv->external_encoder);
+	if (!priv->external_connector)
+		return -ENODEV;
+
+	return 0;
+}
+
+int tilcdc_attach_external_device(struct drm_device *ddev)
+{
+	struct tilcdc_drm_private *priv = ddev->dev_private;
+	struct drm_bridge *bridge;
+	struct drm_panel *panel;
+	int ret;
+
+	ret = drm_of_find_panel_or_bridge(ddev->dev->of_node, 0, 0,
+					  &panel, &bridge);
+	if (ret == -ENODEV)
+		return 0;
+	else if (ret)
+		return ret;
+
+	priv->external_encoder = devm_kzalloc(ddev->dev,
+					      sizeof(*priv->external_encoder),
+					      GFP_KERNEL);
+	if (!priv->external_encoder)
+		return -ENOMEM;
+
+	ret = drm_simple_encoder_init(ddev, priv->external_encoder,
+				      DRM_MODE_ENCODER_NONE);
+	if (ret) {
+		dev_err(ddev->dev, "drm_encoder_init() failed %d\n", ret);
+		return ret;
+	}
+
+	if (panel) {
+		bridge = devm_drm_panel_bridge_add_typed(ddev->dev, panel,
+							 DRM_MODE_CONNECTOR_DPI);
+		if (IS_ERR(bridge)) {
+			ret = PTR_ERR(bridge);
+			goto err_encoder_cleanup;
+		}
+	}
+
+	ret = tilcdc_attach_bridge(ddev, bridge);
+	if (ret)
+		goto err_encoder_cleanup;
+
+	return 0;
+
+err_encoder_cleanup:
+	drm_encoder_cleanup(priv->external_encoder);
+	return ret;
+}
+
+static int dev_match_of(struct device *dev, void *data)
+{
+	return dev->of_node == data;
+}
+
+int tilcdc_get_external_components(struct device *dev,
+				   struct component_match **match)
+{
+	struct device_node *node;
+
+	node = of_graph_get_remote_node(dev->of_node, 0, 0);
+
+	if (!of_device_is_compatible(node, "nxp,tda998x")) {
+		of_node_put(node);
+		return 0;
+	}
+
+	if (match)
+		drm_of_component_match_add(dev, match, dev_match_of, node);
+	of_node_put(node);
+	return 1;
+}
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_external.h b/drivers/gpu/drm/tilcdc/tilcdc_external.h
new file mode 100644
index 000000000..fb4476694
--- /dev/null
+++ b/drivers/gpu/drm/tilcdc/tilcdc_external.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2015 Texas Instruments
+ * Author: Jyri Sarha <jsarha@ti.com>
+ */
+
+#ifndef __TILCDC_EXTERNAL_H__
+#define __TILCDC_EXTERNAL_H__
+
+int tilcdc_add_component_encoder(struct drm_device *dev);
+int tilcdc_get_external_components(struct device *dev,
+				   struct component_match **match);
+int tilcdc_attach_external_device(struct drm_device *ddev);
+#endif /* __TILCDC_SLAVE_H__ */
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_panel.c b/drivers/gpu/drm/tilcdc/tilcdc_panel.c
new file mode 100644
index 000000000..2729e16bc
--- /dev/null
+++ b/drivers/gpu/drm/tilcdc/tilcdc_panel.c
@@ -0,0 +1,416 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2012 Texas Instruments
+ * Author: Rob Clark <robdclark@gmail.com>
+ */
+
+#include <linux/backlight.h>
+#include <linux/gpio/consumer.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/platform_device.h>
+
+#include <video/display_timing.h>
+#include <video/of_display_timing.h>
+#include <video/videomode.h>
+
+#include <drm/drm_atomic_state_helper.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_modeset_helper_vtables.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_simple_kms_helper.h>
+
+#include "tilcdc_drv.h"
+#include "tilcdc_panel.h"
+
+struct panel_module {
+	struct tilcdc_module base;
+	struct tilcdc_panel_info *info;
+	struct display_timings *timings;
+	struct backlight_device *backlight;
+	struct gpio_desc *enable_gpio;
+};
+#define to_panel_module(x) container_of(x, struct panel_module, base)
+
+
+/*
+ * Encoder:
+ */
+
+struct panel_encoder {
+	struct drm_encoder base;
+	struct panel_module *mod;
+};
+#define to_panel_encoder(x) container_of(x, struct panel_encoder, base)
+
+static void panel_encoder_dpms(struct drm_encoder *encoder, int mode)
+{
+	struct panel_encoder *panel_encoder = to_panel_encoder(encoder);
+	struct backlight_device *backlight = panel_encoder->mod->backlight;
+	struct gpio_desc *gpio = panel_encoder->mod->enable_gpio;
+
+	if (backlight) {
+		backlight->props.power = mode == DRM_MODE_DPMS_ON ?
+					 FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
+		backlight_update_status(backlight);
+	}
+
+	if (gpio)
+		gpiod_set_value_cansleep(gpio,
+					 mode == DRM_MODE_DPMS_ON ? 1 : 0);
+}
+
+static void panel_encoder_prepare(struct drm_encoder *encoder)
+{
+	panel_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
+}
+
+static void panel_encoder_commit(struct drm_encoder *encoder)
+{
+	panel_encoder_dpms(encoder, DRM_MODE_DPMS_ON);
+}
+
+static void panel_encoder_mode_set(struct drm_encoder *encoder,
+		struct drm_display_mode *mode,
+		struct drm_display_mode *adjusted_mode)
+{
+	/* nothing needed */
+}
+
+static const struct drm_encoder_helper_funcs panel_encoder_helper_funcs = {
+		.dpms           = panel_encoder_dpms,
+		.prepare        = panel_encoder_prepare,
+		.commit         = panel_encoder_commit,
+		.mode_set       = panel_encoder_mode_set,
+};
+
+static struct drm_encoder *panel_encoder_create(struct drm_device *dev,
+		struct panel_module *mod)
+{
+	struct panel_encoder *panel_encoder;
+	struct drm_encoder *encoder;
+	int ret;
+
+	panel_encoder = devm_kzalloc(dev->dev, sizeof(*panel_encoder),
+				     GFP_KERNEL);
+	if (!panel_encoder)
+		return NULL;
+
+	panel_encoder->mod = mod;
+
+	encoder = &panel_encoder->base;
+	encoder->possible_crtcs = 1;
+
+	ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_LVDS);
+	if (ret < 0)
+		goto fail;
+
+	drm_encoder_helper_add(encoder, &panel_encoder_helper_funcs);
+
+	return encoder;
+
+fail:
+	drm_encoder_cleanup(encoder);
+	return NULL;
+}
+
+/*
+ * Connector:
+ */
+
+struct panel_connector {
+	struct drm_connector base;
+
+	struct drm_encoder *encoder;  /* our connected encoder */
+	struct panel_module *mod;
+};
+#define to_panel_connector(x) container_of(x, struct panel_connector, base)
+
+
+static void panel_connector_destroy(struct drm_connector *connector)
+{
+	drm_connector_unregister(connector);
+	drm_connector_cleanup(connector);
+}
+
+static int panel_connector_get_modes(struct drm_connector *connector)
+{
+	struct drm_device *dev = connector->dev;
+	struct panel_connector *panel_connector = to_panel_connector(connector);
+	struct display_timings *timings = panel_connector->mod->timings;
+	int i;
+
+	for (i = 0; i < timings->num_timings; i++) {
+		struct drm_display_mode *mode;
+		struct videomode vm;
+
+		if (videomode_from_timings(timings, &vm, i))
+			break;
+
+		mode = drm_mode_create(dev);
+		if (!mode)
+			break;
+
+		drm_display_mode_from_videomode(&vm, mode);
+
+		mode->type = DRM_MODE_TYPE_DRIVER;
+
+		if (timings->native_mode == i)
+			mode->type |= DRM_MODE_TYPE_PREFERRED;
+
+		drm_mode_set_name(mode);
+		drm_mode_probed_add(connector, mode);
+	}
+
+	return i;
+}
+
+static struct drm_encoder *panel_connector_best_encoder(
+		struct drm_connector *connector)
+{
+	struct panel_connector *panel_connector = to_panel_connector(connector);
+	return panel_connector->encoder;
+}
+
+static const struct drm_connector_funcs panel_connector_funcs = {
+	.destroy            = panel_connector_destroy,
+	.fill_modes         = drm_helper_probe_single_connector_modes,
+	.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 const struct drm_connector_helper_funcs panel_connector_helper_funcs = {
+	.get_modes          = panel_connector_get_modes,
+	.best_encoder       = panel_connector_best_encoder,
+};
+
+static struct drm_connector *panel_connector_create(struct drm_device *dev,
+		struct panel_module *mod, struct drm_encoder *encoder)
+{
+	struct panel_connector *panel_connector;
+	struct drm_connector *connector;
+	int ret;
+
+	panel_connector = devm_kzalloc(dev->dev, sizeof(*panel_connector),
+				       GFP_KERNEL);
+	if (!panel_connector)
+		return NULL;
+
+	panel_connector->encoder = encoder;
+	panel_connector->mod = mod;
+
+	connector = &panel_connector->base;
+
+	drm_connector_init(dev, connector, &panel_connector_funcs,
+			DRM_MODE_CONNECTOR_LVDS);
+	drm_connector_helper_add(connector, &panel_connector_helper_funcs);
+
+	connector->interlace_allowed = 0;
+	connector->doublescan_allowed = 0;
+
+	ret = drm_connector_attach_encoder(connector, encoder);
+	if (ret)
+		goto fail;
+
+	return connector;
+
+fail:
+	panel_connector_destroy(connector);
+	return NULL;
+}
+
+/*
+ * Module:
+ */
+
+static int panel_modeset_init(struct tilcdc_module *mod, struct drm_device *dev)
+{
+	struct panel_module *panel_mod = to_panel_module(mod);
+	struct tilcdc_drm_private *priv = dev->dev_private;
+	struct drm_encoder *encoder;
+	struct drm_connector *connector;
+
+	encoder = panel_encoder_create(dev, panel_mod);
+	if (!encoder)
+		return -ENOMEM;
+
+	connector = panel_connector_create(dev, panel_mod, encoder);
+	if (!connector)
+		return -ENOMEM;
+
+	priv->encoders[priv->num_encoders++] = encoder;
+	priv->connectors[priv->num_connectors++] = connector;
+
+	tilcdc_crtc_set_panel_info(priv->crtc,
+				   to_panel_encoder(encoder)->mod->info);
+
+	return 0;
+}
+
+static const struct tilcdc_module_ops panel_module_ops = {
+		.modeset_init = panel_modeset_init,
+};
+
+/*
+ * Device:
+ */
+
+/* maybe move this somewhere common if it is needed by other outputs? */
+static struct tilcdc_panel_info *of_get_panel_info(struct device_node *np)
+{
+	struct device_node *info_np;
+	struct tilcdc_panel_info *info;
+	int ret = 0;
+
+	if (!np) {
+		pr_err("%s: no devicenode given\n", __func__);
+		return NULL;
+	}
+
+	info_np = of_get_child_by_name(np, "panel-info");
+	if (!info_np) {
+		pr_err("%s: could not find panel-info node\n", __func__);
+		return NULL;
+	}
+
+	info = kzalloc(sizeof(*info), GFP_KERNEL);
+	if (!info)
+		goto put_node;
+
+	ret |= of_property_read_u32(info_np, "ac-bias", &info->ac_bias);
+	ret |= of_property_read_u32(info_np, "ac-bias-intrpt", &info->ac_bias_intrpt);
+	ret |= of_property_read_u32(info_np, "dma-burst-sz", &info->dma_burst_sz);
+	ret |= of_property_read_u32(info_np, "bpp", &info->bpp);
+	ret |= of_property_read_u32(info_np, "fdd", &info->fdd);
+	ret |= of_property_read_u32(info_np, "sync-edge", &info->sync_edge);
+	ret |= of_property_read_u32(info_np, "sync-ctrl", &info->sync_ctrl);
+	ret |= of_property_read_u32(info_np, "raster-order", &info->raster_order);
+	ret |= of_property_read_u32(info_np, "fifo-th", &info->fifo_th);
+
+	/* optional: */
+	info->tft_alt_mode      = of_property_read_bool(info_np, "tft-alt-mode");
+	info->invert_pxl_clk    = of_property_read_bool(info_np, "invert-pxl-clk");
+
+	if (ret) {
+		pr_err("%s: error reading panel-info properties\n", __func__);
+		kfree(info);
+		info = NULL;
+	}
+
+put_node:
+	of_node_put(info_np);
+	return info;
+}
+
+static int panel_probe(struct platform_device *pdev)
+{
+	struct device_node *node = pdev->dev.of_node;
+	struct backlight_device *backlight;
+	struct panel_module *panel_mod;
+	struct tilcdc_module *mod;
+	struct pinctrl *pinctrl;
+	int ret;
+
+	/* bail out early if no DT data: */
+	if (!node) {
+		dev_err(&pdev->dev, "device-tree data is missing\n");
+		return -ENXIO;
+	}
+
+	panel_mod = devm_kzalloc(&pdev->dev, sizeof(*panel_mod), GFP_KERNEL);
+	if (!panel_mod)
+		return -ENOMEM;
+
+	backlight = devm_of_find_backlight(&pdev->dev);
+	if (IS_ERR(backlight))
+		return PTR_ERR(backlight);
+	panel_mod->backlight = backlight;
+
+	panel_mod->enable_gpio = devm_gpiod_get_optional(&pdev->dev, "enable",
+							 GPIOD_OUT_LOW);
+	if (IS_ERR(panel_mod->enable_gpio)) {
+		ret = PTR_ERR(panel_mod->enable_gpio);
+		dev_err(&pdev->dev, "failed to request enable GPIO\n");
+		goto fail_backlight;
+	}
+
+	if (panel_mod->enable_gpio)
+		dev_info(&pdev->dev, "found enable GPIO\n");
+
+	mod = &panel_mod->base;
+	pdev->dev.platform_data = mod;
+
+	tilcdc_module_init(mod, "panel", &panel_module_ops);
+
+	pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
+	if (IS_ERR(pinctrl))
+		dev_warn(&pdev->dev, "pins are not configured\n");
+
+	panel_mod->timings = of_get_display_timings(node);
+	if (!panel_mod->timings) {
+		dev_err(&pdev->dev, "could not get panel timings\n");
+		ret = -EINVAL;
+		goto fail_free;
+	}
+
+	panel_mod->info = of_get_panel_info(node);
+	if (!panel_mod->info) {
+		dev_err(&pdev->dev, "could not get panel info\n");
+		ret = -EINVAL;
+		goto fail_timings;
+	}
+
+	return 0;
+
+fail_timings:
+	display_timings_release(panel_mod->timings);
+
+fail_free:
+	tilcdc_module_cleanup(mod);
+
+fail_backlight:
+	if (panel_mod->backlight)
+		put_device(&panel_mod->backlight->dev);
+	return ret;
+}
+
+static int panel_remove(struct platform_device *pdev)
+{
+	struct tilcdc_module *mod = dev_get_platdata(&pdev->dev);
+	struct panel_module *panel_mod = to_panel_module(mod);
+	struct backlight_device *backlight = panel_mod->backlight;
+
+	if (backlight)
+		put_device(&backlight->dev);
+
+	display_timings_release(panel_mod->timings);
+
+	tilcdc_module_cleanup(mod);
+	kfree(panel_mod->info);
+
+	return 0;
+}
+
+static const struct of_device_id panel_of_match[] = {
+		{ .compatible = "ti,tilcdc,panel", },
+		{ },
+};
+
+static struct platform_driver panel_driver = {
+	.probe = panel_probe,
+	.remove = panel_remove,
+	.driver = {
+		.name = "tilcdc-panel",
+		.of_match_table = panel_of_match,
+	},
+};
+
+int __init tilcdc_panel_init(void)
+{
+	return platform_driver_register(&panel_driver);
+}
+
+void __exit tilcdc_panel_fini(void)
+{
+	platform_driver_unregister(&panel_driver);
+}
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_panel.h b/drivers/gpu/drm/tilcdc/tilcdc_panel.h
new file mode 100644
index 000000000..65d735d77
--- /dev/null
+++ b/drivers/gpu/drm/tilcdc/tilcdc_panel.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2012 Texas Instruments
+ * Author: Rob Clark <robdclark@gmail.com>
+ */
+
+#ifndef __TILCDC_PANEL_H__
+#define __TILCDC_PANEL_H__
+
+/* sub-module for generic lcd panel output */
+
+int tilcdc_panel_init(void);
+void tilcdc_panel_fini(void);
+
+#endif /* __TILCDC_PANEL_H__ */
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_plane.c b/drivers/gpu/drm/tilcdc/tilcdc_plane.c
new file mode 100644
index 000000000..cf77a8ce7
--- /dev/null
+++ b/drivers/gpu/drm/tilcdc/tilcdc_plane.c
@@ -0,0 +1,120 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2015 Texas Instruments
+ * Author: Jyri Sarha <jsarha@ti.com>
+ */
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_framebuffer.h>
+
+#include "tilcdc_drv.h"
+
+static const struct drm_plane_funcs tilcdc_plane_funcs = {
+	.update_plane	= drm_atomic_helper_update_plane,
+	.disable_plane	= drm_atomic_helper_disable_plane,
+	.destroy	= drm_plane_cleanup,
+	.reset		= drm_atomic_helper_plane_reset,
+	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
+};
+
+static int tilcdc_plane_atomic_check(struct drm_plane *plane,
+				     struct drm_atomic_state *state)
+{
+	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
+									   plane);
+	struct drm_crtc_state *crtc_state;
+	struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
+									   plane);
+	unsigned int pitch;
+
+	if (!new_state->crtc)
+		return 0;
+
+	if (WARN_ON(!new_state->fb))
+		return -EINVAL;
+
+	if (new_state->crtc_x || new_state->crtc_y) {
+		dev_err(plane->dev->dev, "%s: crtc position must be zero.",
+			__func__);
+		return -EINVAL;
+	}
+
+	crtc_state = drm_atomic_get_existing_crtc_state(state,
+							new_state->crtc);
+	/* we should have a crtc state if the plane is attached to a crtc */
+	if (WARN_ON(!crtc_state))
+		return 0;
+
+	if (crtc_state->mode.hdisplay != new_state->crtc_w ||
+	    crtc_state->mode.vdisplay != new_state->crtc_h) {
+		dev_err(plane->dev->dev,
+			"%s: Size must match mode (%dx%d == %dx%d)", __func__,
+			crtc_state->mode.hdisplay, crtc_state->mode.vdisplay,
+			new_state->crtc_w, new_state->crtc_h);
+		return -EINVAL;
+	}
+
+	pitch = crtc_state->mode.hdisplay *
+		new_state->fb->format->cpp[0];
+	if (new_state->fb->pitches[0] != pitch) {
+		dev_err(plane->dev->dev,
+			"Invalid pitch: fb and crtc widths must be the same");
+		return -EINVAL;
+	}
+
+	if (old_state->fb && new_state->fb->format != old_state->fb->format) {
+		dev_dbg(plane->dev->dev,
+			"%s(): pixel format change requires mode_change\n",
+			__func__);
+		crtc_state->mode_changed = true;
+	}
+
+	return 0;
+}
+
+static void tilcdc_plane_atomic_update(struct drm_plane *plane,
+				       struct drm_atomic_state *state)
+{
+	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
+									   plane);
+
+	if (!new_state->crtc)
+		return;
+
+	if (WARN_ON(!new_state->fb || !new_state->crtc->state))
+		return;
+
+	if (tilcdc_crtc_update_fb(new_state->crtc,
+				  new_state->fb,
+				  new_state->crtc->state->event) == 0) {
+		new_state->crtc->state->event = NULL;
+	}
+}
+
+static const struct drm_plane_helper_funcs plane_helper_funcs = {
+	.atomic_check = tilcdc_plane_atomic_check,
+	.atomic_update = tilcdc_plane_atomic_update,
+};
+
+int tilcdc_plane_init(struct drm_device *dev,
+		      struct drm_plane *plane)
+{
+	struct tilcdc_drm_private *priv = dev->dev_private;
+	int ret;
+
+	ret = drm_universal_plane_init(dev, plane, 1, &tilcdc_plane_funcs,
+				       priv->pixelformats,
+				       priv->num_pixelformats,
+				       NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
+	if (ret) {
+		dev_err(dev->dev, "Failed to initialize plane: %d\n", ret);
+		return ret;
+	}
+
+	drm_plane_helper_add(plane, &plane_helper_funcs);
+
+	return 0;
+}
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_regs.h b/drivers/gpu/drm/tilcdc/tilcdc_regs.h
new file mode 100644
index 000000000..f90e2dc34
--- /dev/null
+++ b/drivers/gpu/drm/tilcdc/tilcdc_regs.h
@@ -0,0 +1,173 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2012 Texas Instruments
+ * Author: Rob Clark <robdclark@gmail.com>
+ */
+
+#ifndef __TILCDC_REGS_H__
+#define __TILCDC_REGS_H__
+
+/* LCDC register definitions, based on da8xx-fb */
+
+#include <linux/bitops.h>
+
+#include "tilcdc_drv.h"
+
+/* LCDC Status Register */
+#define LCDC_END_OF_FRAME1                       BIT(9)
+#define LCDC_END_OF_FRAME0                       BIT(8)
+#define LCDC_PL_LOAD_DONE                        BIT(6)
+#define LCDC_FIFO_UNDERFLOW                      BIT(5)
+#define LCDC_SYNC_LOST                           BIT(2)
+#define LCDC_FRAME_DONE                          BIT(0)
+
+/* LCDC DMA Control Register */
+#define LCDC_DMA_BURST_SIZE(x)                   ((x) << 4)
+#define LCDC_DMA_BURST_SIZE_MASK                 ((0x7) << 4)
+#define LCDC_DMA_BURST_1                         0x0
+#define LCDC_DMA_BURST_2                         0x1
+#define LCDC_DMA_BURST_4                         0x2
+#define LCDC_DMA_BURST_8                         0x3
+#define LCDC_DMA_BURST_16                        0x4
+#define LCDC_DMA_FIFO_THRESHOLD(x)               ((x) << 8)
+#define LCDC_DMA_FIFO_THRESHOLD_MASK             ((0x3) << 8)
+#define LCDC_V1_END_OF_FRAME_INT_ENA             BIT(2)
+#define LCDC_V2_END_OF_FRAME0_INT_ENA            BIT(8)
+#define LCDC_V2_END_OF_FRAME1_INT_ENA            BIT(9)
+#define LCDC_DUAL_FRAME_BUFFER_ENABLE            BIT(0)
+
+/* LCDC Control Register */
+#define LCDC_CLK_DIVISOR(x)                      ((x) << 8)
+#define LCDC_CLK_DIVISOR_MASK                    ((0xFF) << 8)
+#define LCDC_RASTER_MODE                         0x01
+
+/* LCDC Raster Control Register */
+#define LCDC_PALETTE_LOAD_MODE(x)                ((x) << 20)
+#define LCDC_PALETTE_LOAD_MODE_MASK              ((0x3) << 20)
+#define PALETTE_AND_DATA                         0x00
+#define PALETTE_ONLY                             0x01
+#define DATA_ONLY                                0x02
+
+#define LCDC_MONO_8BIT_MODE                      BIT(9)
+#define LCDC_RASTER_ORDER                        BIT(8)
+#define LCDC_TFT_MODE                            BIT(7)
+#define LCDC_V1_UNDERFLOW_INT_ENA                BIT(6)
+#define LCDC_V2_UNDERFLOW_INT_ENA                BIT(5)
+#define LCDC_V1_PL_INT_ENA                       BIT(4)
+#define LCDC_V2_PL_INT_ENA                       BIT(6)
+#define LCDC_V1_SYNC_LOST_INT_ENA                BIT(5)
+#define LCDC_V1_FRAME_DONE_INT_ENA               BIT(3)
+#define LCDC_MONOCHROME_MODE                     BIT(1)
+#define LCDC_RASTER_ENABLE                       BIT(0)
+#define LCDC_TFT_ALT_ENABLE                      BIT(23)
+#define LCDC_STN_565_ENABLE                      BIT(24)
+#define LCDC_V2_DMA_CLK_EN                       BIT(2)
+#define LCDC_V2_LIDD_CLK_EN                      BIT(1)
+#define LCDC_V2_CORE_CLK_EN                      BIT(0)
+#define LCDC_V2_LPP_B10                          26
+#define LCDC_V2_TFT_24BPP_MODE                   BIT(25)
+#define LCDC_V2_TFT_24BPP_UNPACK                 BIT(26)
+
+/* LCDC Raster Timing 2 Register */
+#define LCDC_AC_BIAS_TRANSITIONS_PER_INT(x)      ((x) << 16)
+#define LCDC_AC_BIAS_TRANSITIONS_PER_INT_MASK    ((0xF) << 16)
+#define LCDC_AC_BIAS_FREQUENCY(x)                ((x) << 8)
+#define LCDC_AC_BIAS_FREQUENCY_MASK              ((0xFF) << 8)
+#define LCDC_SYNC_CTRL                           BIT(25)
+#define LCDC_SYNC_EDGE                           BIT(24)
+#define LCDC_INVERT_PIXEL_CLOCK                  BIT(22)
+#define LCDC_INVERT_HSYNC                        BIT(21)
+#define LCDC_INVERT_VSYNC                        BIT(20)
+#define LCDC_LPP_B10                             BIT(26)
+
+/* LCDC Block */
+#define LCDC_PID_REG                             0x0
+#define LCDC_CTRL_REG                            0x4
+#define LCDC_STAT_REG                            0x8
+#define LCDC_RASTER_CTRL_REG                     0x28
+#define LCDC_RASTER_TIMING_0_REG                 0x2c
+#define LCDC_RASTER_TIMING_1_REG                 0x30
+#define LCDC_RASTER_TIMING_2_REG                 0x34
+#define LCDC_DMA_CTRL_REG                        0x40
+#define LCDC_DMA_FB_BASE_ADDR_0_REG              0x44
+#define LCDC_DMA_FB_CEILING_ADDR_0_REG           0x48
+#define LCDC_DMA_FB_BASE_ADDR_1_REG              0x4c
+#define LCDC_DMA_FB_CEILING_ADDR_1_REG           0x50
+
+/* Interrupt Registers available only in Version 2 */
+#define LCDC_RAW_STAT_REG                        0x58
+#define LCDC_MASKED_STAT_REG                     0x5c
+#define LCDC_INT_ENABLE_SET_REG                  0x60
+#define LCDC_INT_ENABLE_CLR_REG                  0x64
+#define LCDC_END_OF_INT_IND_REG                  0x68
+
+/* Clock registers available only on Version 2 */
+#define LCDC_CLK_ENABLE_REG                      0x6c
+#define LCDC_CLK_RESET_REG                       0x70
+#define LCDC_CLK_MAIN_RESET                      BIT(3)
+
+
+/*
+ * Helpers:
+ */
+
+static inline void tilcdc_write(struct drm_device *dev, u32 reg, u32 data)
+{
+	struct tilcdc_drm_private *priv = dev->dev_private;
+	iowrite32(data, priv->mmio + reg);
+}
+
+static inline void tilcdc_write64(struct drm_device *dev, u32 reg, u64 data)
+{
+	struct tilcdc_drm_private *priv = dev->dev_private;
+	volatile void __iomem *addr = priv->mmio + reg;
+
+#if defined(iowrite64) && !defined(iowrite64_is_nonatomic)
+	iowrite64(data, addr);
+#else
+	__iowmb();
+	/* This compiles to strd (=64-bit write) on ARM7 */
+	*(volatile u64 __force *)addr = __cpu_to_le64(data);
+#endif
+}
+
+static inline u32 tilcdc_read(struct drm_device *dev, u32 reg)
+{
+	struct tilcdc_drm_private *priv = dev->dev_private;
+	return ioread32(priv->mmio + reg);
+}
+
+static inline void tilcdc_write_mask(struct drm_device *dev, u32 reg,
+				     u32 val, u32 mask)
+{
+	tilcdc_write(dev, reg, (tilcdc_read(dev, reg) & ~mask) | (val & mask));
+}
+
+static inline void tilcdc_set(struct drm_device *dev, u32 reg, u32 mask)
+{
+	tilcdc_write(dev, reg, tilcdc_read(dev, reg) | mask);
+}
+
+static inline void tilcdc_clear(struct drm_device *dev, u32 reg, u32 mask)
+{
+	tilcdc_write(dev, reg, tilcdc_read(dev, reg) & ~mask);
+}
+
+/* the register to read/clear irqstatus differs between v1 and v2 of the IP */
+static inline u32 tilcdc_irqstatus_reg(struct drm_device *dev)
+{
+	struct tilcdc_drm_private *priv = dev->dev_private;
+	return (priv->rev == 2) ? LCDC_MASKED_STAT_REG : LCDC_STAT_REG;
+}
+
+static inline u32 tilcdc_read_irqstatus(struct drm_device *dev)
+{
+	return tilcdc_read(dev, tilcdc_irqstatus_reg(dev));
+}
+
+static inline void tilcdc_clear_irqstatus(struct drm_device *dev, u32 mask)
+{
+	tilcdc_write(dev, tilcdc_irqstatus_reg(dev), mask);
+}
+
+#endif /* __TILCDC_REGS_H__ */