1 files changed, 139 insertions, 62 deletions

diff --git a/drivers/gpu/drm/mxsfb/lcdif_kms.c b/drivers/gpu/drm/mxsfb/lcdif_kms.c
index 262bc43b1079..2541d2de4e45 100644
--- a/drivers/gpu/drm/mxsfb/lcdif_kms.c
+++ b/drivers/gpu/drm/mxsfb/lcdif_kms.c
@@ -17,6 +17,7 @@
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_bridge.h>
 #include <drm/drm_color_mgmt.h>
+#include <drm/drm_connector.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_encoder.h>
 #include <drm/drm_fb_dma_helper.h>
@@ -30,6 +31,18 @@
 #include "lcdif_drv.h"
 #include "lcdif_regs.h"
 
+struct lcdif_crtc_state {
+	struct drm_crtc_state	base;	/* always be the first member */
+	u32			bus_format;
+	u32			bus_flags;
+};
+
+static inline struct lcdif_crtc_state *
+to_lcdif_crtc_state(struct drm_crtc_state *s)
+{
+	return container_of(s, struct lcdif_crtc_state, base);
+}
+
 /* -----------------------------------------------------------------------------
  * CRTC
  */
@@ -385,48 +398,108 @@ static void lcdif_reset_block(struct lcdif_drm_private *lcdif)
 	readl(lcdif->base + LCDC_V8_CTRL);
 }
 
-static void lcdif_crtc_mode_set_nofb(struct lcdif_drm_private *lcdif,
-				     struct drm_plane_state *plane_state,
-				     struct drm_bridge_state *bridge_state,
-				     const u32 bus_format)
+static void lcdif_crtc_mode_set_nofb(struct drm_crtc_state *crtc_state,
+				     struct drm_plane_state *plane_state)
 {
-	struct drm_device *drm = lcdif->crtc.dev;
-	struct drm_display_mode *m = &lcdif->crtc.state->adjusted_mode;
-	u32 bus_flags = 0;
-
-	if (lcdif->bridge && lcdif->bridge->timings)
-		bus_flags = lcdif->bridge->timings->input_bus_flags;
-	else if (bridge_state)
-		bus_flags = bridge_state->input_bus_cfg.flags;
+	struct lcdif_crtc_state *lcdif_crtc_state = to_lcdif_crtc_state(crtc_state);
+	struct drm_device *drm = crtc_state->crtc->dev;
+	struct lcdif_drm_private *lcdif = to_lcdif_drm_private(drm);
+	struct drm_display_mode *m = &crtc_state->adjusted_mode;
 
 	DRM_DEV_DEBUG_DRIVER(drm->dev, "Pixel clock: %dkHz (actual: %dkHz)\n",
 			     m->crtc_clock,
 			     (int)(clk_get_rate(lcdif->clk) / 1000));
 	DRM_DEV_DEBUG_DRIVER(drm->dev, "Bridge bus_flags: 0x%08X\n",
-			     bus_flags);
+			     lcdif_crtc_state->bus_flags);
 	DRM_DEV_DEBUG_DRIVER(drm->dev, "Mode flags: 0x%08X\n", m->flags);
 
 	/* Mandatory eLCDIF reset as per the Reference Manual */
 	lcdif_reset_block(lcdif);
 
-	lcdif_set_formats(lcdif, plane_state, bus_format);
+	lcdif_set_formats(lcdif, plane_state, lcdif_crtc_state->bus_format);
 
-	lcdif_set_mode(lcdif, bus_flags);
+	lcdif_set_mode(lcdif, lcdif_crtc_state->bus_flags);
 }
 
 static int lcdif_crtc_atomic_check(struct drm_crtc *crtc,
 				   struct drm_atomic_state *state)
 {
+	struct drm_device *drm = crtc->dev;
 	struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
 									  crtc);
+	struct lcdif_crtc_state *lcdif_crtc_state = to_lcdif_crtc_state(crtc_state);
 	bool has_primary = crtc_state->plane_mask &
 			   drm_plane_mask(crtc->primary);
+	struct drm_connector_state *connector_state;
+	struct drm_connector *connector;
+	struct drm_encoder *encoder;
+	struct drm_bridge_state *bridge_state;
+	struct drm_bridge *bridge;
+	u32 bus_format, bus_flags;
+	bool format_set = false, flags_set = false;
+	int ret, i;
 
 	/* The primary plane has to be enabled when the CRTC is active. */
 	if (crtc_state->active && !has_primary)
 		return -EINVAL;
 
-	return drm_atomic_add_affected_planes(state, crtc);
+	ret = drm_atomic_add_affected_planes(state, crtc);
+	if (ret)
+		return ret;
+
+	/* Try to find consistent bus format and flags across first bridges. */
+	for_each_new_connector_in_state(state, connector, connector_state, i) {
+		if (!connector_state->crtc)
+			continue;
+
+		encoder = connector_state->best_encoder;
+
+		bridge = drm_bridge_chain_get_first_bridge(encoder);
+		if (!bridge)
+			continue;
+
+		bridge_state = drm_atomic_get_new_bridge_state(state, bridge);
+		if (!bridge_state)
+			bus_format = MEDIA_BUS_FMT_FIXED;
+		else
+			bus_format = bridge_state->input_bus_cfg.format;
+
+		if (bus_format == MEDIA_BUS_FMT_FIXED) {
+			dev_warn(drm->dev,
+				 "[ENCODER:%d:%s]'s bridge does not provide bus format, assuming MEDIA_BUS_FMT_RGB888_1X24.\n"
+				 "Please fix bridge driver by handling atomic_get_input_bus_fmts.\n",
+				 encoder->base.id, encoder->name);
+			bus_format = MEDIA_BUS_FMT_RGB888_1X24;
+		} else if (!bus_format) {
+			/* If all else fails, default to RGB888_1X24 */
+			bus_format = MEDIA_BUS_FMT_RGB888_1X24;
+		}
+
+		if (!format_set) {
+			lcdif_crtc_state->bus_format = bus_format;
+			format_set = true;
+		} else if (lcdif_crtc_state->bus_format != bus_format) {
+			DRM_DEV_DEBUG_DRIVER(drm->dev, "inconsistent bus format\n");
+			return -EINVAL;
+		}
+
+		if (bridge->timings)
+			bus_flags = bridge->timings->input_bus_flags;
+		else if (bridge_state)
+			bus_flags = bridge_state->input_bus_cfg.flags;
+		else
+			bus_flags = 0;
+
+		if (!flags_set) {
+			lcdif_crtc_state->bus_flags = bus_flags;
+			flags_set = true;
+		} else if (lcdif_crtc_state->bus_flags != bus_flags) {
+			DRM_DEV_DEBUG_DRIVER(drm->dev, "inconsistent bus flags\n");
+			return -EINVAL;
+		}
+	}
+
+	return 0;
 }
 
 static void lcdif_crtc_atomic_flush(struct drm_crtc *crtc,
@@ -458,41 +531,18 @@ static void lcdif_crtc_atomic_enable(struct drm_crtc *crtc,
 				     struct drm_atomic_state *state)
 {
 	struct lcdif_drm_private *lcdif = to_lcdif_drm_private(crtc->dev);
+	struct drm_crtc_state *new_cstate = drm_atomic_get_new_crtc_state(state, crtc);
 	struct drm_plane_state *new_pstate = drm_atomic_get_new_plane_state(state,
 									    crtc->primary);
 	struct drm_display_mode *m = &lcdif->crtc.state->adjusted_mode;
-	struct drm_bridge_state *bridge_state = NULL;
 	struct drm_device *drm = lcdif->drm;
-	u32 bus_format = 0;
 	dma_addr_t paddr;
 
-	/* If there is a bridge attached to the LCDIF, use its bus format */
-	if (lcdif->bridge) {
-		bridge_state =
-			drm_atomic_get_new_bridge_state(state,
-							lcdif->bridge);
-		if (!bridge_state)
-			bus_format = MEDIA_BUS_FMT_FIXED;
-		else
-			bus_format = bridge_state->input_bus_cfg.format;
-
-		if (bus_format == MEDIA_BUS_FMT_FIXED) {
-			dev_warn_once(drm->dev,
-				      "Bridge does not provide bus format, assuming MEDIA_BUS_FMT_RGB888_1X24.\n"
-				      "Please fix bridge driver by handling atomic_get_input_bus_fmts.\n");
-			bus_format = MEDIA_BUS_FMT_RGB888_1X24;
-		}
-	}
-
-	/* If all else fails, default to RGB888_1X24 */
-	if (!bus_format)
-		bus_format = MEDIA_BUS_FMT_RGB888_1X24;
-
 	clk_set_rate(lcdif->clk, m->crtc_clock * 1000);
 
 	pm_runtime_get_sync(drm->dev);
 
-	lcdif_crtc_mode_set_nofb(lcdif, new_pstate, bridge_state, bus_format);
+	lcdif_crtc_mode_set_nofb(new_cstate, new_pstate);
 
 	/* Write cur_buf as well to avoid an initial corrupt frame */
 	paddr = drm_fb_dma_get_gem_addr(new_pstate->fb, new_pstate, 0);
@@ -529,6 +579,48 @@ static void lcdif_crtc_atomic_disable(struct drm_crtc *crtc,
 	pm_runtime_put_sync(drm->dev);
 }
 
+static void lcdif_crtc_atomic_destroy_state(struct drm_crtc *crtc,
+					    struct drm_crtc_state *state)
+{
+	__drm_atomic_helper_crtc_destroy_state(state);
+	kfree(to_lcdif_crtc_state(state));
+}
+
+static void lcdif_crtc_reset(struct drm_crtc *crtc)
+{
+	struct lcdif_crtc_state *state;
+
+	if (crtc->state)
+		lcdif_crtc_atomic_destroy_state(crtc, crtc->state);
+
+	crtc->state = NULL;
+
+	state = kzalloc(sizeof(*state), GFP_KERNEL);
+	if (state)
+		__drm_atomic_helper_crtc_reset(crtc, &state->base);
+}
+
+static struct drm_crtc_state *
+lcdif_crtc_atomic_duplicate_state(struct drm_crtc *crtc)
+{
+	struct lcdif_crtc_state *old = to_lcdif_crtc_state(crtc->state);
+	struct lcdif_crtc_state *new;
+
+	if (WARN_ON(!crtc->state))
+		return NULL;
+
+	new = kzalloc(sizeof(*new), GFP_KERNEL);
+	if (!new)
+		return NULL;
+
+	__drm_atomic_helper_crtc_duplicate_state(crtc, &new->base);
+
+	new->bus_format = old->bus_format;
+	new->bus_flags = old->bus_flags;
+
+	return &new->base;
+}
+
 static int lcdif_crtc_enable_vblank(struct drm_crtc *crtc)
 {
 	struct lcdif_drm_private *lcdif = to_lcdif_drm_private(crtc->dev);
@@ -557,25 +649,17 @@ static const struct drm_crtc_helper_funcs lcdif_crtc_helper_funcs = {
 };
 
 static const struct drm_crtc_funcs lcdif_crtc_funcs = {
-	.reset = drm_atomic_helper_crtc_reset,
+	.reset = lcdif_crtc_reset,
 	.destroy = drm_crtc_cleanup,
 	.set_config = drm_atomic_helper_set_config,
 	.page_flip = drm_atomic_helper_page_flip,
-	.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
-	.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
+	.atomic_duplicate_state = lcdif_crtc_atomic_duplicate_state,
+	.atomic_destroy_state = lcdif_crtc_atomic_destroy_state,
 	.enable_vblank = lcdif_crtc_enable_vblank,
 	.disable_vblank = lcdif_crtc_disable_vblank,
 };
 
 /* -----------------------------------------------------------------------------
- * Encoder
- */
-
-static const struct drm_encoder_funcs lcdif_encoder_funcs = {
-	.destroy = drm_encoder_cleanup,
-};
-
-/* -----------------------------------------------------------------------------
  * Planes
  */
 
@@ -667,7 +751,6 @@ int lcdif_kms_init(struct lcdif_drm_private *lcdif)
 					BIT(DRM_COLOR_YCBCR_BT2020);
 	const u32 supported_ranges = BIT(DRM_COLOR_YCBCR_LIMITED_RANGE) |
 				     BIT(DRM_COLOR_YCBCR_FULL_RANGE);
-	struct drm_encoder *encoder = &lcdif->encoder;
 	struct drm_crtc *crtc = &lcdif->crtc;
 	int ret;
 
@@ -691,13 +774,7 @@ int lcdif_kms_init(struct lcdif_drm_private *lcdif)
 		return ret;
 
 	drm_crtc_helper_add(crtc, &lcdif_crtc_helper_funcs);
-	ret = drm_crtc_init_with_planes(lcdif->drm, crtc,
-					&lcdif->planes.primary, NULL,
-					&lcdif_crtc_funcs, NULL);
-	if (ret)
-		return ret;
-
-	encoder->possible_crtcs = drm_crtc_mask(crtc);
-	return drm_encoder_init(lcdif->drm, encoder, &lcdif_encoder_funcs,
-				DRM_MODE_ENCODER_NONE, NULL);
+	return drm_crtc_init_with_planes(lcdif->drm, crtc,
+					 &lcdif->planes.primary, NULL,
+					 &lcdif_crtc_funcs, NULL);
 }