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From: Anatoliy Klymenko <anatoliy.klymenko@amd.com>
Date: Tue, 12 Mar 2024 17:55:02 -0700
Subject: [PATCH v2 5/8] drm: xlnx: zynqmp_dpsub: Set input live format
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Program live video input format according to selected media bus format.

In the bridge mode of operation, DPSUB is connected to FPGA CRTC which
almost certainly supports a single media bus format as its output. Expect
this to be delivered via the new bridge atomic state. Program DPSUB
registers accordingly.
Update zynqmp_disp_layer_set_format() API to fit both live and non-live
layer types.

Signed-off-by: Anatoliy Klymenko <anatoliy.klymenko@amd.com>
---
 drivers/gpu/drm/xlnx/zynqmp_disp.c | 93 +++++++++++++++++++++++++++++++-------
 drivers/gpu/drm/xlnx/zynqmp_disp.h |  2 +-
 drivers/gpu/drm/xlnx/zynqmp_dp.c   | 13 ++++--
 drivers/gpu/drm/xlnx/zynqmp_kms.c  |  2 +-
 4 files changed, 87 insertions(+), 23 deletions(-)

diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp.c b/drivers/gpu/drm/xlnx/zynqmp_disp.c
index dd48fa60fa9a..0cacd597f4b8 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_disp.c
+++ b/drivers/gpu/drm/xlnx/zynqmp_disp.c
@@ -383,7 +383,7 @@ static const struct zynqmp_disp_format avbuf_live_fmts[] = {
 				  ZYNQMP_DISP_AV_BUF_LIVE_CONFIG_FMT_RGB,
 		.sf		= scaling_factors_666,
 	}, {
-		.bus_fmt	= MEDIA_BUS_FMT_UYVY8_1X24,
+		.bus_fmt	= MEDIA_BUS_FMT_RBG888_1X24,
 		.buf_fmt	= ZYNQMP_DISP_AV_BUF_LIVE_CONFIG_BPC_8 |
 				  ZYNQMP_DISP_AV_BUF_LIVE_CONFIG_FMT_RGB,
 		.sf		= scaling_factors_888,
@@ -433,19 +433,28 @@ static void zynqmp_disp_avbuf_set_format(struct zynqmp_disp *disp,
 					 const struct zynqmp_disp_format *fmt)
 {
 	unsigned int i;
-	u32 val;
+	u32 val, reg;
 
-	val = zynqmp_disp_avbuf_read(disp, ZYNQMP_DISP_AV_BUF_FMT);
-	val &= zynqmp_disp_layer_is_video(layer)
-	    ? ~ZYNQMP_DISP_AV_BUF_FMT_NL_VID_MASK
-	    : ~ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_MASK;
-	val |= fmt->buf_fmt;
-	zynqmp_disp_avbuf_write(disp, ZYNQMP_DISP_AV_BUF_FMT, val);
+	layer->disp_fmt = fmt;
+	if (layer->mode == ZYNQMP_DPSUB_LAYER_NONLIVE) {
+		reg = ZYNQMP_DISP_AV_BUF_FMT;
+		val = zynqmp_disp_avbuf_read(disp, ZYNQMP_DISP_AV_BUF_FMT);
+		val &= zynqmp_disp_layer_is_video(layer)
+		    ? ~ZYNQMP_DISP_AV_BUF_FMT_NL_VID_MASK
+		    : ~ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_MASK;
+		val |= fmt->buf_fmt;
+	} else {
+		reg = zynqmp_disp_layer_is_video(layer)
+		    ? ZYNQMP_DISP_AV_BUF_LIVE_VID_CONFIG
+		    : ZYNQMP_DISP_AV_BUF_LIVE_GFX_CONFIG;
+		val = fmt->buf_fmt;
+	}
+	zynqmp_disp_avbuf_write(disp, reg, val);
 
 	for (i = 0; i < ZYNQMP_DISP_AV_BUF_NUM_SF; i++) {
-		unsigned int reg = zynqmp_disp_layer_is_video(layer)
-				 ? ZYNQMP_DISP_AV_BUF_VID_COMP_SF(i)
-				 : ZYNQMP_DISP_AV_BUF_GFX_COMP_SF(i);
+		reg = zynqmp_disp_layer_is_video(layer)
+		    ? ZYNQMP_DISP_AV_BUF_VID_COMP_SF(i)
+		    : ZYNQMP_DISP_AV_BUF_GFX_COMP_SF(i);
 
 		zynqmp_disp_avbuf_write(disp, reg, fmt->sf[i]);
 	}
@@ -984,23 +993,73 @@ void zynqmp_disp_layer_disable(struct zynqmp_disp_layer *layer)
 	zynqmp_disp_blend_layer_disable(layer->disp, layer);
 }
 
+struct zynqmp_disp_bus_to_drm {
+	u32 bus_fmt;
+	u32 drm_fmt;
+};
+
+/**
+ * zynqmp_disp_reference_drm_format - Get reference DRM format corresponding
+ * to the given media bus format.
+ * @bus_format: Media bus format
+ *
+ * Map media bus format to some DRM format that represents the same color space
+ * and chroma subsampling as the @bus_format video signal. These DRM format
+ * properties are required to program the blender.
+ *
+ * Return: DRM format code corresponding to @bus_format
+ */
+static u32 zynqmp_disp_reference_drm_format(u32 bus_format)
+{
+	static const struct zynqmp_disp_bus_to_drm format_map[] = {
+		{
+			.bus_fmt = MEDIA_BUS_FMT_RGB666_1X18,
+			.drm_fmt = DRM_FORMAT_RGB565,
+		}, {
+			.bus_fmt = MEDIA_BUS_FMT_RBG888_1X24,
+			.drm_fmt = DRM_FORMAT_RGB888,
+		}, {
+			.bus_fmt = MEDIA_BUS_FMT_UYVY8_1X16,
+			.drm_fmt = DRM_FORMAT_YUV422,
+		}, {
+			.bus_fmt = MEDIA_BUS_FMT_VUY8_1X24,
+			.drm_fmt = DRM_FORMAT_YUV444,
+		}, {
+			.bus_fmt = MEDIA_BUS_FMT_UYVY10_1X20,
+			.drm_fmt = DRM_FORMAT_P210,
+		},
+	};
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(format_map); ++i)
+		if (format_map[i].bus_fmt == bus_format)
+			return format_map[i].drm_fmt;
+
+	return DRM_FORMAT_INVALID;
+}
+
 /**
  * zynqmp_disp_layer_set_format - Set the layer format
  * @layer: The layer
- * @info: The format info
+ * @drm_or_bus_format: DRM or media bus format
  *
  * Set the format for @layer to @info. The layer must be disabled.
  */
 void zynqmp_disp_layer_set_format(struct zynqmp_disp_layer *layer,
-				  const struct drm_format_info *info)
+				  u32 drm_or_bus_format)
 {
 	unsigned int i;
 
-	layer->disp_fmt = zynqmp_disp_layer_find_format(layer, info->format);
-	layer->drm_fmt = info;
-
+	layer->disp_fmt = zynqmp_disp_layer_find_format(layer, drm_or_bus_format);
 	zynqmp_disp_avbuf_set_format(layer->disp, layer, layer->disp_fmt);
 
+	if (layer->mode == ZYNQMP_DPSUB_LAYER_LIVE)
+		drm_or_bus_format = zynqmp_disp_reference_drm_format(drm_or_bus_format);
+
+	layer->drm_fmt = drm_format_info(drm_or_bus_format);
+	if (!layer->drm_fmt)
+		return;
+
 	if (layer->mode == ZYNQMP_DPSUB_LAYER_LIVE)
 		return;
 
@@ -1008,7 +1067,7 @@ void zynqmp_disp_layer_set_format(struct zynqmp_disp_layer *layer,
 	 * Set pconfig for each DMA channel to indicate they're part of a
 	 * video group.
 	 */
-	for (i = 0; i < info->num_planes; i++) {
+	for (i = 0; i < layer->drm_fmt->num_planes; i++) {
 		struct zynqmp_disp_layer_dma *dma = &layer->dmas[i];
 		struct xilinx_dpdma_peripheral_config pconfig = {
 			.video_group = true,
diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp.h b/drivers/gpu/drm/xlnx/zynqmp_disp.h
index 88c285a12e23..9f9a5f50ffbc 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_disp.h
+++ b/drivers/gpu/drm/xlnx/zynqmp_disp.h
@@ -55,7 +55,7 @@ u32 *zynqmp_disp_layer_formats(struct zynqmp_disp_layer *layer,
 void zynqmp_disp_layer_enable(struct zynqmp_disp_layer *layer);
 void zynqmp_disp_layer_disable(struct zynqmp_disp_layer *layer);
 void zynqmp_disp_layer_set_format(struct zynqmp_disp_layer *layer,
-				  const struct drm_format_info *info);
+				  u32 drm_or_bus_format);
 int zynqmp_disp_layer_update(struct zynqmp_disp_layer *layer,
 			     struct drm_plane_state *state);
 
diff --git a/drivers/gpu/drm/xlnx/zynqmp_dp.c b/drivers/gpu/drm/xlnx/zynqmp_dp.c
index a0d169ac48c0..fc6b1d783c28 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_dp.c
+++ b/drivers/gpu/drm/xlnx/zynqmp_dp.c
@@ -1281,7 +1281,8 @@ static void zynqmp_dp_disp_enable(struct zynqmp_dp *dp,
 {
 	enum zynqmp_dpsub_layer_id layer_id;
 	struct zynqmp_disp_layer *layer;
-	const struct drm_format_info *info;
+	struct drm_bridge_state *bridge_state;
+	u32 bus_fmt;
 
 	if (dp->dpsub->connected_ports & BIT(ZYNQMP_DPSUB_PORT_LIVE_VIDEO))
 		layer_id = ZYNQMP_DPSUB_LAYER_VID;
@@ -1291,10 +1292,14 @@ static void zynqmp_dp_disp_enable(struct zynqmp_dp *dp,
 		return;
 
 	layer = dp->dpsub->layers[layer_id];
+	bridge_state = drm_atomic_get_new_bridge_state(old_bridge_state->base.state,
+						       old_bridge_state->bridge);
+	if (WARN_ON(!bridge_state))
+		return;
+
+	bus_fmt = bridge_state->input_bus_cfg.format;
+	zynqmp_disp_layer_set_format(layer, bus_fmt);
 
-	/* TODO: Make the format configurable. */
-	info = drm_format_info(DRM_FORMAT_YUV422);
-	zynqmp_disp_layer_set_format(layer, info);
 	zynqmp_disp_layer_enable(layer);
 
 	if (layer_id == ZYNQMP_DPSUB_LAYER_GFX)
diff --git a/drivers/gpu/drm/xlnx/zynqmp_kms.c b/drivers/gpu/drm/xlnx/zynqmp_kms.c
index bf9fba01df0e..d96b3f3f2e3a 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_kms.c
+++ b/drivers/gpu/drm/xlnx/zynqmp_kms.c
@@ -111,7 +111,7 @@ static void zynqmp_dpsub_plane_atomic_update(struct drm_plane *plane,
 		if (old_state->fb)
 			zynqmp_disp_layer_disable(layer);
 
-		zynqmp_disp_layer_set_format(layer, new_state->fb->format);
+		zynqmp_disp_layer_set_format(layer, new_state->fb->format->format);
 	}
 
 	zynqmp_disp_layer_update(layer, new_state);

-- 
2.25.1