From 286cf26ca3f6628a82c8c37e7059585c8389b82a Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Fri, 24 Jan 2020 14:25:41 +0000
Subject: [PATCH] drm/vc4: Add support for DRM_FORMAT_P030 to vc4
 planes

This currently doesn't handle non-zero source rectangles correctly,
but add support for DRM_FORMAT_P030 with DRM_FORMAT_MOD_BROADCOM_SAND128
modifier to planes when running on HVS5.

WIP still for source cropping SAND/P030 formats

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
 drivers/gpu/drm/vc4/vc4_plane.c | 79 ++++++++++++++++++++++++---------
 1 file changed, 57 insertions(+), 22 deletions(-)

--- a/drivers/gpu/drm/vc4/vc4_plane.c
+++ b/drivers/gpu/drm/vc4/vc4_plane.c
@@ -33,6 +33,7 @@ static const struct hvs_format {
 	u32 hvs; /* HVS_FORMAT_* */
 	u32 pixel_order;
 	u32 pixel_order_hvs5;
+	bool hvs5_only;
 } hvs_formats[] = {
 	{
 		.drm = DRM_FORMAT_XRGB8888,
@@ -128,6 +129,12 @@ static const struct hvs_format {
 		.hvs = HVS_PIXEL_FORMAT_YCBCR_YUV422_2PLANE,
 		.pixel_order = HVS_PIXEL_ORDER_XYCRCB,
 	},
+	{
+		.drm = DRM_FORMAT_P030,
+		.hvs = HVS_PIXEL_FORMAT_YCBCR_10BIT,
+		.pixel_order = HVS_PIXEL_ORDER_XYCBCR,
+		.hvs5_only = true,
+	},
 };
 
 static const struct hvs_format *vc4_get_hvs_format(u32 drm_format)
@@ -765,27 +772,33 @@ static int vc4_plane_mode_set(struct drm
 		uint32_t param = fourcc_mod_broadcom_param(fb->modifier);
 		u32 tile_w, tile, x_off, pix_per_tile;
 
-		hvs_format = HVS_PIXEL_FORMAT_H264;
-
-		switch (base_format_mod) {
-		case DRM_FORMAT_MOD_BROADCOM_SAND64:
-			tiling = SCALER_CTL0_TILING_64B;
-			tile_w = 64;
-			break;
-		case DRM_FORMAT_MOD_BROADCOM_SAND128:
+		if (fb->format->format == DRM_FORMAT_P030) {
+			hvs_format = HVS_PIXEL_FORMAT_YCBCR_10BIT;
 			tiling = SCALER_CTL0_TILING_128B;
-			tile_w = 128;
-			break;
-		case DRM_FORMAT_MOD_BROADCOM_SAND256:
-			tiling = SCALER_CTL0_TILING_256B_OR_T;
-			tile_w = 256;
-			break;
-		default:
-			break;
-		}
+			tile_w = 96;
+		} else {
+			hvs_format = HVS_PIXEL_FORMAT_H264;
 
+			switch (base_format_mod) {
+			case DRM_FORMAT_MOD_BROADCOM_SAND64:
+				tiling = SCALER_CTL0_TILING_64B;
+				tile_w = 64;
+				break;
+			case DRM_FORMAT_MOD_BROADCOM_SAND128:
+				tiling = SCALER_CTL0_TILING_128B;
+				tile_w = 128;
+				break;
+			case DRM_FORMAT_MOD_BROADCOM_SAND256:
+				tiling = SCALER_CTL0_TILING_256B_OR_T;
+				tile_w = 256;
+				break;
+			default:
+				break;
+			}
+		}
 		if (param > SCALER_TILE_HEIGHT_MASK) {
-			DRM_DEBUG_KMS("SAND height too large (%d)\n", param);
+			DRM_DEBUG_KMS("SAND height too large (%d)\n",
+				      param);
 			return -EINVAL;
 		}
 
@@ -795,6 +808,13 @@ static int vc4_plane_mode_set(struct drm
 
 		/* Adjust the base pointer to the first pixel to be scanned
 		 * out.
+		 *
+		 * For P030, y_ptr [31:4] is the 128bit word for the start pixel
+		 * y_ptr [3:0] is the pixel (0-11) contained within that 128bit
+		 * word that should be taken as the first pixel.
+		 * Ditto uv_ptr [31:4] vs [3:0], however [3:0] contains the
+		 * element within the 128bit word, eg for pixel 3 the value
+		 * should be 6.
 		 */
 		for (i = 0; i < num_planes; i++) {
 			vc4_state->offsets[i] += param * tile_w * tile;
@@ -956,7 +976,8 @@ static int vc4_plane_mode_set(struct drm
 
 	/* Pitch word 1/2 */
 	for (i = 1; i < num_planes; i++) {
-		if (hvs_format != HVS_PIXEL_FORMAT_H264) {
+		if (hvs_format != HVS_PIXEL_FORMAT_H264 &&
+		    hvs_format != HVS_PIXEL_FORMAT_YCBCR_10BIT) {
 			vc4_dlist_write(vc4_state,
 					VC4_SET_FIELD(fb->pitches[i],
 						      SCALER_SRC_PITCH));
@@ -1316,6 +1337,13 @@ static bool vc4_format_mod_supported(str
 		default:
 			return false;
 		}
+	case DRM_FORMAT_P030:
+		switch (fourcc_mod_broadcom_mod(modifier)) {
+		case DRM_FORMAT_MOD_BROADCOM_SAND128:
+			return true;
+		default:
+			return false;
+		}
 	case DRM_FORMAT_RGBX1010102:
 	case DRM_FORMAT_BGRX1010102:
 	case DRM_FORMAT_RGBA1010102:
@@ -1348,8 +1376,11 @@ struct drm_plane *vc4_plane_init(struct
 	struct drm_plane *plane = NULL;
 	struct vc4_plane *vc4_plane;
 	u32 formats[ARRAY_SIZE(hvs_formats)];
+	int num_formats = 0;
 	int ret = 0;
 	unsigned i;
+	bool hvs5 = of_device_is_compatible(dev->dev->of_node,
+					    "brcm,bcm2711-vc5");
 	static const uint64_t modifiers[] = {
 		DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED,
 		DRM_FORMAT_MOD_BROADCOM_SAND128,
@@ -1364,13 +1395,17 @@ struct drm_plane *vc4_plane_init(struct
 	if (!vc4_plane)
 		return ERR_PTR(-ENOMEM);
 
-	for (i = 0; i < ARRAY_SIZE(hvs_formats); i++)
-		formats[i] = hvs_formats[i].drm;
+	for (i = 0; i < ARRAY_SIZE(hvs_formats); i++) {
+		if (!hvs_formats[i].hvs5_only || hvs5) {
+			formats[num_formats] = hvs_formats[i].drm;
+			num_formats++;
+		}
+	}
 
 	plane = &vc4_plane->base;
 	ret = drm_universal_plane_init(dev, plane, 0,
 				       &vc4_plane_funcs,
-				       formats, ARRAY_SIZE(formats),
+				       formats, num_formats,
 				       modifiers, type, NULL);
 	if (ret)
 		return ERR_PTR(ret);
