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From 799c83fb9b72bcd473099e3da1395c92a5a581ff Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.org>
Date: Tue, 17 Sep 2019 18:28:17 +0100
Subject: [PATCH] drm/vc4: Add support for YUV color encodings and
ranges
The BT601/BT709 color encoding and limited vs full
range properties were not being exposed, defaulting
always to BT601 limited range.
Expose the parameters and set the registers appropriately.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
---
drivers/gpu/drm/vc4/vc4_plane.c | 72 +++++++++++++++++++++++++++++++--
drivers/gpu/drm/vc4/vc4_regs.h | 3 ++
2 files changed, 72 insertions(+), 3 deletions(-)
--- a/drivers/gpu/drm/vc4/vc4_plane.c
+++ b/drivers/gpu/drm/vc4/vc4_plane.c
@@ -500,6 +500,53 @@ static void vc4_write_scaling_parameters
}
}
+/* The colorspace conversion matrices are held in 3 entries in the dlist.
+ * Create an array of them, with entries for each full and limited mode, and
+ * each supported colorspace.
+ */
+#define VC4_LIMITED_RANGE 0
+#define VC4_FULL_RANGE 1
+
+static const u32 colorspace_coeffs[2][DRM_COLOR_ENCODING_MAX][3] = {
+ {
+ /* Limited range */
+ {
+ /* BT601 */
+ SCALER_CSC0_ITR_R_601_5,
+ SCALER_CSC1_ITR_R_601_5,
+ SCALER_CSC2_ITR_R_601_5,
+ }, {
+ /* BT709 */
+ SCALER_CSC0_ITR_R_709_3,
+ SCALER_CSC1_ITR_R_709_3,
+ SCALER_CSC2_ITR_R_709_3,
+ }, {
+ /* BT2020. Not supported yet - copy 601 */
+ SCALER_CSC0_ITR_R_601_5,
+ SCALER_CSC1_ITR_R_601_5,
+ SCALER_CSC2_ITR_R_601_5,
+ }
+ }, {
+ /* Full range */
+ {
+ /* JFIF */
+ SCALER_CSC0_JPEG_JFIF,
+ SCALER_CSC1_JPEG_JFIF,
+ SCALER_CSC2_JPEG_JFIF,
+ }, {
+ /* BT709 */
+ SCALER_CSC0_ITR_R_709_3_FR,
+ SCALER_CSC1_ITR_R_709_3_FR,
+ SCALER_CSC2_ITR_R_709_3_FR,
+ }, {
+ /* BT2020. Not supported yet - copy JFIF */
+ SCALER_CSC0_JPEG_JFIF,
+ SCALER_CSC1_JPEG_JFIF,
+ SCALER_CSC2_JPEG_JFIF,
+ }
+ }
+};
+
/* Writes out a full display list for an active plane to the plane's
* private dlist state.
*/
@@ -760,9 +807,20 @@ static int vc4_plane_mode_set(struct drm
/* Colorspace conversion words */
if (vc4_state->is_yuv) {
- vc4_dlist_write(vc4_state, SCALER_CSC0_ITR_R_601_5);
- vc4_dlist_write(vc4_state, SCALER_CSC1_ITR_R_601_5);
- vc4_dlist_write(vc4_state, SCALER_CSC2_ITR_R_601_5);
+ enum drm_color_encoding color_encoding = state->color_encoding;
+ enum drm_color_range color_range = state->color_range;
+ const u32 *ccm;
+
+ if (color_encoding >= DRM_COLOR_ENCODING_MAX)
+ color_encoding = DRM_COLOR_YCBCR_BT601;
+ if (color_range >= DRM_COLOR_RANGE_MAX)
+ color_range = DRM_COLOR_YCBCR_LIMITED_RANGE;
+
+ ccm = colorspace_coeffs[color_range][color_encoding];
+
+ vc4_dlist_write(vc4_state, ccm[0]);
+ vc4_dlist_write(vc4_state, ccm[1]);
+ vc4_dlist_write(vc4_state, ccm[2]);
}
if (vc4_state->x_scaling[0] != VC4_SCALING_NONE ||
@@ -1116,5 +1174,13 @@ struct drm_plane *vc4_plane_init(struct
drm_plane_create_alpha_property(plane);
+ drm_plane_create_color_properties(plane,
+ BIT(DRM_COLOR_YCBCR_BT601) |
+ BIT(DRM_COLOR_YCBCR_BT709),
+ BIT(DRM_COLOR_YCBCR_LIMITED_RANGE) |
+ BIT(DRM_COLOR_YCBCR_FULL_RANGE),
+ DRM_COLOR_YCBCR_BT709,
+ DRM_COLOR_YCBCR_LIMITED_RANGE);
+
return plane;
}
--- a/drivers/gpu/drm/vc4/vc4_regs.h
+++ b/drivers/gpu/drm/vc4/vc4_regs.h
@@ -972,6 +972,7 @@ enum hvs_pixel_format {
#define SCALER_CSC0_ITR_R_601_5 0x00f00000
#define SCALER_CSC0_ITR_R_709_3 0x00f00000
#define SCALER_CSC0_JPEG_JFIF 0x00000000
+#define SCALER_CSC0_ITR_R_709_3_FR 0x00000000
/* S2.8 contribution of Cb to Green */
#define SCALER_CSC1_COEF_CB_GRN_MASK VC4_MASK(31, 22)
@@ -988,6 +989,7 @@ enum hvs_pixel_format {
#define SCALER_CSC1_ITR_R_601_5 0xe73304a8
#define SCALER_CSC1_ITR_R_709_3 0xf2b784a8
#define SCALER_CSC1_JPEG_JFIF 0xea34a400
+#define SCALER_CSC1_ITR_R_709_3_FR 0xe23d0400
/* S2.8 contribution of Cb to Red */
#define SCALER_CSC2_COEF_CB_RED_MASK VC4_MASK(29, 20)
@@ -1001,6 +1003,7 @@ enum hvs_pixel_format {
#define SCALER_CSC2_ITR_R_601_5 0x00066204
#define SCALER_CSC2_ITR_R_709_3 0x00072a1c
#define SCALER_CSC2_JPEG_JFIF 0x000599c5
+#define SCALER_CSC2_ITR_R_709_3_FR 0x00064ddb
#define SCALER_TPZ0_VERT_RECALC BIT(31)
#define SCALER_TPZ0_SCALE_MASK VC4_MASK(28, 8)
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