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Subject[PATCH v1 2/2] drm/komeda: Enable color-encoding (YUV format) support
Date
Adds color-encoding properties if layer can support YUV format.
Updates HW YUV-RGB matrix state according to the color-encoding
properties.

Signed-off-by: Lowry Li (Arm Technology China) <lowry.li@arm.com>
---
drivers/gpu/drm/arm/display/komeda/Makefile | 1 +
.../gpu/drm/arm/display/komeda/d71/d71_component.c | 6 ++
.../gpu/drm/arm/display/komeda/komeda_color_mgmt.c | 67 ++++++++++++++++++++++
.../gpu/drm/arm/display/komeda/komeda_color_mgmt.h | 17 ++++++
drivers/gpu/drm/arm/display/komeda/komeda_plane.c | 13 +++++
5 files changed, 104 insertions(+)
create mode 100644 drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.c
create mode 100644 drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.h

diff --git a/drivers/gpu/drm/arm/display/komeda/Makefile b/drivers/gpu/drm/arm/display/komeda/Makefile
index d7e29fc..73b8e8b 100644
--- a/drivers/gpu/drm/arm/display/komeda/Makefile
+++ b/drivers/gpu/drm/arm/display/komeda/Makefile
@@ -8,6 +8,7 @@ komeda-y := \
komeda_drv.o \
komeda_dev.o \
komeda_format_caps.o \
+ komeda_color_mgmt.o \
komeda_pipeline.o \
komeda_pipeline_state.o \
komeda_framebuffer.o \
diff --git a/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c b/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
index dfc70f5..b85514b 100644
--- a/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
+++ b/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
@@ -10,6 +10,7 @@
#include "komeda_kms.h"
#include "malidp_io.h"
#include "komeda_framebuffer.h"
+#include "komeda_color_mgmt.h"

static void get_resources_id(u32 hw_id, u32 *pipe_id, u32 *comp_id)
{
@@ -239,6 +240,11 @@ static void d71_layer_update(struct komeda_component *c,
}

malidp_write32(reg, LAYER_R_CONTROL, upsampling);
+ malidp_write_group(reg, LAYER_YUV_RGB_COEFF0,
+ KOMEDA_N_YUV2RGB_COEFFS,
+ komeda_select_yuv2rgb_coeffs(
+ plane_st->color_encoding,
+ plane_st->color_range));
}

malidp_write32(reg, LAYER_FMT, kfb->format_caps->hw_id);
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.c b/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.c
new file mode 100644
index 0000000..9d14a92
--- /dev/null
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.c
@@ -0,0 +1,67 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) COPYRIGHT 2019 ARM Limited. All rights reserved.
+ * Author: James.Qian.Wang <james.qian.wang@arm.com>
+ *
+ */
+
+#include "komeda_color_mgmt.h"
+
+/* 10bit precision YUV2RGB matrix */
+static const s32 yuv2rgb_bt601_narrow[KOMEDA_N_YUV2RGB_COEFFS] = {
+ 1192, 0, 1634,
+ 1192, -401, -832,
+ 1192, 2066, 0,
+ 64, 512, 512
+};
+
+static const s32 yuv2rgb_bt601_wide[KOMEDA_N_YUV2RGB_COEFFS] = {
+ 1024, 0, 1436,
+ 1024, -352, -731,
+ 1024, 1815, 0,
+ 0, 512, 512
+};
+
+static const s32 yuv2rgb_bt709_narrow[KOMEDA_N_YUV2RGB_COEFFS] = {
+ 1192, 0, 1836,
+ 1192, -218, -546,
+ 1192, 2163, 0,
+ 64, 512, 512
+};
+
+static const s32 yuv2rgb_bt709_wide[KOMEDA_N_YUV2RGB_COEFFS] = {
+ 1024, 0, 1613,
+ 1024, -192, -479,
+ 1024, 1900, 0,
+ 0, 512, 512
+};
+
+static const s32 yuv2rgb_bt2020[KOMEDA_N_YUV2RGB_COEFFS] = {
+ 1024, 0, 1476,
+ 1024, -165, -572,
+ 1024, 1884, 0,
+ 0, 512, 512
+};
+
+const s32 *komeda_select_yuv2rgb_coeffs(u32 color_encoding, u32 color_range)
+{
+ bool narrow = color_range == DRM_COLOR_YCBCR_LIMITED_RANGE;
+ const s32 *coeffs;
+
+ switch (color_encoding) {
+ case DRM_COLOR_YCBCR_BT709:
+ coeffs = narrow ? yuv2rgb_bt709_narrow : yuv2rgb_bt709_wide;
+ break;
+ case DRM_COLOR_YCBCR_BT601:
+ coeffs = narrow ? yuv2rgb_bt601_narrow : yuv2rgb_bt601_wide;
+ break;
+ case DRM_COLOR_YCBCR_BT2020:
+ coeffs = yuv2rgb_bt2020;
+ break;
+ default:
+ coeffs = NULL;
+ break;
+ }
+
+ return coeffs;
+}
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.h b/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.h
new file mode 100644
index 0000000..a2df218
--- /dev/null
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * (C) COPYRIGHT 2019 ARM Limited. All rights reserved.
+ * Author: James.Qian.Wang <james.qian.wang@arm.com>
+ *
+ */
+
+#ifndef _KOMEDA_COLOR_MGMT_H_
+#define _KOMEDA_COLOR_MGMT_H_
+
+#include <drm/drm_color_mgmt.h>
+
+#define KOMEDA_N_YUV2RGB_COEFFS 12
+
+const s32 *komeda_select_yuv2rgb_coeffs(u32 color_encoding, u32 color_range);
+
+#endif
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
index f344048..bcf30a7 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
@@ -135,6 +135,8 @@ static void komeda_plane_reset(struct drm_plane *plane)
state->base.pixel_blend_mode = DRM_MODE_BLEND_PREMULTI;
state->base.alpha = DRM_BLEND_ALPHA_OPAQUE;
state->base.zpos = kplane->layer->base.id;
+ state->base.color_encoding = DRM_COLOR_YCBCR_BT601;
+ state->base.color_range = DRM_COLOR_YCBCR_LIMITED_RANGE;
plane->state = &state->base;
plane->state->plane = plane;
}
@@ -330,6 +332,17 @@ static int komeda_plane_add(struct komeda_kms_dev *kms,
if (err)
goto cleanup;

+ err = drm_plane_create_color_properties(plane,
+ BIT(DRM_COLOR_YCBCR_BT601) |
+ BIT(DRM_COLOR_YCBCR_BT709) |
+ BIT(DRM_COLOR_YCBCR_BT2020),
+ BIT(DRM_COLOR_YCBCR_LIMITED_RANGE) |
+ BIT(DRM_COLOR_YCBCR_FULL_RANGE),
+ DRM_COLOR_YCBCR_BT601,
+ DRM_COLOR_YCBCR_LIMITED_RANGE);
+ if (err)
+ goto cleanup;
+
return 0;
cleanup:
komeda_plane_destroy(plane);
--
1.9.1
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