[PATCH v2 06/11] drm: sun4i: add color space correction support for DE2 mixer
From: icenowy@aosc.io (Icenowy Zheng)
Date: 2017-06-04 16:04:10
Also in:
dri-devel, linux-clk, linux-devicetree, lkml
Subsystem:
drm driver for allwinner de2 and de3 engine, drm drivers, drm drivers and misc gpu patches, drm drivers for allwinner a10, the rest · Maintainers:
Chen-Yu Tsai, David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Linus Torvalds
The DE2 mixer can do color space correction needed by TV Encoder with its DCSC sub-engine. Add support for it. Signed-off-by: Icenowy Zheng <icenowy@aosc.io> --- drivers/gpu/drm/sun4i/sun8i_mixer.c | 35 +++++++++++++++++++++++++++++++++++ drivers/gpu/drm/sun4i/sun8i_mixer.h | 6 +++++- 2 files changed, 40 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
index d658a3a8159a..65f86641eca3 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c@@ -29,6 +29,14 @@ #include "sun8i_layer.h" #include "sunxi_engine.h" +static const u32 sun8i_rgb2yuv_coef[12] = { + 0x00000107, 0x00000204, 0x00000064, 0x00004200, + 0x00001f68, 0x00001ed6, 0x000001c2, 0x00020200, + 0x000001c2, 0x00001e87, 0x00001fb7, 0x00020200, +}; + +static const u32 sun8i_rgb2yuv_dcsc_alpha = 0x00020200; + static void sun8i_mixer_commit(struct sunxi_engine *engine) { DRM_DEBUG_DRIVER("Committing changes\n");
@@ -37,6 +45,31 @@ static void sun8i_mixer_commit(struct sunxi_engine *engine) SUN8I_MIXER_GLOBAL_DBUFF_ENABLE); } +static void sun8i_mixer_apply_color_correction(struct sunxi_engine *engine) +{ + int i; + + DRM_DEBUG_DRIVER("Applying RGB to YUV color correction\n"); + + /* Set color correction */ + regmap_write(engine->regs, SUN8I_MIXER_DCSC_EN, 1); + + for (i = 0; i < 12; i++) + regmap_write(engine->regs, SUN8I_MIXER_DCSC_COEF_REG(i), + sun8i_rgb2yuv_coef[i]); + + regmap_write(engine->regs, SUN8I_MIXER_DCSC_COEF_ALPHA, + sun8i_rgb2yuv_dcsc_alpha); +} + +static void sun8i_mixer_disable_color_correction(struct sunxi_engine *engine) +{ + DRM_DEBUG_DRIVER("Disabling color correction\n"); + + /* Disable color correction */ + regmap_write(engine->regs, SUN8I_MIXER_DCSC_EN, 0); +} + void sun8i_mixer_layer_enable(struct sun8i_mixer *mixer, int layer, bool enable) {
@@ -229,6 +262,8 @@ int sun8i_mixer_update_layer_buffer(struct sun8i_mixer *mixer, static const struct sunxi_engine_ops sun8i_engine_ops = { .commit = sun8i_mixer_commit, .layers_init = sun8i_layers_init, + .apply_color_correction = sun8i_mixer_apply_color_correction, + .disable_color_correction = sun8i_mixer_disable_color_correction, }; static struct regmap_config sun8i_mixer_regmap_config = {
diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.h b/drivers/gpu/drm/sun4i/sun8i_mixer.h
index 4785ac090b8c..d7f7513898b6 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.h
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.h@@ -88,6 +88,11 @@ #define SUN8I_MIXER_CHAN_UI_LAYER_ATTR_FBFMT_RGB888 (8 << 8) #define SUN8I_MIXER_CHAN_UI_LAYER_ATTR_ALPHA_DEF (0xff << 24) +/* The DCSC sub-engine is used to do color space conversation */ +#define SUN8I_MIXER_DCSC_EN 0xb0000 +#define SUN8I_MIXER_DCSC_COEF_REG(x) (0xb0010 + 0x4 * x) +#define SUN8I_MIXER_DCSC_COEF_ALPHA 0xb0040 + /* * These sub-engines are still unknown now, the EN registers are here only to * be used to disable these sub-engines.
@@ -102,7 +107,6 @@ #define SUN8I_MIXER_PEAK_EN 0xa6000 #define SUN8I_MIXER_ASE_EN 0xa8000 #define SUN8I_MIXER_FCC_EN 0xaa000 -#define SUN8I_MIXER_DCSC_EN 0xb0000 struct sun8i_mixer_cfg { int vi_num;
--
2.12.2