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Subject[PATCH v1] drm/mediatek: add ctm property support
Date
From: Yongqiang Niu <yongqiang.niu@mediatek.com>

add ctm property support

Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
---
drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 7 +++-
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 59 ++++++++++++++++++++++++++++-
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 9 +++++
3 files changed, 72 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 4fb346c..e7e3aa9 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -666,10 +666,13 @@ static void mtk_drm_crtc_atomic_flush(struct drm_crtc *crtc,
int i;

if (crtc->state->color_mgmt_changed)
- for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
+ for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
mtk_ddp_gamma_set(mtk_crtc->ddp_comp[i],
crtc->state,
mtk_crtc_state->cmdq_handle);
+ mtk_ddp_ctm_set(mtk_crtc->ddp_comp[i], crtc->state);
+ }
+
#ifdef CONFIG_MTK_CMDQ
if (mtk_crtc->cmdq_client) {
drm_atomic_state_get(old_atomic_state);
@@ -891,7 +894,7 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
if (ret < 0)
return ret;
drm_mode_crtc_set_gamma_size(&mtk_crtc->base, MTK_LUT_SIZE);
- drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, false, MTK_LUT_SIZE);
+ drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, true, MTK_LUT_SIZE);
priv->num_pipes++;
#ifdef CONFIG_MTK_CMDQ
mtk_crtc->cmdq_client =
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index 9cc12af..4bbbac7 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -38,7 +38,15 @@
#define CCORR_EN BIT(0)
#define DISP_CCORR_CFG 0x0020
#define CCORR_RELAY_MODE BIT(0)
+#define CCORR_ENGINE_EN BIT(1)
+#define CCORR_GAMMA_OFF BIT(2)
+#define CCORR_WGAMUT_SRC_CLIP BIT(3)
#define DISP_CCORR_SIZE 0x0030
+#define DISP_CCORR_COEF_0 0x0080
+#define DISP_CCORR_COEF_1 0x0084
+#define DISP_CCORR_COEF_2 0x0088
+#define DISP_CCORR_COEF_3 0x008C
+#define DISP_CCORR_COEF_4 0x0090

#define DISP_DITHER_EN 0x0000
#define DITHER_EN BIT(0)
@@ -187,7 +195,7 @@ static void mtk_ccorr_config(struct mtk_ddp_comp *comp, unsigned int w,
unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
{
mtk_ddp_write(cmdq_pkt, h << 16 | w, comp, DISP_CCORR_SIZE);
- mtk_ddp_write(cmdq_pkt, CCORR_RELAY_MODE, comp, DISP_CCORR_CFG);
+ mtk_ddp_write(cmdq_pkt, CCORR_ENGINE_EN, comp, DISP_CCORR_CFG);
}

static void mtk_ccorr_start(struct mtk_ddp_comp *comp)
@@ -200,6 +208,54 @@ static void mtk_ccorr_stop(struct mtk_ddp_comp *comp)
writel_relaxed(0x0, comp->regs + DISP_CCORR_EN);
}

+/* Converts a DRM S31.32 value to the HW S0.11 format. */
+static u16 mtk_ctm_s31_32_to_s0_11(u64 in)
+{
+ u16 r;
+
+ /* Sign bit. */
+ r = in & BIT_ULL(63) ? BIT(11) : 0;
+
+ if ((in & GENMASK_ULL(62, 33)) > 0) {
+ /* We have zero integer bits so we can only saturate here. */
+ r |= GENMASK(10, 0);
+ } else {
+ /* Otherwise take the 9 most important fractional bits. */
+ r |= (in >> 22) & GENMASK(10, 0);
+ }
+
+ return r;
+}
+
+static void mtk_ccorr_ctm_set(struct mtk_ddp_comp *comp,
+ struct drm_crtc_state *state)
+{
+ struct drm_property_blob *blob = state->ctm;
+ struct drm_color_ctm *ctm;
+ const u64 *input;
+ uint16_t coeffs[9] = { 0 };
+ int i;
+
+ if (!blob)
+ return;
+
+ ctm = (struct drm_color_ctm *)blob->data;
+ input = ctm->matrix;
+
+ for (i = 0; i < ARRAY_SIZE(coeffs); i++)
+ coeffs[i] = mtk_ctm_s31_32_to_s0_11(input[i]);
+
+ writel_relaxed(coeffs[0] << 16 | coeffs[1],
+ comp->regs + DISP_CCORR_COEF_0);
+ writel_relaxed(coeffs[2] << 16 | coeffs[3],
+ comp->regs + DISP_CCORR_COEF_1);
+ writel_relaxed(coeffs[4] << 16 | coeffs[5],
+ comp->regs + DISP_CCORR_COEF_2);
+ writel_relaxed(coeffs[6] << 16 | coeffs[7],
+ comp->regs + DISP_CCORR_COEF_3);
+ writel_relaxed(coeffs[8] << 16, comp->regs + DISP_CCORR_COEF_4);
+}
+
static void mtk_dither_config(struct mtk_ddp_comp *comp, unsigned int w,
unsigned int h, unsigned int vrefresh,
unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
@@ -269,6 +325,7 @@ static void mtk_gamma_set(struct mtk_ddp_comp *comp,
.config = mtk_ccorr_config,
.start = mtk_ccorr_start,
.stop = mtk_ccorr_stop,
+ .ctm_set = mtk_ccorr_ctm_set,
};

static const struct mtk_ddp_comp_funcs ddp_dither = {
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
index 5b0a3d4..5100c3d 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
@@ -95,6 +95,8 @@ struct mtk_ddp_comp_funcs {
struct cmdq_pkt *cmdq_pkt);
void (*bgclr_in_on)(struct mtk_ddp_comp *comp);
void (*bgclr_in_off)(struct mtk_ddp_comp *comp);
+ void (*ctm_set)(struct mtk_ddp_comp *comp,
+ struct drm_crtc_state *state);
};

struct mtk_ddp_comp {
@@ -213,6 +215,13 @@ static inline void mtk_ddp_comp_bgclr_in_off(struct mtk_ddp_comp *comp)
comp->funcs->bgclr_in_off(comp);
}

+static inline void mtk_ddp_ctm_set(struct mtk_ddp_comp *comp,
+ struct drm_crtc_state *state)
+{
+ if (comp->funcs && comp->funcs->ctm_set)
+ comp->funcs->ctm_set(comp, state);
+}
+
int mtk_ddp_comp_get_id(struct device_node *node,
enum mtk_ddp_comp_type comp_type);
int mtk_ddp_comp_init(struct device *dev, struct device_node *comp_node,
--
1.8.1.1.dirty
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