In order to correct brightness values, we have
to support gamma funciton on MT8173. In MT8173,
we have two engines for supporting gamma function:
AAL and GAMMA. This patch add some GAMMA engine
basic function, include config, start and stop
function.
Signed-off-by: Bibby Hsieh <bibby.hsieh at mediatek.com>
---
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 29 ++++++++++++++++++++++++++-
1 file changed, 28 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index 5fc9671..ba895c8 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -41,6 +41,9 @@
#define DISP_AAL_EN 0x0000
#define DISP_AAL_SIZE 0x0030
+#define DISP_GAMMA_EN 0x0000
+#define DISP_GAMMA_SIZE 0x0030
+
#define OD_RELAY_MODE BIT(0)
#define UFO_BYPASS BIT(2)
@@ -50,6 +53,8 @@
#define AAL_EN BIT(0)
+#define GAMMA_EN BIT(0)
+
static void mtk_color_config(struct mtk_ddp_comp *comp, unsigned int w,
unsigned int h, unsigned int vrefresh)
{
@@ -97,12 +102,34 @@ static void mtk_aal_stop(struct mtk_ddp_comp *comp)
writel_relaxed(0x0, comp->regs + DISP_AAL_EN);
}
+static void mtk_gamma_config(struct mtk_ddp_comp *comp, unsigned int w,
+ unsigned int h, unsigned int vrefresh)
+{
+ writel(h << 16 | w, comp->regs + DISP_GAMMA_SIZE);
+}
+
+static void mtk_gamma_start(struct mtk_ddp_comp *comp)
+{
+ writel(GAMMA_EN, comp->regs + DISP_GAMMA_EN);
+}
+
+static void mtk_gamma_stop(struct mtk_ddp_comp *comp)
+{
+ writel_relaxed(0x0, comp->regs + DISP_GAMMA_EN);
+}
+
static const struct mtk_ddp_comp_funcs ddp_aal = {
.config = mtk_aal_config,
.start = mtk_aal_start,
.stop = mtk_aal_stop,
};
+static const struct mtk_ddp_comp_funcs ddp_gamma = {
+ .config = mtk_gamma_config,
+ .start = mtk_gamma_start,
+ .stop = mtk_gamma_stop,
+};
+
static const struct mtk_ddp_comp_funcs ddp_color = {
.config = mtk_color_config,
.start = mtk_color_start,
@@ -145,7 +172,7 @@ static const struct mtk_ddp_comp_match
mtk_ddp_matches[DDP_COMPONENT_ID_MAX] = {
[DDP_COMPONENT_DPI0] = { MTK_DPI, 0, NULL },
[DDP_COMPONENT_DSI0] = { MTK_DSI, 0, NULL },
[DDP_COMPONENT_DSI1] = { MTK_DSI, 1, NULL },
- [DDP_COMPONENT_GAMMA] = { MTK_DISP_GAMMA, 0, NULL },
+ [DDP_COMPONENT_GAMMA] = { MTK_DISP_GAMMA, 0, &ddp_gamma },
[DDP_COMPONENT_OD] = { MTK_DISP_OD, 0, &ddp_od },
[DDP_COMPONENT_OVL0] = { MTK_DISP_OVL, 0, NULL },
[DDP_COMPONENT_OVL1] = { MTK_DISP_OVL, 1, NULL },
--
1.7.9.5
