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drm/mediatek: Add GAMMA engine basic function 

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@mediatek.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
Bibby Hsieh 2016-07-28 10:22:53 +08:00 committed by Philipp Zabel
parent 0664d1392c
commit e0a5d33702
1 changed files with 28 additions and 1 deletions
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29
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
View File

@ -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 },