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drm/mediatek: Add AAL engine basic function

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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 AAL 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 10:22:52 +08:00 committed by Philipp Zabel
parent 37b2a2149b
commit 0664d1392c
1 changed files with 28 additions and 1 deletions
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29
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
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@ -38,6 +38,9 @@
#define DISP_COLOR_WIDTH 0x0c50
#define DISP_COLOR_HEIGHT 0x0c54
#define DISP_AAL_EN 0x0000
#define DISP_AAL_SIZE 0x0030
#define OD_RELAY_MODE BIT(0)
#define UFO_BYPASS BIT(2)
@ -45,6 +48,8 @@
#define COLOR_BYPASS_ALL BIT(7)
#define COLOR_SEQ_SEL BIT(13)
#define AAL_EN BIT(0)
static void mtk_color_config(struct mtk_ddp_comp *comp, unsigned int w,
unsigned int h, unsigned int vrefresh)
{
@ -76,6 +81,28 @@ static void mtk_ufoe_start(struct mtk_ddp_comp *comp)
writel(UFO_BYPASS, comp->regs + DISP_REG_UFO_START);
}
static void mtk_aal_config(struct mtk_ddp_comp *comp, unsigned int w,
unsigned int h, unsigned int vrefresh)
{
writel(h << 16 | w, comp->regs + DISP_AAL_SIZE);
}
static void mtk_aal_start(struct mtk_ddp_comp *comp)
{
writel(AAL_EN, comp->regs + DISP_AAL_EN);
}
static void mtk_aal_stop(struct mtk_ddp_comp *comp)
{
writel_relaxed(0x0, comp->regs + DISP_AAL_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_color = {
.config = mtk_color_config,
.start = mtk_color_start,
@ -112,7 +139,7 @@ struct mtk_ddp_comp_match {
};
static const struct mtk_ddp_comp_match mtk_ddp_matches[DDP_COMPONENT_ID_MAX] = {
[DDP_COMPONENT_AAL] = { MTK_DISP_AAL, 0, NULL },
[DDP_COMPONENT_AAL] = { MTK_DISP_AAL, 0, &ddp_aal },
[DDP_COMPONENT_COLOR0] = { MTK_DISP_COLOR, 0, &ddp_color },
[DDP_COMPONENT_COLOR1] = { MTK_DISP_COLOR, 1, &ddp_color },
[DDP_COMPONENT_DPI0] = { MTK_DPI, 0, NULL },