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Commit e0a5d337 authored by Bibby Hsieh's avatar Bibby Hsieh Committed by Philipp Zabel
Browse files

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: default avatarBibby Hsieh <bibby.hsieh@mediatek.com>
Signed-off-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
parent 0664d139

drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c

+28 −1
Original line number Diff line number Diff line
@@ -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 },