Re: [PATCH v4 4/8] drm/mediatek: add support for Mediatek SoC MT2701

From: YT Shen
Date: Tue Jul 19 2016 - 07:09:51 EST

Hi CK,

On Mon, 2016-07-18 at 14:58 +0800, CK Hu wrote:
> Hi, YT:
>
> One comment inline.
>
> On Fri, 2016-07-15 at 18:07 +0800, YT Shen wrote:
> > This patch add support for the Mediatek MT2701 DISP subsystem.
> > There is only one OVL engine in MT2701.
> >
> > Signed-off-by: YT Shen <yt.shen@xxxxxxxxxxxx>
> > ---
> > drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 6 ++++
> > drivers/gpu/drm/mediatek/mtk_disp_rdma.c | 6 ++++
> > drivers/gpu/drm/mediatek/mtk_drm_ddp.c | 41 +++++++++++++++++++++++++++
> > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 7 +++++
> > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
> > drivers/gpu/drm/mediatek/mtk_drm_drv.c | 31 ++++++++++++++++++++
> > 6 files changed, 92 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> > index eb5c05e..1da0a71 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> > @@ -286,11 +286,17 @@ static int mtk_disp_ovl_remove(struct platform_device *pdev)
> > return 0;
> > }
> >
> > +static const struct mtk_ddp_comp_driver_data mt2701_ovl_driver_data = {
> > + .ovl = {0x0040, 1 << 12, 0}
> > +};
> > +
> > static const struct mtk_ddp_comp_driver_data mt8173_ovl_driver_data = {
> > .ovl = {0x0f40, 0, 1 << 12}
> > };
> >
> > static const struct of_device_id mtk_disp_ovl_driver_dt_match[] = {
> > + { .compatible = "mediatek,mt2701-disp-ovl",
> > + .data = &mt2701_ovl_driver_data},
> > { .compatible = "mediatek,mt8173-disp-ovl",
> > .data = &mt8173_ovl_driver_data},
> > {},
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_rdma.c b/drivers/gpu/drm/mediatek/mtk_disp_rdma.c
> > index fb0db50..506a353 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_rdma.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_rdma.c
> > @@ -225,11 +225,17 @@ static int mtk_disp_rdma_remove(struct platform_device *pdev)
> > return 0;
> > }
> >
> > +static const struct mtk_ddp_comp_driver_data mt2701_rdma_driver_data = {
> > + .rdma_fifo_pseudo_size = SZ_4K,
> > +};
> > +
> > static const struct mtk_ddp_comp_driver_data mt8173_rdma_driver_data = {
> > .rdma_fifo_pseudo_size = SZ_8K,
> > };
> >
> > static const struct of_device_id mtk_disp_rdma_driver_dt_match[] = {
> > + { .compatible = "mediatek,mt2701-disp-rdma",
> > + .data = &mt2701_rdma_driver_data},
> > { .compatible = "mediatek,mt8173-disp-rdma",
> > .data = &mt8173_rdma_driver_data},
> > {},
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
> > index fa53806..ee0326a 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
> > @@ -32,6 +32,10 @@
> > #define DISP_REG_CONFIG_DISP_RDMA1_MOUT_EN 0x0c8
> > #define DISP_REG_CONFIG_MMSYS_CG_CON0 0x100
> >
> > +#define DISP_REG_CONFIG_DISP_OVL_MOUT_EN 0x030
> > +#define DISP_REG_CONFIG_OUT_SEL 0x04c
> > +#define DISP_REG_CONFIG_DSI_SEL 0x050
> > +
> > #define DISP_REG_MUTEX_EN(n) (0x20 + 0x20 * (n))
> > #define DISP_REG_MUTEX(n) (0x24 + 0x20 * (n))
> > #define DISP_REG_MUTEX_RST(n) (0x28 + 0x20 * (n))
> > @@ -54,6 +58,13 @@
> > #define MT8173_MUTEX_MOD_DISP_PWM1 BIT(24)
> > #define MT8173_MUTEX_MOD_DISP_OD BIT(25)
> >
> > +#define MT2701_MUTEX_MOD_DISP_OVL BIT(3)
> > +#define MT2701_MUTEX_MOD_DISP_WDMA BIT(6)
> > +#define MT2701_MUTEX_MOD_DISP_COLOR BIT(7)
> > +#define MT2701_MUTEX_MOD_DISP_BLS BIT(9)
> > +#define MT2701_MUTEX_MOD_DISP_RDMA0 BIT(10)
> > +#define MT2701_MUTEX_MOD_DISP_RDMA1 BIT(12)
> > +
> > #define MUTEX_SOF_SINGLE_MODE 0
> > #define MUTEX_SOF_DSI0 1
> > #define MUTEX_SOF_DSI1 2
> > @@ -69,6 +80,10 @@
> > #define DPI0_SEL_IN_RDMA1 0x1
> > #define COLOR1_SEL_IN_OVL1 0x1
> >
> > +#define OVL_MOUT_EN_RDMA 0x1
> > +#define BLS_TO_DSI_RDMA1_TO_DPI1 0x8
> > +#define DSI_SEL_IN_BLS 0x0
> > +
> > struct mtk_disp_mutex {
> > int id;
> > bool claimed;
> > @@ -82,6 +97,15 @@ struct mtk_ddp {
> > const unsigned int *mutex_mod;
> > };
> >
> > +static const unsigned int mt2701_mutex_mod[DDP_COMPONENT_ID_MAX] = {
> > + [DDP_COMPONENT_BLS] = MT2701_MUTEX_MOD_DISP_BLS,
> > + [DDP_COMPONENT_COLOR0] = MT2701_MUTEX_MOD_DISP_COLOR,
> > + [DDP_COMPONENT_OVL0] = MT2701_MUTEX_MOD_DISP_OVL,
> > + [DDP_COMPONENT_RDMA0] = MT2701_MUTEX_MOD_DISP_RDMA0,
> > + [DDP_COMPONENT_RDMA1] = MT2701_MUTEX_MOD_DISP_RDMA1,
> > + [DDP_COMPONENT_WDMA0] = MT2701_MUTEX_MOD_DISP_WDMA,
> > +};
> > +
> > static const unsigned int mt8173_mutex_mod[DDP_COMPONENT_ID_MAX] = {
> > [DDP_COMPONENT_AAL] = MT8173_MUTEX_MOD_DISP_AAL,
> > [DDP_COMPONENT_COLOR0] = MT8173_MUTEX_MOD_DISP_COLOR0,
> > @@ -109,6 +133,9 @@ static unsigned int mtk_ddp_mout_en(enum mtk_ddp_comp_id cur,
> > if (cur == DDP_COMPONENT_OVL0 && next == DDP_COMPONENT_COLOR0) {
> > *addr = DISP_REG_CONFIG_DISP_OVL0_MOUT_EN;
> > value = OVL0_MOUT_EN_COLOR0;
> > + } else if (cur == DDP_COMPONENT_OVL0 && next == DDP_COMPONENT_RDMA0) {
> > + *addr = DISP_REG_CONFIG_DISP_OVL_MOUT_EN;
> > + value = OVL_MOUT_EN_RDMA;
> > } else if (cur == DDP_COMPONENT_OD && next == DDP_COMPONENT_RDMA0) {
> > *addr = DISP_REG_CONFIG_DISP_OD_MOUT_EN;
> > value = OD_MOUT_EN_RDMA0;
> > @@ -146,6 +173,9 @@ static unsigned int mtk_ddp_sel_in(enum mtk_ddp_comp_id cur,
> > } else if (cur == DDP_COMPONENT_OVL1 && next == DDP_COMPONENT_COLOR1) {
> > *addr = DISP_REG_CONFIG_DISP_COLOR1_SEL_IN;
> > value = COLOR1_SEL_IN_OVL1;
> > + } else if (cur == DDP_COMPONENT_BLS && next == DDP_COMPONENT_DSI0) {
> > + *addr = DISP_REG_CONFIG_DSI_SEL;
> > + value = DSI_SEL_IN_BLS;
> > } else {
> > value = 0;
> > }
> > @@ -153,6 +183,14 @@ static unsigned int mtk_ddp_sel_in(enum mtk_ddp_comp_id cur,
> > return value;
> > }
> >
> > +static void mtk_ddp_sout_sel(void __iomem *config_regs,
> > + enum mtk_ddp_comp_id cur, enum mtk_ddp_comp_id next)
> > +{
> > + if (cur == DDP_COMPONENT_BLS && next == DDP_COMPONENT_DSI0)
> > + writel_relaxed(BLS_TO_DSI_RDMA1_TO_DPI1,
> > + config_regs + DISP_REG_CONFIG_OUT_SEL);
> > +}
>
> I think all the connection related modification should be an independent
> patch because it is common code. Like the shadow register patch
> (https://patchwork.kernel.org/patch/9231531/) , even MT8173 do not have
> that feature, we still split it out of this patch because it's not
> MT2701-only feature. I think these connection may happen in some MTK
> soc., so the connection related modification should not be placed in a
> MT2701 patch.
OK, will split it out to a common code patch.

Regards,
yt.shen
>
> > +
> > void mtk_ddp_add_comp_to_path(void __iomem *config_regs,
> > enum mtk_ddp_comp_id cur,
> > enum mtk_ddp_comp_id next)
> > @@ -165,6 +203,8 @@ void mtk_ddp_add_comp_to_path(void __iomem *config_regs,
> > writel_relaxed(reg, config_regs + addr);
> > }
> >
> > + mtk_ddp_sout_sel(config_regs, cur, next);
> > +
> > value = mtk_ddp_sel_in(cur, next, &addr);
> > if (value) {
> > reg = readl_relaxed(config_regs + addr) | value;
> > @@ -362,6 +402,7 @@ static int mtk_ddp_remove(struct platform_device *pdev)
> > }
> >
> > static const struct of_device_id ddp_driver_dt_match[] = {
> > + { .compatible = "mediatek,mt2701-disp-mutex", .data = mt2701_mutex_mod},
> > { .compatible = "mediatek,mt8173-disp-mutex", .data = mt8173_mutex_mod},
> > {},
> > };
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > index 4b4e449..465819b 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > @@ -112,6 +112,7 @@ 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_BLS] = { MTK_DISP_PWM, 0, NULL },
> > [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 },
> > @@ -130,11 +131,17 @@ static const struct mtk_ddp_comp_match mtk_ddp_matches[DDP_COMPONENT_ID_MAX] = {
> > [DDP_COMPONENT_WDMA1] = { MTK_DISP_WDMA, 1, NULL },
> > };
> >
> > +static const struct mtk_ddp_comp_driver_data mt2701_color_driver_data = {
> > + .color_offset = 0x0f00,
> > +};
> > +
> > static const struct mtk_ddp_comp_driver_data mt8173_color_driver_data = {
> > .color_offset = 0x0c00,
> > };
> >
> > static const struct of_device_id mtk_disp_color_driver_dt_match[] = {
> > + { .compatible = "mediatek,mt2701-disp-color",
> > + .data = &mt2701_color_driver_data},
> > { .compatible = "mediatek,mt8173-disp-color",
> > .data = &mt8173_color_driver_data},
> > {},
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > index 53065c7..0850aa4 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > @@ -40,6 +40,7 @@ enum mtk_ddp_comp_type {
> >
> > enum mtk_ddp_comp_id {
> > DDP_COMPONENT_AAL,
> > + DDP_COMPONENT_BLS,
> > DDP_COMPONENT_COLOR0,
> > DDP_COMPONENT_COLOR1,
> > DDP_COMPONENT_DPI0,
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> > index 80b4f54..13cf160 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> > @@ -109,6 +109,19 @@ static const struct drm_mode_config_funcs mtk_drm_mode_config_funcs = {
> > .atomic_commit = mtk_atomic_commit,
> > };
> >
> > +static const enum mtk_ddp_comp_id mt2701_mtk_ddp_main[] = {
> > + DDP_COMPONENT_OVL0,
> > + DDP_COMPONENT_RDMA0,
> > + DDP_COMPONENT_COLOR0,
> > + DDP_COMPONENT_BLS,
> > + DDP_COMPONENT_DSI0,
> > +};
> > +
> > +static const enum mtk_ddp_comp_id mt2701_mtk_ddp_ext[] = {
> > + DDP_COMPONENT_RDMA1,
> > + DDP_COMPONENT_DPI0,
> > +};
> > +
> > static const enum mtk_ddp_comp_id mt8173_mtk_ddp_main[] = {
> > DDP_COMPONENT_OVL0,
> > DDP_COMPONENT_COLOR0,
> > @@ -128,6 +141,14 @@ static const enum mtk_ddp_comp_id mt8173_mtk_ddp_ext[] = {
> > DDP_COMPONENT_DPI0,
> > };
> >
> > +static const struct mtk_mmsys_driver_data mt2701_mmsys_driver_data = {
> > + .main_path = mt2701_mtk_ddp_main,
> > + .main_len = ARRAY_SIZE(mt2701_mtk_ddp_main),
> > + .ext_path = mt2701_mtk_ddp_ext,
> > + .ext_len = ARRAY_SIZE(mt2701_mtk_ddp_ext),
> > + .shadow_register = true,
> > +};
> > +
> > static const struct mtk_mmsys_driver_data mt8173_mmsys_driver_data = {
> > .main_path = mt8173_mtk_ddp_main,
> > .main_len = ARRAY_SIZE(mt8173_mtk_ddp_main),
> > @@ -331,16 +352,24 @@ static const struct component_master_ops mtk_drm_ops = {
> > };
> >
> > static const struct of_device_id mtk_ddp_comp_dt_ids[] = {
> > + { .compatible = "mediatek,mt2701-disp-ovl", .data = (void *)MTK_DISP_OVL },
> > { .compatible = "mediatek,mt8173-disp-ovl", .data = (void *)MTK_DISP_OVL },
> > + { .compatible = "mediatek,mt2701-disp-rdma", .data = (void *)MTK_DISP_RDMA },
> > { .compatible = "mediatek,mt8173-disp-rdma", .data = (void *)MTK_DISP_RDMA },
> > + { .compatible = "mediatek,mt2701-disp-wdma", .data = (void *)MTK_DISP_WDMA },
> > { .compatible = "mediatek,mt8173-disp-wdma", .data = (void *)MTK_DISP_WDMA },
> > + { .compatible = "mediatek,mt2701-disp-color", .data = (void *)MTK_DISP_COLOR },
> > { .compatible = "mediatek,mt8173-disp-color", .data = (void *)MTK_DISP_COLOR },
> > { .compatible = "mediatek,mt8173-disp-aal", .data = (void *)MTK_DISP_AAL},
> > { .compatible = "mediatek,mt8173-disp-gamma", .data = (void *)MTK_DISP_GAMMA, },
> > { .compatible = "mediatek,mt8173-disp-ufoe", .data = (void *)MTK_DISP_UFOE },
> > + { .compatible = "mediatek,mt2701-dsi", .data = (void *)MTK_DSI },
> > { .compatible = "mediatek,mt8173-dsi", .data = (void *)MTK_DSI },
> > + { .compatible = "mediatek,mt2701-dpi", .data = (void *)MTK_DPI },
> > { .compatible = "mediatek,mt8173-dpi", .data = (void *)MTK_DPI },
> > + { .compatible = "mediatek,mt2701-disp-mutex", .data = (void *)MTK_DISP_MUTEX },
> > { .compatible = "mediatek,mt8173-disp-mutex", .data = (void *)MTK_DISP_MUTEX },
> > + { .compatible = "mediatek,mt2701-disp-pwm", .data = (void *)MTK_DISP_PWM },
> > { .compatible = "mediatek,mt8173-disp-pwm", .data = (void *)MTK_DISP_PWM },
> > { .compatible = "mediatek,mt8173-disp-od", .data = (void *)MTK_DISP_OD },
> > { }
> > @@ -514,6 +543,8 @@ static SIMPLE_DEV_PM_OPS(mtk_drm_pm_ops, mtk_drm_sys_suspend,
> > mtk_drm_sys_resume);
> >
> > static const struct of_device_id mtk_drm_of_ids[] = {
> > + { .compatible = "mediatek,mt2701-mmsys",
> > + .data = &mt2701_mmsys_driver_data},
> > { .compatible = "mediatek,mt8173-mmsys",
> > .data = &mt8173_mmsys_driver_data},
> > { }
>
>