Hi, Jason: jason-jh.lin <jason-jh.lin@xxxxxxxxxxxx> 於 2021年9月21日 週二 下午11:52寫道： > > DSC is designed for real-time systems with real-time compression, > transmission, decompression and display. > The DSC standard is a specification of the algorithms used for > compressing and decompressing image display streams, including > the specification of the syntax and semantics of the compressed > video bit stream. Reviewed-by: Chun-Kuang Hu <chunkuang.hu@xxxxxxxxxx> > > Signed-off-by: jason-jh.lin <jason-jh.lin@xxxxxxxxxxxx> > --- > rebase on series [1] > > [1] drm/mediatek: add support for mediatek SOC MT8192 > - https://patchwork.kernel.org/project/linux-mediatek/list/?series=529489 > --- > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 47 +++++++++++++++++++++ > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 + > 2 files changed, 48 insertions(+) > > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c > index 23c03e550658..ce6c90b9edef 100644 > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c > @@ -40,6 +40,12 @@ > #define DITHER_LSB_ERR_SHIFT_G(x) (((x) & 0x7) << 12) > #define DITHER_ADD_LSHIFT_G(x) (((x) & 0x7) << 4) > > +#define DISP_REG_DSC_CON 0x0000 > +#define DSC_EN BIT(0) > +#define DSC_DUAL_INOUT BIT(2) > +#define DSC_BYPASS BIT(4) > +#define DSC_UFOE_SEL BIT(16) > + > #define DISP_REG_OD_EN 0x0000 > #define DISP_REG_OD_CFG 0x0020 > #define OD_RELAYMODE BIT(0) > @@ -181,6 +187,36 @@ static void mtk_dither_set(struct device *dev, unsigned int bpc, > DISP_DITHERING, cmdq_pkt); > } > > +static void mtk_dsc_config(struct device *dev, unsigned int w, > + unsigned int h, unsigned int vrefresh, > + unsigned int bpc, struct cmdq_pkt *cmdq_pkt) > +{ > + struct mtk_ddp_comp_dev *priv = dev_get_drvdata(dev); > + > + /* dsc bypass mode */ > + mtk_ddp_write_mask(cmdq_pkt, DSC_BYPASS, &priv->cmdq_reg, priv->regs, > + DISP_REG_DSC_CON, DSC_BYPASS); > + mtk_ddp_write_mask(cmdq_pkt, DSC_UFOE_SEL, &priv->cmdq_reg, priv->regs, > + DISP_REG_DSC_CON, DSC_UFOE_SEL); > + mtk_ddp_write_mask(cmdq_pkt, DSC_DUAL_INOUT, &priv->cmdq_reg, priv->regs, > + DISP_REG_DSC_CON, DSC_DUAL_INOUT); > +} > + > +static void mtk_dsc_start(struct device *dev) > +{ > + struct mtk_ddp_comp_dev *priv = dev_get_drvdata(dev); > + > + /* write with mask to reserve the value set in mtk_dsc_config */ > + mtk_ddp_write_mask(NULL, DSC_EN, &priv->cmdq_reg, priv->regs, DISP_REG_DSC_CON, DSC_EN); > +} > + > +static void mtk_dsc_stop(struct device *dev) > +{ > + struct mtk_ddp_comp_dev *priv = dev_get_drvdata(dev); > + > + writel_relaxed(0x0, priv->regs + DISP_REG_DSC_CON); > +} > + > static void mtk_od_config(struct device *dev, unsigned int w, > unsigned int h, unsigned int vrefresh, > unsigned int bpc, struct cmdq_pkt *cmdq_pkt) > @@ -270,6 +306,14 @@ static const struct mtk_ddp_comp_funcs ddp_dpi = { > .stop = mtk_dpi_stop, > }; > > +static const struct mtk_ddp_comp_funcs ddp_dsc = { > + .clk_enable = mtk_ddp_clk_enable, > + .clk_disable = mtk_ddp_clk_disable, > + .config = mtk_dsc_config, > + .start = mtk_dsc_start, > + .stop = mtk_dsc_stop, > +}; > + > static const struct mtk_ddp_comp_funcs ddp_dsi = { > .start = mtk_dsi_ddp_start, > .stop = mtk_dsi_ddp_stop, > @@ -339,6 +383,7 @@ static const char * const mtk_ddp_comp_stem[MTK_DDP_COMP_TYPE_MAX] = { > [MTK_DISP_CCORR] = "ccorr", > [MTK_DISP_COLOR] = "color", > [MTK_DISP_DITHER] = "dither", > + [MTK_DISP_DSC] = "dsc", > [MTK_DISP_GAMMA] = "gamma", > [MTK_DISP_MUTEX] = "mutex", > [MTK_DISP_OD] = "od", > @@ -369,6 +414,8 @@ static const struct mtk_ddp_comp_match mtk_ddp_matches[DDP_COMPONENT_ID_MAX] = { > [DDP_COMPONENT_DITHER] = { MTK_DISP_DITHER, 0, &ddp_dither }, > [DDP_COMPONENT_DPI0] = { MTK_DPI, 0, &ddp_dpi }, > [DDP_COMPONENT_DPI1] = { MTK_DPI, 1, &ddp_dpi }, > + [DDP_COMPONENT_DSC0] = { MTK_DISP_DSC, 0, &ddp_dsc }, > + [DDP_COMPONENT_DSC1] = { MTK_DISP_DSC, 1, &ddp_dsc }, > [DDP_COMPONENT_DSI0] = { MTK_DSI, 0, &ddp_dsi }, > [DDP_COMPONENT_DSI1] = { MTK_DSI, 1, &ddp_dsi }, > [DDP_COMPONENT_DSI2] = { MTK_DSI, 2, &ddp_dsi }, > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h > index 4c6a98662305..5e6ff12f16ad 100644 > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h > @@ -23,6 +23,7 @@ enum mtk_ddp_comp_type { > MTK_DISP_CCORR, > MTK_DISP_COLOR, > MTK_DISP_DITHER, > + MTK_DISP_DSC, > MTK_DISP_GAMMA, > MTK_DISP_MUTEX, > MTK_DISP_OD, > -- > 2.18.0 >
