<html><body><p> <pre> On Wed, 2025-02-19 at 13:49 +0100, AngeloGioacchino Del Regno wrote: > External email : Please do not click links or open attachments until > you have verified the sender or the content. > > > Il 19/02/25 10:20, Jay Liu ha scritto: > > Add CCORR component support for MT8196. > > > > CCORR is a hardware module that optimizes the visual effects of > > images by adjusting the color matrix, enabling features such as > > night light. > > > > The 8196 hardware platform includes two CCORR (Color Correction) > > units. > > However, the `mtk_ccorr_ctm_set` API only utilizes one of these > > units. > > To prevent the unused CCORR unit from inadvertently taking effect, > > we need to block it by adding mandatory_ccorr flag in the > > driver_data. > > > > Signed-off-by: Jay Liu <jay.liu@mediatek.com> > > This is yet another thing that can be resolved by using OF Graph for > defining the > display pipeline: by using that, I don't see how can CCORR1 be used > instead of > CCORR0, if the latter is in the pipeline, but not the former. > > NACK. > > Regards, > Angelo > hi Angelo, thank you for your review, The 8196 IC has two CCORRs, and they must be chained together in a fixed order, for example: MDP_RSZ0->DISP_TDSHP0->DISP_CCORR0- >DISP_CC0RR1->DISP_GAMMA0->DISP_POSTMASK0->DISP_DITHER0. Among them, DISP_CCORR0 is used for ctm_set, and DISP_CCORR1 was originally for PQ functions, but the current project does not have PQ functions, so relay can be used. Moreover, ctm_set only needs to configure one CCORR, so currently, mandatory_ccorr is set. Considering that previous ICs, such as 8195, only have one CCORR, so mandatory_ccorr is set to DISP_CCORR0. This is the current practice. Do you have any other suggestions to achieve similar things? For example, adding a property in the dts to set mandatory_ccorr, but this will inevitably change the dts of past ICs, and we are worried that such changes will be significant. Thanks a lot JAY > > --- > > drivers/gpu/drm/mediatek/mtk_ddp_comp.c | 3 ++- > > drivers/gpu/drm/mediatek/mtk_disp_ccorr.c | 16 ++++++++++++++++ > > 2 files changed, 18 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/gpu/drm/mediatek/mtk_ddp_comp.c > > b/drivers/gpu/drm/mediatek/mtk_ddp_comp.c > > index edc6417639e6..d7e230bac53e 100644 > > --- a/drivers/gpu/drm/mediatek/mtk_ddp_comp.c > > +++ b/drivers/gpu/drm/mediatek/mtk_ddp_comp.c > > @@ -457,7 +457,8 @@ static const struct mtk_ddp_comp_match > > mtk_ddp_matches[DDP_COMPONENT_DRM_ID_MAX] > > [DDP_COMPONENT_AAL0] = { > > MTK_DISP_AAL, 0, &ddp_aal }, > > [DDP_COMPONENT_AAL1] = { > > MTK_DISP_AAL, 1, &ddp_aal }, > > [DDP_COMPONENT_BLS] = { > > MTK_DISP_BLS, 0, NULL }, > > - [DDP_COMPONENT_CCORR] = { > > MTK_DISP_CCORR, 0, &ddp_ccorr }, > > + [DDP_COMPONENT_CCORR0] = { > > MTK_DISP_CCORR, 0, &ddp_ccorr }, > > + [DDP_COMPONENT_CCORR1] = { > > MTK_DISP_CCORR, 1, &ddp_ccorr }, > > [DDP_COMPONENT_COLOR0] = { > > MTK_DISP_COLOR, 0, &ddp_color }, > > [DDP_COMPONENT_COLOR1] = { > > MTK_DISP_COLOR, 1, &ddp_color }, > > [DDP_COMPONENT_DITHER0] = { > > MTK_DISP_DITHER, 0, &ddp_dither }, > > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ccorr.c > > b/drivers/gpu/drm/mediatek/mtk_disp_ccorr.c > > index 10d60d2c2a56..94e82b3fa2d8 100644 > > --- a/drivers/gpu/drm/mediatek/mtk_disp_ccorr.c > > +++ b/drivers/gpu/drm/mediatek/mtk_disp_ccorr.c > > @@ -31,11 +31,13 @@ > > > > struct mtk_disp_ccorr_data { > > u32 matrix_bits; > > + enum mtk_ddp_comp_id mandatory_ccorr; > > }; > > > > struct mtk_disp_ccorr { > > struct clk *clk; > > void __iomem *regs; > > + enum mtk_ddp_comp_id comp_id; > > struct cmdq_client_reg cmdq_reg; > > const struct mtk_disp_ccorr_data *data; > > }; > > @@ -115,6 +117,9 @@ void mtk_ccorr_ctm_set(struct device *dev, > > struct drm_crtc_state *state) > > if (!blob) > > return; > > > > + if (ccorr->comp_id != ccorr->data->mandatory_ccorr) > > + return; > > + > > ctm = (struct drm_color_ctm *)blob->data; > > input = ctm->matrix; > > > > @@ -154,6 +159,7 @@ static int mtk_disp_ccorr_probe(struct > > platform_device *pdev) > > struct device *dev = &pdev->dev; > > struct mtk_disp_ccorr *priv; > > int ret; > > + enum mtk_ddp_comp_id comp_id; > > > > priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); > > if (!priv) > > @@ -169,6 +175,14 @@ static int mtk_disp_ccorr_probe(struct > > platform_device *pdev) > > return dev_err_probe(dev, PTR_ERR(priv->regs), > > "failed to ioremap ccorr\n"); > > > > + comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DISP_CCORR); > > + if (comp_id < 0) { > > + dev_err(dev, "Failed to identify by alias: %d\n", > > comp_id); > > + return comp_id; > > + } > > + > > + priv->comp_id = comp_id; > > + > > #if IS_REACHABLE(CONFIG_MTK_CMDQ) > > ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0); > > if (ret) > > @@ -192,10 +206,12 @@ static void mtk_disp_ccorr_remove(struct > > platform_device *pdev) > > > > static const struct mtk_disp_ccorr_data mt8183_ccorr_driver_data > > = { > > .matrix_bits = 10, > > + .mandatory_ccorr = DDP_COMPONENT_CCORR0, > > }; > > > > static const struct mtk_disp_ccorr_data mt8192_ccorr_driver_data > > = { > > .matrix_bits = 11, > > + .mandatory_ccorr = DDP_COMPONENT_CCORR0, > > }; > > > > static const struct of_device_id mtk_disp_ccorr_driver_dt_match[] > > = { > > </pre> </p></body></html><pre>************* MEDIATEK Confidentiality Notice ******************** The information contained in this e-mail message (including any attachments) may be confidential, proprietary, privileged, or otherwise exempt from disclosure under applicable laws. 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