[PATCH 1/7] drm/mediatek: Add CCORR component support for MT8196

[Jay Liu <jay.liu@mediatek.com>]

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>
---
 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[] = {
-- 
2.18.0