[PATCH v3, 13/15] drm/mediatek: add matrix bits private data for ccorr

[Yongqiang Niu]

matrix bits of mt8183 is 12
matrix bits of mt8192 is 13

Signed-off-by: Yongqiang Niu <yongqiang....@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_disp_ccorr.c | 23 ++++++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ccorr.c 
b/drivers/gpu/drm/mediatek/mtk_disp_ccorr.c
index 63b3ef6..755e75b 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_ccorr.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_ccorr.c
@@ -30,8 +30,10 @@
 #define DISP_CCORR_COEF_3                      0x008C
 #define DISP_CCORR_COEF_4                      0x0090
 
+#define CCORR_MATRIX_BITS                      12
+
 struct mtk_disp_ccorr_data {
-       u32 reserved;
+       u32 matrix_bits;
 };
 
 /**
@@ -96,6 +98,8 @@ static void mtk_ccorr_ctm_set(struct mtk_ddp_comp *comp,
        uint16_t coeffs[9] = { 0 };
        int i;
        struct cmdq_pkt *cmdq_pkt = NULL;
+       struct mtk_disp_ccorr *ccorr = comp_to_ccorr(comp);
+       u32 matrix_bits;
 
        if (!blob)
                return;
@@ -103,8 +107,16 @@ static void mtk_ccorr_ctm_set(struct mtk_ddp_comp *comp,
        ctm = (struct drm_color_ctm *)blob->data;
        input = ctm->matrix;
 
-       for (i = 0; i < ARRAY_SIZE(coeffs); i++)
+       if (ccorr->data)
+               matrix_bits = ccorr->data->matrix_bits;
+       else
+               matrix_bits = CCORR_MATRIX_BITS;
+
+       for (i = 0; i < ARRAY_SIZE(coeffs); i++) {
                coeffs[i] = mtk_ctm_s31_32_to_s1_10(input[i]);
+               if (matrix_bits > CCORR_MATRIX_BITS)
+                       coeffs[i] <<= (matrix_bits - CCORR_MATRIX_BITS);
+       }
 
        mtk_ddp_write(cmdq_pkt, coeffs[0] << 16 | coeffs[1],
                      comp, DISP_CCORR_COEF_0);
@@ -205,8 +217,13 @@ static int mtk_disp_ccorr_remove(struct platform_device 
*pdev)
        return 0;
 }
 
+static const struct mtk_disp_ccorr_data mt8183_ccorr_driver_data = {
+       .matrix_bits = CCORR_MATRIX_BITS,
+};
+
 static const struct of_device_id mtk_disp_ccorr_driver_dt_match[] = {
-       { .compatible = "mediatek,mt8183-disp-ccorr"},
+       { .compatible = "mediatek,mt8183-disp-ccorr",
+         .data = &mt8183_ccorr_driver_data},
        {},
 };
 MODULE_DEVICE_TABLE(of, mtk_disp_ccorr_driver_dt_match);
-- 
1.8.1.1.dirty