linux-kernel - [PATCH v4 6/8] drm/mediatek: add matrix bits private data for ccorr

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Message-Id: <20210129073436.2429834-7-hsinyi@chromium.org>
Date:   Fri, 29 Jan 2021 15:34:34 +0800
From:   Hsin-Yi Wang <hsinyi@...omium.org>
To:     CK Hu <ck.hu@...iatek.com>, Philipp Zabel <p.zabel@...gutronix.de>,
        Matthias Brugger <matthias.bgg@...il.com>
Cc:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        Mark Rutland <mark.rutland@....com>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Yongqiang Niu <yongqiang.niu@...iatek.com>
Subject: [PATCH v4 6/8] drm/mediatek: add matrix bits private data for ccorr

From: Yongqiang Niu <yongqiang.niu@...iatek.com>

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

Signed-off-by: Yongqiang Niu <yongqiang.niu@...iatek.com>
Signed-off-by: Hsin-Yi Wang <hsinyi@...omium.org>
---
 drivers/gpu/drm/mediatek/mtk_disp_ccorr.c | 22 +++++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ccorr.c b/drivers/gpu/drm/mediatek/mtk_disp_ccorr.c
index 0c68090eb1e92..1c7163a12f3b1 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_ccorr.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_ccorr.c
@@ -31,8 +31,10 @@
 #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;
 };
 
 /**
@@ -116,6 +118,7 @@ void mtk_ccorr_ctm_set(struct device *dev, struct drm_crtc_state *state)
 	uint16_t coeffs[9] = { 0 };
 	int i;
 	struct cmdq_pkt *cmdq_pkt = NULL;
+	u32 matrix_bits;
 
 	if (!blob)
 		return;
@@ -123,8 +126,16 @@ void mtk_ccorr_ctm_set(struct device *dev, struct drm_crtc_state *state)
 	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],
 		      &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_0);
@@ -205,8 +216,13 @@ 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);
-- 
2.30.0.365.g02bc693789-goog