Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Hsin-Yi Wang <hsinyi@chromium.org>
To:     CK Hu <ck.hu@mediatek.com>, Philipp Zabel <p.zabel@pengutronix.de>,
        Matthias Brugger <matthias.bgg@gmail.com>
Cc:     David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
        Mark Rutland <mark.rutland@arm.com>,
        dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org,
        Yongqiang Niu <yongqiang.niu@mediatek.com>
Subject: [PATCH v12 5/8] drm/mediatek: add has_dither private data for gamma
Date:   Thu, 28 Jan 2021 19:23:11 +0800
Message-Id: <20210128112314.1304160-6-hsinyi@chromium.org>
In-Reply-To: <20210128112314.1304160-1-hsinyi@chromium.org>
References: <20210128112314.1304160-1-hsinyi@chromium.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

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

Not all SoC has dither function in gamma module.
Add private data to control this function setting.

Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
index 6b520807921e3..5092a27ccc28b 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
@@ -27,7 +27,7 @@
 #define LUT_10BIT_MASK				0x03ff
 
 struct mtk_disp_gamma_data {
-	u32 reserved;
+	bool has_dither;
 };
 
 /**
@@ -93,8 +93,9 @@ void mtk_gamma_config(struct device *dev, unsigned int w,
 
 	mtk_ddp_write(cmdq_pkt, h << 16 | w, &gamma->cmdq_reg, gamma->regs,
 		      DISP_GAMMA_SIZE);
-	mtk_dither_set_common(gamma->regs, &gamma->cmdq_reg, bpc, DISP_GAMMA_CFG,
-			      GAMMA_DITHERING, cmdq_pkt);
+	if (gamma->data && gamma->data->has_dither)
+		mtk_dither_set_common(gamma->regs, &gamma->cmdq_reg, bpc,
+				      DISP_GAMMA_CFG, GAMMA_DITHERING, cmdq_pkt);
 }
 
 void mtk_gamma_start(struct device *dev)
@@ -174,8 +175,13 @@ static int mtk_disp_gamma_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct mtk_disp_gamma_data mt8173_gamma_driver_data = {
+	.has_dither = true,
+};
+
 static const struct of_device_id mtk_disp_gamma_driver_dt_match[] = {
-	{ .compatible = "mediatek,mt8173-disp-gamma"},
+	{ .compatible = "mediatek,mt8173-disp-gamma",
+	  .data = &mt8173_gamma_driver_data},
 	{},
 };
 MODULE_DEVICE_TABLE(of, mtk_disp_gamma_driver_dt_match);
-- 
2.30.0.280.ga3ce27912f-goog