linux-kernel - [PATCH v9,2/3] drm: mediatek: Set dpi format in mmsys

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Message-ID: <1663922440-20242-3-git-send-email-xinlei.lee@mediatek.com>
Date:   Fri, 23 Sep 2022 16:40:39 +0800
From:   <xinlei.lee@...iatek.com>
To:     <matthias.bgg@...il.com>, <jason-jh.lin@...iatek.com>,
        <angelogioacchino.delregno@...labora.com>,
        <rex-bc.chen@...iatek.com>, <ck.hu@...iatek.com>,
        <p.zabel@...gutronix.de>, <airlied@...ux.ie>, <daniel@...ll.ch>
CC:     <dri-devel@...ts.freedesktop.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        <jitao.shi@...iatek.com>, Xinlei Lee <xinlei.lee@...iatek.com>
Subject: [PATCH v9,2/3] drm: mediatek: Set dpi format in mmsys

From: Xinlei Lee <xinlei.lee@...iatek.com>

Due to the mt8186 hardware changes, we need to modify the dpi output
format corresponding to the mmsys register(mmsys_base+0x400).

Co-developed-by: Jitao Shi <jitao.shi@...iatek.com>
Signed-off-by: Jitao Shi <jitao.shi@...iatek.com>
Signed-off-by: Xinlei Lee <xinlei.lee@...iatek.com>
---
 drivers/gpu/drm/mediatek/mtk_dpi.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
index 630a4e301ef6..bd1870a8504a 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -15,6 +15,7 @@
 #include <linux/of_graph.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/platform_device.h>
+#include <linux/soc/mediatek/mtk-mmsys.h>
 #include <linux/types.h>
 
 #include <video/videomode.h>
@@ -30,6 +31,7 @@
 #include "mtk_disp_drv.h"
 #include "mtk_dpi_regs.h"
 #include "mtk_drm_ddp_comp.h"
+#include "mtk_drm_drv.h"
 
 enum mtk_dpi_out_bit_num {
 	MTK_DPI_OUT_BIT_NUM_8BITS,
@@ -82,6 +84,7 @@ struct mtk_dpi {
 	struct pinctrl_state *pins_dpi;
 	u32 output_fmt;
 	int refcount;
+	struct device *mmsys_dev;
 };
 
 static inline struct mtk_dpi *bridge_to_dpi(struct drm_bridge *b)
@@ -135,6 +138,7 @@ struct mtk_dpi_yc_limit {
  * @yuv422_en_bit: Enable bit of yuv422.
  * @csc_enable_bit: Enable bit of CSC.
  * @pixels_per_iter: Quantity of transferred pixels per iteration.
+ * @edge_cfg_in_mmsys: If the edge configuration for DPI's output needs to be set in MMSYS.
  */
 struct mtk_dpi_conf {
 	unsigned int (*cal_factor)(int clock);
@@ -153,6 +157,7 @@ struct mtk_dpi_conf {
 	u32 yuv422_en_bit;
 	u32 csc_enable_bit;
 	u32 pixels_per_iter;
+	bool edge_cfg_in_mmsys;
 };
 
 static void mtk_dpi_mask(struct mtk_dpi *dpi, u32 offset, u32 val, u32 mask)
@@ -449,8 +454,12 @@ static void mtk_dpi_dual_edge(struct mtk_dpi *dpi)
 		mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING,
 			     dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE ?
 			     EDGE_SEL : 0, EDGE_SEL);
+		if (dpi->conf->edge_cfg_in_mmsys)
+			mtk_mmsys_ddp_dpi_fmt_config(dpi->mmsys_dev, MTK_DPI_RGB888_DDR_CON);
 	} else {
 		mtk_dpi_mask(dpi, DPI_DDR_SETTING, DDR_EN | DDR_4PHASE, 0);
+		if (dpi->conf->edge_cfg_in_mmsys)
+			mtk_mmsys_ddp_dpi_fmt_config(dpi->mmsys_dev, MTK_DPI_RGB888_SDR_CON);
 	}
 }
 
@@ -778,8 +787,10 @@ static int mtk_dpi_bind(struct device *dev, struct device *master, void *data)
 {
 	struct mtk_dpi *dpi = dev_get_drvdata(dev);
 	struct drm_device *drm_dev = data;
+	struct mtk_drm_private *priv = drm_dev->dev_private;
 	int ret;
 
+	dpi->mmsys_dev = priv->mmsys_dev;
 	ret = drm_simple_encoder_init(drm_dev, &dpi->encoder,
 				      DRM_MODE_ENCODER_TMDS);
 	if (ret) {
-- 
2.18.0