drm/mediatek: Set dpi format in mmsys

Dpi output needs to adjust the output format to dual edge for MT8186.
Co-developed-by: Jitao Shi <jitao.shi@mediatek.com>
Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Signed-off-by: Xinlei Lee <xinlei.lee@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Link: https://patchwork.kernel.org/project/linux-mediatek/patch/1666577099-3859-3-git-send-email-xinlei.lee@mediatek.com/Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>

drivers/gpu/drm/mediatek/mtk_dpi.c

@@ -14,6 +14,7 @@
 #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>
@@ -29,6 +30,7 @@
 #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,
@@ -66,6 +68,7 @@ struct mtk_dpi {
 	struct drm_connector *connector;
 	void __iomem *regs;
 	struct device *dev;
+	struct device *mmsys_dev;
 	struct clk *engine_clk;
 	struct clk *pixel_clk;
 	struct clk *tvd_clk;
@@ -134,6 +137,7 @@ 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);
@@ -152,6 +156,7 @@ 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)
@@ -448,8 +453,12 @@ 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);
 	}
 }
 
@@ -777,8 +786,10 @@ 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) {