[PATCH v13,1/3] soc: mediatek: Add all settings to mtk_mmsys_ddp_dpi_fmt_config func

[<xinlei.lee@mediatek.com>]

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

The difference between MT8186 and other ICs is that when modifying the
output format, we need to modify the mmsys_base+0x400 register to take
effect. So when setting the dpi output format, we need to call 
mtk_mmsys_ddp_dpi_fmt_config to set it to MT8186 synchronously.
  
Commit a071e52f75d1 ("soc: mediatek: Add mmsys func to adapt to dpi
output for MT8186") lacked some of the possible output formats and also 
had a wrong bitmask.

Add the missing output formats and fix the bitmask.
  
While at it, also update mtk_mmsys_ddp_dpi_fmt_config() to use generic
formats, so that it is slightly easier to extend for other platforms.
  
Fixes: a071e52f75d1 ("soc: mediatek: Add mmsys func to adapt to dpi output for MT8186")
Signed-off-by: Xinlei Lee <xinlei.lee@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
---
 drivers/soc/mediatek/mt8186-mmsys.h    |  8 +++++---
 drivers/soc/mediatek/mtk-mmsys.c       | 27 ++++++++++++++++++++------
 include/linux/soc/mediatek/mtk-mmsys.h |  7 +++++++
 3 files changed, 33 insertions(+), 9 deletions(-)

diff --git a/drivers/soc/mediatek/mt8186-mmsys.h b/drivers/soc/mediatek/mt8186-mmsys.h
index 09b1ccbc0093..279d4138525b 100644
--- a/drivers/soc/mediatek/mt8186-mmsys.h
+++ b/drivers/soc/mediatek/mt8186-mmsys.h
@@ -5,9 +5,11 @@
 
 /* Values for DPI configuration in MMSYS address space */
 #define MT8186_MMSYS_DPI_OUTPUT_FORMAT		0x400
-#define DPI_FORMAT_MASK					0x1
-#define DPI_RGB888_DDR_CON				BIT(0)
-#define DPI_RGB565_SDR_CON				BIT(1)
+#define MT8186_DPI_FORMAT_MASK				GENMASK(1, 0)
+#define MT8186_DPI_RGB888_SDR_CON			0
+#define MT8186_DPI_RGB888_DDR_CON			1
+#define MT8186_DPI_RGB565_SDR_CON			2
+#define MT8186_DPI_RGB565_DDR_CON			3
 
 #define MT8186_MMSYS_OVL_CON			0xF04
 #define MT8186_MMSYS_OVL0_CON_MASK			0x3
diff --git a/drivers/soc/mediatek/mtk-mmsys.c b/drivers/soc/mediatek/mtk-mmsys.c
index 2e20b24da363..16cd924d8973 100644
--- a/drivers/soc/mediatek/mtk-mmsys.c
+++ b/drivers/soc/mediatek/mtk-mmsys.c
@@ -238,12 +238,27 @@ static void mtk_mmsys_update_bits(struct mtk_mmsys *mmsys, u32 offset, u32 mask,
 
 void mtk_mmsys_ddp_dpi_fmt_config(struct device *dev, u32 val)
 {
-	if (val)
-		mtk_mmsys_update_bits(dev_get_drvdata(dev), MT8186_MMSYS_DPI_OUTPUT_FORMAT,
-				      DPI_RGB888_DDR_CON, DPI_FORMAT_MASK);
-	else
-		mtk_mmsys_update_bits(dev_get_drvdata(dev), MT8186_MMSYS_DPI_OUTPUT_FORMAT,
-				      DPI_RGB565_SDR_CON, DPI_FORMAT_MASK);
+	struct mtk_mmsys *mmsys = dev_get_drvdata(dev);
+
+	switch (val) {
+	case MTK_DPI_RGB888_SDR_CON:
+		mtk_mmsys_update_bits(mmsys, MT8186_MMSYS_DPI_OUTPUT_FORMAT,
+				      MT8186_DPI_FORMAT_MASK, MT8186_DPI_RGB888_SDR_CON);
+		break;
+	case MTK_DPI_RGB565_SDR_CON:
+		mtk_mmsys_update_bits(mmsys, MT8186_MMSYS_DPI_OUTPUT_FORMAT,
+				      MT8186_DPI_FORMAT_MASK, MT8186_DPI_RGB565_SDR_CON);
+		break;
+	case MTK_DPI_RGB565_DDR_CON:
+		mtk_mmsys_update_bits(mmsys, MT8186_MMSYS_DPI_OUTPUT_FORMAT,
+				      MT8186_DPI_FORMAT_MASK, MT8186_DPI_RGB565_DDR_CON);
+		break;
+	case MTK_DPI_RGB888_DDR_CON:
+	default:
+		mtk_mmsys_update_bits(mmsys, MT8186_MMSYS_DPI_OUTPUT_FORMAT,
+				      MT8186_DPI_FORMAT_MASK, MT8186_DPI_RGB888_DDR_CON);
+		break;
+	}
 }
 EXPORT_SYMBOL_GPL(mtk_mmsys_ddp_dpi_fmt_config);
 
diff --git a/include/linux/soc/mediatek/mtk-mmsys.h b/include/linux/soc/mediatek/mtk-mmsys.h
index d2b02bb43768..b85f66db33e1 100644
--- a/include/linux/soc/mediatek/mtk-mmsys.h
+++ b/include/linux/soc/mediatek/mtk-mmsys.h
@@ -9,6 +9,13 @@
 enum mtk_ddp_comp_id;
 struct device;
 
+enum mtk_dpi_out_format_con {
+	MTK_DPI_RGB888_SDR_CON,
+	MTK_DPI_RGB888_DDR_CON,
+	MTK_DPI_RGB565_SDR_CON,
+	MTK_DPI_RGB565_DDR_CON
+};
+
 enum mtk_ddp_comp_id {
 	DDP_COMPONENT_AAL0,
 	DDP_COMPONENT_AAL1,
-- 
2.18.0