soc: mediatek: mutex: Add support for MT6795 Helio X10 display mutex

MT6795 has the same mutex mod/sof register layout as MT2712 and MT8173,
but supports only four SOF, as it has two DSI and one DPI.
Support is added by reusing most of the MT8173 data, with the addition
of a mt6795-specific SOF array (and devicetree compatible, of course).
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220913140121.403637-3-angelogioacchino.delregno@collabora.comSigned-off-by: Matthias Brugger <matthias.bgg@gmail.com>

drivers/soc/mediatek/mtk-mutex.c

@@ -400,6 +400,13 @@ static const unsigned int mt2712_mutex_sof[DDP_MUTEX_SOF_MAX] = {
 	[MUTEX_SOF_DSI3] = MUTEX_SOF_DSI3,
 };
 
+static const unsigned int mt6795_mutex_sof[DDP_MUTEX_SOF_MAX] = {
+	[MUTEX_SOF_SINGLE_MODE] = MUTEX_SOF_SINGLE_MODE,
+	[MUTEX_SOF_DSI0] = MUTEX_SOF_DSI0,
+	[MUTEX_SOF_DSI1] = MUTEX_SOF_DSI1,
+	[MUTEX_SOF_DPI0] = MUTEX_SOF_DPI0,
+};
+
 static const unsigned int mt8167_mutex_sof[DDP_MUTEX_SOF_MAX] = {
 	[MUTEX_SOF_SINGLE_MODE] = MUTEX_SOF_SINGLE_MODE,
 	[MUTEX_SOF_DSI0] = MUTEX_SOF_DSI0,
@@ -454,6 +461,13 @@ static const struct mtk_mutex_data mt2712_mutex_driver_data = {
 	.mutex_sof_reg = MT2701_MUTEX0_SOF0,
 };
 
+static const struct mtk_mutex_data mt6795_mutex_driver_data = {
+	.mutex_mod = mt8173_mutex_mod,
+	.mutex_sof = mt6795_mutex_sof,
+	.mutex_mod_reg = MT2701_MUTEX0_MOD0,
+	.mutex_sof_reg = MT2701_MUTEX0_SOF0,
+};
+
 static const struct mtk_mutex_data mt8167_mutex_driver_data = {
 	.mutex_mod = mt8167_mutex_mod,
 	.mutex_sof = mt8167_mutex_sof,
@@ -828,6 +842,8 @@ static const struct of_device_id mutex_driver_dt_match[] = {
 	  .data = &mt2701_mutex_driver_data},
 	{ .compatible = "mediatek,mt2712-disp-mutex",
 	  .data = &mt2712_mutex_driver_data},
+	{ .compatible = "mediatek,mt6795-disp-mutex",
+	  .data = &mt6795_mutex_driver_data},
 	{ .compatible = "mediatek,mt8167-disp-mutex",
 	  .data = &mt8167_mutex_driver_data},
 	{ .compatible = "mediatek,mt8173-disp-mutex",