drm/mediatek: Add MT8195 ovl driver support

MT8195 ovl driver is similar to MT8183 ovl driver but support
AFBC buffer format.
Signed-off-by: NJustin Green <greenjustin@chromium.org>
Reviewed-by: NAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20221116193335.36320-1-greenjustin@google.com/Signed-off-by: NChun-Kuang Hu <chunkuang.hu@kernel.org>

drivers/gpu/drm/mediatek/mtk_disp_ovl.c

@@ -534,6 +534,15 @@ static const struct mtk_disp_ovl_data mt8192_ovl_2l_driver_data = {
 	.smi_id_en = true,
 };
 
+static const struct mtk_disp_ovl_data mt8195_ovl_driver_data = {
+	.addr = DISP_REG_OVL_ADDR_MT8173,
+	.gmc_bits = 10,
+	.layer_nr = 4,
+	.fmt_rgb565_is_0 = true,
+	.smi_id_en = true,
+	.supports_afbc = true,
+};
+
 static const struct of_device_id mtk_disp_ovl_driver_dt_match[] = {
 	{ .compatible = "mediatek,mt2701-disp-ovl",
 	  .data = &mt2701_ovl_driver_data},
@@ -547,6 +556,8 @@ static const struct of_device_id mtk_disp_ovl_driver_dt_match[] = {
 	  .data = &mt8192_ovl_driver_data},
 	{ .compatible = "mediatek,mt8192-disp-ovl-2l",
 	  .data = &mt8192_ovl_2l_driver_data},
+	{ .compatible = "mediatek,mt8195-disp-ovl",
+	  .data = &mt8195_ovl_driver_data},
 	{},
 };
 MODULE_DEVICE_TABLE(of, mtk_disp_ovl_driver_dt_match);