drm/mediatek: gamma: Add support for MT8195

Now that this driver supports 12-bit LUTs, we can add support for the
DISP_GAMMA found on the MT8195 SoC: add its driver data and compatible.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Link: https://patchwork.kernel.org/project/dri-devel/patch/20231012095736.100784-12-angelogioacchino.delregno@collabora.com/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>

Author: AngeloGioacchino Del Regno

drivers/gpu/drm/mediatek/mtk_disp_gamma.c

@@ -283,11 +283,20 @@ static const struct mtk_disp_gamma_data mt8183_gamma_driver_data = {
 	.lut_size = 512,
 };
 
+static const struct mtk_disp_gamma_data mt8195_gamma_driver_data = {
+	.lut_bank_size = 256,
+	.lut_bits = 12,
+	.lut_diff = true,
+	.lut_size = 1024,
+};
+
 static const struct of_device_id mtk_disp_gamma_driver_dt_match[] = {
 	{ .compatible = "mediatek,mt8173-disp-gamma",
 	  .data = &mt8173_gamma_driver_data},
 	{ .compatible = "mediatek,mt8183-disp-gamma",
 	  .data = &mt8183_gamma_driver_data},
+	{ .compatible = "mediatek,mt8195-disp-gamma",
+	  .data = &mt8195_gamma_driver_data},
 	{},
 };
 MODULE_DEVICE_TABLE(of, mtk_disp_gamma_driver_dt_match);