drm/mediatek: gamma: Add kerneldoc for struct mtk_disp_gamma

The mtk_disp_gamma structure was completely undocumented: add some
kerneldoc documentation to it.

Reviewed-by: CK Hu <[email protected]>
Signed-off-by: AngeloGioacchino Del Regno <[email protected]>
Link: https://patchwork.kernel.org/project/dri-devel/patch/[email protected]/
Signed-off-by: Chun-Kuang Hu <[email protected]>

Author: AngeloGioacchino Del Regno

drivers/gpu/drm/mediatek/mtk_disp_gamma.c

@@ -50,8 +50,12 @@ struct mtk_disp_gamma_data {
 	u8 lut_bits;
 };
 
-/*
- * struct mtk_disp_gamma - DISP_GAMMA driver structure
+/**
+ * struct mtk_disp_gamma - Display Gamma driver structure
+ * @clk:      clock for DISP_GAMMA block
+ * @regs:     MMIO registers base
+ * @cmdq_reg: CMDQ Client register
+ * @data:     platform data for DISP_GAMMA
  */
 struct mtk_disp_gamma {
 	struct clk *clk;