drm/mediatek: dsi: Use GENMASK() for register mask definitions

Change magic numerical masks with usage of the GENMASK() macro
to improve readability.

This commit brings no functional changes.

Reviewed-by: Alexandre Mergnat <amergnat@baylibre.com>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://patchwork.kernel.org/project/dri-devel/patch/20240215085316.56835-2-angelogioacchino.delregno@collabora.com/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>

Author: AngeloGioacchino Del Regno

drivers/gpu/drm/mediatek/mtk_dsi.c

@@ -58,18 +58,18 @@
 
 #define DSI_TXRX_CTRL		0x18
 #define VC_NUM				BIT(1)
-#define LANE_NUM			(0xf << 2)
+#define LANE_NUM			GENMASK(5, 2)
 #define DIS_EOT				BIT(6)
 #define NULL_EN				BIT(7)
 #define TE_FREERUN			BIT(8)
 #define EXT_TE_EN			BIT(9)
 #define EXT_TE_EDGE			BIT(10)
-#define MAX_RTN_SIZE			(0xf << 12)
+#define MAX_RTN_SIZE			GENMASK(15, 12)
 #define HSTX_CKLP_EN			BIT(16)
 
 #define DSI_PSCTRL		0x1c
-#define DSI_PS_WC			0x3fff
-#define DSI_PS_SEL			(3 << 16)
+#define DSI_PS_WC			GENMASK(13, 0)
+#define DSI_PS_SEL			GENMASK(17, 16)
 #define PACKED_PS_16BIT_RGB565		(0 << 16)
 #define LOOSELY_PS_18BIT_RGB666		(1 << 16)
 #define PACKED_PS_18BIT_RGB666		(2 << 16)
@@ -109,26 +109,26 @@
 #define LD0_WAKEUP_EN			BIT(2)
 
 #define DSI_PHY_TIMECON0	0x110
-#define LPX				(0xff << 0)
-#define HS_PREP				(0xff << 8)
-#define HS_ZERO				(0xff << 16)
-#define HS_TRAIL			(0xff << 24)
+#define LPX				GENMASK(7, 0)
+#define HS_PREP				GENMASK(15, 8)
+#define HS_ZERO				GENMASK(23, 16)
+#define HS_TRAIL			GENMASK(31, 24)
 
 #define DSI_PHY_TIMECON1	0x114
-#define TA_GO				(0xff << 0)
-#define TA_SURE				(0xff << 8)
-#define TA_GET				(0xff << 16)
-#define DA_HS_EXIT			(0xff << 24)
+#define TA_GO				GENMASK(7, 0)
+#define TA_SURE				GENMASK(15, 8)
+#define TA_GET				GENMASK(23, 16)
+#define DA_HS_EXIT			GENMASK(31, 24)
 
 #define DSI_PHY_TIMECON2	0x118
-#define CONT_DET			(0xff << 0)
-#define CLK_ZERO			(0xff << 16)
-#define CLK_TRAIL			(0xff << 24)
+#define CONT_DET			GENMASK(7, 0)
+#define CLK_ZERO			GENMASK(23, 16)
+#define CLK_TRAIL			GENMASK(31, 24)
 
 #define DSI_PHY_TIMECON3	0x11c
-#define CLK_HS_PREP			(0xff << 0)
-#define CLK_HS_POST			(0xff << 8)
-#define CLK_HS_EXIT			(0xff << 16)
+#define CLK_HS_PREP			GENMASK(7, 0)
+#define CLK_HS_POST			GENMASK(15, 8)
+#define CLK_HS_EXIT			GENMASK(23, 16)
 
 #define DSI_VM_CMD_CON		0x130
 #define VM_CMD_EN			BIT(0)
@@ -138,13 +138,14 @@
 #define FORCE_COMMIT			BIT(0)
 #define BYPASS_SHADOW			BIT(1)
 
-#define CONFIG				(0xff << 0)
+/* CMDQ related bits */
+#define CONFIG				GENMASK(7, 0)
 #define SHORT_PACKET			0
 #define LONG_PACKET			2
 #define BTA				BIT(2)
-#define DATA_ID				(0xff << 8)
-#define DATA_0				(0xff << 16)
-#define DATA_1				(0xff << 24)
+#define DATA_ID				GENMASK(15, 8)
+#define DATA_0				GENMASK(23, 16)
+#define DATA_1				GENMASK(31, 24)
 
 #define NS_TO_CYCLE(n, c)    ((n) / (c) + (((n) % (c)) ? 1 : 0))