[v4,1/9] drm/mediatek: dsi: Use GENMASK() for register mask definitions

Message ID 20240206120748.136610-2-angelogioacchino.delregno@collabora.com
State New
Headers
Series MediaTek DRM - DSI driver cleanups |

Commit Message

AngeloGioacchino Del Regno Feb. 6, 2024, 12:07 p.m. UTC
  Change magic numerical masks with usage of the GENMASK() macro
to improve readability.

While at it, also fix the DSI_PS_SEL mask to include all bits instead
of just a subset of them.

This commit brings no functional changes.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 drivers/gpu/drm/mediatek/mtk_dsi.c | 45 +++++++++++++++---------------
 1 file changed, 23 insertions(+), 22 deletions(-)
  

Comments

Alexandre Mergnat Feb. 6, 2024, 2:47 p.m. UTC | #1
On 06/02/2024 13:07, AngeloGioacchino Del Regno wrote:
> Change magic numerical masks with usage of the GENMASK() macro
> to improve readability.
> 
> While at it, also fix the DSI_PS_SEL mask to include all bits instead
> of just a subset of them.
> 
> This commit brings no functional changes.
> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> ---
>   drivers/gpu/drm/mediatek/mtk_dsi.c | 45 +++++++++++++++---------------
>   1 file changed, 23 insertions(+), 22 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
> index a2fdfc8ddb15..3b7392c03b4d 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dsi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
> @@ -58,18 +58,18 @@
>   

..snip...

>   #define DSI_PSCTRL		0x1c
> -#define DSI_PS_WC			0x3fff
> -#define DSI_PS_SEL			(3 << 16)
> +#define DSI_PS_WC			GENMASK(14, 0)
> +#define DSI_PS_SEL			GENMASK(19, 16)

0011 0000 0000 0000 0000 => 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)
  
AngeloGioacchino Del Regno Feb. 6, 2024, 3:53 p.m. UTC | #2
Il 06/02/24 15:47, Alexandre Mergnat ha scritto:
> 
> 
> On 06/02/2024 13:07, AngeloGioacchino Del Regno wrote:
>> Change magic numerical masks with usage of the GENMASK() macro
>> to improve readability.
>>
>> While at it, also fix the DSI_PS_SEL mask to include all bits instead
>> of just a subset of them.
>>
>> This commit brings no functional changes.
>>
>> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
>> ---
>>   drivers/gpu/drm/mediatek/mtk_dsi.c | 45 +++++++++++++++---------------
>>   1 file changed, 23 insertions(+), 22 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
>> index a2fdfc8ddb15..3b7392c03b4d 100644
>> --- a/drivers/gpu/drm/mediatek/mtk_dsi.c
>> +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
>> @@ -58,18 +58,18 @@
> 
> ...snip...
> 
>>   #define DSI_PSCTRL        0x1c
>> -#define DSI_PS_WC            0x3fff
>> -#define DSI_PS_SEL            (3 << 16)
>> +#define DSI_PS_WC            GENMASK(14, 0)
>> +#define DSI_PS_SEL            GENMASK(19, 16)
> 
> 0011 0000 0000 0000 0000 => GENMASK(17, 16)

Alexandre, the reason for that is in the commit description :-P

"While at it, also fix the DSI_PS_SEL mask to include all bits instead
of just a subset of them."

Thanks for the reviews, btw!

Cheers!
Angelo

> 
>>   #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)
>
  
Alexandre Mergnat Feb. 7, 2024, 9:55 a.m. UTC | #3
On 06/02/2024 16:53, AngeloGioacchino Del Regno wrote:
>>>   #define DSI_PSCTRL        0x1c
>>> -#define DSI_PS_WC            0x3fff
>>> -#define DSI_PS_SEL            (3 << 16)
>>> +#define DSI_PS_WC            GENMASK(14, 0)
>>> +#define DSI_PS_SEL            GENMASK(19, 16)
>>
>> 0011 0000 0000 0000 0000 => GENMASK(17, 16)
> 
> Alexandre, the reason for that is in the commit description :-P
> 
> "While at it, also fix the DSI_PS_SEL mask to include all bits instead
> of just a subset of them."

Oh sorry...

Reviewed-by: Alexandre Mergnat <amergnat@baylibre.com>
  

Patch

diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
index a2fdfc8ddb15..3b7392c03b4d 100644
--- a/drivers/gpu/drm/mediatek/mtk_dsi.c
+++ b/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(14, 0)
+#define DSI_PS_SEL			GENMASK(19, 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))