[PATCH v2,0/3] Add mt8188 compatiable for DSI cmd packet control

[PATCH v2,0/3] Add mt8188 compatiable for DSI cmd packet control

[Shuijing Li]

Add dt-binding documentation of DSI for MediaTek MT8188 SoC.
Because of the difference between SOC and DSI cmd packet control, for
MT8188, it is necessary to increase the DSI_CMDQ_SIZE control when
sending long packets to initialize the panel. Of course, this will not
affect the sending of short packets.

Base on the branch of linus/master v6.4.

Shuijing Li (3):
  dt-bindings: display: mediatek: dsi: Add compatible for MediaTek
    MT8188
  drm/mediatek: Add mt8188 dsi compatible to mtk_dsi.c
  drm/mediatek: dsi: Add dsi cmdq_ctl to send panel initial code

 .../bindings/display/mediatek/mediatek,dsi.yaml   |  1 +
 drivers/gpu/drm/mediatek/mtk_drm_drv.c            |  2 ++
 drivers/gpu/drm/mediatek/mtk_dsi.c                | 15 +++++++++++++++
 3 files changed, 18 insertions(+)

-- 
2.40.1

[PATCH v2, 1/3] dt-bindings: display: mediatek: dsi: Add compatible for MediaTek MT8188

[Shuijing Li]

Add dt-binding documentation of dsi for MediaTek MT8188 SoC.

Signed-off-by: Shuijing Li <shuijing.li@mediatek.com>
Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
---
 .../devicetree/bindings/display/mediatek/mediatek,dsi.yaml       | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.yaml
index 4707b60238b0..13fa76299254 100644
--- a/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.yaml
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.yaml
@@ -29,6 +29,7 @@ properties:
       - mediatek,mt8173-dsi
       - mediatek,mt8183-dsi
       - mediatek,mt8186-dsi
+      - mediatek,mt8188-dsi
 
   reg:
     maxItems: 1
-- 
2.40.1

[PATCH v2,2/3] drm/mediatek: Add mt8188 dsi compatible to mtk_dsi.c

[Shuijing Li]

Add the compatible because there are different definitions for cmdq
register bit control in mt8188.

Signed-off-by: Shuijing Li <shuijing.li@mediatek.com>
Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 ++
 drivers/gpu/drm/mediatek/mtk_dsi.c     | 8 ++++++++
 2 files changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 6dcb4ba2466c..0070894d0148 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -764,6 +764,8 @@ static const struct of_device_id mtk_ddp_comp_dt_ids[] = {
 	  .data = (void *)MTK_DSI },
 	{ .compatible = "mediatek,mt8186-dsi",
 	  .data = (void *)MTK_DSI },
+	{ .compatible = "mediatek,mt8188-dsi",
+	  .data = (void *)MTK_DSI },
 	{ }
 };
 
diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
index 7d5250351193..500a3054282d 100644
--- a/drivers/gpu/drm/mediatek/mtk_dsi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
@@ -1208,6 +1208,12 @@ static const struct mtk_dsi_driver_data mt8186_dsi_driver_data = {
 	.has_size_ctl = true,
 };
 
+static const struct mtk_dsi_driver_data mt8188_dsi_driver_data = {
+	.reg_cmdq_off = 0xd00,
+	.has_shadow_ctl = true,
+	.has_size_ctl = true,
+};
+
 static const struct of_device_id mtk_dsi_of_match[] = {
 	{ .compatible = "mediatek,mt2701-dsi",
 	  .data = &mt2701_dsi_driver_data },
@@ -1217,6 +1223,8 @@ static const struct of_device_id mtk_dsi_of_match[] = {
 	  .data = &mt8183_dsi_driver_data },
 	{ .compatible = "mediatek,mt8186-dsi",
 	  .data = &mt8186_dsi_driver_data },
+	{ .compatible = "mediatek,mt8188-dsi",
+	  .data = &mt8188_dsi_driver_data },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, mtk_dsi_of_match);
-- 
2.40.1

[PATCH v2, 3/3] drm/mediatek: dsi: Add dsi cmdq_ctl to send panel initial code

[Shuijing Li]

For mt8188, add dsi cmdq reg control to send long packets to panel
initialization.

Signed-off-by: Shuijing Li <shuijing.li@mediatek.com>
Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
---
Changes in v2:
use mtk_dsi_mask(dsi, DSI_CMDQ_SIZE, CMDQ_SIZE_SEL, CMDQ_SIZE_SEL); directly,
per suggestion from the previous thread:
https://lore.kernel.org/lkml/015f4c60-ed77-9e1f-8a6b-cda6e4f6ac93@gmail.com/
---
 drivers/gpu/drm/mediatek/mtk_dsi.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
index 500a3054282d..8b43d9f48178 100644
--- a/drivers/gpu/drm/mediatek/mtk_dsi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
@@ -86,6 +86,7 @@
 
 #define DSI_CMDQ_SIZE		0x60
 #define CMDQ_SIZE			0x3f
+#define CMDQ_SIZE_SEL			BIT(15)
 
 #define DSI_HSTX_CKL_WC		0x64
 
@@ -178,6 +179,7 @@ struct mtk_dsi_driver_data {
 	const u32 reg_cmdq_off;
 	bool has_shadow_ctl;
 	bool has_size_ctl;
+	bool cmdq_long_packet_ctl;
 };
 
 struct mtk_dsi {
@@ -996,6 +998,8 @@ static void mtk_dsi_cmdq(struct mtk_dsi *dsi, const struct mipi_dsi_msg *msg)
 
 	mtk_dsi_mask(dsi, reg_cmdq_off, cmdq_mask, reg_val);
 	mtk_dsi_mask(dsi, DSI_CMDQ_SIZE, CMDQ_SIZE, cmdq_size);
+	if (dsi->driver_data->cmdq_long_packet_ctl)
+		mtk_dsi_mask(dsi, DSI_CMDQ_SIZE, CMDQ_SIZE_SEL, CMDQ_SIZE_SEL);
 }
 
 static ssize_t mtk_dsi_host_send_cmd(struct mtk_dsi *dsi,
@@ -1200,18 +1204,21 @@ static const struct mtk_dsi_driver_data mt8183_dsi_driver_data = {
 	.reg_cmdq_off = 0x200,
 	.has_shadow_ctl = true,
 	.has_size_ctl = true,
+	.cmdq_long_packet_ctl = false,
 };
 
 static const struct mtk_dsi_driver_data mt8186_dsi_driver_data = {
 	.reg_cmdq_off = 0xd00,
 	.has_shadow_ctl = true,
 	.has_size_ctl = true,
+	.cmdq_long_packet_ctl = false,
 };
 
 static const struct mtk_dsi_driver_data mt8188_dsi_driver_data = {
 	.reg_cmdq_off = 0xd00,
 	.has_shadow_ctl = true,
 	.has_size_ctl = true,
+	.cmdq_long_packet_ctl = true,
 };
 
 static const struct of_device_id mtk_dsi_of_match[] = {
-- 
2.40.1

Re: [PATCH v2, 3/3] drm/mediatek: dsi: Add dsi cmdq_ctl to send panel initial code

[Matthias Brugger]

On 16/06/2023 09:36, Shuijing Li wrote:
> For mt8188, add dsi cmdq reg control to send long packets to panel
> initialization.
> 
> Signed-off-by: Shuijing Li <shuijing.li@mediatek.com>
> Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>

Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>

> ---
> Changes in v2:
> use mtk_dsi_mask(dsi, DSI_CMDQ_SIZE, CMDQ_SIZE_SEL, CMDQ_SIZE_SEL); directly,
> per suggestion from the previous thread:
> https://lore.kernel.org/lkml/015f4c60-ed77-9e1f-8a6b-cda6e4f6ac93@gmail.com/
> ---
>   drivers/gpu/drm/mediatek/mtk_dsi.c | 7 +++++++
>   1 file changed, 7 insertions(+)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
> index 500a3054282d..8b43d9f48178 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dsi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
> @@ -86,6 +86,7 @@
>   
>   #define DSI_CMDQ_SIZE		0x60
>   #define CMDQ_SIZE			0x3f
> +#define CMDQ_SIZE_SEL			BIT(15)
>   
>   #define DSI_HSTX_CKL_WC		0x64
>   
> @@ -178,6 +179,7 @@ struct mtk_dsi_driver_data {
>   	const u32 reg_cmdq_off;
>   	bool has_shadow_ctl;
>   	bool has_size_ctl;
> +	bool cmdq_long_packet_ctl;
>   };
>   
>   struct mtk_dsi {
> @@ -996,6 +998,8 @@ static void mtk_dsi_cmdq(struct mtk_dsi *dsi, const struct mipi_dsi_msg *msg)
>   
>   	mtk_dsi_mask(dsi, reg_cmdq_off, cmdq_mask, reg_val);
>   	mtk_dsi_mask(dsi, DSI_CMDQ_SIZE, CMDQ_SIZE, cmdq_size);
> +	if (dsi->driver_data->cmdq_long_packet_ctl)
> +		mtk_dsi_mask(dsi, DSI_CMDQ_SIZE, CMDQ_SIZE_SEL, CMDQ_SIZE_SEL);
>   }
>   
>   static ssize_t mtk_dsi_host_send_cmd(struct mtk_dsi *dsi,
> @@ -1200,18 +1204,21 @@ static const struct mtk_dsi_driver_data mt8183_dsi_driver_data = {
>   	.reg_cmdq_off = 0x200,
>   	.has_shadow_ctl = true,
>   	.has_size_ctl = true,
> +	.cmdq_long_packet_ctl = false,
>   };
>   
>   static const struct mtk_dsi_driver_data mt8186_dsi_driver_data = {
>   	.reg_cmdq_off = 0xd00,
>   	.has_shadow_ctl = true,
>   	.has_size_ctl = true,
> +	.cmdq_long_packet_ctl = false,
>   };
>   
>   static const struct mtk_dsi_driver_data mt8188_dsi_driver_data = {
>   	.reg_cmdq_off = 0xd00,
>   	.has_shadow_ctl = true,
>   	.has_size_ctl = true,
> +	.cmdq_long_packet_ctl = true,
>   };
>   
>   static const struct of_device_id mtk_dsi_of_match[] = {

Re: [PATCH v2, 3/3] drm/mediatek: dsi: Add dsi cmdq_ctl to send panel initial code

[Shuijing Li (李水静)]

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Hi CK,

Gentle ping for this patch, if there is anything I need to modify,
please kindly let me know.

Thanks.

On Mon, 2023-06-19 at 17:20 +0200, Matthias Brugger wrote:
External email : Please do not click links or open attachments until you have verified the sender or the content.



On 16/06/2023 09:36, Shuijing Li wrote:

> For mt8188, add dsi cmdq reg control to send long packets to panel

> initialization.

>

> Signed-off-by: Shuijing Li <shuijing.li@mediatek.com>

> Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>


Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>


> ---

> Changes in v2:

> use mtk_dsi_mask(dsi, DSI_CMDQ_SIZE, CMDQ_SIZE_SEL, CMDQ_SIZE_SEL); directly,

> per suggestion from the previous thread:

> https://lore.kernel.org/lkml/015f4c60-ed77-9e1f-8a6b-cda6e4f6ac93@gmail.com/

> ---

>   drivers/gpu/drm/mediatek/mtk_dsi.c | 7 +++++++

>   1 file changed, 7 insertions(+)

>

> diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c

> index 500a3054282d..8b43d9f48178 100644

> --- a/drivers/gpu/drm/mediatek/mtk_dsi.c

> +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c

> @@ -86,6 +86,7 @@

>

>   #define DSI_CMDQ_SIZE0x60

>   #define CMDQ_SIZE0x3f

> +#define CMDQ_SIZE_SELBIT(15)

>

>   #define DSI_HSTX_CKL_WC0x64

>

> @@ -178,6 +179,7 @@ struct mtk_dsi_driver_data {

>   const u32 reg_cmdq_off;

>   bool has_shadow_ctl;

>   bool has_size_ctl;

> +bool cmdq_long_packet_ctl;

>   };

>

>   struct mtk_dsi {

> @@ -996,6 +998,8 @@ static void mtk_dsi_cmdq(struct mtk_dsi *dsi, const struct mipi_dsi_msg *msg)

>

>   mtk_dsi_mask(dsi, reg_cmdq_off, cmdq_mask, reg_val);

>   mtk_dsi_mask(dsi, DSI_CMDQ_SIZE, CMDQ_SIZE, cmdq_size);

> +if (dsi->driver_data->cmdq_long_packet_ctl)

> +mtk_dsi_mask(dsi, DSI_CMDQ_SIZE, CMDQ_SIZE_SEL, CMDQ_SIZE_SEL);

>   }

>

>   static ssize_t mtk_dsi_host_send_cmd(struct mtk_dsi *dsi,

> @@ -1200,18 +1204,21 @@ static const struct mtk_dsi_driver_data mt8183_dsi_driver_data = {

>   .reg_cmdq_off = 0x200,

>   .has_shadow_ctl = true,

>   .has_size_ctl = true,

> +.cmdq_long_packet_ctl = false,

>   };

>

>   static const struct mtk_dsi_driver_data mt8186_dsi_driver_data = {

>   .reg_cmdq_off = 0xd00,

>   .has_shadow_ctl = true,

>   .has_size_ctl = true,

> +.cmdq_long_packet_ctl = false,

>   };

>

>   static const struct mtk_dsi_driver_data mt8188_dsi_driver_data = {

>   .reg_cmdq_off = 0xd00,

>   .has_shadow_ctl = true,

>   .has_size_ctl = true,

> +.cmdq_long_packet_ctl = true,

>   };

>

>   static const struct of_device_id mtk_dsi_of_match[] = {


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Re: [PATCH v2,2/3] drm/mediatek: Add mt8188 dsi compatible to mtk_dsi.c

[CK Hu (胡俊光)]

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Hi, Shuijing:

On Fri, 2023-06-16 at 15:36 +0800, Shuijing Li wrote:
> Add the compatible because there are different definitions for cmdq
> register bit control in mt8188.
> 
> Signed-off-by: Shuijing Li <shuijing.li@mediatek.com>
> Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 ++
>  drivers/gpu/drm/mediatek/mtk_dsi.c     | 8 ++++++++
>  2 files changed, 10 insertions(+)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> index 6dcb4ba2466c..0070894d0148 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> @@ -764,6 +764,8 @@ static const struct of_device_id
> mtk_ddp_comp_dt_ids[] = {
>  	  .data = (void *)MTK_DSI },
>  	{ .compatible = "mediatek,mt8186-dsi",
>  	  .data = (void *)MTK_DSI },
> +	{ .compatible = "mediatek,mt8188-dsi",
> +	  .data = (void *)MTK_DSI },
>  	{ }
>  };
>  
> diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c
> b/drivers/gpu/drm/mediatek/mtk_dsi.c
> index 7d5250351193..500a3054282d 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dsi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
> @@ -1208,6 +1208,12 @@ static const struct mtk_dsi_driver_data
> mt8186_dsi_driver_data = {
>  	.has_size_ctl = true,
>  };
>  
> +static const struct mtk_dsi_driver_data mt8188_dsi_driver_data = {
> +	.reg_cmdq_off = 0xd00,
> +	.has_shadow_ctl = true,
> +	.has_size_ctl = true,
> +};
> +
>  static const struct of_device_id mtk_dsi_of_match[] = {
>  	{ .compatible = "mediatek,mt2701-dsi",
>  	  .data = &mt2701_dsi_driver_data },
> @@ -1217,6 +1223,8 @@ static const struct of_device_id
> mtk_dsi_of_match[] = {
>  	  .data = &mt8183_dsi_driver_data },
>  	{ .compatible = "mediatek,mt8186-dsi",
>  	  .data = &mt8186_dsi_driver_data },
> +	{ .compatible = "mediatek,mt8188-dsi",
> +	  .data = &mt8188_dsi_driver_data },

mt8188_dsi_driver_data is identical to mt8186_dsi_driver_data, so use
mt8186_dsi_driver_data and drop mt8188_dsi_driver_data.

Regards,
CK

>  	{ },
>  };
>  MODULE_DEVICE_TABLE(of, mtk_dsi_of_match);

Re: [PATCH v2,2/3] drm/mediatek: Add mt8188 dsi compatible to mtk_dsi.c

[CK Hu (胡俊光)]

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Hi, Shuijing:

On Thu, 2023-09-07 at 14:08 +0800, CK Hu wrote:
> Hi, Shuijing:
> 
> On Fri, 2023-06-16 at 15:36 +0800, Shuijing Li wrote:
> > Add the compatible because there are different definitions for cmdq
> > register bit control in mt8188.
> > 
> > Signed-off-by: Shuijing Li <shuijing.li@mediatek.com>
> > Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
> > Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
> > ---
> >  drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 ++
> >  drivers/gpu/drm/mediatek/mtk_dsi.c     | 8 ++++++++
> >  2 files changed, 10 insertions(+)
> > 
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> > b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> > index 6dcb4ba2466c..0070894d0148 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> > @@ -764,6 +764,8 @@ static const struct of_device_id
> > mtk_ddp_comp_dt_ids[] = {
> >  	  .data = (void *)MTK_DSI },
> >  	{ .compatible = "mediatek,mt8186-dsi",
> >  	  .data = (void *)MTK_DSI },
> > +	{ .compatible = "mediatek,mt8188-dsi",
> > +	  .data = (void *)MTK_DSI },
> >  	{ }
> >  };
> >  
> > diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c
> > b/drivers/gpu/drm/mediatek/mtk_dsi.c
> > index 7d5250351193..500a3054282d 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_dsi.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
> > @@ -1208,6 +1208,12 @@ static const struct mtk_dsi_driver_data
> > mt8186_dsi_driver_data = {
> >  	.has_size_ctl = true,
> >  };
> >  
> > +static const struct mtk_dsi_driver_data mt8188_dsi_driver_data = {
> > +	.reg_cmdq_off = 0xd00,
> > +	.has_shadow_ctl = true,
> > +	.has_size_ctl = true,
> > +};
> > +
> >  static const struct of_device_id mtk_dsi_of_match[] = {
> >  	{ .compatible = "mediatek,mt2701-dsi",
> >  	  .data = &mt2701_dsi_driver_data },
> > @@ -1217,6 +1223,8 @@ static const struct of_device_id
> > mtk_dsi_of_match[] = {
> >  	  .data = &mt8183_dsi_driver_data },
> >  	{ .compatible = "mediatek,mt8186-dsi",
> >  	  .data = &mt8186_dsi_driver_data },
> > +	{ .compatible = "mediatek,mt8188-dsi",
> > +	  .data = &mt8188_dsi_driver_data },
> 
> mt8188_dsi_driver_data is identical to mt8186_dsi_driver_data, so use
> mt8186_dsi_driver_data and drop mt8188_dsi_driver_data.

Sorry that next patch would make mt8188_dsi_driver_data different than
mt8186_dsi_driver_data. So reorder this patch to be after the next
patch.

Regards,
CK

> 
> Regards,
> CK
> 
> >  	{ },
> >  };
> >  MODULE_DEVICE_TABLE(of, mtk_dsi_of_match);

Re: [PATCH v2, 3/3] drm/mediatek: dsi: Add dsi cmdq_ctl to send panel initial code

[CK Hu (胡俊光)]

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Hi, Shuijing:

On Fri, 2023-06-16 at 15:36 +0800, Shuijing Li wrote:
> For mt8188, add dsi cmdq reg control to send long packets to panel
> initialization.

If possible, describe more about WHY mt8188 need this but other SoC
does not need this.

> 
> Signed-off-by: Shuijing Li <shuijing.li@mediatek.com>
> Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
> ---
> Changes in v2:
> use mtk_dsi_mask(dsi, DSI_CMDQ_SIZE, CMDQ_SIZE_SEL, CMDQ_SIZE_SEL);
> directly,
> per suggestion from the previous thread:
> 
https://lore.kernel.org/lkml/015f4c60-ed77-9e1f-8a6b-cda6e4f6ac93@gmail.com/
> ---
>  drivers/gpu/drm/mediatek/mtk_dsi.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c
> b/drivers/gpu/drm/mediatek/mtk_dsi.c
> index 500a3054282d..8b43d9f48178 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dsi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
> @@ -86,6 +86,7 @@
>  
>  #define DSI_CMDQ_SIZE		0x60
>  #define CMDQ_SIZE			0x3f
> +#define CMDQ_SIZE_SEL			BIT(15)
>  
>  #define DSI_HSTX_CKL_WC		0x64
>  
> @@ -178,6 +179,7 @@ struct mtk_dsi_driver_data {
>  	const u32 reg_cmdq_off;
>  	bool has_shadow_ctl;
>  	bool has_size_ctl;
> +	bool cmdq_long_packet_ctl;
>  };
>  
>  struct mtk_dsi {
> @@ -996,6 +998,8 @@ static void mtk_dsi_cmdq(struct mtk_dsi *dsi,
> const struct mipi_dsi_msg *msg)
>  
>  	mtk_dsi_mask(dsi, reg_cmdq_off, cmdq_mask, reg_val);
>  	mtk_dsi_mask(dsi, DSI_CMDQ_SIZE, CMDQ_SIZE, cmdq_size);
> +	if (dsi->driver_data->cmdq_long_packet_ctl)
> +		mtk_dsi_mask(dsi, DSI_CMDQ_SIZE, CMDQ_SIZE_SEL,
> CMDQ_SIZE_SEL);
>  }
>  
>  static ssize_t mtk_dsi_host_send_cmd(struct mtk_dsi *dsi,
> @@ -1200,18 +1204,21 @@ static const struct mtk_dsi_driver_data
> mt8183_dsi_driver_data = {
>  	.reg_cmdq_off = 0x200,
>  	.has_shadow_ctl = true,
>  	.has_size_ctl = true,
> +	.cmdq_long_packet_ctl = false,

Global variable default value is 0, so this modification could be
dropped.

>  };
>  
>  static const struct mtk_dsi_driver_data mt8186_dsi_driver_data = {
>  	.reg_cmdq_off = 0xd00,
>  	.has_shadow_ctl = true,
>  	.has_size_ctl = true,
> +	.cmdq_long_packet_ctl = false,

Ditto.

Regards,
CK

>  };
>  
>  static const struct mtk_dsi_driver_data mt8188_dsi_driver_data = {
>  	.reg_cmdq_off = 0xd00,
>  	.has_shadow_ctl = true,
>  	.has_size_ctl = true,
> +	.cmdq_long_packet_ctl = true,
>  };
>  
>  static const struct of_device_id mtk_dsi_of_match[] = {