diff mbox series

[v3,2/4] drm/msm/dpu: Enable widebus for DSI INTF

Message ID 20230802-add-widebus-support-v3-2-2661706be001@quicinc.com
State New
Headers show
Series [v3,1/4] drm/msm/dpu: Move DPU encoder wide_bus_en setting | expand

Commit Message

Jessica Zhang Aug. 2, 2023, 6:08 p.m. UTC
DPU supports a data-bus widen mode for DSI INTF.

Enable this mode for all supported chipsets if widebus is enabled for DSI.

Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c          | 11 ++++++++---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c |  4 +++-
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c          |  3 +++
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h          |  1 +
 drivers/gpu/drm/msm/msm_drv.h                        |  6 +++++-
 5 files changed, 20 insertions(+), 5 deletions(-)

Comments

Jessica Zhang Aug. 7, 2023, 9:40 p.m. UTC | #1
On 8/2/2023 11:20 AM, Dmitry Baryshkov wrote:
> On Wed, 2 Aug 2023 at 21:09, Jessica Zhang <quic_jesszhan@quicinc.com> wrote:
>>
>> DPU supports a data-bus widen mode for DSI INTF.
>>
>> Enable this mode for all supported chipsets if widebus is enabled for DSI.
>>
>> Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com>
>> ---
>>   drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c          | 11 ++++++++---
>>   drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c |  4 +++-
>>   drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c          |  3 +++
>>   drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h          |  1 +
>>   drivers/gpu/drm/msm/msm_drv.h                        |  6 +++++-
>>   5 files changed, 20 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>> index 3dcd37c48aac..de08aad39e15 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>> @@ -1196,15 +1196,20 @@ static void dpu_encoder_virt_atomic_enable(struct drm_encoder *drm_enc,
>>          struct drm_display_mode *cur_mode = NULL;
>>          struct msm_drm_private *priv = drm_enc->dev->dev_private;
>>          struct msm_display_info *disp_info;
>> +       int index;
>>
>>          dpu_enc = to_dpu_encoder_virt(drm_enc);
>>          disp_info = &dpu_enc->disp_info;
>>
>> +       disp_info = &dpu_enc->disp_info;
>> +       index = disp_info->h_tile_instance[0];
>> +
>>          dpu_enc->dsc = dpu_encoder_get_dsc_config(drm_enc);
>>
>> -       if (disp_info->intf_type == INTF_DP)
>> -               dpu_enc->wide_bus_en = msm_dp_wide_bus_available(
>> -                               priv->dp[disp_info->h_tile_instance[0]]);
>> +       if (disp_info->intf_type == INTF_DSI)
>> +               dpu_enc->wide_bus_en = msm_dsi_is_widebus_enabled(priv->dsi[index]);
>> +       else if (disp_info->intf_type == INTF_DP)
>> +               dpu_enc->wide_bus_en = msm_dp_wide_bus_available(priv->dp[index]);
> 
> If you change the order, you won't have to touch DP lines.

Hi Dmitry,

Acked.

> 
>>
>>          mutex_lock(&dpu_enc->enc_lock);
>>          cur_mode = &dpu_enc->base.crtc->state->adjusted_mode;
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
>> index df88358e7037..dace6168be2d 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
>> @@ -69,8 +69,10 @@ static void _dpu_encoder_phys_cmd_update_intf_cfg(
>>                                  phys_enc->hw_intf,
>>                                  phys_enc->hw_pp->idx);
>>
>> -       if (intf_cfg.dsc != 0)
>> +       if (intf_cfg.dsc != 0) {
>>                  cmd_mode_cfg.data_compress = true;
>> +               cmd_mode_cfg.wide_bus_en = dpu_encoder_is_widebus_enabled(phys_enc->parent);
>> +       }
> 
> This embeds the knowledge that a wide bus can only be enabled when DSC
> is in use. Please move the wide_bus_en assignment out of conditional
> code.

Wide bus for DSI will only be enabled if DSC is enabled, so this is 
technically not wrong, as DP will use the video mode path.

> 
>>
>>          if (phys_enc->hw_intf->ops.program_intf_cmd_cfg)
>>                  phys_enc->hw_intf->ops.program_intf_cmd_cfg(phys_enc->hw_intf, &cmd_mode_cfg);
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
>> index 8ec6505d9e78..dc6f3febb574 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
>> @@ -521,6 +521,9 @@ static void dpu_hw_intf_program_intf_cmd_cfg(struct dpu_hw_intf *ctx,
> 
> This function is only enabled for DPU >= 7.0, while IIRC wide bus can
> be enabled even for some of the earlier chipsets.

The command mode path is only called for DSI, which only supports wide 
bus for DPU 7.0+.

> 
>>          if (cmd_mode_cfg->data_compress)
>>                  intf_cfg2 |= INTF_CFG2_DCE_DATA_COMPRESS;
>>
>> +       if (cmd_mode_cfg->wide_bus_en)
>> +               intf_cfg2 |= INTF_CFG2_DATABUS_WIDEN;
>> +
>>          DPU_REG_WRITE(&ctx->hw, INTF_CONFIG2, intf_cfg2);
>>   }
>>
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
>> index 77f80531782b..c539025c418b 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
>> @@ -50,6 +50,7 @@ struct dpu_hw_intf_status {
>>
>>   struct dpu_hw_intf_cmd_mode_cfg {
>>          u8 data_compress;       /* enable data compress between dpu and dsi */
>> +       u8 wide_bus_en;         /* enable databus widen mode */
>>   };
>>
>>   /**
>> diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
>> index 9d9d5e009163..e4f706b16aad 100644
>> --- a/drivers/gpu/drm/msm/msm_drv.h
>> +++ b/drivers/gpu/drm/msm/msm_drv.h
>> @@ -344,6 +344,7 @@ void msm_dsi_snapshot(struct msm_disp_state *disp_state, struct msm_dsi *msm_dsi
>>   bool msm_dsi_is_cmd_mode(struct msm_dsi *msm_dsi);
>>   bool msm_dsi_is_bonded_dsi(struct msm_dsi *msm_dsi);
>>   bool msm_dsi_is_master_dsi(struct msm_dsi *msm_dsi);
>> +bool msm_dsi_is_widebus_enabled(struct msm_dsi *msm_dsi);
>>   struct drm_dsc_config *msm_dsi_get_dsc_config(struct msm_dsi *msm_dsi);
>>   #else
>>   static inline void __init msm_dsi_register(void)
>> @@ -373,7 +374,10 @@ static inline bool msm_dsi_is_master_dsi(struct msm_dsi *msm_dsi)
>>   {
>>          return false;
>>   }
>> -
>> +static inline bool msm_dsi_is_widebus_enabled(struct msm_dsi *msm_dsi)
>> +{
>> +       return false;
>> +}
> 
> Empty line, please.

Acked.

Thanks,

Jessica Zhang

> 
>>   static inline struct drm_dsc_config *msm_dsi_get_dsc_config(struct msm_dsi *msm_dsi)
>>   {
>>          return NULL;
>>
>> --
>> 2.41.0
>>
> 
> 
> -- 
> With best wishes
> Dmitry
Jessica Zhang Aug. 7, 2023, 10:21 p.m. UTC | #2
On 8/2/2023 12:39 PM, Marijn Suijten wrote:
> On 2023-08-02 11:08:49, Jessica Zhang wrote:
>> DPU supports a data-bus widen mode for DSI INTF.
>>
>> Enable this mode for all supported chipsets if widebus is enabled for DSI.
>>
>> Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com>
>> ---
>>   drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c          | 11 ++++++++---
>>   drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c |  4 +++-
>>   drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c          |  3 +++
>>   drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h          |  1 +
>>   drivers/gpu/drm/msm/msm_drv.h                        |  6 +++++-
>>   5 files changed, 20 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>> index 3dcd37c48aac..de08aad39e15 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>> @@ -1196,15 +1196,20 @@ static void dpu_encoder_virt_atomic_enable(struct drm_encoder *drm_enc,
>>   	struct drm_display_mode *cur_mode = NULL;
>>   	struct msm_drm_private *priv = drm_enc->dev->dev_private;
>>   	struct msm_display_info *disp_info;
>> +	int index;
>>   
>>   	dpu_enc = to_dpu_encoder_virt(drm_enc);
>>   	disp_info = &dpu_enc->disp_info;
>>   
>> +	disp_info = &dpu_enc->disp_info;
>> +	index = disp_info->h_tile_instance[0];
>> +
>>   	dpu_enc->dsc = dpu_encoder_get_dsc_config(drm_enc);
>>   
>> -	if (disp_info->intf_type == INTF_DP)
>> -		dpu_enc->wide_bus_en = msm_dp_wide_bus_available(
>> -				priv->dp[disp_info->h_tile_instance[0]]);
>> +	if (disp_info->intf_type == INTF_DSI)
>> +		dpu_enc->wide_bus_en = msm_dsi_is_widebus_enabled(priv->dsi[index]);
>> +	else if (disp_info->intf_type == INTF_DP)
>> +		dpu_enc->wide_bus_en = msm_dp_wide_bus_available(priv->dp[index]);
> 
> This inconsistency really is killing.  wide_bus vs widebus, and one
> function has an is_ while the other does not.

Hi Marijn,

Acked. Will change the DSI function name to match DP.

> 
>>   
>>   	mutex_lock(&dpu_enc->enc_lock);
>>   	cur_mode = &dpu_enc->base.crtc->state->adjusted_mode;
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
>> index df88358e7037..dace6168be2d 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
>> @@ -69,8 +69,10 @@ static void _dpu_encoder_phys_cmd_update_intf_cfg(
>>   				phys_enc->hw_intf,
>>   				phys_enc->hw_pp->idx);
>>   
>> -	if (intf_cfg.dsc != 0)
>> +	if (intf_cfg.dsc != 0) {
>>   		cmd_mode_cfg.data_compress = true;
>> +		cmd_mode_cfg.wide_bus_en = dpu_encoder_is_widebus_enabled(phys_enc->parent);
>> +	}
>>   
>>   	if (phys_enc->hw_intf->ops.program_intf_cmd_cfg)
>>   		phys_enc->hw_intf->ops.program_intf_cmd_cfg(phys_enc->hw_intf, &cmd_mode_cfg);
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
>> index 8ec6505d9e78..dc6f3febb574 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
>> @@ -521,6 +521,9 @@ static void dpu_hw_intf_program_intf_cmd_cfg(struct dpu_hw_intf *ctx,
>>   	if (cmd_mode_cfg->data_compress)
>>   		intf_cfg2 |= INTF_CFG2_DCE_DATA_COMPRESS;
>>   
>> +	if (cmd_mode_cfg->wide_bus_en)
>> +		intf_cfg2 |= INTF_CFG2_DATABUS_WIDEN;
>> +
>>   	DPU_REG_WRITE(&ctx->hw, INTF_CONFIG2, intf_cfg2);
>>   }
>>   
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
>> index 77f80531782b..c539025c418b 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
>> @@ -50,6 +50,7 @@ struct dpu_hw_intf_status {
>>   
>>   struct dpu_hw_intf_cmd_mode_cfg {
>>   	u8 data_compress;	/* enable data compress between dpu and dsi */
>> +	u8 wide_bus_en;		/* enable databus widen mode */
> 
> Any clue why these weren't just bool types?  These suffix-comments also
> aren't adhering to the kerneldoc format, or is there a different
> variant?

It seems that the `u8` declaration and comment docs were meant to mirror 
the other dpu_hw_intf_* structs [1]

[1] 
https://elixir.bootlin.com/linux/v6.5-rc5/source/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h#L44

> 
>>   };
>>   
>>   /**
>> diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
>> index 9d9d5e009163..e4f706b16aad 100644
>> --- a/drivers/gpu/drm/msm/msm_drv.h
>> +++ b/drivers/gpu/drm/msm/msm_drv.h
>> @@ -344,6 +344,7 @@ void msm_dsi_snapshot(struct msm_disp_state *disp_state, struct msm_dsi *msm_dsi
>>   bool msm_dsi_is_cmd_mode(struct msm_dsi *msm_dsi);
>>   bool msm_dsi_is_bonded_dsi(struct msm_dsi *msm_dsi);
>>   bool msm_dsi_is_master_dsi(struct msm_dsi *msm_dsi);
>> +bool msm_dsi_is_widebus_enabled(struct msm_dsi *msm_dsi);
>>   struct drm_dsc_config *msm_dsi_get_dsc_config(struct msm_dsi *msm_dsi);
>>   #else
>>   static inline void __init msm_dsi_register(void)
>> @@ -373,7 +374,10 @@ static inline bool msm_dsi_is_master_dsi(struct msm_dsi *msm_dsi)
>>   {
>>   	return false;
>>   }
>> -
>> +static inline bool msm_dsi_is_widebus_enabled(struct msm_dsi *msm_dsi)
>> +{
>> +	return false;
>> +}
> 
> Only this default inline implementation is defined, but the function is
> declared in this commit.  Since there's no real functional
> implementation yet your commit should clarify that it comes later (in a
> followup commit in the same series?  I can't know because I am reviewing
> this series linearly from start to finish...) or reorder the patches so
> that this lack of clarity is circumvented entirely.

This was so that there wouldn't be a compiler error in cases where 
CONFIG_MSM_DSI=n (since DPU support is added before DSI support).

Thanks,

Jessica Zhang

> 
> - Marijn
> 
>>   static inline struct drm_dsc_config *msm_dsi_get_dsc_config(struct msm_dsi *msm_dsi)
>>   {
>>   	return NULL;
>>
>> -- 
>> 2.41.0
>>
Dmitry Baryshkov Aug. 17, 2023, 5:07 p.m. UTC | #3
On 08/08/2023 00:40, Jessica Zhang wrote:
> 
> 
> On 8/2/2023 11:20 AM, Dmitry Baryshkov wrote:
>> On Wed, 2 Aug 2023 at 21:09, Jessica Zhang <quic_jesszhan@quicinc.com> 
>> wrote:

>>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c 
>>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
>>> index df88358e7037..dace6168be2d 100644
>>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
>>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
>>> @@ -69,8 +69,10 @@ static void _dpu_encoder_phys_cmd_update_intf_cfg(
>>>                                  phys_enc->hw_intf,
>>>                                  phys_enc->hw_pp->idx);
>>>
>>> -       if (intf_cfg.dsc != 0)
>>> +       if (intf_cfg.dsc != 0) {
>>>                  cmd_mode_cfg.data_compress = true;
>>> +               cmd_mode_cfg.wide_bus_en = 
>>> dpu_encoder_is_widebus_enabled(phys_enc->parent);
>>> +       }
>>
>> This embeds the knowledge that a wide bus can only be enabled when DSC
>> is in use. Please move the wide_bus_en assignment out of conditional
>> code.
> 
> Wide bus for DSI will only be enabled if DSC is enabled, so this is 
> technically not wrong, as DP will use the video mode path.
> 
>>
>>>
>>>          if (phys_enc->hw_intf->ops.program_intf_cmd_cfg)
>>>                  
>>> phys_enc->hw_intf->ops.program_intf_cmd_cfg(phys_enc->hw_intf, 
>>> &cmd_mode_cfg);
>>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c 
>>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
>>> index 8ec6505d9e78..dc6f3febb574 100644
>>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
>>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
>>> @@ -521,6 +521,9 @@ static void 
>>> dpu_hw_intf_program_intf_cmd_cfg(struct dpu_hw_intf *ctx,
>>
>> This function is only enabled for DPU >= 7.0, while IIRC wide bus can
>> be enabled even for some of the earlier chipsets.
> 
> The command mode path is only called for DSI, which only supports wide 
> bus for DPU 7.0+.

After second consideration, let's ignore this part, as wide bus will 
only be enabled for DSI / CMD after 7.0. If we ever have SoC that has 
CMD + wide_bus earlier than 5.0, we can reconsider this code pice.

Can you please add a comment that the register itself is present earlier 
(5.0), but it doesn't have to be programmed since the flags will not be 
set anyway.

> 
>>
>>>          if (cmd_mode_cfg->data_compress)
>>>                  intf_cfg2 |= INTF_CFG2_DCE_DATA_COMPRESS;
>>>
>>> +       if (cmd_mode_cfg->wide_bus_en)
>>> +               intf_cfg2 |= INTF_CFG2_DATABUS_WIDEN;
>>> +
>>>          DPU_REG_WRITE(&ctx->hw, INTF_CONFIG2, intf_cfg2);
>>>   }
>>>
diff mbox series

Patch

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 3dcd37c48aac..de08aad39e15 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -1196,15 +1196,20 @@  static void dpu_encoder_virt_atomic_enable(struct drm_encoder *drm_enc,
 	struct drm_display_mode *cur_mode = NULL;
 	struct msm_drm_private *priv = drm_enc->dev->dev_private;
 	struct msm_display_info *disp_info;
+	int index;
 
 	dpu_enc = to_dpu_encoder_virt(drm_enc);
 	disp_info = &dpu_enc->disp_info;
 
+	disp_info = &dpu_enc->disp_info;
+	index = disp_info->h_tile_instance[0];
+
 	dpu_enc->dsc = dpu_encoder_get_dsc_config(drm_enc);
 
-	if (disp_info->intf_type == INTF_DP)
-		dpu_enc->wide_bus_en = msm_dp_wide_bus_available(
-				priv->dp[disp_info->h_tile_instance[0]]);
+	if (disp_info->intf_type == INTF_DSI)
+		dpu_enc->wide_bus_en = msm_dsi_is_widebus_enabled(priv->dsi[index]);
+	else if (disp_info->intf_type == INTF_DP)
+		dpu_enc->wide_bus_en = msm_dp_wide_bus_available(priv->dp[index]);
 
 	mutex_lock(&dpu_enc->enc_lock);
 	cur_mode = &dpu_enc->base.crtc->state->adjusted_mode;
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
index df88358e7037..dace6168be2d 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
@@ -69,8 +69,10 @@  static void _dpu_encoder_phys_cmd_update_intf_cfg(
 				phys_enc->hw_intf,
 				phys_enc->hw_pp->idx);
 
-	if (intf_cfg.dsc != 0)
+	if (intf_cfg.dsc != 0) {
 		cmd_mode_cfg.data_compress = true;
+		cmd_mode_cfg.wide_bus_en = dpu_encoder_is_widebus_enabled(phys_enc->parent);
+	}
 
 	if (phys_enc->hw_intf->ops.program_intf_cmd_cfg)
 		phys_enc->hw_intf->ops.program_intf_cmd_cfg(phys_enc->hw_intf, &cmd_mode_cfg);
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
index 8ec6505d9e78..dc6f3febb574 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
@@ -521,6 +521,9 @@  static void dpu_hw_intf_program_intf_cmd_cfg(struct dpu_hw_intf *ctx,
 	if (cmd_mode_cfg->data_compress)
 		intf_cfg2 |= INTF_CFG2_DCE_DATA_COMPRESS;
 
+	if (cmd_mode_cfg->wide_bus_en)
+		intf_cfg2 |= INTF_CFG2_DATABUS_WIDEN;
+
 	DPU_REG_WRITE(&ctx->hw, INTF_CONFIG2, intf_cfg2);
 }
 
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
index 77f80531782b..c539025c418b 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.h
@@ -50,6 +50,7 @@  struct dpu_hw_intf_status {
 
 struct dpu_hw_intf_cmd_mode_cfg {
 	u8 data_compress;	/* enable data compress between dpu and dsi */
+	u8 wide_bus_en;		/* enable databus widen mode */
 };
 
 /**
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index 9d9d5e009163..e4f706b16aad 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -344,6 +344,7 @@  void msm_dsi_snapshot(struct msm_disp_state *disp_state, struct msm_dsi *msm_dsi
 bool msm_dsi_is_cmd_mode(struct msm_dsi *msm_dsi);
 bool msm_dsi_is_bonded_dsi(struct msm_dsi *msm_dsi);
 bool msm_dsi_is_master_dsi(struct msm_dsi *msm_dsi);
+bool msm_dsi_is_widebus_enabled(struct msm_dsi *msm_dsi);
 struct drm_dsc_config *msm_dsi_get_dsc_config(struct msm_dsi *msm_dsi);
 #else
 static inline void __init msm_dsi_register(void)
@@ -373,7 +374,10 @@  static inline bool msm_dsi_is_master_dsi(struct msm_dsi *msm_dsi)
 {
 	return false;
 }
-
+static inline bool msm_dsi_is_widebus_enabled(struct msm_dsi *msm_dsi)
+{
+	return false;
+}
 static inline struct drm_dsc_config *msm_dsi_get_dsc_config(struct msm_dsi *msm_dsi)
 {
 	return NULL;