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[PATCH v6 4/8] drm/bridge: mhdp8546: Set input_bus_flags from atomic_check

Aradhya Bhatia posted 8 patches 2 years, 9 months ago
There is a newer version of this series
[PATCH v6 4/8] drm/bridge: mhdp8546: Set input_bus_flags from atomic_check
Posted by Aradhya Bhatia 2 years, 9 months ago 
From: Nikhil Devshatwar <nikhil.nd@ti.com>

input_bus_flags are specified in drm_bridge_timings (legacy) as well
as drm_bridge_state->input_bus_cfg.flags

The flags from the timings will be deprecated. Bridges are supposed
to validate and set the bridge state flags from atomic_check.

Signed-off-by: Nikhil Devshatwar <nikhil.nd@ti.com>
[a-bhatia1: replace timings in cdns_mhdp_platform_info by input_bus_flags]
Signed-off-by: Aradhya Bhatia <a-bhatia1@ti.com>
---

Notes:

    changes from v5:
    * removed the wrongly addded return statement in tfp410 driver.
    * replaced the timings field in cdns_mhdp_platform_info by
      input_bus_flags field, in order to get rid of bridge->timings
      altogether.

 drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c  | 11 ++++++++---
 drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h  |  2 +-
 drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c |  9 ++++-----
 drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h |  2 +-
 4 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
index 623e4235c94f..a677b1267525 100644
--- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
@@ -2189,6 +2189,13 @@ static int cdns_mhdp_atomic_check(struct drm_bridge *bridge,
 		return -EINVAL;
 	}
 
+	/*
+	 * There might be flags negotiation supported in future.
+	 * Set the bus flags in atomic_check statically for now.
+	 */
+	if (mhdp->info)
+		bridge_state->input_bus_cfg.flags = *mhdp->info->input_bus_flags;
+
 	mutex_unlock(&mhdp->link_mutex);
 	return 0;
 }
@@ -2554,8 +2561,6 @@ static int cdns_mhdp_probe(struct platform_device *pdev)
 	mhdp->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID |
 			   DRM_BRIDGE_OP_HPD;
 	mhdp->bridge.type = DRM_MODE_CONNECTOR_DisplayPort;
-	if (mhdp->info)
-		mhdp->bridge.timings = mhdp->info->timings;
 
 	ret = phy_init(mhdp->phy);
 	if (ret) {
@@ -2642,7 +2647,7 @@ static const struct of_device_id mhdp_ids[] = {
 #ifdef CONFIG_DRM_CDNS_MHDP8546_J721E
 	{ .compatible = "ti,j721e-mhdp8546",
 	  .data = &(const struct cdns_mhdp_platform_info) {
-		  .timings = &mhdp_ti_j721e_bridge_timings,
+		  .input_bus_flags = &mhdp_ti_j721e_bridge_input_bus_flags,
 		  .ops = &mhdp_ti_j721e_ops,
 	  },
 	},
diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h
index bedddd510d17..bad2fc0c7306 100644
--- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h
@@ -336,7 +336,7 @@ struct cdns_mhdp_bridge_state {
 };
 
 struct cdns_mhdp_platform_info {
-	const struct drm_bridge_timings *timings;
+	const u32 *input_bus_flags;
 	const struct mhdp_platform_ops *ops;
 };
 
diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
index dfe1b59514f7..12d04be4e242 100644
--- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
@@ -71,8 +71,7 @@ const struct mhdp_platform_ops mhdp_ti_j721e_ops = {
 	.disable = cdns_mhdp_j721e_disable,
 };
 
-const struct drm_bridge_timings mhdp_ti_j721e_bridge_timings = {
-	.input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE |
-			   DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE |
-			   DRM_BUS_FLAG_DE_HIGH,
-};
+const u32
+mhdp_ti_j721e_bridge_input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE |
+				       DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE |
+				       DRM_BUS_FLAG_DE_HIGH;
diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h
index 97d20d115a24..5ddca07a4255 100644
--- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h
@@ -14,6 +14,6 @@
 struct mhdp_platform_ops;
 
 extern const struct mhdp_platform_ops mhdp_ti_j721e_ops;
-extern const struct drm_bridge_timings mhdp_ti_j721e_bridge_timings;
+extern const u32 mhdp_ti_j721e_bridge_input_bus_flags;
 
 #endif /* !CDNS_MHDP8546_J721E_H */
-- 
2.40.1
Re: [PATCH v6 4/8] drm/bridge: mhdp8546: Set input_bus_flags from atomic_check
Posted by Neil Armstrong 2 years, 9 months ago 
On 09/05/2023 11:30, Aradhya Bhatia wrote:
> From: Nikhil Devshatwar <nikhil.nd@ti.com>
> 
> input_bus_flags are specified in drm_bridge_timings (legacy) as well
> as drm_bridge_state->input_bus_cfg.flags
> 
> The flags from the timings will be deprecated. Bridges are supposed
> to validate and set the bridge state flags from atomic_check.
> 
> Signed-off-by: Nikhil Devshatwar <nikhil.nd@ti.com>
> [a-bhatia1: replace timings in cdns_mhdp_platform_info by input_bus_flags]
> Signed-off-by: Aradhya Bhatia <a-bhatia1@ti.com>
> ---
> 
> Notes:
> 
>      changes from v5:
>      * removed the wrongly addded return statement in tfp410 driver.
>      * replaced the timings field in cdns_mhdp_platform_info by
>        input_bus_flags field, in order to get rid of bridge->timings
>        altogether.
> 
>   drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c  | 11 ++++++++---
>   drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h  |  2 +-
>   drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c |  9 ++++-----
>   drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h |  2 +-
>   4 files changed, 14 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
> index 623e4235c94f..a677b1267525 100644
> --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
> +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
> @@ -2189,6 +2189,13 @@ static int cdns_mhdp_atomic_check(struct drm_bridge *bridge,
>   		return -EINVAL;
>   	}
>   
> +	/*
> +	 * There might be flags negotiation supported in future.
> +	 * Set the bus flags in atomic_check statically for now.
> +	 */
> +	if (mhdp->info)
> +		bridge_state->input_bus_cfg.flags = *mhdp->info->input_bus_flags;
> +
>   	mutex_unlock(&mhdp->link_mutex);
>   	return 0;
>   }
> @@ -2554,8 +2561,6 @@ static int cdns_mhdp_probe(struct platform_device *pdev)
>   	mhdp->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID |
>   			   DRM_BRIDGE_OP_HPD;
>   	mhdp->bridge.type = DRM_MODE_CONNECTOR_DisplayPort;
> -	if (mhdp->info)
> -		mhdp->bridge.timings = mhdp->info->timings;

Won't this cause a breakage because at this point in time bridge.timings->input_bus_flags
seems to be still used by tidss right ?

Neil

>   
>   	ret = phy_init(mhdp->phy);
>   	if (ret) {
> @@ -2642,7 +2647,7 @@ static const struct of_device_id mhdp_ids[] = {
>   #ifdef CONFIG_DRM_CDNS_MHDP8546_J721E
>   	{ .compatible = "ti,j721e-mhdp8546",
>   	  .data = &(const struct cdns_mhdp_platform_info) {
> -		  .timings = &mhdp_ti_j721e_bridge_timings,
> +		  .input_bus_flags = &mhdp_ti_j721e_bridge_input_bus_flags,
>   		  .ops = &mhdp_ti_j721e_ops,
>   	  },
>   	},
> diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h
> index bedddd510d17..bad2fc0c7306 100644
> --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h
> +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h
> @@ -336,7 +336,7 @@ struct cdns_mhdp_bridge_state {
>   };
>   
>   struct cdns_mhdp_platform_info {
> -	const struct drm_bridge_timings *timings;
> +	const u32 *input_bus_flags;
>   	const struct mhdp_platform_ops *ops;
>   };
>   
> diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
> index dfe1b59514f7..12d04be4e242 100644
> --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
> +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
> @@ -71,8 +71,7 @@ const struct mhdp_platform_ops mhdp_ti_j721e_ops = {
>   	.disable = cdns_mhdp_j721e_disable,
>   };
>   
> -const struct drm_bridge_timings mhdp_ti_j721e_bridge_timings = {
> -	.input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE |
> -			   DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE |
> -			   DRM_BUS_FLAG_DE_HIGH,
> -};
> +const u32
> +mhdp_ti_j721e_bridge_input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE |
> +				       DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE |
> +				       DRM_BUS_FLAG_DE_HIGH;
> diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h
> index 97d20d115a24..5ddca07a4255 100644
> --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h
> +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h
> @@ -14,6 +14,6 @@
>   struct mhdp_platform_ops;
>   
>   extern const struct mhdp_platform_ops mhdp_ti_j721e_ops;
> -extern const struct drm_bridge_timings mhdp_ti_j721e_bridge_timings;
> +extern const u32 mhdp_ti_j721e_bridge_input_bus_flags;
>   
>   #endif /* !CDNS_MHDP8546_J721E_H */
Re: [PATCH v6 4/8] drm/bridge: mhdp8546: Set input_bus_flags from atomic_check
Posted by Aradhya Bhatia 2 years, 9 months ago 
Hi Neil,

On 16-May-23 12:54, Neil Armstrong wrote:
> On 09/05/2023 11:30, Aradhya Bhatia wrote:
>> From: Nikhil Devshatwar <nikhil.nd@ti.com>
>>
>> input_bus_flags are specified in drm_bridge_timings (legacy) as well
>> as drm_bridge_state->input_bus_cfg.flags
>>
>> The flags from the timings will be deprecated. Bridges are supposed
>> to validate and set the bridge state flags from atomic_check.
>>
>> Signed-off-by: Nikhil Devshatwar <nikhil.nd@ti.com>
>> [a-bhatia1: replace timings in cdns_mhdp_platform_info by
>> input_bus_flags]
>> Signed-off-by: Aradhya Bhatia <a-bhatia1@ti.com>
>> ---
>>
>> Notes:
>>
>>      changes from v5:
>>      * removed the wrongly addded return statement in tfp410 driver.
>>      * replaced the timings field in cdns_mhdp_platform_info by
>>        input_bus_flags field, in order to get rid of bridge->timings
>>        altogether.
>>
>>   drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c  | 11 ++++++++---
>>   drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h  |  2 +-
>>   drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c |  9 ++++-----
>>   drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h |  2 +-
>>   4 files changed, 14 insertions(+), 10 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
>> b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
>> index 623e4235c94f..a677b1267525 100644
>> --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
>> +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
>> @@ -2189,6 +2189,13 @@ static int cdns_mhdp_atomic_check(struct
>> drm_bridge *bridge,
>>           return -EINVAL;
>>       }
>>   +    /*
>> +     * There might be flags negotiation supported in future.
>> +     * Set the bus flags in atomic_check statically for now.
>> +     */
>> +    if (mhdp->info)
>> +        bridge_state->input_bus_cfg.flags =
>> *mhdp->info->input_bus_flags;
>> +
>>       mutex_unlock(&mhdp->link_mutex);
>>       return 0;
>>   }
>> @@ -2554,8 +2561,6 @@ static int cdns_mhdp_probe(struct
>> platform_device *pdev)
>>       mhdp->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID |
>>                  DRM_BRIDGE_OP_HPD;
>>       mhdp->bridge.type = DRM_MODE_CONNECTOR_DisplayPort;
>> -    if (mhdp->info)
>> -        mhdp->bridge.timings = mhdp->info->timings;
> 
> Won't this cause a breakage because at this point in time
> bridge.timings->input_bus_flags
> seems to be still used by tidss right ?
> 

tidss was using the bridge.timings->input_bus_flags before the 7th
patch[1] in this series.

After the patch, it only relies on bridge_state and display_info for bus
flags and formats.


Regards
Aradhya

[1]: https://lore.kernel.org/all/20230509093036.3303-8-a-bhatia1@ti.com/


> 
>>         ret = phy_init(mhdp->phy);
>>       if (ret) {
>> @@ -2642,7 +2647,7 @@ static const struct of_device_id mhdp_ids[] = {
>>   #ifdef CONFIG_DRM_CDNS_MHDP8546_J721E
>>       { .compatible = "ti,j721e-mhdp8546",
>>         .data = &(const struct cdns_mhdp_platform_info) {
>> -          .timings = &mhdp_ti_j721e_bridge_timings,
>> +          .input_bus_flags = &mhdp_ti_j721e_bridge_input_bus_flags,
>>             .ops = &mhdp_ti_j721e_ops,
>>         },
>>       },
>> diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h
>> b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h
>> index bedddd510d17..bad2fc0c7306 100644
>> --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h
>> +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h
>> @@ -336,7 +336,7 @@ struct cdns_mhdp_bridge_state {
>>   };
>>     struct cdns_mhdp_platform_info {
>> -    const struct drm_bridge_timings *timings;
>> +    const u32 *input_bus_flags;
>>       const struct mhdp_platform_ops *ops;
>>   };
>>   diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
>> b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
>> index dfe1b59514f7..12d04be4e242 100644
>> --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
>> +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
>> @@ -71,8 +71,7 @@ const struct mhdp_platform_ops mhdp_ti_j721e_ops = {
>>       .disable = cdns_mhdp_j721e_disable,
>>   };
>>   -const struct drm_bridge_timings mhdp_ti_j721e_bridge_timings = {
>> -    .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE |
>> -               DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE |
>> -               DRM_BUS_FLAG_DE_HIGH,
>> -};
>> +const u32
>> +mhdp_ti_j721e_bridge_input_bus_flags =
>> DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE |
>> +                       DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE |
>> +                       DRM_BUS_FLAG_DE_HIGH;
>> diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h
>> b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h
>> index 97d20d115a24..5ddca07a4255 100644
>> --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h
>> +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h
>> @@ -14,6 +14,6 @@
>>   struct mhdp_platform_ops;
>>     extern const struct mhdp_platform_ops mhdp_ti_j721e_ops;
>> -extern const struct drm_bridge_timings mhdp_ti_j721e_bridge_timings;
>> +extern const u32 mhdp_ti_j721e_bridge_input_bus_flags;
>>     #endif /* !CDNS_MHDP8546_J721E_H */
>
Re: [PATCH v6 4/8] drm/bridge: mhdp8546: Set input_bus_flags from atomic_check
Posted by neil.armstrong@linaro.org 2 years, 8 months ago 
On 17/05/2023 07:48, Aradhya Bhatia wrote:
> Hi Neil,
> 
> On 16-May-23 12:54, Neil Armstrong wrote:
>> On 09/05/2023 11:30, Aradhya Bhatia wrote:
>>> From: Nikhil Devshatwar <nikhil.nd@ti.com>
>>>
>>> input_bus_flags are specified in drm_bridge_timings (legacy) as well
>>> as drm_bridge_state->input_bus_cfg.flags
>>>
>>> The flags from the timings will be deprecated. Bridges are supposed
>>> to validate and set the bridge state flags from atomic_check.
>>>
>>> Signed-off-by: Nikhil Devshatwar <nikhil.nd@ti.com>
>>> [a-bhatia1: replace timings in cdns_mhdp_platform_info by
>>> input_bus_flags]
>>> Signed-off-by: Aradhya Bhatia <a-bhatia1@ti.com>
>>> ---
>>>
>>> Notes:
>>>
>>>       changes from v5:
>>>       * removed the wrongly addded return statement in tfp410 driver.
>>>       * replaced the timings field in cdns_mhdp_platform_info by
>>>         input_bus_flags field, in order to get rid of bridge->timings
>>>         altogether.
>>>
>>>    drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c  | 11 ++++++++---
>>>    drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h  |  2 +-
>>>    drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c |  9 ++++-----
>>>    drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h |  2 +-
>>>    4 files changed, 14 insertions(+), 10 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
>>> b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
>>> index 623e4235c94f..a677b1267525 100644
>>> --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
>>> +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
>>> @@ -2189,6 +2189,13 @@ static int cdns_mhdp_atomic_check(struct
>>> drm_bridge *bridge,
>>>            return -EINVAL;
>>>        }
>>>    +    /*
>>> +     * There might be flags negotiation supported in future.
>>> +     * Set the bus flags in atomic_check statically for now.
>>> +     */
>>> +    if (mhdp->info)
>>> +        bridge_state->input_bus_cfg.flags =
>>> *mhdp->info->input_bus_flags;
>>> +
>>>        mutex_unlock(&mhdp->link_mutex);
>>>        return 0;
>>>    }
>>> @@ -2554,8 +2561,6 @@ static int cdns_mhdp_probe(struct
>>> platform_device *pdev)
>>>        mhdp->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID |
>>>                   DRM_BRIDGE_OP_HPD;
>>>        mhdp->bridge.type = DRM_MODE_CONNECTOR_DisplayPort;
>>> -    if (mhdp->info)
>>> -        mhdp->bridge.timings = mhdp->info->timings;
>>
>> Won't this cause a breakage because at this point in time
>> bridge.timings->input_bus_flags
>> seems to be still used by tidss right ?
>>
> 
> tidss was using the bridge.timings->input_bus_flags before the 7th
> patch[1] in this series.
> 
> After the patch, it only relies on bridge_state and display_info for bus
> flags and formats.

OK thanks, then:

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>

if you resend a new version, please add this info in the commit message.

Neil

> 
> 
> Regards
> Aradhya
> 
> [1]: https://lore.kernel.org/all/20230509093036.3303-8-a-bhatia1@ti.com/
> 
> 
>>
>>>          ret = phy_init(mhdp->phy);
>>>        if (ret) {
>>> @@ -2642,7 +2647,7 @@ static const struct of_device_id mhdp_ids[] = {
>>>    #ifdef CONFIG_DRM_CDNS_MHDP8546_J721E
>>>        { .compatible = "ti,j721e-mhdp8546",
>>>          .data = &(const struct cdns_mhdp_platform_info) {
>>> -          .timings = &mhdp_ti_j721e_bridge_timings,
>>> +          .input_bus_flags = &mhdp_ti_j721e_bridge_input_bus_flags,
>>>              .ops = &mhdp_ti_j721e_ops,
>>>          },
>>>        },
>>> diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h
>>> b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h
>>> index bedddd510d17..bad2fc0c7306 100644
>>> --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h
>>> +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h
>>> @@ -336,7 +336,7 @@ struct cdns_mhdp_bridge_state {
>>>    };
>>>      struct cdns_mhdp_platform_info {
>>> -    const struct drm_bridge_timings *timings;
>>> +    const u32 *input_bus_flags;
>>>        const struct mhdp_platform_ops *ops;
>>>    };
>>>    diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
>>> b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
>>> index dfe1b59514f7..12d04be4e242 100644
>>> --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
>>> +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
>>> @@ -71,8 +71,7 @@ const struct mhdp_platform_ops mhdp_ti_j721e_ops = {
>>>        .disable = cdns_mhdp_j721e_disable,
>>>    };
>>>    -const struct drm_bridge_timings mhdp_ti_j721e_bridge_timings = {
>>> -    .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE |
>>> -               DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE |
>>> -               DRM_BUS_FLAG_DE_HIGH,
>>> -};
>>> +const u32
>>> +mhdp_ti_j721e_bridge_input_bus_flags =
>>> DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE |
>>> +                       DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE |
>>> +                       DRM_BUS_FLAG_DE_HIGH;
>>> diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h
>>> b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h
>>> index 97d20d115a24..5ddca07a4255 100644
>>> --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h
>>> +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h
>>> @@ -14,6 +14,6 @@
>>>    struct mhdp_platform_ops;
>>>      extern const struct mhdp_platform_ops mhdp_ti_j721e_ops;
>>> -extern const struct drm_bridge_timings mhdp_ti_j721e_bridge_timings;
>>> +extern const u32 mhdp_ti_j721e_bridge_input_bus_flags;
>>>      #endif /* !CDNS_MHDP8546_J721E_H */
>>
Re: [PATCH v6 4/8] drm/bridge: mhdp8546: Set input_bus_flags from atomic_check
Posted by Aradhya Bhatia 2 years, 8 months ago 
Hi Neil,

On 22-May-23 13:35, neil.armstrong@linaro.org wrote:
> On 17/05/2023 07:48, Aradhya Bhatia wrote:
>> Hi Neil,
>>
>> On 16-May-23 12:54, Neil Armstrong wrote:
>>> On 09/05/2023 11:30, Aradhya Bhatia wrote:
>>>> From: Nikhil Devshatwar <nikhil.nd@ti.com>
>>>>
>>>> input_bus_flags are specified in drm_bridge_timings (legacy) as well
>>>> as drm_bridge_state->input_bus_cfg.flags
>>>>
>>>> The flags from the timings will be deprecated. Bridges are supposed
>>>> to validate and set the bridge state flags from atomic_check.
>>>>
>>>> Signed-off-by: Nikhil Devshatwar <nikhil.nd@ti.com>
>>>> [a-bhatia1: replace timings in cdns_mhdp_platform_info by
>>>> input_bus_flags]
>>>> Signed-off-by: Aradhya Bhatia <a-bhatia1@ti.com>
>>>> ---
>>>>
>>>> Notes:
>>>>
>>>>       changes from v5:
>>>>       * removed the wrongly addded return statement in tfp410 driver.
>>>>       * replaced the timings field in cdns_mhdp_platform_info by
>>>>         input_bus_flags field, in order to get rid of bridge->timings
>>>>         altogether.
>>>>
>>>>    drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c  | 11
>>>> ++++++++---
>>>>    drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h  |  2 +-
>>>>    drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c |  9 ++++-----
>>>>    drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h |  2 +-
>>>>    4 files changed, 14 insertions(+), 10 deletions(-)
>>>>
>>>> diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
>>>> b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
>>>> index 623e4235c94f..a677b1267525 100644
>>>> --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
>>>> +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
>>>> @@ -2189,6 +2189,13 @@ static int cdns_mhdp_atomic_check(struct
>>>> drm_bridge *bridge,
>>>>            return -EINVAL;
>>>>        }
>>>>    +    /*
>>>> +     * There might be flags negotiation supported in future.
>>>> +     * Set the bus flags in atomic_check statically for now.
>>>> +     */
>>>> +    if (mhdp->info)
>>>> +        bridge_state->input_bus_cfg.flags =
>>>> *mhdp->info->input_bus_flags;
>>>> +
>>>>        mutex_unlock(&mhdp->link_mutex);
>>>>        return 0;
>>>>    }
>>>> @@ -2554,8 +2561,6 @@ static int cdns_mhdp_probe(struct
>>>> platform_device *pdev)
>>>>        mhdp->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID |
>>>>                   DRM_BRIDGE_OP_HPD;
>>>>        mhdp->bridge.type = DRM_MODE_CONNECTOR_DisplayPort;
>>>> -    if (mhdp->info)
>>>> -        mhdp->bridge.timings = mhdp->info->timings;
>>>
>>> Won't this cause a breakage because at this point in time
>>> bridge.timings->input_bus_flags
>>> seems to be still used by tidss right ?
>>>
>>
>> tidss was using the bridge.timings->input_bus_flags before the 7th
>> patch[1] in this series.
>>
>> After the patch, it only relies on bridge_state and display_info for bus
>> flags and formats.
> 
> OK thanks, then:
> 
> Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
> 
> if you resend a new version, please add this info in the commit message.

Thank you! Will do so.

Regards
Aradhya

> 
> Neil
> 
>>
>>
>> Regards
>> Aradhya
>>
>> [1]: https://lore.kernel.org/all/20230509093036.3303-8-a-bhatia1@ti.com/
>>
>>
>>>
>>>>          ret = phy_init(mhdp->phy);
>>>>        if (ret) {
>>>> @@ -2642,7 +2647,7 @@ static const struct of_device_id mhdp_ids[] = {
>>>>    #ifdef CONFIG_DRM_CDNS_MHDP8546_J721E
>>>>        { .compatible = "ti,j721e-mhdp8546",
>>>>          .data = &(const struct cdns_mhdp_platform_info) {
>>>> -          .timings = &mhdp_ti_j721e_bridge_timings,
>>>> +          .input_bus_flags = &mhdp_ti_j721e_bridge_input_bus_flags,
>>>>              .ops = &mhdp_ti_j721e_ops,
>>>>          },
>>>>        },
>>>> diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h
>>>> b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h
>>>> index bedddd510d17..bad2fc0c7306 100644
>>>> --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h
>>>> +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h
>>>> @@ -336,7 +336,7 @@ struct cdns_mhdp_bridge_state {
>>>>    };
>>>>      struct cdns_mhdp_platform_info {
>>>> -    const struct drm_bridge_timings *timings;
>>>> +    const u32 *input_bus_flags;
>>>>        const struct mhdp_platform_ops *ops;
>>>>    };
>>>>    diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
>>>> b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
>>>> index dfe1b59514f7..12d04be4e242 100644
>>>> --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
>>>> +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
>>>> @@ -71,8 +71,7 @@ const struct mhdp_platform_ops mhdp_ti_j721e_ops = {
>>>>        .disable = cdns_mhdp_j721e_disable,
>>>>    };
>>>>    -const struct drm_bridge_timings mhdp_ti_j721e_bridge_timings = {
>>>> -    .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE |
>>>> -               DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE |
>>>> -               DRM_BUS_FLAG_DE_HIGH,
>>>> -};
>>>> +const u32
>>>> +mhdp_ti_j721e_bridge_input_bus_flags =
>>>> DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE |
>>>> +                       DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE |
>>>> +                       DRM_BUS_FLAG_DE_HIGH;
>>>> diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h
>>>> b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h
>>>> index 97d20d115a24..5ddca07a4255 100644
>>>> --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h
>>>> +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h
>>>> @@ -14,6 +14,6 @@
>>>>    struct mhdp_platform_ops;
>>>>      extern const struct mhdp_platform_ops mhdp_ti_j721e_ops;
>>>> -extern const struct drm_bridge_timings mhdp_ti_j721e_bridge_timings;
>>>> +extern const u32 mhdp_ti_j721e_bridge_input_bus_flags;
>>>>      #endif /* !CDNS_MHDP8546_J721E_H */
>>>
>

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