[Intel-gfx] [PATCH v5 2/2] drm/i915/display: Support Multiple Transcoders' PSR status on debugfs

[Jani Nikula]

On Mon, 14 Dec 2020, Anshuman Gupta <anshuman.gupta at intel.com> wrote:
> On 2020-12-11 at 19:14:21 +0200, Gwan-gyeong Mun wrote:
>> In order to support the PSR state of each transcoder, it adds
>> i915_psr_status to sub-directory of each transcoder.
>> 
>> v2: Change using of Symbolic permissions 'S_IRUGO' to using of octal
>>     permissions '0444'
>> v5: Addressed JJani Nikula's review comments
>>  - Remove checking of Gen12 for i915_psr_status.
>>  - Add check of HAS_PSR()
>>  - Remove meaningless check routine.
>> 
>> Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun at intel.com>
>> Cc: José Roberto de Souza <jose.souza at intel.com>
>> Cc: Jani Nikula <jani.nikula at intel.com>
>> Cc: Anshuman Gupta <anshuman.gupta at intel.com>
>> ---
>>  .../gpu/drm/i915/display/intel_display_debugfs.c | 16 ++++++++++++++++
>>  1 file changed, 16 insertions(+)
>> 
>> diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
>> index 041053167d7f..d2dd61c4ee0b 100644
>> --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
>> +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
>> @@ -2224,6 +2224,16 @@ static int i915_hdcp_sink_capability_show(struct seq_file *m, void *data)
>>  }
>>  DEFINE_SHOW_ATTRIBUTE(i915_hdcp_sink_capability);
>>  
>> +static int i915_psr_status_show(struct seq_file *m, void *data)
>> +{
>> +	struct drm_connector *connector = m->private;
>> +	struct intel_dp *intel_dp =
>> +		intel_attached_dp(to_intel_connector(connector));
>> +
>> +	return intel_psr_status(m, intel_dp);
>> +}
>> +DEFINE_SHOW_ATTRIBUTE(i915_psr_status);
>> +
>>  #define LPSP_CAPABLE(COND) (COND ? seq_puts(m, "LPSP: capable\n") : \
>>  				seq_puts(m, "LPSP: incapable\n"))
>>  
>> @@ -2399,6 +2409,12 @@ int intel_connector_debugfs_add(struct drm_connector *connector)
>>  				    connector, &i915_psr_sink_status_fops);
>>  	}
>>  
>> +	if (HAS_PSR(dev_priv) &&
>> +	    connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
>> +		debugfs_create_file("i915_psr_status", 0444, root,
> Could we keep the file name as i915_edp_psr_status, as we have today?
> with that addressed.

Depends on whether the plan is to use the same file for regular DP panel
replay in the future. Then edp would be misleading.

BR,
Jani.

> Reviewed-by: Anshuman Gupta <anshuman.gupta at intel.com>
>> +				    connector, &i915_psr_status_fops);
>> +	}
>> +
>>  	if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
>>  	    connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
>>  	    connector->connector_type == DRM_MODE_CONNECTOR_HDMIB) {
>> -- 
>> 2.25.0
>> 

-- 
Jani Nikula, Intel Open Source Graphics Center