Re: [PATCH 3/4] drm/i915: Save sink_count for tracking changes to it

[Jani Nikula <jani.nikula@linux.intel.com>]

On Thu, 27 Aug 2015, Sivakumar Thulasimani <sivakumar.thulasimani@intel.com> wrote:
> From: "Thulasimani,Sivakumar" <sivakumar.thulasimani@intel.com>
>
> sink count can change between short pulse hpd hence this patch
> adds a member variable to intel_dp so we can track any changes
> between short pulse interrupts.
>
> Signed-off-by: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>

Provided the earlier patch gets a proper explanation,

Reviewed-by: Jani Nikula <jani.nikula@intel.com>


> ---
>  drivers/gpu/drm/i915/intel_dp.c  |    5 ++---
>  drivers/gpu/drm/i915/intel_drv.h |    1 +
>  2 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 9e4e27d..834f513 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -3898,7 +3898,6 @@ intel_dp_get_dpcd(struct intel_dp *intel_dp)
>  	struct drm_device *dev = dig_port->base.base.dev;
>  	struct drm_i915_private *dev_priv = dev->dev_private;
>  	uint8_t rev;
> -	uint8_t reg;
>  
>  	if (intel_dp_dpcd_read_wake(&intel_dp->aux, 0x000, intel_dp->dpcd,
>  				    sizeof(intel_dp->dpcd)) < 0)
> @@ -3910,10 +3909,10 @@ intel_dp_get_dpcd(struct intel_dp *intel_dp)
>  		return false; /* DPCD not present */
>  
>  	if (intel_dp_dpcd_read_wake(&intel_dp->aux, DP_SINK_COUNT,
> -					    &reg, 1) < 0)
> +					    &intel_dp->sink_count, 1) < 0)
>  			return false;
>  
> -	if (!DP_GET_SINK_COUNT(reg))
> +	if (!DP_GET_SINK_COUNT(intel_dp->sink_count))
>  		return false;
>  
>  	/* Check if the panel supports PSR */
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index 81b7d77..8aca5bb 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -712,6 +712,7 @@ struct intel_dp {
>  	enum hdmi_force_audio force_audio;
>  	bool limited_color_range;
>  	bool color_range_auto;
> +	uint8_t sink_count;
>  	uint8_t dpcd[DP_RECEIVER_CAP_SIZE];
>  	uint8_t psr_dpcd[EDP_PSR_RECEIVER_CAP_SIZE];
>  	uint8_t downstream_ports[DP_MAX_DOWNSTREAM_PORTS];
> -- 
> 1.7.9.5
>

-- 
Jani Nikula, Intel Open Source Technology Center
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