[Intel-gfx] [PATCH] drm/i915/psr : Add psr1 live status

[Dhinakaran Pandiyan]

On Fri, 2018-05-25 at 11:50 +0530, vathsala nagaraju wrote:
> From: Vathsala Nagaraju <vathsala.nagaraju at intel.com>
> 
> Prints live state of psr1.Extending the existing
> PSR2 live state function to cover psr1.
> 
> Tested on KBL with psr2 and psr1 panel.
> 
> v2: rebase
> v3: DK
>     Rename psr2_live_status to psr_source_status.
> v4: DK
>     Move EDP_PSR_STATUS_STATE_SHIFT below EDP_PSR_STATUS_STATE_MASK.
>     Pass seq to psr_source_status, handle source status prints in
>     psr_source_status.
> v5: Fixed CI warning messages
> 
> Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
> Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
> 

nit: Noticed an extra space in the title before the colon.
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>

> Signed-off-by: Vathsala Nagaraju <vathsala.nagaraju at intel.com>
> ---
>  drivers/gpu/drm/i915/i915_debugfs.c | 72 ++++++++++++++++++++++++---
> ----------
>  drivers/gpu/drm/i915/i915_reg.h     |  1 +
>  2 files changed, 49 insertions(+), 24 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c
> b/drivers/gpu/drm/i915/i915_debugfs.c
> index 5251544..1d45cb9 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -2596,27 +2596,55 @@ static int i915_guc_log_relay_release(struct
> inode *inode, struct file *file)
>  	.release = i915_guc_log_relay_release,
>  };
>  
> -static const char *psr2_live_status(u32 val)
> -{
> -	static const char * const live_status[] = {
> -		"IDLE",
> -		"CAPTURE",
> -		"CAPTURE_FS",
> -		"SLEEP",
> -		"BUFON_FW",
> -		"ML_UP",
> -		"SU_STANDBY",
> -		"FAST_SLEEP",
> -		"DEEP_SLEEP",
> -		"BUF_ON",
> -		"TG_ON"
> -	};
> +static void
> +psr_source_status(struct drm_i915_private *dev_priv, struct seq_file
> *m)
> +{
> +	u32 val, psr_status = 0;
>  
> -	val = (val & EDP_PSR2_STATUS_STATE_MASK) >>
> EDP_PSR2_STATUS_STATE_SHIFT;
> -	if (val < ARRAY_SIZE(live_status))
> -		return live_status[val];
> +	if (dev_priv->psr.psr2_enabled) {
> +		static const char * const live_status[] = {
> +			"IDLE",
> +			"CAPTURE",
> +			"CAPTURE_FS",
> +			"SLEEP",
> +			"BUFON_FW",
> +			"ML_UP",
> +			"SU_STANDBY",
> +			"FAST_SLEEP",
> +			"DEEP_SLEEP",
> +			"BUF_ON",
> +			"TG_ON"
> +		};
> +		psr_status = I915_READ(EDP_PSR2_STATUS);
> +		val =  (psr_status & EDP_PSR2_STATUS_STATE_MASK) >>
> +			EDP_PSR2_STATUS_STATE_SHIFT;
> +		if (val < ARRAY_SIZE(live_status)) {
> +			seq_printf(m, "Source PSR status: %x[%s]\n",
> psr_status,
> +				   live_status[val]);
> +			return;
> +		}
> +	} else {
> +		static const char * const live_status[] = {
> +			"IDLE",
> +			"SRDONACK",
> +			"SRDENT",
> +			"BUFOFF",
> +			"BUFON",
> +			"AUXACK",
> +			"SRDOFFACK",
> +			"SRDENT_ON",
> +		};
> +		psr_status = I915_READ(EDP_PSR_STATUS);
> +		val = (psr_status & EDP_PSR_STATUS_STATE_MASK) >>
> +			EDP_PSR_STATUS_STATE_SHIFT;
			^alignment is different from the PSR2 block.