On Tue, 2018-12-04 at 15:00 -0800, José Roberto de Souza wrote:
> PSR2 only trigger interruptions for AUX error, so let's not print
> useless information in debugsfs.
> Also adding a comment to intel_psr_irq_handler() about that.
The code still allows the enabling of interrupt debugging for PSR2. Fix
that to reject debugfs writes?
>
> Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
> Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
> Signed-off-by: José Roberto de Souza <jose.souza@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_debugfs.c | 2 +-
> drivers/gpu/drm/i915/intel_psr.c | 1 +
> 2 files changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c
> b/drivers/gpu/drm/i915/i915_debugfs.c
> index 86303ba02666..505d93b31eb6 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -2760,7 +2760,7 @@ static int i915_edp_psr_status(struct seq_file
> *m, void *data)
> seq_printf(m, "Performance counter: %u\n", val);
> }
>
> - if (psr->debug & I915_PSR_DEBUG_IRQ) {
> + if ((psr->debug & I915_PSR_DEBUG_IRQ) && !psr->psr2_enabled) {
> seq_printf(m, "Last attempted entry at: %lld\n",
> psr->last_entry_attempt);
> seq_printf(m, "Last exit at: %lld\n", psr->last_exit);
> diff --git a/drivers/gpu/drm/i915/intel_psr.c
> b/drivers/gpu/drm/i915/intel_psr.c
> index 15a2121aa64f..85349a57689c 100644
> --- a/drivers/gpu/drm/i915/intel_psr.c
> +++ b/drivers/gpu/drm/i915/intel_psr.c
> @@ -203,6 +203,7 @@ void intel_psr_irq_handler(struct
> drm_i915_private *dev_priv, u32 psr_iir)
> mask |= EDP_PSR_ERROR(shift);
> }
>
> + /* PSR2 don't trigger PRE_ENTRY and POST_EXIT
> interruptions */
> if (psr_iir & EDP_PSR_PRE_ENTRY(shift)) {
> dev_priv->psr.last_entry_attempt = time_ns;
> DRM_DEBUG_KMS("[transcoder %s] PSR entry
> attempt in 2 vblanks\n",
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