On Thu, 2018-09-27 at 23:11 -0700, Dhinakaran Pandiyan wrote:
> We have new tests and fixes in place since the feature was last
> disabled. Try again for gen-9+ hardware and enable only PSR1 by
> default as
> a first step.
> v2: Remove typo fix and comment improvements (Rodrigo)
Reviewed-by: José Roberto de Souza <jose.souza@xxxxxxxxx>
Tested-by: José Roberto de Souza <jose.souza@xxxxxxxxx>
It works without any glitches in all the 3 gen9+ machines that I
tested.
>
> Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
> Cc: Jose Roberto de Souza <jose.souza@xxxxxxxxx>
> Cc: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
> Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
> Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> References: commit 2ee7dc497e34 ("drm/i915: disable PSR by default on
> HSW/BDW")
> References: commit dcb2e993f3c0 ("Revert "drm/i915: Enable PSR by
> default on Valleyview and Cherryview."")
> Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/intel_psr.c | 13 +++++++------
> 1 file changed, 7 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_psr.c
> b/drivers/gpu/drm/i915/intel_psr.c
> index b6838b525502..5a2660ad8203 100644
> --- a/drivers/gpu/drm/i915/intel_psr.c
> +++ b/drivers/gpu/drm/i915/intel_psr.c
> @@ -71,6 +71,10 @@ static bool psr_global_enabled(u32 debug)
> static bool intel_psr2_enabled(struct drm_i915_private *dev_priv,
> const struct intel_crtc_state
> *crtc_state)
> {
> + /* Disable PSR2 by default for all platforms */
> + if (i915_modparams.enable_psr == -1)
> + return false;
> +
> switch (dev_priv->psr.debug & I915_PSR_DEBUG_MODE_MASK) {
> case I915_PSR_DEBUG_FORCE_PSR1:
> return false;
> @@ -1065,12 +1069,9 @@ void intel_psr_init(struct drm_i915_private
> *dev_priv)
> if (!dev_priv->psr.sink_support)
> return;
>
> - if (i915_modparams.enable_psr == -1) {
> - i915_modparams.enable_psr = dev_priv->vbt.psr.enable;
> -
> - /* Per platform default: all disabled. */
> - i915_modparams.enable_psr = 0;
> - }
> + if (i915_modparams.enable_psr == -1)
> + if (INTEL_GEN(dev_priv) < 9 || !dev_priv-
> >vbt.psr.enable)
> + i915_modparams.enable_psr = 0;
>
> /* Set link_standby x link_off defaults */
> if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
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