On Tue, May 08, 2018 at 05:35:24PM -0700, Dhinakaran Pandiyan wrote:
> Driver features data block has a boolean flag for PSR, use this to decide
> whether PSR should be enabled on a platform. The module parameter can
> still be used to override this.
>
> Note: The feature currently remains disabled by default for all platforms
> irrespective of what VBT says.
>
> Cc: Rodrigo Vivi <rodrigo.v...@intel.com>
> Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandi...@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.v...@intel.com>
> ---
> drivers/gpu/drm/i915/i915_drv.h | 1 +
> drivers/gpu/drm/i915/intel_bios.c | 1 +
> drivers/gpu/drm/i915/intel_psr.c | 7 +++++--
> 3 files changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 04e27806e581..24c5e4765afd 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -1073,6 +1073,7 @@ struct intel_vbt_data {
> } edp;
>
> struct {
> + bool enable;
> bool full_link;
> bool require_aux_wakeup;
> int idle_frames;
> diff --git a/drivers/gpu/drm/i915/intel_bios.c
> b/drivers/gpu/drm/i915/intel_bios.c
> index 702d3fab97fc..54270bdde100 100644
> --- a/drivers/gpu/drm/i915/intel_bios.c
> +++ b/drivers/gpu/drm/i915/intel_bios.c
> @@ -530,6 +530,7 @@ parse_driver_features(struct drm_i915_private *dev_priv,
> */
> if (!driver->drrs_enabled)
> dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
> + dev_priv->vbt.psr.enable = driver->psr_enabled;
> }
>
> static void
> diff --git a/drivers/gpu/drm/i915/intel_psr.c
> b/drivers/gpu/drm/i915/intel_psr.c
> index 6233a322aac5..db27f2faa1de 100644
> --- a/drivers/gpu/drm/i915/intel_psr.c
> +++ b/drivers/gpu/drm/i915/intel_psr.c
> @@ -1173,9 +1173,12 @@ void intel_psr_init(struct drm_i915_private *dev_priv)
> if (!dev_priv->psr.sink_support)
> return;
>
> - /* Per platform default: all disabled. */
> - if (i915_modparams.enable_psr == -1)
> + 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;
> + }
>
> /* Set link_standby x link_off defaults */
> if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
> --
> 2.14.1
>
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