[Intel-gfx] [PATCH] drm/i915: Enable PSR by default.

[Daniel Vetter]

On Wed, Dec 02, 2015 at 08:08:30AM -0800, Rodrigo Vivi wrote:
> With a reliable frontbuffer tracking and all instability corner cases
> solved let's re-enabled PSR by default on all supported platforms.
> 
> Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>

Hm, one thing we're missing here still I think is that right now there's
not yet a BAT for psr. At least I didn't spot anything in the CI overview.
Is there a super-basic PSR testcase (just checking that we go into psr
self-refresh is imo good enough), similar to what we have with runtime PM?

Also I guess we need to get the dp aux series from you in first. With BAT
and outstanding series merged:

Acked-by: Daniel Vetter <daniel.vetter at ffwll.ch>

Awesome work!

Cheers, Daniel
> ---
>  drivers/gpu/drm/i915/i915_params.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c
> index 835d609..461c326 100644
> --- a/drivers/gpu/drm/i915/i915_params.c
> +++ b/drivers/gpu/drm/i915/i915_params.c
> @@ -37,7 +37,7 @@ struct i915_params i915 __read_mostly = {
>  	.enable_execlists = -1,
>  	.enable_hangcheck = true,
>  	.enable_ppgtt = -1,
> -	.enable_psr = 0,
> +	.enable_psr = 1,
>  	.preliminary_hw_support = IS_ENABLED(CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT),
>  	.disable_power_well = -1,
>  	.enable_ips = 1,
> @@ -126,7 +126,7 @@ MODULE_PARM_DESC(enable_execlists,
>  	"(-1=auto [default], 0=disabled, 1=enabled)");
>  
>  module_param_named_unsafe(enable_psr, i915.enable_psr, int, 0600);
> -MODULE_PARM_DESC(enable_psr, "Enable PSR (default: false)");
> +MODULE_PARM_DESC(enable_psr, "Enable PSR (default: true)");
>  
>  module_param_named_unsafe(preliminary_hw_support, i915.preliminary_hw_support, int, 0600);
>  MODULE_PARM_DESC(preliminary_hw_support,
> -- 
> 2.4.3
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch