[Intel-gfx] [PATCH] drm/i915: Apply headless DMC workaround for CNL

[Imre Deak]

On Thu, Jan 11, 2018 at 08:24:17AM +0000, Tvrtko Ursulin wrote:
> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> 
> With firmware 1.07 having fixed the state corruption issue, we can enable
> the headless GT performance workaround for CNL as well. (Equivalent to
> b68763741aa2 ("drm/i915: Restore GT performance in headless mode with DMC
> loaded") on other affected platforms.)
> 
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100572
> Testcase: igt/gem_exec_nop/headless
> Cc: Imre Deak <imre.deak at intel.com>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Dmitry Rogozhkin <dmitry.v.rogozhkin at intel.com>

Reviewed-by: Imre Deak <imre.deak at intel.com>

> ---
>  drivers/gpu/drm/i915/intel_runtime_pm.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
> index d758da6156a8..4996c4ea8a80 100644
> --- a/drivers/gpu/drm/i915/intel_runtime_pm.c
> +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
> @@ -1848,6 +1848,7 @@ void intel_display_power_put(struct drm_i915_private *dev_priv,
>  	BIT_ULL(POWER_DOMAIN_INIT))
>  #define CNL_DISPLAY_DC_OFF_POWER_DOMAINS (		\
>  	CNL_DISPLAY_POWERWELL_2_POWER_DOMAINS |		\
> +	BIT_ULL(POWER_DOMAIN_GT_IRQ) |			\
>  	BIT_ULL(POWER_DOMAIN_MODESET) |			\
>  	BIT_ULL(POWER_DOMAIN_AUX_A) |			\
>  	BIT_ULL(POWER_DOMAIN_INIT))
> -- 
> 2.14.1
>