[Bug 76345] [Bisected BDW drm-intel-fixes] Enable PSR feature by insert kernel parameter "i915.enable_psr=1", will cause x fail to start

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76345

--- Comment #10 from wendy.wang at intel.com ---
Hi Rodrigo,
Can you educate me why apply below patch, this issue can be fixed on my
previous failed BDW SUT?

> Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
> ---
>  drivers/gpu/drm/i915/intel_dp.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 6f767e5..89d5b41 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -1608,7 +1608,7 @@ static void intel_edp_psr_enable_source(struct intel_dp *intel_dp)
>  	struct drm_device *dev = intel_dp_to_dev(intel_dp);
>  	struct drm_i915_private *dev_priv = dev->dev_private;
>  	uint32_t max_sleep_time = 0x1f;
> -	uint32_t idle_frames = 1;
> +	uint32_t idle_frames = 0xf;
>  	uint32_t val = 0x0;
>  	const uint32_t link_entry_time = EDP_PSR_MIN_LINK_ENTRY_TIME_8_LINES;
>  
> --
> 1.9.1
>

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