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drm/i915: Mask LPSP to get PSR working even with Power Well in use by…
… audio. Power Well in use forces constantly PSR to exit. On recent Kernel I noticed that PSR Performance Counter was always 0 indicating that PSR was never really achieved. By masking LPSP, PSR can work normally and save power on Haswell. Two bugs had been raised with PSR flag enabled: - "Screen flickers when booted by enabling PSR in the kernel (i915.enable_psr=1) , the system is booting to a gray screen." - "When booting the DUT with PSR feature enabled in the kernel (i915.enable_psr=1) , the system is booting to a gray screen." Both bugs has been fixed by this patch. v2: proper comment for -fixes Tested-by: Selvaraj, Elavarasan <[email protected]> Signed-off-by: Rodrigo Vivi <[email protected]> Cc: [email protected] Signed-off-by: Daniel Vetter <[email protected]>
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