There is probably a issue in DMC firmwares(icl_dmc_ver1_07.bin and kbl_dmc_ver1_04.bin at least) that causes PSR2 SU to fail after exiting DC6 if EDP_PSR_TP1_TP3_SEL is kept in PSR_CTL, so for now lets workaround the issue by cleaning PSR_CTL before enable PSR2. v2: - Updated commit description and comment to state that it may be a DMC firmware issue (Rodrigo) - No need to RMW, let's write 0 to PSR_CTL(Dhinakaran) Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx> Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> Signed-off-by: José Roberto de Souza <jose.souza@xxxxxxxxx> --- drivers/gpu/drm/i915/intel_psr.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c index 7d570a45fc17..10bf70e521b6 100644 --- a/drivers/gpu/drm/i915/intel_psr.c +++ b/drivers/gpu/drm/i915/intel_psr.c @@ -531,6 +531,14 @@ static void hsw_activate_psr2(struct intel_dp *intel_dp) else val |= EDP_PSR2_TP2_TIME_2500us; + /* + * FIXME: There is probably a issue in DMC firmwares(icl_dmc_ver1_07.bin + * and kbl_dmc_ver1_04.bin at least) that causes PSR2 SU to fail after + * exiting DC6 if EDP_PSR_TP1_TP3_SEL is kept in PSR_CTL, so for now + * lets workaround the issue by cleaning PSR_CTL before enable PSR2. + */ + I915_WRITE(EDP_PSR_CTL, 0); + I915_WRITE(EDP_PSR2_CTL, val); } -- 2.21.0 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
