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| author |   José Roberto de Souza <jose.souza@intel.com> | 2019-03-14 16:01:13 -0700 |
|---|---|---|
| committer | José Roberto de Souza <jose.souza@intel.com> | 2019-03-19 12:37:43 -0700 |
| commit | 06dd94cccdd142423fa5ce9f5c3ea0274ca84709 (patch) | |
| tree | 9c67aaeb117fca5509193fb339efacdbb411c329 /drivers/gpu/drm/i915/intel_psr.c | |
| parent | drm/i915: Pass dev_priv to intel_is_dual_link_lvds() (diff) | |
| download | linux-dev-06dd94cccdd142423fa5ce9f5c3ea0274ca84709.tar.xz linux-dev-06dd94cccdd142423fa5ce9f5c3ea0274ca84709.zip | |
drm/i915: Fix PSR2 selective update corruption after PSR1 setup
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@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190314230113.6571-1-jose.souza@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_psr.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_psr.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c index 29aa0e90cc0c..605fe8fc85cc 100644 --- a/drivers/gpu/drm/i915/intel_psr.c +++ b/drivers/gpu/drm/i915/intel_psr.c @@ -530,6 +530,14 @@ 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); } |