diff options
| author | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2015-04-10 20:15:09 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-04-14 19:15:17 +0200 |
| commit | 89251b177b588adf5e62df42d51017d24047f44b (patch) | |
| tree | ca68e1ef9655f1eb8631050ab7471f7fd49a85c4 /drivers/gpu/drm/i915/i915_debugfs.c | |
| parent | drm/i915: PSR: Fix DP_PSR_NO_TRAIN_ON_EXIT logic (diff) | |
| download | linux-89251b177b588adf5e62df42d51017d24047f44b.tar.xz linux-89251b177b588adf5e62df42d51017d24047f44b.zip | |
drm/i915: PSR: deprecate link_standby support for core platforms.
On Haswell and Broadwell with link in standby when exit event happens
between vblank and VSC packet, PSR exit on panel but DPA transmitter
still sends black pixel. When this condition hits, panel will intermittently
display black frame.
The known W/A for this case involve the of single_frame update
that isn't supported on Haswell and to be supported on Broadwell
3 other workarounds would be required. So it is better and safe to
just deprecate link_standby for now.
Also, link fully off saves more power than link_standby and afwk
no OEM is requesting link standby on VBT. There is no reason for that.
For Skylake let's just consider it behaves like Broadwell until
we prove otherwise.
v2: Fix commit message (Durga).
v3: Fix conflict with PSR2.
Reference: HSD: bdwgfx/1912559
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Durgadoss R <durgadoss.r@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_debugfs.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_debugfs.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 23949247cf10..07a71c0ff775 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -2358,9 +2358,6 @@ static int i915_edp_psr_status(struct seq_file *m, void *data) } seq_puts(m, "\n"); - seq_printf(m, "Link standby: %s\n", - yesno((bool)dev_priv->psr.link_standby)); - /* CHV PSR has no kind of performance counter */ if (HAS_DDI(dev)) { psrperf = I915_READ(EDP_PSR_PERF_CNT(dev)) & |