On Tue, Nov 12, 2019 at 09:16:57AM -0800, Matt Roper wrote:
On Tue, Nov 05, 2019 at 05:45:00PM -0800, José Roberto de Souza wrote:
PSR2 HW only support a limited number of bits per pixel, if mode has
more than supported PSR2 should not be enabled.
BSpec: 50422
BSpec: 7713
Cc: Gwan-gyeong Mun <gwan-gyeong.mun@xxxxxxxxx>
Signed-off-by: José Roberto de Souza <jose.souza@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_psr.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index c1d133362b76..0d84ea28bc6f 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -608,7 +608,7 @@ static bool intel_psr2_config_valid(struct intel_dp *intel_dp,
struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
int crtc_hdisplay = crtc_state->hw.adjusted_mode.crtc_hdisplay;
int crtc_vdisplay = crtc_state->hw.adjusted_mode.crtc_vdisplay;
- int psr_max_h = 0, psr_max_v = 0;
+ int psr_max_h = 0, psr_max_v = 0, max_bpp = 0;
if (!dev_priv->psr.sink_psr2_support)
return false;
@@ -632,12 +632,15 @@ static bool intel_psr2_config_valid(struct intel_dp *intel_dp,
if (INTEL_GEN(dev_priv) >= 12) {
psr_max_h = 5120;
psr_max_v = 3200;
+ max_bpp = 30;
} else if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) {
psr_max_h = 4096;
psr_max_v = 2304;
+ max_bpp = 24;
} else if (IS_GEN(dev_priv, 9)) {
psr_max_h = 3640;
psr_max_v = 2304;
+ max_bpp = 24;
}
if (crtc_hdisplay > psr_max_h || crtc_vdisplay > psr_max_v) {
@@ -647,6 +650,12 @@ static bool intel_psr2_config_valid(struct intel_dp *intel_dp,
return false;
}
+ if (crtc_state->pipe_bpp > max_bpp) {
+ DRM_DEBUG_KMS("PSR2 not enabled, pipe bpp %d > max supported %d\n",
+ crtc_state->pipe_bpp, max_bpp);
+ return false;
+ }
The wording of the bspec is "PSR2 is limited to 30bpp 10:10:10" and
"PSR2 is limited to 24bpp 8:8:8" --- that wording makes it sound like
you need to use that one specific mode rather than it being an upper
limit? I.e., do we need an == test here rather than >?
I understand "limited" here rather as a limit, not as the only mode it
works in. Yes, it's confusing, but I don't think it makes much sense to
support just one bpp.
Lucas De Marchi
Matt
+
/*
* HW sends SU blocks of size four scan lines, which means the starting
* X coordinate and Y granularity requirements will always be met. We
--
2.24.0
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--
Matt Roper
Graphics Software Engineer
VTT-OSGC Platform Enablement
Intel Corporation
(916) 356-2795
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