For DDR data rate reporting by Punit in PUNIT_GPU_FREQ_STS, the actual
data encoding is 00b=800, 01b=1066, 10b=1333, 11b=1333.
Some premium VLV sku will get the DDR_DATA_RATE set as 11. As a result,
the turbo frequency reporting will be incorrect without this workaround.
Signed-off-by: Chon Ming Lee <chon.ming.lee@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_pm.c | 7 +------
1 files changed, 1 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index a5778e5..13fb7f8 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5328,12 +5328,7 @@ static void valleyview_init_clock_gating(struct drm_device *dev)
dev_priv->mem_freq = 1333;
break;
case 3:
- /*
- * Probably a BIOS/Punit bug, or a new platform we don't
- * support yet.
- */
- WARN(1, "invalid DDR freq detected, assuming 800MHz\n");
- dev_priv->mem_freq = 800;
+ dev_priv->mem_freq = 1333;
break;
}
DRM_DEBUG_DRIVER("DDR speed: %d MHz", dev_priv->mem_freq);
--
1.7.7.6
_______________________________________________
Intel-gfx mailing list
Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
http://lists.freedesktop.org/mailman/listinfo/intel-gfx
