diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2016-07-29 17:57:01 +0300 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2016-08-02 16:21:48 +0300 |
| commit | 2d1b50564734619487745fe14dc2999b1f4a15d2 (patch) | |
| tree | 26cd34d447c4a5e38c226c5337925d95bed76fe6 | |
| parent | a930acd91f46ad4ae15d14a8c018bb9356ef3be6 (diff) | |
| download | linux-2d1b50564734619487745fe14dc2999b1f4a15d2.tar.xz | |
drm/i915: Always use cpp==4 for FW_BLC_SELF on 915GM/945GM
Bspec says:
"FW_BLC_SELF
...
Programming Note [DevALV] and [DevCST]: When calculating watermark
values for 15/16bpp, assume 32bpp for purposes of calculation using
the high priority bandwidth analysis spreadsheet."
Let's do that.
Perhaps this might even help with the problem that resulted in
commit 2ab1bc9df01d ("drm/i915: Disable self-refresh for untiled fbs on i915gm")
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1469804222-12650-1-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index b5513d3a2df8..e2eee775da46 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -1604,6 +1604,9 @@ static void i9xx_update_wm(struct drm_crtc *unused_crtc) unsigned long line_time_us; int entries; + if (IS_I915GM(dev) || IS_I945GM(dev)) + cpp = 4; + line_time_us = max(htotal * 1000 / clock, 1); /* Use ns/us then divide to preserve precision */ |