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Merge tag 'drm-intel-fixes-2015-05-21' of git://anongit.freedesktop.org/drm-intel into drm-fixes

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There's a stable backport from Ander [1] that combines this and a few
other commits to fix the flickering on v4.0, reported in [2] among
others. Having this upstream is obviously a requirement for stable.

* tag 'drm-intel-fixes-2015-05-21' of git://anongit.freedesktop.org/drm-intel:
  drm/i915: fix screen flickering
This commit is contained in:
Dave Airlie 2015-05-22 13:31:03 +10:00
commit bb4358973a
1 changed files with 11 additions and 13 deletions
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24
drivers/gpu/drm/i915/intel_pm.c
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@ -2045,22 +2045,20 @@ static void ilk_compute_wm_parameters(struct drm_crtc *crtc,
p->pipe_htotal = intel_crtc->config->base.adjusted_mode.crtc_htotal;
p->pixel_rate = ilk_pipe_pixel_rate(dev, crtc);
if (crtc->primary->state->fb) {
p->pri.enabled = true;
if (crtc->primary->state->fb)
p->pri.bytes_per_pixel =
crtc->primary->state->fb->bits_per_pixel / 8;
} else {
p->pri.enabled = false;
p->pri.bytes_per_pixel = 0;
}
else
p->pri.bytes_per_pixel = 4;
p->cur.bytes_per_pixel = 4;
/*
* TODO: for now, assume primary and cursor planes are always enabled.
* Setting them to false makes the screen flicker.
*/
p->pri.enabled = true;
p->cur.enabled = true;
if (crtc->cursor->state->fb) {
p->cur.enabled = true;
p->cur.bytes_per_pixel = 4;
} else {
p->cur.enabled = false;
p->cur.bytes_per_pixel = 0;
}
p->pri.horiz_pixels = intel_crtc->config->pipe_src_w;
p->cur.horiz_pixels = intel_crtc->base.cursor->state->crtc_w;