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drm/i915: Enable PCH FIFO underruns later on HSW+

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As we did for ILK/SNB/IVB, move the PCH FIFO underrun enable to happen
after the encoder enable on HSW+. And again, for symmetry, move the
the disable to happen before encoder disable.

I've left out the vblank wait before the enable here because I don't
know if it's needed or not. Actually I don't know if this entire
change is needed as I don't have a HSW/BDW with VGA output.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1446146763-31821-5-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Ville Syrjälä 2015-10-29 21:25:53 +02:00
parent 37ca8d4ccd
commit d2d65408cc
1 changed files with 9 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

16
drivers/gpu/drm/i915/intel_display.c
View file

@ -4936,11 +4936,8 @@ static void haswell_crtc_enable(struct drm_crtc *crtc)
encoder->pre_enable(encoder);
}
if (intel_crtc->config->has_pch_encoder) {
intel_set_pch_fifo_underrun_reporting(dev_priv, TRANSCODER_A,
true);
if (intel_crtc->config->has_pch_encoder)
dev_priv->display.fdi_link_train(crtc);
}
if (!is_dsi)
intel_ddi_enable_pipe_clock(intel_crtc);
@ -4977,6 +4974,10 @@ static void haswell_crtc_enable(struct drm_crtc *crtc)
intel_opregion_notify_encoder(encoder, true);
}
if (intel_crtc->config->has_pch_encoder)
intel_set_pch_fifo_underrun_reporting(dev_priv, TRANSCODER_A,
true);
/* If we change the relative order between pipe/planes enabling, we need
* to change the workaround. */
hsw_workaround_pipe = pipe_config->hsw_workaround_pipe;
@ -5061,6 +5062,10 @@ static void haswell_crtc_disable(struct drm_crtc *crtc)
enum transcoder cpu_transcoder = intel_crtc->config->cpu_transcoder;
bool is_dsi = intel_pipe_has_type(intel_crtc, INTEL_OUTPUT_DSI);
if (intel_crtc->config->has_pch_encoder)
intel_set_pch_fifo_underrun_reporting(dev_priv, TRANSCODER_A,
false);
for_each_encoder_on_crtc(dev, crtc, encoder) {
intel_opregion_notify_encoder(encoder, false);
encoder->disable(encoder);
@ -5069,9 +5074,6 @@ static void haswell_crtc_disable(struct drm_crtc *crtc)
drm_crtc_vblank_off(crtc);
assert_vblank_disabled(crtc);
if (intel_crtc->config->has_pch_encoder)
intel_set_pch_fifo_underrun_reporting(dev_priv, TRANSCODER_A,
false);
intel_disable_pipe(intel_crtc);
if (intel_crtc->config->dp_encoder_is_mst)