On Tue, 23 Oct 2012, Paulo Zanoni <[email protected]> wrote: > From: Paulo Zanoni <[email protected]> > > On Ironlake we have one PCH transcoder and FDI per pipe, so we know > that if ironlake_crtc_driving_pch returns false we can disable the PCH > transcoder and we also know that when we disable the crtc we can also > disable the PCH transcoder. > > On Haswell there is only 1 PCH transcoder and FDI and they can be used > by any CRTC. So if for one specific crtc haswell_crtc_driving_pch > returns false we can't assert anything about the state of the PCH > transcoder or the FDI link without checking if any other CRTC is using > the PCH. > > So on this commit remove the "assert_fdi_{t,r}x_disabled" form > haswell_crtc_enable and also only disable FDI and the PCH transcoder > if the port being disabled was actually a PCH port (we only have one > port using PCH: the VGA port).
I first wrote a message saying this is wrong, then revisited the patch, and finally reached the same conclusions as you... Reviewed-by: Jani Nikula <[email protected]> > > Signed-off-by: Paulo Zanoni <[email protected]> > --- > drivers/gpu/drm/i915/intel_display.c | 23 ++++++++++------------- > 1 file changed, 10 insertions(+), 13 deletions(-) > > diff --git a/drivers/gpu/drm/i915/intel_display.c > b/drivers/gpu/drm/i915/intel_display.c > index 0c4e9c5..67c9472 100644 > --- a/drivers/gpu/drm/i915/intel_display.c > +++ b/drivers/gpu/drm/i915/intel_display.c > @@ -3286,12 +3286,8 @@ static void haswell_crtc_enable(struct drm_crtc *crtc) > > is_pch_port = haswell_crtc_driving_pch(crtc); > > - if (is_pch_port) { > + if (is_pch_port) > ironlake_fdi_pll_enable(intel_crtc); > - } else { > - assert_fdi_tx_disabled(dev_priv, pipe); > - assert_fdi_rx_disabled(dev_priv, pipe); > - } > > for_each_encoder_on_crtc(dev, crtc, encoder) > if (encoder->pre_enable) > @@ -3433,10 +3429,13 @@ static void haswell_crtc_disable(struct drm_crtc > *crtc) > struct intel_encoder *encoder; > int pipe = intel_crtc->pipe; > int plane = intel_crtc->plane; > + bool is_pch_port; > > if (!intel_crtc->active) > return; > > + is_pch_port = haswell_crtc_driving_pch(crtc); > + > for_each_encoder_on_crtc(dev, crtc, encoder) > encoder->disable(encoder); > > @@ -3463,14 +3462,12 @@ static void haswell_crtc_disable(struct drm_crtc > *crtc) > if (encoder->post_disable) > encoder->post_disable(encoder); > > - ironlake_fdi_disable(crtc); > - > - intel_disable_transcoder(dev_priv, pipe); > - > - /* disable PCH DPLL */ > - intel_disable_pch_pll(intel_crtc); > - > - ironlake_fdi_pll_disable(intel_crtc); > + if (is_pch_port) { > + ironlake_fdi_disable(crtc); > + intel_disable_transcoder(dev_priv, pipe); > + intel_disable_pch_pll(intel_crtc); > + ironlake_fdi_pll_disable(intel_crtc); > + } > > intel_crtc->active = false; > intel_update_watermarks(dev); > -- > 1.7.11.4 > > _______________________________________________ > Intel-gfx mailing list > [email protected] > http://lists.freedesktop.org/mailman/listinfo/intel-gfx _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
