From 8361663420435bd915cb5beb20df8da29e06c1dd Mon Sep 17 00:00:00 2001 From: Paulo Zanoni Date: Tue, 23 Oct 2012 18:29:54 -0200 Subject: [PATCH] drm/i915: don't call Haswell PCH code when we can't or don't need 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). Signed-off-by: Paulo Zanoni Reviewed-by: Jani Nikula Signed-off-by: Daniel Vetter --- 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 10222e88b95e..1f02486e444c 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -3283,12 +3283,8 @@ 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) @@ -3430,10 +3426,13 @@ 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); @@ -3460,14 +3459,12 @@ 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); -- 2.39.5