[Intel-gfx] [PATCH 10/15] drm/i915: Force common lane on for the PPS kick on CHV
From: Ville Syrjälä With DPIO powergating active the DPLL can't be accessed unless something else is keeping the common lane in the channel on. That means the PPS kick procedure could fail to enable the PLL. Power up some data lanes to force the common lane to power up so that the PLL can be enabled temporarily. Signed-off-by: Ville Syrjälä --- drivers/gpu/drm/i915/intel_dp.c | 16 +--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 8d088f3..817df87 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -341,7 +341,9 @@ vlv_power_sequencer_kick(struct intel_dp *intel_dp) struct drm_device *dev = intel_dig_port->base.base.dev; struct drm_i915_private *dev_priv = dev->dev_private; enum pipe pipe = intel_dp->pps_pipe; - bool pll_enabled; + bool pll_enabled, release_cl_override; + enum dpio_phy phy = DPIO_PHY(pipe); + enum dpio_channel ch = vlv_pipe_to_channel(pipe); uint32_t DP; if (WARN(I915_READ(intel_dp->output_reg) & DP_PORT_EN, @@ -371,9 +373,13 @@ vlv_power_sequencer_kick(struct intel_dp *intel_dp) * The DPLL for the pipe must be enabled for this to work. * So enable temporarily it if it's not already enabled. */ - if (!pll_enabled) + if (!pll_enabled) { + release_cl_override = IS_CHERRYVIEW(dev) && + !chv_phy_powergate_ch(dev_priv, phy, ch, true); + vlv_force_pll_on(dev, pipe, IS_CHERRYVIEW(dev) ? &chv_dpll[0].dpll : &vlv_dpll[0].dpll); + } /* * Similar magic as in intel_dp_enable_port(). @@ -390,8 +396,12 @@ vlv_power_sequencer_kick(struct intel_dp *intel_dp) I915_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN); POSTING_READ(intel_dp->output_reg); - if (!pll_enabled) + if (!pll_enabled) { vlv_force_pll_off(dev, pipe); + + if (release_cl_override) + chv_phy_powergate_ch(dev_priv, phy, ch, false); + } } static enum pipe -- 2.3.6 ___ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
Re: [Intel-gfx] [PATCH 10/15] drm/i915: Force common lane on for the PPS kick on CHV
On 07/09/2015 02:15 AM, ville.syrj...@linux.intel.com wrote: From: Ville Syrjälä With DPIO powergating active the DPLL can't be accessed unless something else is keeping the common lane in the channel on. That means the PPS kick procedure could fail to enable the PLL. Power up some data lanes to force the common lane to power up so that the PLL can be enabled temporarily. Signed-off-by: Ville Syrjälä --- drivers/gpu/drm/i915/intel_dp.c | 16 +--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 8d088f3..817df87 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -341,7 +341,9 @@ vlv_power_sequencer_kick(struct intel_dp *intel_dp) struct drm_device *dev = intel_dig_port->base.base.dev; struct drm_i915_private *dev_priv = dev->dev_private; enum pipe pipe = intel_dp->pps_pipe; - bool pll_enabled; + bool pll_enabled, release_cl_override; + enum dpio_phy phy = DPIO_PHY(pipe); + enum dpio_channel ch = vlv_pipe_to_channel(pipe); uint32_t DP; if (WARN(I915_READ(intel_dp->output_reg) & DP_PORT_EN, @@ -371,9 +373,13 @@ vlv_power_sequencer_kick(struct intel_dp *intel_dp) * The DPLL for the pipe must be enabled for this to work. * So enable temporarily it if it's not already enabled. */ - if (!pll_enabled) + if (!pll_enabled) { + release_cl_override = IS_CHERRYVIEW(dev) && + !chv_phy_powergate_ch(dev_priv, phy, ch, true); + vlv_force_pll_on(dev, pipe, IS_CHERRYVIEW(dev) ? &chv_dpll[0].dpll : &vlv_dpll[0].dpll); + } /* * Similar magic as in intel_dp_enable_port(). @@ -390,8 +396,12 @@ vlv_power_sequencer_kick(struct intel_dp *intel_dp) I915_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN); POSTING_READ(intel_dp->output_reg); - if (!pll_enabled) + if (!pll_enabled) { vlv_force_pll_off(dev, pipe); + + if (release_cl_override) + chv_phy_powergate_ch(dev_priv, phy, ch, false); + } } static enum pipe Change looks fine Reviewed-by: Deepak S ___ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
Re: [Intel-gfx] [PATCH 10/15] drm/i915: Force common lane on for the PPS kick on CHV
On Wed, Aug 19, 2015 at 07:51:57AM +0530, Deepak wrote: > > > On 07/09/2015 02:15 AM, ville.syrj...@linux.intel.com wrote: > > From: Ville Syrjälä > > > > With DPIO powergating active the DPLL can't be accessed unless > > something else is keeping the common lane in the channel on. > > That means the PPS kick procedure could fail to enable the PLL. > > > > Power up some data lanes to force the common lane to power up > > so that the PLL can be enabled temporarily. > > > > Signed-off-by: Ville Syrjälä > > --- > > drivers/gpu/drm/i915/intel_dp.c | 16 +--- > > 1 file changed, 13 insertions(+), 3 deletions(-) > > > > diff --git a/drivers/gpu/drm/i915/intel_dp.c > > b/drivers/gpu/drm/i915/intel_dp.c > > index 8d088f3..817df87 100644 > > --- a/drivers/gpu/drm/i915/intel_dp.c > > +++ b/drivers/gpu/drm/i915/intel_dp.c > > @@ -341,7 +341,9 @@ vlv_power_sequencer_kick(struct intel_dp *intel_dp) > > struct drm_device *dev = intel_dig_port->base.base.dev; > > struct drm_i915_private *dev_priv = dev->dev_private; > > enum pipe pipe = intel_dp->pps_pipe; > > - bool pll_enabled; > > + bool pll_enabled, release_cl_override; > > + enum dpio_phy phy = DPIO_PHY(pipe); > > + enum dpio_channel ch = vlv_pipe_to_channel(pipe); > > uint32_t DP; > > > > if (WARN(I915_READ(intel_dp->output_reg) & DP_PORT_EN, > > @@ -371,9 +373,13 @@ vlv_power_sequencer_kick(struct intel_dp *intel_dp) > > * The DPLL for the pipe must be enabled for this to work. > > * So enable temporarily it if it's not already enabled. > > */ > > - if (!pll_enabled) > > + if (!pll_enabled) { > > + release_cl_override = IS_CHERRYVIEW(dev) && > > + !chv_phy_powergate_ch(dev_priv, phy, ch, true); > > + > > vlv_force_pll_on(dev, pipe, IS_CHERRYVIEW(dev) ? > > &chv_dpll[0].dpll : &vlv_dpll[0].dpll); > > + } > > > > /* > > * Similar magic as in intel_dp_enable_port(). > > @@ -390,8 +396,12 @@ vlv_power_sequencer_kick(struct intel_dp *intel_dp) > > I915_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN); > > POSTING_READ(intel_dp->output_reg); > > > > - if (!pll_enabled) > > + if (!pll_enabled) { > > vlv_force_pll_off(dev, pipe); > > + > > + if (release_cl_override) > > + chv_phy_powergate_ch(dev_priv, phy, ch, false); > > + } > > } > > > > static enum pipe > Change looks fine > Reviewed-by: Deepak S Note to Daniel: Please pick up v2 of this patch. The only change was release_cl_override=false initialization to avoid a gcc warning. -- Ville Syrjälä Intel OTC ___ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx