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drm/i915: Group all the PPS init steps to one place 

Move the early PPS initialization calls next to the rest of PPS
initialization steps. This allows us to forgo a duplicated call to
intel_dp_init_panel_power_sequencer_registers() on VLV/CHV.

This will swap the order of DP AUX registration wrt. PPS initialization.
There is an existing race here in case of a user space access via the
DPAUX device node after DP AUX registration and before calling
intel_dp_init_panel_power_sequencer_registers(), but this change won't
make this worse. The fix for this is to separate DP AUX initialization
and registration, that's a separate work already underway.

The order of MST wrt. PPS init as well as the order of
intel_dp_init_panel_power_sequencer_registers() wrt.
intel_edp_panel_vdd_sanitize() also swap, which is ok, there are no
dependencies between these steps.

Suggested by Ville.

CC: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1466499109-20240-4-git-send-email-imre.deak@intel.com
This commit is contained in:
Imre Deak 2016-06-21 11:51:49 +03:00
parent 0080b5da39
commit b4d06ede4e
1 changed files with 24 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
drivers/gpu/drm/i915/intel_dp.c
View File

@ -5327,8 +5327,18 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
}
pps_lock(intel_dp);
intel_dp_init_panel_power_timestamps(intel_dp);
if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) {
vlv_initial_power_sequencer_setup(intel_dp);
} else {
intel_dp_init_panel_power_sequencer(dev, intel_dp);
intel_dp_init_panel_power_sequencer_registers(dev, intel_dp);
}
intel_edp_panel_vdd_sanitize(intel_dp);
intel_dp_init_panel_power_sequencer_registers(dev, intel_dp);
pps_unlock(intel_dp);
/* Cache DPCD and EDID for edp. */
@ -5342,7 +5352,7 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
} else {
/* if this fails, presume the device is a ghost */
DRM_INFO("failed to retrieve link info, disabling eDP\n");
return false;
goto out_vdd_off;
}
mutex_lock(&dev->mode_config.mutex);
@ -5412,6 +5422,18 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
intel_panel_setup_backlight(connector, pipe);
return true;
out_vdd_off:
cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
/*
* vdd might still be enabled do to the delayed vdd off.
* Make sure vdd is actually turned off here.
*/
pps_lock(intel_dp);
edp_panel_vdd_off_sync(intel_dp);
pps_unlock(intel_dp);
return false;
}
bool
@ -5518,16 +5540,6 @@ intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
BUG();
}
if (is_edp(intel_dp)) {
pps_lock(intel_dp);
intel_dp_init_panel_power_timestamps(intel_dp);
if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev))
vlv_initial_power_sequencer_setup(intel_dp);
else
intel_dp_init_panel_power_sequencer(dev, intel_dp);
pps_unlock(intel_dp);
}
ret = intel_dp_aux_init(intel_dp, intel_connector);
if (ret)
goto fail;
@ -5560,16 +5572,6 @@ intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
return true;
fail:
if (is_edp(intel_dp)) {
cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
/*
* vdd might still be enabled do to the delayed vdd off.
* Make sure vdd is actually turned off here.
*/
pps_lock(intel_dp);
edp_panel_vdd_off_sync(intel_dp);
pps_unlock(intel_dp);
}
drm_connector_unregister(connector);
drm_connector_cleanup(connector);