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drm/i915: fix initial timestamps for PP sequencing logic

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The initial jiffies value can be non-0, so set the inital panel power
sequencer timestamps accordingly. This didn't cause a problem on 64 bit
machines but on 32 bit jiffies is initially -300*HZ, so if the panel
power is initally off in the call from edp_panel_vdd_on()->
wait_panel_power_cycle() we'd wait up to ~300 sec more than needed.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Imre Deak 2014-01-29 13:25:41 +02:00 committed by Daniel Vetter
parent ec5e0cfb19
commit dada1a9ffc
1 changed files with 10 additions and 1 deletions
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11
drivers/gpu/drm/i915/intel_dp.c
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@ -3491,6 +3491,13 @@ intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connect
}
}
static void intel_dp_init_panel_power_timestamps(struct intel_dp *intel_dp)
{
intel_dp->last_power_cycle = jiffies;
intel_dp->last_power_on = jiffies;
intel_dp->last_backlight_off = jiffies;
}
static void
intel_dp_init_panel_power_sequencer(struct drm_device *dev,
struct intel_dp *intel_dp,
@ -3835,8 +3842,10 @@ intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
BUG();
}
if (is_edp(intel_dp))
if (is_edp(intel_dp)) {
intel_dp_init_panel_power_timestamps(intel_dp);
intel_dp_init_panel_power_sequencer(dev, intel_dp, &power_seq);
}
error = intel_dp_i2c_init(intel_dp, intel_connector, name);
WARN(error, "intel_dp_i2c_init failed with error %d for port %c\n",