Is this something close to what we wanted to optimize for edp resume time and using wall clock.
-----Original Message-----
From: Kumar, Abhay
Sent: Tuesday, December 15, 2015 2:17 PM
To: Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
Cc: Kumar, Abhay
Subject: [PATCH] drm/i915: edp resume/On time optimization.
From: Abhay Kumar <abhay.kumar@xxxxxxxxx>
Make resume codepath not to wait for panel_power_cycle_delay(t11_t12) if this time is already spent in suspend/poweron time.
Signed-off-by: Abhay Kumar <abhay.kumar@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_ddi.c | 3 +++ drivers/gpu/drm/i915/intel_dp.c | 18 ++++++++++++++++++ drivers/gpu/drm/i915/intel_drv.h | 2 ++
3 files changed, 23 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index f00a3c9..d2a5a89 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -2395,6 +2395,9 @@ static void intel_ddi_post_disable(struct intel_encoder *intel_encoder)
intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
intel_edp_panel_vdd_on(intel_dp);
intel_edp_panel_off(intel_dp);
+
+ /* storing panel power off time */
+ do_gettimeofday(&intel_dp->panel_power_off_timestamp);
}
if (IS_SKYLAKE(dev) || IS_KABYLAKE(dev)) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 0f1eb96..1ca01b1 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -2032,6 +2032,9 @@ static void edp_panel_on(struct intel_dp *intel_dp)
struct drm_i915_private *dev_priv = dev->dev_private;
u32 pp;
i915_reg_t pp_ctrl_reg;
+ u32 panel_power_off_duration;
+ u32 temp_power_cycle_delay;
+
lockdep_assert_held(&dev_priv->pps_mutex);
@@ -2045,8 +2048,22 @@ static void edp_panel_on(struct intel_dp *intel_dp)
"eDP port %c panel power already on\n",
port_name(dp_to_dig_port(intel_dp)->port)))
return;
+ /* taking the diffrence of currrent time and panel power off time
+ and then make panel to wait for T12 if needed */
+ do_gettimeofday(&intel_dp->panel_power_on_timestamp);
+
+ panel_power_off_duration = (intel_dp->panel_power_on_timestamp.tv_sec-intel_dp->panel_power_off_timestamp.tv_sec) * 1000000 + intel_dp->panel_power_on_timestamp.tv_usec-intel_dp->panel_power_off_timestamp.tv_usec;
+ panel_power_off_duration = panel_power_off_duration / 1000 ;
+ temp_power_cycle_delay = intel_dp->panel_power_cycle_delay;
+
+ if(panel_power_off_duration >= intel_dp->panel_power_cycle_delay) {
+ intel_dp->panel_power_cycle_delay = 0;
+ } else {
+ intel_dp->panel_power_cycle_delay = intel_dp->panel_power_cycle_delay - panel_power_off_duration;
+ }
wait_panel_power_cycle(intel_dp);
+ intel_dp->panel_power_cycle_delay = temp_power_cycle_delay;
pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
pp = ironlake_get_pp_control(intel_dp);
@@ -5127,6 +5144,7 @@ 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;
+ do_gettimeofday(&intel_dp->panel_power_off_timestamp);
}
static void
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 76dfa28..66ed2cb 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -769,6 +769,8 @@ struct intel_dp {
unsigned long last_power_cycle;
unsigned long last_power_on;
unsigned long last_backlight_off;
+ struct timeval panel_power_off_timestamp;
+ struct timeval panel_power_on_timestamp;
struct notifier_block edp_notifier;
--
1.9.1
_______________________________________________
Intel-gfx mailing list
Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
http://lists.freedesktop.org/mailman/listinfo/intel-gfx
