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* [PATCH v4] drm/i915: edp resume/On time optimization.
@ 2016-01-13  1:57 abhay.kumar
  2016-01-13  8:02 ` Kumar, Shobhit
                   ` (6 more replies)
  0 siblings, 7 replies; 18+ messages in thread
From: abhay.kumar @ 2016-01-13  1:57 UTC (permalink / raw)
  To: Intel-gfx, ville.syrjala

From: Abhay Kumar <abhay.kumar@intel.com>

Make resume/on codepath not to wait for panel_power_cycle_delay(t11_t12)
if this time is already spent in suspend/poweron time.

v2: Use CLOCK_BOOTTIME and remove jiffies for panel power cycle
    delay calculation(Ville).

v3: Addressed below comments
    1. Tracking time from where last powercycle is initiated.
    2. Used ktime_get_bootime() wrapper for boottime clock.
    3. Used ktime_ms_delta() to get time difference.

v4: Updated v3 change log in detail.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Abhay Kumar <abhay.kumar@intel.com>
---
 drivers/gpu/drm/i915/intel_dp.c  | 19 ++++++++++++++-----
 drivers/gpu/drm/i915/intel_drv.h |  2 +-
 2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 796e3d3..0042693 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1812,12 +1812,21 @@ static void wait_panel_off(struct intel_dp *intel_dp)
 
 static void wait_panel_power_cycle(struct intel_dp *intel_dp)
 {
+	static ktime_t panel_power_on_time;
+	s64 panel_power_off_duration;
+
 	DRM_DEBUG_KMS("Wait for panel power cycle\n");
 
+	/* take the difference of currrent time and panel power off time
+	 * and then make panel wait for t11_t12 if needed. */
+	panel_power_on_time = ktime_get_boottime();
+	panel_power_off_duration = ktime_ms_delta(panel_power_on_time, intel_dp->panel_power_off_time);
+
 	/* When we disable the VDD override bit last we have to do the manual
 	 * wait. */
-	wait_remaining_ms_from_jiffies(intel_dp->last_power_cycle,
-				       intel_dp->panel_power_cycle_delay);
+	if (panel_power_off_duration < (s64)intel_dp->panel_power_cycle_delay)
+		wait_remaining_ms_from_jiffies(jiffies,
+				       intel_dp->panel_power_cycle_delay - panel_power_off_duration);
 
 	wait_panel_status(intel_dp, IDLE_CYCLE_MASK, IDLE_CYCLE_VALUE);
 }
@@ -1969,7 +1978,7 @@ static void edp_panel_vdd_off_sync(struct intel_dp *intel_dp)
 	I915_READ(pp_stat_reg), I915_READ(pp_ctrl_reg));
 
 	if ((pp & POWER_TARGET_ON) == 0)
-		intel_dp->last_power_cycle = jiffies;
+		intel_dp->panel_power_off_time = ktime_get_boottime();
 
 	power_domain = intel_display_port_aux_power_domain(intel_encoder);
 	intel_display_power_put(dev_priv, power_domain);
@@ -2118,7 +2127,7 @@ static void edp_panel_off(struct intel_dp *intel_dp)
 	I915_WRITE(pp_ctrl_reg, pp);
 	POSTING_READ(pp_ctrl_reg);
 
-	intel_dp->last_power_cycle = jiffies;
+	intel_dp->panel_power_off_time = ktime_get_boottime();
 	wait_panel_off(intel_dp);
 
 	/* We got a reference when we enabled the VDD. */
@@ -5122,7 +5131,7 @@ 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->panel_power_off_time = ktime_get_boottime();
 	intel_dp->last_power_on = jiffies;
 	intel_dp->last_backlight_off = jiffies;
 }
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index bdfe403..06b37b8 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -793,9 +793,9 @@ struct intel_dp {
 	int backlight_off_delay;
 	struct delayed_work panel_vdd_work;
 	bool want_panel_vdd;
-	unsigned long last_power_cycle;
 	unsigned long last_power_on;
 	unsigned long last_backlight_off;
+	ktime_t panel_power_off_time;
 
 	struct notifier_block edp_notifier;
 
-- 
1.9.1

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^ permalink raw reply related	[flat|nested] 18+ messages in thread

end of thread, other threads:[~2016-02-12 16:08 UTC | newest]

Thread overview: 18+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-01-13  1:57 [PATCH v4] drm/i915: edp resume/On time optimization abhay.kumar
2016-01-13  8:02 ` Kumar, Shobhit
2016-01-13 10:20 ` ✗ warning: Fi.CI.BAT Patchwork
2016-01-14 23:53 ` [PATCH v4] drm/i915: edp resume/On time optimization Kumar, Abhay
2016-01-19 22:37 ` Kumar, Abhay
2016-01-20  9:00   ` Daniel Vetter
2016-01-20  9:59     ` Kumar, Shobhit
2016-01-20 13:06       ` Ville Syrjälä
2016-01-21 12:17         ` Kumar, Abhay
2016-01-22  5:48           ` Kumar, Shobhit
2016-01-31  7:20             ` Kumar, Abhay
2016-01-23  1:39 ` [PATCH V5] " abhay.kumar
2016-02-12  1:58   ` Kumar, Abhay
2016-02-12 16:07   ` Daniel Vetter
2016-01-23  8:43 ` ✗ Fi.CI.BAT: failure for drm/i915: edp resume/On time optimization. (rev10) Patchwork
2016-01-26 11:36   ` Ville Syrjälä
2016-01-27  0:21     ` Kumar, Abhay
2016-01-28 12:32 ` ✗ Fi.CI.BAT: warning " Patchwork

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