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* [PATCH] drm/i915: Wait for power cycle delay after turning off DSI panel power
@ 2016-04-18 16:17 ville.syrjala
  2016-04-18 17:19 ` Jani Nikula
                   ` (2 more replies)
  0 siblings, 3 replies; 6+ messages in thread
From: ville.syrjala @ 2016-04-18 16:17 UTC (permalink / raw)
  To: intel-gfx; +Cc: Jani Nikula, Shobhit Kumar

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

The power cycle delay starts _after_ turning off the panel power. Do the
msleep after frobbing the pmic panel power gpio.

Also toss in a FIXME about optimizing away needless waits.

Cc: Shobhit Kumar <shobhit.kumar@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Fixes: fc45e8219907 ("drm/i915: Use the CRC gpio for panel enable/disable")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/intel_dsi.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
index 34328ddaaab5..2b22bb9bb86f 100644
--- a/drivers/gpu/drm/i915/intel_dsi.c
+++ b/drivers/gpu/drm/i915/intel_dsi.c
@@ -688,11 +688,16 @@ static void intel_dsi_post_disable(struct intel_encoder *encoder)
 	drm_panel_unprepare(intel_dsi->panel);
 
 	msleep(intel_dsi->panel_off_delay);
-	msleep(intel_dsi->panel_pwr_cycle_delay);
 
 	/* Panel Disable over CRC PMIC */
 	if (intel_dsi->gpio_panel)
 		gpiod_set_value_cansleep(intel_dsi->gpio_panel, 0);
+
+	/*
+	 * FIXME As we do with eDP, just make a note of the time here
+	 * and perform the wait before the next panel power on.
+	 */
+	msleep(intel_dsi->panel_pwr_cycle_delay);
 }
 
 static bool intel_dsi_get_hw_state(struct intel_encoder *encoder,
-- 
2.7.4

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^ permalink raw reply related	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2016-04-19 11:59 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-04-18 16:17 [PATCH] drm/i915: Wait for power cycle delay after turning off DSI panel power ville.syrjala
2016-04-18 17:19 ` Jani Nikula
2016-04-18 17:24 ` ✗ Fi.CI.BAT: warning for " Patchwork
2016-04-19 11:56   ` Ville Syrjälä
2016-04-19  2:30 ` [PATCH] " Kumar, Shobhit
2016-04-19 11:59   ` Ville Syrjälä

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