On Fri, Jan 22, 2016 at 05:39:04PM -0800, abhay.ku...@intel.com wrote:
> From: Abhay Kumar <abhay.ku...@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.
>
> v5: Removed static from panel_power_on_time(Stéphane).
>
> Cc: Ville Syrjälä <ville.syrj...@linux.intel.com>
> Signed-off-by: Abhay Kumar <abhay.ku...@intel.com>
> Reviewed-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
Queued for -next, thanks for the patch.
-Daniel
> ---
> 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 e2bea710..29f21c1 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -1811,12 +1811,21 @@ static void wait_panel_off(struct intel_dp *intel_dp)
>
> static void wait_panel_power_cycle(struct intel_dp *intel_dp)
> {
> + 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);
> }
> @@ -1968,7 +1977,7 @@ 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);
> @@ -2117,7 +2126,7 @@ 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. */
> @@ -5116,7 +5125,7 @@ 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 bc97012..137e40d 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -770,9 +770,9 @@ 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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> Intel-gfx@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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