On Mon, 18 Apr 2016, ville.syrjala@xxxxxxxxxxxxxxx wrote:
> From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
>
> 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@xxxxxxxxx>
> Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
> Fixes: fc45e8219907 ("drm/i915: Use the CRC gpio for panel enable/disable")
> Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
> ---
> 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,
--
Jani Nikula, Intel Open Source Technology Center
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