From: Douglas Anderson <dianders@xxxxxxxxxxxx> The current user of the analogix power_off is "analogix_dp-rockchip". That driver does this: - deactivate PSR - turn off a clock Both of these things (especially deactive PSR) should be done before we turn the PHY power off and turn off analog power. Let's move the callback up. Note that without this patch (and with https://patchwork.kernel.org/patch/9553349/ [seanpaul: this patch was not applied, but it seems like the race can still occur]), I experienced an error in reboot testing where one thread was at: rockchip_drm_psr_deactivate rockchip_dp_powerdown analogix_dp_bridge_disable drm_bridge_disable ...and the other thread was at: analogix_dp_send_psr_spd analogix_dp_enable_psr analogix_dp_psr_set psr_flush_handler The flush handler thread was finding AUX channel errors and eventually reported "Failed to apply PSR", where I had a kgdb breakpoint. Presumably the device would have eventually given up and shut down anyway, but it seems better to fix the order to be more correct. Cc: Kristian H. Kristensen <hoegsberg@xxxxxxxxxxxx> Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx> Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx> Signed-off-by: Thierry Escande <thierry.escande@xxxxxxxxxxxxx> Reviewed-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx> Tested-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> --- drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index 37b16643f14c..eaf93cbd47a8 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -1337,12 +1337,13 @@ static void analogix_dp_bridge_disable(struct drm_bridge *bridge) } disable_irq(dp->irq); - analogix_dp_set_analog_power_down(dp, POWER_ALL, 1); - phy_power_off(dp->phy); if (dp->plat_data->power_off) dp->plat_data->power_off(dp->plat_data); + analogix_dp_set_analog_power_down(dp, POWER_ALL, 1); + phy_power_off(dp->phy); + clk_disable_unprepare(dp->clock); pm_runtime_put_sync(dp->dev); -- 2.16.1 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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