diff options
| author | yangcong <yangcong5@huaqin.corp-partner.google.com> | 2021-11-12 11:43:02 +0300 |
|---|---|---|
| committer | Douglas Anderson <dianders@chromium.org> | 2021-11-17 19:45:28 +0300 |
| commit | aa70a0996b0ee5950237cfe5f039285eda0c1470 (patch) | |
| tree | a628f7893f6cb524933c9ba7121343f036757c0c /drivers/gpu/drm | |
| parent | 49c39ec4670a8f045729e3717af2e1a74caf89a5 (diff) | |
| download | linux-aa70a0996b0ee5950237cfe5f039285eda0c1470.tar.xz | |
drm/bridge: parade-ps8640: Fix additional suspend/resume at bootup
Through log and waveform, we can see that there will be additional
suspend/resume when booting. This timing does not meet the ps8640 spec.
It seems that the delay of 500ms does not satisfied drm_panel_get_modes.
I increased it to 900ms and it seems that this problem can be solved.
To be safe, I'd just round up to a full 1000.
Signed-off-by: yangcong <yangcong5@huaqin.corp-partner.google.com>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20211112084302.2447931-1-yangcong5@huaqin.corp-partner.google.com
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/bridge/parade-ps8640.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c index 345bb2b4e15d..26898042ba3d 100644 --- a/drivers/gpu/drm/bridge/parade-ps8640.c +++ b/drivers/gpu/drm/bridge/parade-ps8640.c @@ -634,13 +634,13 @@ static int ps8640_probe(struct i2c_client *client) pm_runtime_enable(dev); /* * Powering on ps8640 takes ~300ms. To avoid wasting time on power - * cycling ps8640 too often, set autosuspend_delay to 500ms to ensure + * cycling ps8640 too often, set autosuspend_delay to 1000ms to ensure * the bridge wouldn't suspend in between each _aux_transfer_msg() call * during EDID read (~20ms in my experiment) and in between the last * _aux_transfer_msg() call during EDID read and the _pre_enable() call * (~100ms in my experiment). */ - pm_runtime_set_autosuspend_delay(dev, 500); + pm_runtime_set_autosuspend_delay(dev, 1000); pm_runtime_use_autosuspend(dev); pm_suspend_ignore_children(dev, true); ret = devm_add_action_or_reset(dev, ps8640_runtime_disable, dev); |