diff options
| author | Mikko Perttunen <mperttunen@nvidia.com> | 2023-09-01 14:15:08 +0300 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2023-10-11 23:52:44 +0300 |
| commit | 87fafcd53df8ca5b6695a71aa17f2e7aff464ecc (patch) | |
| tree | f581e382f4f5ecd48a1f6a4f2b310456b9c3b848 /drivers/gpu/host1x/channel.c | |
| parent | 9764723de613d93b72e95923d25d589f539f07e9 (diff) | |
| download | linux-87fafcd53df8ca5b6695a71aa17f2e7aff464ecc.tar.xz | |
gpu: host1x: Stop CDMA before suspending
Before going into suspend, wait all CDMA to go idle and stop it.
This will ensure no channel is still active while we enter
suspend, and ensures the driver doesn't think that CDMA is still
active when coming back from suspend (as HW state has been reset).
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230901111510.663401-2-cyndis@kapsi.fi
Diffstat (limited to 'drivers/gpu/host1x/channel.c')
| -rw-r--r-- | drivers/gpu/host1x/channel.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/gpu/host1x/channel.c b/drivers/gpu/host1x/channel.c index 79501c957532..08077afe4cde 100644 --- a/drivers/gpu/host1x/channel.c +++ b/drivers/gpu/host1x/channel.c @@ -81,6 +81,25 @@ void host1x_channel_stop(struct host1x_channel *channel) } EXPORT_SYMBOL(host1x_channel_stop); +/** + * host1x_channel_stop_all() - disable CDMA on allocated channels + * @host: host1x instance + * + * Stop CDMA on allocated channels + */ +void host1x_channel_stop_all(struct host1x *host) +{ + struct host1x_channel_list *chlist = &host->channel_list; + int bit; + + mutex_lock(&chlist->lock); + + for_each_set_bit(bit, chlist->allocated_channels, host->info->nb_channels) + host1x_channel_stop(&chlist->channels[bit]); + + mutex_unlock(&chlist->lock); +} + static void release_channel(struct kref *kref) { struct host1x_channel *channel = |