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| author | Dmitry Osipenko <digetx@gmail.com> | 2021-12-01 02:23:16 +0300 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2021-12-16 16:07:07 +0300 |
| commit | 9ca790f44606109071ab1a3a37ed99e91794c37c (patch) | |
| tree | 0b8989889ead1f4ee2f3b295fff9a9123adb6ff8 /drivers/gpu/host1x/channel.c | |
| parent | 6b6776e2ab8ac7086cf31ad339411df7681715b7 (diff) | |
| download | linux-9ca790f44606109071ab1a3a37ed99e91794c37c.tar.xz | |
gpu: host1x: Add host1x_channel_stop()
Add host1x_channel_stop() which waits till channel becomes idle and then
stops the channel hardware. This is needed for supporting suspend/resume
by host1x drivers since the hardware state is lost after power-gating,
thus the channel needs to be stopped before client enters into suspend.
Tested-by: Peter Geis <pgwipeout@gmail.com> # Ouya T30
Tested-by: Paul Fertser <fercerpav@gmail.com> # PAZ00 T20
Tested-by: Nicolas Chauvet <kwizart@gmail.com> # PAZ00 T20 and TK1 T124
Tested-by: Matt Merhar <mattmerhar@protonmail.com> # Ouya T30
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/gpu/host1x/channel.c')
| -rw-r--r-- | drivers/gpu/host1x/channel.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/host1x/channel.c b/drivers/gpu/host1x/channel.c index 4cd212bb570d..2a9a3a8d5931 100644 --- a/drivers/gpu/host1x/channel.c +++ b/drivers/gpu/host1x/channel.c @@ -75,6 +75,14 @@ struct host1x_channel *host1x_channel_get_index(struct host1x *host, return ch; } +void host1x_channel_stop(struct host1x_channel *channel) +{ + struct host1x *host = dev_get_drvdata(channel->dev->parent); + + host1x_hw_cdma_stop(host, &channel->cdma); +} +EXPORT_SYMBOL(host1x_channel_stop); + static void release_channel(struct kref *kref) { struct host1x_channel *channel = |