lkml.org 
[lkml]   [2020]   [Dec]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 33/48] gpu: host1x: Add host1x_channel_stop()
Date
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 entering into suspend.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
drivers/gpu/host1x/channel.c | 8 ++++++++
include/linux/host1x.h | 1 +
2 files changed, 9 insertions(+)

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 =
diff --git a/include/linux/host1x.h b/include/linux/host1x.h
index ce59a6a6a008..565833689be2 100644
--- a/include/linux/host1x.h
+++ b/include/linux/host1x.h
@@ -167,6 +167,7 @@ struct host1x_job;

struct host1x_channel *host1x_channel_request(struct host1x_client *client);
struct host1x_channel *host1x_channel_get(struct host1x_channel *channel);
+void host1x_channel_stop(struct host1x_channel *channel);
void host1x_channel_put(struct host1x_channel *channel);
int host1x_job_submit(struct host1x_job *job);

--
2.29.2
\
 
 \ /
  Last update: 2020-12-17 19:40    [W:0.392 / U:0.196 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site