diff options
| author | Adam Jiang <chaoj@nvidia.com> | 2012-03-01 13:07:26 +0900 |
|---|---|---|
| committer | Simone Willett <swillett@nvidia.com> | 2012-03-02 18:07:52 -0800 |
| commit | abf888f5810713adb049b5aa79bf6ac58398435f (patch) | |
| tree | ec5923f34024751238b1b234886d5d444c912895 | |
| parent | 5dbd2046e1cfb883be3f3655bd6a68de5fd604a3 (diff) | |
dtv: Added power management support
Added suspend/resume function in kernel model to support power
management.
fixed bug 914638
Change-Id: I2746710b6eba6d2528f27b4226383985e314943f
Signed-off-by: Adam Jiang <chaoj@nvidia.com>
Reviewed-on: http://git-master/r/86757
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
| -rw-r--r-- | drivers/media/video/tegra/tegra_dtv.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/media/video/tegra/tegra_dtv.c b/drivers/media/video/tegra/tegra_dtv.c index e1e2596007f6..97a1f231ec58 100644 --- a/drivers/media/video/tegra/tegra_dtv.c +++ b/drivers/media/video/tegra/tegra_dtv.c @@ -1011,6 +1011,8 @@ static int __devexit tegra_dtv_remove(struct platform_device *pdev) tear_down_dma(dtv_ctx); release_stream_buffer(&dtv_ctx->stream, dtv_ctx->stream.num_bufs); + clk_put(dtv_ctx->clk); + misc_deregister(&dtv_ctx->miscdev); return 0; @@ -1019,11 +1021,38 @@ static int __devexit tegra_dtv_remove(struct platform_device *pdev) #ifdef CONFIG_PM static int tegra_dtv_suspend(struct platform_device *pdev, pm_message_t state) { + struct tegra_dtv_context *dtv_ctx; + + pr_info("%s: suspend dtv.\n", __func__); + + dtv_ctx = platform_get_drvdata(pdev); + + /* stop xferring */ + mutex_lock(&dtv_ctx->stream.mtx); + if (dtv_ctx->stream.xferring) { + stop_xfer_unsafe(&dtv_ctx->stream); + /* clean up stop condition */ + complete(&dtv_ctx->stream.stop_completion); + __force_xfer_stop(&dtv_ctx->stream); + } + /* wakeup any pending process */ + wakeup_suspend(&dtv_ctx->stream); + mutex_unlock(&dtv_ctx->stream.mtx); + + clk_disable(dtv_ctx->clk); + return 0; } static int tegra_dtv_resume(struct platform_device *pdev) { + struct tegra_dtv_context *dtv_ctx; + + pr_info("%s: resume dtv.\n", __func__); + + dtv_ctx = platform_get_drvdata(pdev); + clk_enable(dtv_ctx->clk); + return 0; } #endif /* CONFIG_PM */ |