On 22 September 2014 18:05, Philipp Zabel <p.za...@pengutronix.de> wrote:
> From: Ulf Hansson <ulf.hans...@linaro.org>
>
> For several reasons it's good practice to leave devices in runtime PM
> active state while those have been probed.
>
> In this cases we also want to prevent the device from going inactive,
> until the firmware has been completely installed, especially when using
> a PM domain.
>
> Signed-off-by: Ulf Hansson <ulf.hans...@linaro.org>
> Signed-off-by: Philipp Zabel <p.za...@pengutronix.de>
Thanks for moving this to the next version, I have been a bit busy the
last week.
Changes looking good!
Kind regards
Uffe
>
> ---
> Changes since v1:
> - Deactivate PM domain on error
> - Added a comment to runtime PM setup
> ---
> drivers/media/platform/coda/coda-common.c | 55
> ++++++++++++-------------------
> 1 file changed, 21 insertions(+), 34 deletions(-)
>
> diff --git a/drivers/media/platform/coda/coda-common.c
> b/drivers/media/platform/coda/coda-common.c
> index 0997b5c..ced4760 100644
> --- a/drivers/media/platform/coda/coda-common.c
> +++ b/drivers/media/platform/coda/coda-common.c
> @@ -1688,7 +1688,7 @@ static void coda_fw_callback(const struct firmware *fw,
> void *context)
>
> if (!fw) {
> v4l2_err(&dev->v4l2_dev, "firmware request failed\n");
> - return;
> + goto put_pm;
> }
>
> /* allocate auxiliary per-device code buffer for the BIT processor */
> @@ -1696,50 +1696,27 @@ static void coda_fw_callback(const struct firmware
> *fw, void *context)
> dev->debugfs_root);
> if (ret < 0) {
> dev_err(&pdev->dev, "failed to allocate code buffer\n");
> - return;
> + goto put_pm;
> }
>
> /* Copy the whole firmware image to the code buffer */
> memcpy(dev->codebuf.vaddr, fw->data, fw->size);
> release_firmware(fw);
>
> - if (pm_runtime_enabled(&pdev->dev) && pdev->dev.pm_domain) {
> - /*
> - * Enabling power temporarily will cause coda_hw_init to be
> - * called via coda_runtime_resume by the pm domain.
> - */
> - ret = pm_runtime_get_sync(&dev->plat_dev->dev);
> - if (ret < 0) {
> - v4l2_err(&dev->v4l2_dev, "failed to power on: %d\n",
> - ret);
> - return;
> - }
> -
> - ret = coda_check_firmware(dev);
> - if (ret < 0)
> - return;
> -
> - pm_runtime_put_sync(&dev->plat_dev->dev);
> - } else {
> - /*
> - * If runtime pm is disabled or pm_domain is not set,
> - * initialize once manually.
> - */
> - ret = coda_hw_init(dev);
> - if (ret < 0) {
> - v4l2_err(&dev->v4l2_dev, "HW initialization
> failed\n");
> - return;
> - }
> -
> - ret = coda_check_firmware(dev);
> - if (ret < 0)
> - return;
> + ret = coda_hw_init(dev);
> + if (ret < 0) {
> + v4l2_err(&dev->v4l2_dev, "HW initialization failed\n");
> + goto put_pm;
> }
>
> + ret = coda_check_firmware(dev);
> + if (ret < 0)
> + goto put_pm;
> +
> dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
> if (IS_ERR(dev->alloc_ctx)) {
> v4l2_err(&dev->v4l2_dev, "Failed to alloc vb2 context\n");
> - return;
> + goto put_pm;
> }
>
> dev->m2m_dev = v4l2_m2m_init(&coda_m2m_ops);
> @@ -1771,12 +1748,15 @@ static void coda_fw_callback(const struct firmware
> *fw, void *context)
> v4l2_info(&dev->v4l2_dev, "codec registered as /dev/video[%d-%d]\n",
> dev->vfd[0].num, dev->vfd[1].num);
>
> + pm_runtime_put_sync(&pdev->dev);
> return;
>
> rel_m2m:
> v4l2_m2m_release(dev->m2m_dev);
> rel_ctx:
> vb2_dma_contig_cleanup_ctx(dev->alloc_ctx);
> +put_pm:
> + pm_runtime_put_sync(&pdev->dev);
> }
>
> static int coda_firmware_request(struct coda_dev *dev)
> @@ -1998,6 +1978,13 @@ static int coda_probe(struct platform_device *pdev)
>
> platform_set_drvdata(pdev, dev);
>
> + /*
> + * Start activated so we can directly call coda_hw_init in
> + * coda_fw_callback regardless of whether CONFIG_PM_RUNTIME is
> + * enabled or whether the device is associated with a PM domain.
> + */
> + pm_runtime_get_noresume(&pdev->dev);
> + pm_runtime_set_active(&pdev->dev);
> pm_runtime_enable(&pdev->dev);
>
> return coda_firmware_request(dev);
> --
> 2.1.0
>
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