From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sameer Pujar Subject: [PATCH 1/7] ALSA: hda/tegra: runtime power management support Date: Mon, 21 Jan 2019 23:11:31 +0530 Message-ID: <1548092497-5459-2-git-send-email-spujar@nvidia.com> References: <1548092497-5459-1-git-send-email-spujar@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from hqemgate14.nvidia.com (hqemgate14.nvidia.com [216.228.121.143]) by alsa0.perex.cz (Postfix) with ESMTP id 6FAB326680F for ; Mon, 21 Jan 2019 18:41:48 +0100 (CET) In-Reply-To: <1548092497-5459-1-git-send-email-spujar@nvidia.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: perex@perex.cz, tiwai@suse.com, broonie@kernel.org Cc: alsa-devel@alsa-project.org, Sameer Pujar List-Id: alsa-devel@alsa-project.org This patch enables runtime power management(runtime PM) support for hda. pm_runtime_enable() and pm_runtime_disable() are added during device probe and remove respectively. The runtime PM callbacks will be forbidden if hda controller does not have support for runtime PM. pm_runtime_get_sync() and pm_runtime_put() are added for hda register access. The callbacks for above will be added in subsequent patches. Signed-off-by: Sameer Pujar Reviewed-by: Ravindra Lokhande Reviewed-by: Mohan Kumar D --- sound/pci/hda/hda_tegra.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/sound/pci/hda/hda_tegra.c b/sound/pci/hda/hda_tegra.c index 97a176d..2f9dd23 100644 --- a/sound/pci/hda/hda_tegra.c +++ b/sound/pci/hda/hda_tegra.c @@ -32,6 +32,7 @@ #include #include #include +#include #include #include @@ -512,6 +513,11 @@ static int hda_tegra_probe(struct platform_device *pdev) card->private_data = chip; dev_set_drvdata(&pdev->dev, card); + + pm_runtime_enable(hda->dev); + if (!azx_has_pm_runtime(chip)) + pm_runtime_forbid(hda->dev); + schedule_work(&hda->probe_work); return 0; @@ -528,6 +534,7 @@ static void hda_tegra_probe_work(struct work_struct *work) struct platform_device *pdev = to_platform_device(hda->dev); int err; + pm_runtime_get_sync(hda->dev); err = hda_tegra_first_init(chip, pdev); if (err < 0) goto out_free; @@ -549,12 +556,18 @@ static void hda_tegra_probe_work(struct work_struct *work) snd_hda_set_power_save(&chip->bus, power_save * 1000); out_free: + pm_runtime_put(hda->dev); return; /* no error return from async probe */ } static int hda_tegra_remove(struct platform_device *pdev) { - return snd_card_free(dev_get_drvdata(&pdev->dev)); + int ret; + + ret = snd_card_free(dev_get_drvdata(&pdev->dev)); + pm_runtime_disable(&pdev->dev); + + return ret; } static void hda_tegra_shutdown(struct platform_device *pdev) -- 2.7.4 ----------------------------------------------------------------------------------- This email message is for the sole use of the intended recipient(s) and may contain confidential information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply email and destroy all copies of the original message. -----------------------------------------------------------------------------------