From: Dmitry Osipenko digetx@gmail.com
[ Upstream commit 87f0e46e7559beb6f1d1ff99f8f48b1b9d86db52 ]
Reset hardware on RPM-resume in order to bring it into a predictable state.
Tested-by: Peter Geis pgwipeout@gmail.com # Ouya T30 audio works Tested-by: Matt Merhar mattmerhar@protonmail.com # Ouya T30 boot-tested Tested-by: Nicolas Chauvet kwizart@gmail.com # TK1 boot-tested Signed-off-by: Dmitry Osipenko digetx@gmail.com Link: https://lore.kernel.org/r/20210120003154.26749-3-digetx@gmail.com Signed-off-by: Takashi Iwai tiwai@suse.de Stable-dep-of: f89e409402e2 ("ALSA: hda: Fix Nvidia dp infoframe") Signed-off-by: Sasha Levin sashal@kernel.org --- sound/pci/hda/hda_tegra.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)
diff --git a/sound/pci/hda/hda_tegra.c b/sound/pci/hda/hda_tegra.c index 957a7a9aaab0..17b06f7b69ee 100644 --- a/sound/pci/hda/hda_tegra.c +++ b/sound/pci/hda/hda_tegra.c @@ -17,6 +17,7 @@ #include <linux/moduleparam.h> #include <linux/mutex.h> #include <linux/of_device.h> +#include <linux/reset.h> #include <linux/slab.h> #include <linux/time.h> #include <linux/string.h> @@ -70,6 +71,7 @@ struct hda_tegra { struct azx chip; struct device *dev; + struct reset_control *reset; struct clk_bulk_data clocks[3]; unsigned int nclocks; void __iomem *regs; @@ -167,6 +169,12 @@ static int __maybe_unused hda_tegra_runtime_resume(struct device *dev) struct hda_tegra *hda = container_of(chip, struct hda_tegra, chip); int rc;
+ if (!chip->running) { + rc = reset_control_assert(hda->reset); + if (rc) + return rc; + } + rc = clk_bulk_prepare_enable(hda->nclocks, hda->clocks); if (rc != 0) return rc; @@ -176,6 +184,12 @@ static int __maybe_unused hda_tegra_runtime_resume(struct device *dev) /* disable controller wake up event*/ azx_writew(chip, WAKEEN, azx_readw(chip, WAKEEN) & ~STATESTS_INT_MASK); + } else { + usleep_range(10, 100); + + rc = reset_control_deassert(hda->reset); + if (rc) + return rc; }
return 0; @@ -445,6 +459,12 @@ static int hda_tegra_probe(struct platform_device *pdev) return err; }
+ hda->reset = devm_reset_control_array_get_exclusive(&pdev->dev); + if (IS_ERR(hda->reset)) { + err = PTR_ERR(hda->reset); + goto out_free; + } + hda->clocks[hda->nclocks++].id = "hda"; hda->clocks[hda->nclocks++].id = "hda2hdmi"; hda->clocks[hda->nclocks++].id = "hda2codec_2x";