From: Dmitry Osipenko <digetx@gmail.com>
To: Thierry Reding <thierry.reding@gmail.com>,
Jonathan Hunter <jonathanh@nvidia.com>,
Sameer Pujar <spujar@nvidia.com>,
Peter Geis <pgwipeout@gmail.com>,
Nicolas Chauvet <kwizart@gmail.com>,
Takashi Iwai <tiwai@suse.com>, Jaroslav Kysela <perex@perex.cz>
Cc: alsa-devel@alsa-project.org, linux-tegra@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v1 2/5] ALSA: hda/tegra: Reset hardware
Date: Tue, 12 Jan 2021 15:58:31 +0300 [thread overview]
Message-ID: <20210112125834.21545-3-digetx@gmail.com> (raw)
In-Reply-To: <20210112125834.21545-1-digetx@gmail.com>
Reset hardware in order to bring it into a predictable state.
Tested-by: Peter Geis <pgwipeout@gmail.com>
Tested-by: Nicolas Chauvet <kwizart@gmail.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
sound/pci/hda/hda_tegra.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/sound/pci/hda/hda_tegra.c b/sound/pci/hda/hda_tegra.c
index 4c799661c2f6..e406b7980f31 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 && 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 +184,10 @@ 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 {
+ rc = reset_control_reset(hda->reset);
+ if (rc)
+ return rc;
}
return 0;
@@ -441,6 +453,12 @@ 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";
--
2.29.2
next prev parent reply other threads:[~2021-01-12 13:00 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-12 12:58 [PATCH v1 0/5] Clock and reset improvements for Tegra ALSA drivers Dmitry Osipenko
2021-01-12 12:58 ` [PATCH v1 1/5] ALSA: hda/tegra: Use clk_bulk helpers Dmitry Osipenko
2021-01-15 15:22 ` Thierry Reding
2021-01-17 23:31 ` Dmitry Osipenko
2021-01-19 17:31 ` Thierry Reding
2021-01-12 12:58 ` Dmitry Osipenko [this message]
2021-01-15 15:35 ` [PATCH v1 2/5] ALSA: hda/tegra: Reset hardware Thierry Reding
2021-01-17 23:39 ` Dmitry Osipenko
2021-01-19 17:30 ` Thierry Reding
2021-01-12 12:58 ` [PATCH v1 3/5] ASoC: tegra: ahub: Use of_reset_control_array_get_exclusive() Dmitry Osipenko
2021-01-15 15:37 ` Thierry Reding
2021-01-17 23:57 ` Dmitry Osipenko
2021-01-12 12:58 ` [PATCH v1 4/5] ASoC: tegra: ahub: Use clk_bulk helpers Dmitry Osipenko
2021-01-15 15:38 ` Thierry Reding
2021-01-12 12:58 ` [PATCH v1 5/5] ASoC: tegra: ahub: Reset hardware properly Dmitry Osipenko
2021-01-15 13:02 ` Dmitry Osipenko
2021-01-15 15:44 ` Thierry Reding
2021-01-18 0:02 ` Dmitry Osipenko
2021-01-19 17:34 ` Thierry Reding
2021-01-15 10:18 ` [PATCH v1 0/5] Clock and reset improvements for Tegra ALSA drivers Takashi Iwai
2021-01-15 10:52 ` Ben Dooks
2021-01-15 12:59 ` Dmitry Osipenko
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