[PATCH v12 24/35] media: staging: tegra-vde: Support generic power domain

Dmitry Osipenko
2021-09-21T02:46:06Z

Currently driver supports legacy power domain API, this patch adds generic
power domain support. This allows us to utilize a modern GENPD API for
newer device-trees.

Tested-by: Peter Geis <pgwipeout@gmail.com> # Ouya T30
Tested-by: Paul Fertser <fercerpav@gmail.com> # PAZ00 T20
Tested-by: Nicolas Chauvet <kwizart@gmail.com> # PAZ00 T20 and TK1 T124
Tested-by: Matt Merhar <mattmerhar@protonmail.com> # Ouya T30
Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
drivers/staging/media/tegra-vde/vde.c | 57 +++++++++++++++++++++------
1 file changed, 46 insertions(+), 11 deletions(-)

diff --git a/drivers/staging/media/tegra-vde/vde.c b/drivers/staging/media/tegra-vde/vde.c
index ed4c1250b303..bb3079a2c0b5 100644
--- a/drivers/staging/media/tegra-vde/vde.c
+++ b/drivers/staging/media/tegra-vde/vde.c
@@ -20,6 +20,7 @@
#include <linux/slab.h>
#include <linux/uaccess.h>

+#include <soc/tegra/common.h>
#include <soc/tegra/pmc.h>

#include "uapi.h"
@@ -920,13 +921,17 @@ static __maybe_unused int tegra_vde_runtime_suspend(struct device *dev)
struct tegra_vde *vde = dev_get_drvdata(dev);
int err;

- err = tegra_powergate_power_off(TEGRA_POWERGATE_VDEC);
- if (err) {
- dev_err(dev, "Failed to power down HW: %d\n", err);
- return err;
+ if (!dev->pm_domain) {
+ err = tegra_powergate_power_off(TEGRA_POWERGATE_VDEC);
+ if (err) {
+ dev_err(dev, "Failed to power down HW: %d\n", err);
+ return err;
+ }
}

clk_disable_unprepare(vde->clk);
+ reset_control_release(vde->rst);
+ reset_control_release(vde->rst_mc);

return 0;
}
@@ -936,14 +941,41 @@ static __maybe_unused int tegra_vde_runtime_resume(struct device *dev)
struct tegra_vde *vde = dev_get_drvdata(dev);
int err;

- err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_VDEC,
- vde->clk, vde->rst);
+ err = reset_control_acquire(vde->rst_mc);
if (err) {
- dev_err(dev, "Failed to power up HW : %d\n", err);
+ dev_err(dev, "Failed to acquire mc reset: %d\n", err);
return err;
}

+ err = reset_control_acquire(vde->rst);
+ if (err) {
+ dev_err(dev, "Failed to acquire reset: %d\n", err);
+ goto release_mc_reset;
+ }
+
+ if (!dev->pm_domain) {
+ err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_VDEC,
+ vde->clk, vde->rst);
+ if (err) {
+ dev_err(dev, "Failed to power up HW : %d\n", err);
+ goto release_reset;
+ }
+ }
+
+ err = clk_prepare_enable(vde->clk);
+ if (err) {
+ dev_err(dev, "Failed to enable clock: %d\n", err);
+ goto release_reset;
+ }
+
return 0;
+
+release_reset:
+ reset_control_release(vde->rst);
+release_mc_reset:
+ reset_control_release(vde->rst_mc);
+
+ return err;
}

static int tegra_vde_probe(struct platform_device *pdev)
@@ -1001,14 +1033,14 @@ static int tegra_vde_probe(struct platform_device *pdev)
return err;
}

- vde->rst = devm_reset_control_get(dev, NULL);
+ vde->rst = devm_reset_control_get_exclusive_released(dev, NULL);
if (IS_ERR(vde->rst)) {
err = PTR_ERR(vde->rst);
dev_err(dev, "Could not get VDE reset %d\n", err);
return err;
}

- vde->rst_mc = devm_reset_control_get_optional(dev, "mc");
+ vde->rst_mc = devm_reset_control_get_optional_exclusive_released(dev, "mc");
if (IS_ERR(vde->rst_mc)) {
err = PTR_ERR(vde->rst_mc);
dev_err(dev, "Could not get MC reset %d\n", err);
@@ -1066,6 +1098,10 @@ static int tegra_vde_probe(struct platform_device *pdev)
pm_runtime_use_autosuspend(dev);
pm_runtime_set_autosuspend_delay(dev, 300);

+ err = devm_tegra_core_dev_init_opp_table_common(dev);
+ if (err)
+ goto err_pm_runtime;
+
/*
* VDE partition may be left ON after bootloader, hence let's
* power-cycle it in order to put hardware into a predictable lower
@@ -1133,8 +1169,7 @@ static void tegra_vde_shutdown(struct platform_device *pdev)
* On some devices bootloader isn't ready to a power-gated VDE on
* a warm-reboot, machine will hang in that case.
*/
- if (pm_runtime_status_suspended(&pdev->dev))
- tegra_vde_runtime_resume(&pdev->dev);
+ pm_runtime_get_sync(&pdev->dev);
}

static __maybe_unused int tegra_vde_pm_suspend(struct device *dev)
--
2.32.0