[PATCH] drm/tegra: Bump VIC/NVDEC clock rates to Fmax

[PATCH] drm/tegra: Bump VIC/NVDEC clock rates to Fmax

[Mikko Perttunen]

To get full performance out of these engines, bump their clock rates
to maximum. In the future we may want something smarter but this
should be fine for now.

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
---
 drivers/gpu/drm/tegra/nvdec.c | 6 ++++++
 drivers/gpu/drm/tegra/vic.c   | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/drivers/gpu/drm/tegra/nvdec.c b/drivers/gpu/drm/tegra/nvdec.c
index c3b6fe7fb454..48c90e26e90a 100644
--- a/drivers/gpu/drm/tegra/nvdec.c
+++ b/drivers/gpu/drm/tegra/nvdec.c
@@ -374,6 +374,12 @@ static int nvdec_probe(struct platform_device *pdev)
 		return PTR_ERR(nvdec->clk);
 	}
 
+	err = clk_set_rate(nvdec->clk, ULONG_MAX);
+	if (err < 0) {
+		dev_err(&pdev->dev, "failed to set clock rate\n");
+		return err;
+	}
+
 	err = of_property_read_u32(dev->of_node, "nvidia,host1x-class", &host_class);
 	if (err < 0)
 		host_class = HOST1X_CLASS_NVDEC;
diff --git a/drivers/gpu/drm/tegra/vic.c b/drivers/gpu/drm/tegra/vic.c
index c02010ff2b7f..dec5e56f6780 100644
--- a/drivers/gpu/drm/tegra/vic.c
+++ b/drivers/gpu/drm/tegra/vic.c
@@ -441,6 +441,12 @@ static int vic_probe(struct platform_device *pdev)
 		return PTR_ERR(vic->clk);
 	}
 
+	err = clk_set_rate(vic->clk, ULONG_MAX);
+	if (err < 0) {
+		dev_err(&pdev->dev, "failed to set clock rate\n");
+		return err;
+	}
+
 	if (!dev->pm_domain) {
 		vic->rst = devm_reset_control_get(dev, "vic");
 		if (IS_ERR(vic->rst)) {
-- 
2.32.0

Re: [PATCH] drm/tegra: Bump VIC/NVDEC clock rates to Fmax

[Thierry Reding]

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On Thu, Sep 16, 2021 at 06:09:20PM +0300, Mikko Perttunen wrote:
> To get full performance out of these engines, bump their clock rates
> to maximum. In the future we may want something smarter but this
> should be fine for now.
> 
> Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
> ---
>  drivers/gpu/drm/tegra/nvdec.c | 6 ++++++
>  drivers/gpu/drm/tegra/vic.c   | 6 ++++++
>  2 files changed, 12 insertions(+)

Applied, thanks.

Thierry

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