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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 16 Sep 2021 18:09:20 +0300
From:   Mikko Perttunen <mperttunen@...dia.com>
To:     thierry.reding@...il.com, jonathanh@...dia.com
Cc:     dri-devel@...ts.freedesktop.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Mikko Perttunen <mperttunen@...dia.com>
Subject: [PATCH] drm/tegra: Bump VIC/NVDEC clock rates to Fmax

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@...dia.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