drm/nouveau/tegra: Set clock rate if not set (fc12262b) · Commits · 戴 / test

If the GPU clock has not had a rate set, initialize it to the maximum clock rate to make sure it does run. Signed-off-by:

drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c

+12 −0

Original line number	Diff line number	Diff line
		@@ -279,6 +279,7 @@ nvkm_device_tegra_new(const struct nvkm_device_tegra_func *func,
		struct nvkm_device **pdevice)
		{
		struct nvkm_device_tegra *tdev;
		unsigned long rate;
		int ret;

		if (!(tdev = kzalloc(sizeof(*tdev), GFP_KERNEL)))
		@@ -307,6 +308,17 @@ nvkm_device_tegra_new(const struct nvkm_device_tegra_func *func,
		goto free;
		}

		rate = clk_get_rate(tdev->clk);
		if (rate == 0) {
		ret = clk_set_rate(tdev->clk, ULONG_MAX);
		if (ret < 0)
		goto free;

		rate = clk_get_rate(tdev->clk);

		dev_dbg(&pdev->dev, "GPU clock set to %lu\n", rate);
		}

		if (func->require_ref_clk)
		tdev->clk_ref = devm_clk_get(&pdev->dev, "ref");
		if (IS_ERR(tdev->clk_ref)) {