[PATCH v5 09/11] drm/tegra: Reset the SOR on probe
From: Tomeu Vizoso <hidden>
Date: 2015-02-12 08:53:42
Also in:
dri-devel, lkml
Subsystem:
drm drivers, drm drivers for nvidia tegra, the rest · Maintainers:
David Airlie, Simona Vetter, Thierry Reding, Mikko Perttunen, Linus Torvalds
As there isn't a way for the firmware on the Nyan chromebooks to hand over the display to the kernel. Signed-off-by: Tomeu Vizoso <redacted> --- drivers/gpu/drm/tegra/sor.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/drivers/gpu/drm/tegra/sor.c b/drivers/gpu/drm/tegra/sor.c
index 2afe478..e6caacc 100644
--- a/drivers/gpu/drm/tegra/sor.c
+++ b/drivers/gpu/drm/tegra/sor.c@@ -1458,6 +1458,20 @@ static int tegra_sor_probe(struct platform_device *pdev) mutex_init(&sor->lock); + err = reset_control_assert(sor->rst); + if (err < 0) { + dev_err(&pdev->dev, "failed to assert SOR reset: %d\n", err); + return err; + } + + msleep(20); + + err = reset_control_deassert(sor->rst); + if (err < 0) { + dev_err(&pdev->dev, "failed to deassert SOR reset: %d\n", err); + return err; + } + err = host1x_client_register(&sor->client); if (err < 0) { dev_err(&pdev->dev, "failed to register host1x client: %d\n",
--
1.9.3