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Subject[PATCH v4 11/11] drm/tegra: Reset the SOR on probe
Date
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 <tomeu.vizoso@collabora.com>
---
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


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