[PATCH v5 09/11] drm/tegra: Reset the SOR on probe

[Tomeu Vizoso]

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 at 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