drm/tegra: gr3d: Assert reset before power-gating

Tegra TRM documentation states that hardware should be in a default state
when power partition is turned off, i.e. reset should be asserted. This
patch adds the missing reset assertions.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

diff --git a/drivers/gpu/drm/tegra/gr3d.c b/drivers/gpu/drm/tegra/gr3d.c
index c0a528b..b0b8154 100644 (file)
--- a/drivers/gpu/drm/tegra/gr3d.c
+++ b/drivers/gpu/drm/tegra/gr3d.c
@@ -381,10 +381,12 @@ static int gr3d_remove(struct platform_device *pdev)
        }
 
        if (gr3d->clk_secondary) {
+               reset_control_assert(gr3d->rst_secondary);
                tegra_powergate_power_off(TEGRA_POWERGATE_3D1);
                clk_disable_unprepare(gr3d->clk_secondary);
        }
 
+       reset_control_assert(gr3d->rst);
        tegra_powergate_power_off(TEGRA_POWERGATE_3D);
        clk_disable_unprepare(gr3d->clk);