From: Dmitry Osipenko <digetx@gmail.com>
Date: Mon, 29 Jun 2020 03:18:37 +0000 (+0300)
Subject: drm/tegra: gr3d: Assert reset before power-gating
X-Git-Tag: v5.15~3115^2~15^2~5
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2c2a291d01efdcf336796557de1f651b2581e08d;p=platform%2Fkernel%2Flinux-starfive.git

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 c0a528be..b0b8154 100644
--- 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);