[PATCH 5.16 0091/1039] drm/rockchip: dsi: Disable PLL clock on bind error

[Greg Kroah-Hartman]

From: Brian Norris <briannorris@xxxxxxxxxxxx>

[ Upstream commit 5a614570172e1c9f59035d259dd735acd4f1c01b ]

Fix some error handling here noticed in review of other changes.

Fixes: 2d4f7bdafd70 ("drm/rockchip: dsi: migrate to use dw-mipi-dsi bridge driver")
Signed-off-by: Brian Norris <briannorris@xxxxxxxxxxxx>
Reported-by: Chen-Yu Tsai <wenst@xxxxxxxxxxxx>
Reviewed-by: Chen-Yu Tsai <wenst@xxxxxxxxxxxx>
Tested-by: Nícolas F. R. A. Prado <nfraprado@xxxxxxxxxxxxx>
Signed-off-by: Heiko Stuebner <heiko@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20210928143413.v3.4.I8bb7a91ecc411d56bc155763faa15f289d7fc074@changeid
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
@@ -944,7 +944,7 @@ static int dw_mipi_dsi_rockchip_bind(str
 	ret = clk_prepare_enable(dsi->grf_clk);
 	if (ret) {
 		DRM_DEV_ERROR(dsi->dev, "Failed to enable grf_clk: %d\n", ret);
-		goto out_pm_runtime;
+		goto out_pll_clk;
 	}
 
 	dw_mipi_dsi_rockchip_config(dsi);
@@ -956,19 +956,21 @@ static int dw_mipi_dsi_rockchip_bind(str
 	ret = rockchip_dsi_drm_create_encoder(dsi, drm_dev);
 	if (ret) {
 		DRM_DEV_ERROR(dev, "Failed to create drm encoder\n");
-		goto out_pm_runtime;
+		goto out_pll_clk;
 	}
 
 	ret = dw_mipi_dsi_bind(dsi->dmd, &dsi->encoder);
 	if (ret) {
 		DRM_DEV_ERROR(dev, "Failed to bind: %d\n", ret);
-		goto out_pm_runtime;
+		goto out_pll_clk;
 	}
 
 	dsi->dsi_bound = true;
 
 	return 0;
 
+out_pll_clk:
+	clk_disable_unprepare(dsi->pllref_clk);
 out_pm_runtime:
 	pm_runtime_put(dsi->dev);
 	if (dsi->slave)