openwrt/target/linux/bcm27xx/patches-5.10/950-0670-drm-vc4-hdmi-Add-missing-clk_disable_unprepare-on-er.patch

From 8865bc13c5e22daa653ce4c1c419a6efaa701dac Mon Sep 17 00:00:00 2001
From: Maxime Ripard <maxime@cerno.tech>
Date: Fri, 2 Jul 2021 17:44:56 +0200
Subject: [PATCH] drm/vc4: hdmi: Add missing clk_disable_unprepare on
 error path

In vc4_hdmi_encoder_pre_crtc_configure, if clk_request_start for the HSM
clock fails, we don't call clk_disable_unprepare on the pixel clock even
though it's enabled by now.

Make sure it's there to avoid leaking that reference.

Fixes: cd4cb49dc5bb ("drm/vc4: hdmi: Adjust HSM clock rate depending on pixel rate")
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 1 +
 1 file changed, 1 insertion(+)

--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -926,6 +926,7 @@ static void vc4_hdmi_encoder_pre_crtc_co
 	vc4_hdmi->hsm_req = clk_request_start(vc4_hdmi->hsm_clock, hsm_rate);
 	if (IS_ERR(vc4_hdmi->hsm_req)) {
 		DRM_ERROR("Failed to set HSM clock rate: %ld\n", PTR_ERR(vc4_hdmi->hsm_req));
+		clk_disable_unprepare(vc4_hdmi->pixel_clock);
 		pm_runtime_put(&vc4_hdmi->pdev->dev);
 		return;
 	}