drm/vc4: hdmi: Put the device on error in pre_crtc_configure

In the vc4_hdmi_encoder_pre_crtc_configure() function error path we
never actually call pm_runtime_put() even though
pm_runtime_resume_and_get() is our very first call.

Fixes: 4f6e3d6 ("drm/vc4: Add runtime PM support to the HDMI encoder driver")
Signed-off-by: Maxime Ripard <[email protected]>

Author: mripard

drivers/gpu/drm/vc4/vc4_hdmi.c

@@ -917,26 +917,30 @@ static void vc4_hdmi_encoder_pre_crtc_configure(struct drm_encoder *encoder,
 	ret = pm_runtime_resume_and_get(&vc4_hdmi->pdev->dev);
 	if (ret) {
 		DRM_ERROR("Failed to retain power domain: %d\n", ret);
+		pm_runtime_put(&vc4_hdmi->pdev->dev);
 		return;
 	}
 
 	pixel_rate = vc4_conn_state->pixel_rate;
 	ret = clk_set_rate(vc4_hdmi->pixel_clock, pixel_rate);
 	if (ret) {
 		DRM_ERROR("Failed to set pixel clock rate: %d\n", ret);
+		pm_runtime_put(&vc4_hdmi->pdev->dev);
 		return;
 	}
 
 	ret = clk_prepare_enable(vc4_hdmi->pixel_clock);
 	if (ret) {
 		DRM_ERROR("Failed to turn on pixel clock: %d\n", ret);
+		pm_runtime_put(&vc4_hdmi->pdev->dev);
 		return;
 	}
 
 	hsm_rate = vc4_hdmi->variant->calc_hsm_clock(vc4_hdmi, pixel_rate);
 	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));
+		pm_runtime_put(&vc4_hdmi->pdev->dev);
 		return;
 	}
 
@@ -955,6 +959,7 @@ static void vc4_hdmi_encoder_pre_crtc_configure(struct drm_encoder *encoder,
 		DRM_ERROR("Failed to set pixel bvb clock rate: %ld\n", PTR_ERR(vc4_hdmi->bvb_req));
 		clk_request_done(vc4_hdmi->hsm_req);
 		clk_disable_unprepare(vc4_hdmi->pixel_clock);
+		pm_runtime_put(&vc4_hdmi->pdev->dev);
 		return;
 	}
 
@@ -965,6 +970,7 @@ static void vc4_hdmi_encoder_pre_crtc_configure(struct drm_encoder *encoder,
 			clk_request_done(vc4_hdmi->bvb_req);
 		clk_request_done(vc4_hdmi->hsm_req);
 		clk_disable_unprepare(vc4_hdmi->pixel_clock);
+		pm_runtime_put(&vc4_hdmi->pdev->dev);
 		return;
 	}