Since our pre_crtc_configure hook returned void, we didn't implement a goto-based error path handling, leading to errors like failing to put back the device in pm_runtime in all the error paths, but also failing to disable the pixel clock if clk_set_min_rate on the HSM clock fails.
Move to a goto-based implementation to have an easier consitency.
Fixes: 4f6e3d66ac52 ("drm/vc4: Add runtime PM support to the HDMI encoder driver") Reviewed-by: Dave Stevenson dave.stevenson@raspberrypi.com Signed-off-by: Maxime Ripard maxime@cerno.tech --- drivers/gpu/drm/vc4/vc4_hdmi.c | 21 ++++++++++++++------- 1 file changed, 14 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c index 5dde3e5c1d7f..8458f38e2883 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c @@ -913,13 +913,13 @@ static void vc4_hdmi_encoder_pre_crtc_configure(struct drm_encoder *encoder, ret = clk_set_rate(vc4_hdmi->pixel_clock, pixel_rate); if (ret) { DRM_ERROR("Failed to set pixel clock rate: %d\n", ret); - return; + goto err_put_runtime_pm; }
ret = clk_prepare_enable(vc4_hdmi->pixel_clock); if (ret) { DRM_ERROR("Failed to turn on pixel clock: %d\n", ret); - return; + goto err_put_runtime_pm; }
/* @@ -942,7 +942,7 @@ static void vc4_hdmi_encoder_pre_crtc_configure(struct drm_encoder *encoder, ret = clk_set_min_rate(vc4_hdmi->hsm_clock, hsm_rate); if (ret) { DRM_ERROR("Failed to set HSM clock rate: %d\n", ret); - return; + goto err_disable_pixel_clock; }
vc4_hdmi_cec_update_clk_div(vc4_hdmi); @@ -957,15 +957,13 @@ static void vc4_hdmi_encoder_pre_crtc_configure(struct drm_encoder *encoder, ret = clk_set_min_rate(vc4_hdmi->pixel_bvb_clock, bvb_rate); if (ret) { DRM_ERROR("Failed to set pixel bvb clock rate: %d\n", ret); - clk_disable_unprepare(vc4_hdmi->pixel_clock); - return; + goto err_disable_pixel_clock; }
ret = clk_prepare_enable(vc4_hdmi->pixel_bvb_clock); if (ret) { DRM_ERROR("Failed to turn on pixel bvb clock: %d\n", ret); - clk_disable_unprepare(vc4_hdmi->pixel_clock); - return; + goto err_disable_pixel_clock; }
if (vc4_hdmi->variant->phy_init) @@ -978,6 +976,15 @@ static void vc4_hdmi_encoder_pre_crtc_configure(struct drm_encoder *encoder,
if (vc4_hdmi->variant->set_timings) vc4_hdmi->variant->set_timings(vc4_hdmi, conn_state, mode); + + return; + +err_disable_pixel_clock: + clk_disable_unprepare(vc4_hdmi->pixel_clock); +err_put_runtime_pm: + pm_runtime_put(&vc4_hdmi->pdev->dev); + + return; }
static void vc4_hdmi_encoder_pre_crtc_enable(struct drm_encoder *encoder,