All plans must be disabled before the CRTC shutdown helping the crtc to restart from a clean situation (without unwanted planes already enable).

Signed-off-by: Yannick Fertre yannick.fertre@foss.st.com --- drivers/gpu/drm/stm/ltdc.c | 6 ++++++ 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c index 6bd45df8f5a7..eeefc3260c07 100644 --- a/drivers/gpu/drm/stm/ltdc.c +++ b/drivers/gpu/drm/stm/ltdc.c @@ -787,11 +787,17 @@ static void ltdc_crtc_atomic_disable(struct drm_crtc *crtc, { struct ltdc_device *ldev = crtc_to_ltdc(crtc); struct drm_device *ddev = crtc->dev; + int layer_index = 0;

DRM_DEBUG_DRIVER("\n");

drm_crtc_vblank_off(crtc);

+ /* Disable all layers */ + for (layer_index = 0; layer_index < ldev->caps.nb_layers; layer_index++) + regmap_write_bits(ldev->regmap, LTDC_L1CR + layer_index * LAY_OFS, + LXCR_CLUTEN | LXCR_LEN, 0); + /* disable IRQ */ regmap_clear_bits(ldev->regmap, LTDC_IER, IER_RRIE | IER_FUIE | IER_TERRIE);