On 6/3/22 15:41, Yannick Fertre wrote:
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.fer...@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);

Dear Yannick,
Many thanks for your patch,
Applied on drm-misc-next.
Have a good day
Philippe :-)

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