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drm/stm: ltdc: disable all layers before crtc shutdown

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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>
Signed-off-by: Philippe Cornu <philippe.cornu@foss.st.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220603134151.591997-1-yannick.fertre@foss.st.com
This commit is contained in:
Yannick Fertre 2022-06-03 15:41:51 +02:00 committed by Philippe Cornu
parent 6fde8eec71
commit c4f218d46f
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/stm/ltdc.c
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@ -790,11 +790,17 @@ 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);