From c4f218d46fafd709df8e03c275c4d4ad6ebed019 Mon Sep 17 00:00:00 2001 From: Yannick Fertre Date: Fri, 3 Jun 2022 15:41:51 +0200 Subject: [PATCH] drm/stm: ltdc: disable all layers before crtc shutdown 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 Signed-off-by: Philippe Cornu Link: https://patchwork.freedesktop.org/patch/msgid/20220603134151.591997-1-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 76230f775081..0de65be9cd65 100644 --- a/drivers/gpu/drm/stm/ltdc.c +++ b/drivers/gpu/drm/stm/ltdc.c @@ -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); -- 2.34.1