Hi Christophe,
Le ven., mars 11 2022 at 18:02:37 +0100, Christophe Branchereau
<cbrancher...@gmail.com> a écrit :
This allows the CRTC to be enabled after panels have slept out,
and before their display is turned on, solving a graphical bug
on the newvision nv3502c
Signed-off-by: Christophe Branchereau <cbrancher...@gmail.com>
---
drivers/gpu/drm/ingenic/ingenic-drm-drv.c | 19 +++++++++++++------
1 file changed, 13 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
index dcf44cb00821..51512f41263e 100644
--- a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
+++ b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
@@ -226,6 +226,18 @@ static int ingenic_drm_update_pixclk(struct
notifier_block *nb,
}
}
+static void ingenic_drm_bridge_atomic_enable(struct drm_bridge
*bridge,
+ struct drm_bridge_state
*old_bridge_state)
+{
+ struct ingenic_drm *priv = drm_device_get_priv(bridge->dev);
+
+ regmap_write(priv->map, JZ_REG_LCD_STATE, 0);
+
+ regmap_update_bits(priv->map, JZ_REG_LCD_CTRL,
+ JZ_LCD_CTRL_ENABLE | JZ_LCD_CTRL_DISABLE,
+ JZ_LCD_CTRL_ENABLE);
+}
+
static void ingenic_drm_crtc_atomic_enable(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
@@ -237,17 +249,11 @@ static void
ingenic_drm_crtc_atomic_enable(struct drm_crtc *crtc,
if (WARN_ON(IS_ERR(priv_state)))
return;
- regmap_write(priv->map, JZ_REG_LCD_STATE, 0);
-
/* Set addresses of our DMA descriptor chains */
next_id = priv_state->use_palette ? HWDESC_PALETTE : 0;
regmap_write(priv->map, JZ_REG_LCD_DA0, dma_hwdesc_addr(priv,
next_id));
regmap_write(priv->map, JZ_REG_LCD_DA1, dma_hwdesc_addr(priv, 1));
- regmap_update_bits(priv->map, JZ_REG_LCD_CTRL,
- JZ_LCD_CTRL_ENABLE | JZ_LCD_CTRL_DISABLE,
- JZ_LCD_CTRL_ENABLE);
-
drm_crtc_vblank_on(crtc);
}
@@ -968,6 +974,7 @@ static const struct drm_encoder_helper_funcs
ingenic_drm_encoder_helper_funcs =
static const struct drm_bridge_funcs ingenic_drm_bridge_funcs = {
.attach = ingenic_drm_bridge_attach,
+ .atomic_enable = ingenic_drm_bridge_atomic_enable,
Shouldn't we have a .atomic_disable() as well? If the CRTC is now
enabled in the bridge's .atomic_enable, it would make sense to have it
disabled in the .atomic_disable().
Cheers,
-Paul
.atomic_check = ingenic_drm_bridge_atomic_check,
.atomic_reset = drm_atomic_helper_bridge_reset,
.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
--
2.35.1
