BackPup/Linux
1
0 Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-10-07 05:31:08 -04:00
Code Issues Packages Projects Releases Wiki Activity

drm/ingenic: Set DMA descriptor chain register when starting CRTC

Browse Source 
Setting the DMA descriptor chain register in the probe function has been
fine until now, because we only ever had one descriptor per foreground.

As the driver will soon have real descriptor chains, and the DMA
descriptor chain register updates itself to point to the current
descriptor being processed, this register needs to be reset after a full
modeset to point to the first descriptor of the chain.

Signed-off-by: Paul Cercueil <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Tested-by: Nikolaus Schaller <[email protected]>
Reviewed-by: Christophe Branchereau <[email protected]>
This commit is contained in:
Paul Cercueil committed 2021-10-29 21:30:07 +01:00
1 parent 9361329d57
commit 5410345f7a
1 file changed
+4
Download Patch File Download Diff File Expand all files Collapse all files
drivers/gpu/drm/ingenic/ingenic-drm-drv.c
+4
View File
@@ -186,6 +186,10 @@ static void ingenic_drm_crtc_atomic_enable(struct drm_crtc *crtc,
regmap_write(priv->map, JZ_REG_LCD_STATE, 0);
/* Set address of our DMA descriptor chain */
regmap_write(priv->map, JZ_REG_LCD_DA0, dma_hwdesc_addr(priv, 0));
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);