diff options
Diffstat (limited to 'drivers/gpu/drm/kmb/kmb_drv.c')
| -rw-r--r-- | drivers/gpu/drm/kmb/kmb_drv.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/gpu/drm/kmb/kmb_drv.c b/drivers/gpu/drm/kmb/kmb_drv.c index 96ea1a2c11dd..c0b1c6f99249 100644 --- a/drivers/gpu/drm/kmb/kmb_drv.c +++ b/drivers/gpu/drm/kmb/kmb_drv.c @@ -203,6 +203,7 @@ static irqreturn_t handle_lcd_irq(struct drm_device *dev) unsigned long status, val, val1; int plane_id, dma0_state, dma1_state; struct kmb_drm_private *kmb = to_kmb(dev); + u32 ctrl = 0; status = kmb_read_lcd(kmb, LCD_INT_STATUS); @@ -227,6 +228,19 @@ static irqreturn_t handle_lcd_irq(struct drm_device *dev) kmb_clr_bitmask_lcd(kmb, LCD_CONTROL, kmb->plane_status[plane_id].ctrl); + ctrl = kmb_read_lcd(kmb, LCD_CONTROL); + if (!(ctrl & (LCD_CTRL_VL1_ENABLE | + LCD_CTRL_VL2_ENABLE | + LCD_CTRL_GL1_ENABLE | + LCD_CTRL_GL2_ENABLE))) { + /* If no LCD layers are using DMA, + * then disable DMA pipelined AXI read + * transactions. + */ + kmb_clr_bitmask_lcd(kmb, LCD_CONTROL, + LCD_CTRL_PIPELINE_DMA); + } + kmb->plane_status[plane_id].disable = false; } } |