drm/armada: clear plane enable bit when disabling

Clear the plane enable bit in the software state within
armada_drm_plane_disable() when disabling either the primary or
overlay planes.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

drivers/gpu/drm/armada/armada_crtc.c

@@ -1128,7 +1128,7 @@ int armada_drm_plane_disable(struct drm_plane *plane,
 {
 	struct armada_plane *dplane = drm_to_armada_plane(plane);
 	struct armada_crtc *dcrtc;
-	u32 sram_para1, dma_ctrl0_mask;
+	u32 sram_para1, enable_mask;
 
 	if (!plane->crtc)
 		return 0;
@@ -1147,13 +1147,15 @@ int armada_drm_plane_disable(struct drm_plane *plane,
 	if (plane->type == DRM_PLANE_TYPE_PRIMARY) {
 		sram_para1 = CFG_PDWN256x32 | CFG_PDWN256x24 | CFG_PDWN256x8 |
 			     CFG_PDWN32x32 | CFG_PDWN64x66;
-		dma_ctrl0_mask = CFG_GRA_ENA;
+		enable_mask = CFG_GRA_ENA;
 	} else {
 		/* Power down the Y/U/V FIFOs */
 		sram_para1 = CFG_PDWN16x66 | CFG_PDWN32x66;
-		dma_ctrl0_mask = CFG_DMA_ENA;
+		enable_mask = CFG_DMA_ENA;
 	}
 
+	dplane->state.ctrl0 &= ~enable_mask;
+
 	dcrtc = drm_to_armada_crtc(plane->crtc);
 
 	/* Wait for any preceding work to complete, but don't wedge */
@@ -1161,7 +1163,7 @@ int armada_drm_plane_disable(struct drm_plane *plane,
 		armada_drm_plane_work_cancel(dcrtc, dplane);
 
 	spin_lock_irq(&dcrtc->irq_lock);
-	armada_updatel(0, dma_ctrl0_mask, dcrtc->base + LCD_SPU_DMA_CTRL0);
+	armada_updatel(0, enable_mask, dcrtc->base + LCD_SPU_DMA_CTRL0);
 	spin_unlock_irq(&dcrtc->irq_lock);
 
 	armada_updatel(sram_para1, 0, dcrtc->base + LCD_SPU_SRAM_PARA1);

drivers/gpu/drm/armada/armada_overlay.c

@@ -270,8 +270,6 @@ static int armada_ovl_plane_disable(struct drm_plane *plane,
 	if (dplane->base.base.crtc)
 		drm_to_armada_crtc(dplane->base.base.crtc)->plane = NULL;
 
-	dplane->base.state.ctrl0 = 0;
-
 	fb = xchg(&dplane->old_fb, NULL);
 	if (fb)
 		drm_framebuffer_put(fb);