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via: some PCI posting flushes

Signed-off-by: Dave Airlie <airlied@linux.ie>
Thomas Hellstrom 18 år sedan
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76f625511e
2 ändrade filer med 5 tillägg och 1 borttagningar
  1. 3 1
      drivers/char/drm/via_dma.c
  2. 2 0
      drivers/char/drm/via_dmablit.c

+ 3 - 1
drivers/char/drm/via_dma.c

@@ -480,6 +480,7 @@ static int via_hook_segment(drm_via_private_t * dev_priv,
 			VIA_WRITE(VIA_REG_TRANSET, (HC_ParaType_PreCR << 16));
 			VIA_WRITE(VIA_REG_TRANSPACE, pause_addr_hi);
 			VIA_WRITE(VIA_REG_TRANSPACE, pause_addr_lo);
+			VIA_READ(VIA_REG_TRANSPACE);
 		}
 	}
 	return paused;
@@ -557,8 +558,9 @@ static void via_cmdbuf_start(drm_via_private_t * dev_priv)
 
 	VIA_WRITE(VIA_REG_TRANSPACE, pause_addr_hi);
 	VIA_WRITE(VIA_REG_TRANSPACE, pause_addr_lo);
-
+	DRM_WRITEMEMORYBARRIER();
 	VIA_WRITE(VIA_REG_TRANSPACE, command | HC_HAGPCMNT_MASK);
+	VIA_READ(VIA_REG_TRANSPACE);
 }
 
 static void via_pad_cache(drm_via_private_t * dev_priv, int qwords)

+ 2 - 0
drivers/char/drm/via_dmablit.c

@@ -218,7 +218,9 @@ via_fire_dmablit(drm_device_t *dev, drm_via_sg_info_t *vsg, int engine)
 	VIA_WRITE(VIA_PCI_DMA_MR0  + engine*0x04, VIA_DMA_MR_CM | VIA_DMA_MR_TDIE);
 	VIA_WRITE(VIA_PCI_DMA_BCR0 + engine*0x10, 0);
 	VIA_WRITE(VIA_PCI_DMA_DPR0 + engine*0x10, vsg->chain_start);
+	DRM_WRITEMEMORYBARRIER();
 	VIA_WRITE(VIA_PCI_DMA_CSR0 + engine*0x04, VIA_DMA_CSR_DE | VIA_DMA_CSR_TS);
+	VIA_READ(VIA_PCI_DMA_CSR0 + engine*0x04);
 }
 
 /*