gpu: ipu-v3: only set non-zero AXI ID for IC when PRG is absent

Using non-zero AXI IDs for anything other than the display channels
collides with the PRG AXI snooping, so only do this if there is no
PRG present.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/gpu/ipu-v3/ipu-image-convert.c b/drivers/gpu/ipu-v3/ipu-image-convert.c
index 805b6fa7b5f4..524a717ab28e 100644
--- a/drivers/gpu/ipu-v3/ipu-image-convert.c
+++ b/drivers/gpu/ipu-v3/ipu-image-convert.c
@@ -671,7 +671,12 @@ static void init_idmac_channel(struct ipu_image_convert_ctx *ctx,
         ipu_ic_task_idma_init(chan->ic, channel, width, height,
                               burst_size, rot_mode);
 
-        ipu_cpmem_set_axi_id(channel, 1);
+        /*
+         * Setting a non-zero AXI ID collides with the PRG AXI snooping, so
+         * only do this when there is no PRG present.
+         */
+        if (!channel->ipu->prg_priv)
+                ipu_cpmem_set_axi_id(channel, 1);
 
         ipu_idmac_set_double_buffer(channel, ctx->double_buffering);
 }