powerpc/ps3: Replace the flip_ctl logic in ps3av and ps3fb by a mutex

Introduce ps3_gpu_mutex to synchronizes GPU-related operations, like:
  - invoking the L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT command using the
    lv1_gpu_context_attribute() hypervisor call,
  - handling the PS3AV_CID_AVB_PARAM packet in the PS3 A/V Settings driver.

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 5 insertions, 12 deletions

diff --git a/drivers/video/ps3fb.c b/drivers/video/ps3fb.c
index 4b5d80771904..bd3e39baf7d2 100644
--- a/drivers/video/ps3fb.c
+++ b/drivers/video/ps3fb.c
@@ -460,12 +460,16 @@ static void ps3fb_sync_image(struct device *dev, u64 frame_offset,
                 line_length |= (u64)src_line_length << 32;
 
         src_offset += GPU_FB_START;
+
+        mutex_lock(&ps3_gpu_mutex);
         status = lv1_gpu_context_attribute(ps3fb.context_handle,
                                            L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT,
                                            dst_offset, GPU_IOIF + src_offset,
                                            L1GPU_FB_BLIT_WAIT_FOR_COMPLETION |
                                            (width << 16) | height,
                                            line_length);
+        mutex_unlock(&ps3_gpu_mutex);
+
         if (status)
                 dev_err(dev,
                         "%s: lv1_gpu_context_attribute FB_BLIT failed: %d\n",
@@ -784,15 +788,6 @@ static int ps3fb_wait_for_vsync(u32 crtc)
         return 0;
 }
 
-static void ps3fb_flip_ctl(int on, void *data)
-{
-        struct ps3fb_priv *priv = data;
-        if (on)
-                atomic_dec_if_positive(&priv->ext_flip);
-        else
-                atomic_inc(&priv->ext_flip);
-}
-
 
     /*
      * ioctl
@@ -1228,7 +1223,6 @@ static int __devinit ps3fb_probe(struct ps3_system_bus_device *dev)
         }
 
         ps3fb.task = task;
-        ps3av_register_flip_ctl(ps3fb_flip_ctl, &ps3fb);
 
         return 0;
 
@@ -1258,10 +1252,9 @@ static int ps3fb_shutdown(struct ps3_system_bus_device *dev)
 
         dev_dbg(&dev->core, " -> %s:%d\n", __func__, __LINE__);
 
-        ps3fb_flip_ctl(0, &ps3fb);      /* flip off */
+        atomic_inc(&ps3fb.ext_flip);    /* flip off */
         ps3fb.dinfo->irq.mask = 0;
 
-        ps3av_register_flip_ctl(NULL, NULL);
         if (ps3fb.task) {
                 struct task_struct *task = ps3fb.task;
                 ps3fb.task = NULL;