V4L/DVB (6306): Few clenups for saa7134 resume code

*Disable DMA explictly on suspend
*Enable DMA on resume, after all buffers were configured
*Disable overlay on resume - apps should enable it when X is resumed

Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

3 files changed, 22 insertions, 20 deletions

diff --git a/drivers/media/video/saa7134/saa7134-core.c b/drivers/media/video/saa7134/saa7134-core.c
index fae0bfe7939f..80f04f252fce 100644
--- a/drivers/media/video/saa7134/saa7134-core.c
+++ b/drivers/media/video/saa7134/saa7134-core.c
@@ -398,29 +398,23 @@ void saa7134_buffer_timeout(unsigned long data)
 int saa7134_buffer_requeue(struct saa7134_dev *dev,
                          struct saa7134_dmaqueue *q)
 {
-        struct saa7134_buf *buf , *next;
-        unsigned long flags;
+        struct saa7134_buf *buf, *next;
 
-        spin_lock_irqsave(&dev->slock, flags);
+        assert_spin_locked(&dev->slock);
 
         buf  = q->curr;
         next = buf;
-
         dprintk("buffer_requeue\n");
 
-        if (!buf) {
-                spin_unlock_irqrestore(&dev->slock, flags);
+        if (!buf)
                 return 0;
-        }
 
         dprintk("buffer_requeue : resending active buffers \n");
 
         if (!list_empty(&q->queue))
                 next = list_entry(q->queue.next, struct saa7134_buf,
                                           vb.queue);
-
         buf->activate(dev, buf, next);
-        spin_unlock_irqrestore(&dev->slock, flags);
 
         return 0;
 }
@@ -435,6 +429,9 @@ int saa7134_set_dmabits(struct saa7134_dev *dev)
 
         assert_spin_locked(&dev->slock);
 
+        if (dev->inresume)
+                return 0;
+
         /* video capture -- dma 0 + video task A */
         if (dev->video_q.curr) {
                 task |= 0x01;
@@ -1175,13 +1172,15 @@ static void __devexit saa7134_finidev(struct pci_dev *pci_dev)
 static int saa7134_suspend(struct pci_dev *pci_dev , pm_message_t state)
 {
 
-        /* Disable card's IRQs to prevent it from resuming computer */
-
         struct saa7134_dev *dev = pci_get_drvdata(pci_dev);
 
+        /* disable overlay - apps should enable it explicitly on resume*/
+        dev->ovenable = 0;
+
+        /* Disable interrupts, DMA, and rest of the chip*/
         saa_writel(SAA7134_IRQ1, 0);
         saa_writel(SAA7134_IRQ2, 0);
-
+        saa_writel(SAA7134_MAIN_CTRL, 0);
 
         pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
         pci_save_state(pci_dev);
@@ -1193,6 +1192,7 @@ static int saa7134_resume(struct pci_dev *pci_dev)
 {
 
         struct saa7134_dev *dev = pci_get_drvdata(pci_dev);
+        unsigned int flags;
 
         pci_restore_state(pci_dev);
         pci_set_power_state(pci_dev, PCI_D0);
@@ -1200,6 +1200,7 @@ static int saa7134_resume(struct pci_dev *pci_dev)
         /* Do things that are done in saa7134_initdev ,
                 except of initializing memory structures.*/
 
+        dev->inresume = 1;
         saa7134_board_init1(dev);
 
         if (saa7134_boards[dev->board].video_out)
@@ -1209,25 +1210,26 @@ static int saa7134_resume(struct pci_dev *pci_dev)
                 saa7134_ts_init_hw(dev);
 
         saa7134_hw_enable1(dev);
-
         saa7134_set_decoder(dev);
-
         saa7134_i2c_call_clients(dev, VIDIOC_S_STD, &dev->tvnorm->id);
-
         saa7134_board_init2(dev);
         saa7134_hw_enable2(dev);
 
-        dev->force_mute_update = 1;
         saa7134_tvaudio_setmute(dev);
-        dev->force_mute_update = 0;
         saa7134_tvaudio_setvolume(dev, dev->ctl_volume);
         saa7134_enable_i2s(dev);
 
-        /*recapture unfinished buffer(s)*/
+        /*resume unfinished buffer(s)*/
+        spin_lock_irqsave(&dev->slock, flags);
         saa7134_buffer_requeue(dev, &dev->video_q);
         saa7134_buffer_requeue(dev, &dev->vbi_q);
         saa7134_buffer_requeue(dev, &dev->ts_q);
 
+        /* start DMA now*/
+        dev->inresume = 0;
+        saa7134_set_dmabits(dev);
+        spin_unlock_irqrestore(&dev->slock, flags);
+
         return 0;
 }
 
diff --git a/drivers/media/video/saa7134/saa7134-tvaudio.c b/drivers/media/video/saa7134/saa7134-tvaudio.c
index df2dab06387d..1b9e39a5ea47 100644
--- a/drivers/media/video/saa7134/saa7134-tvaudio.c
+++ b/drivers/media/video/saa7134/saa7134-tvaudio.c
@@ -231,7 +231,7 @@ static void mute_input_7134(struct saa7134_dev *dev)
         }
 
         if (dev->hw_mute  == mute &&
-                dev->hw_input == in && !dev->force_mute_update) {
+                dev->hw_input == in && !dev->inresume) {
                 dprintk("mute/input: nothing to do [mute=%d,input=%s]\n",
                         mute,in->name);
                 return;
diff --git a/drivers/media/video/saa7134/saa7134.h b/drivers/media/video/saa7134/saa7134.h
index 064f3dbe6951..28ec6804bd5d 100644
--- a/drivers/media/video/saa7134/saa7134.h
+++ b/drivers/media/video/saa7134/saa7134.h
@@ -522,9 +522,9 @@ struct saa7134_dev {
         struct saa7134_input       *input;
         struct saa7134_input       *hw_input;
         unsigned int               hw_mute;
-        unsigned int               force_mute_update;
         int                        last_carrier;
         int                        nosignal;
+        unsigned int               inresume;
 
         /* SAA7134_MPEG_* */
         struct saa7134_ts          ts;