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[media] davinci: vpif: add check for genuine interrupts in the isr

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As the same interrupt is shared between capture and display devices,
sometimes we get isr calls where the interrupt might not genuinely belong
to capture or display. Hence, add a condition in the isr to check for
interrupt ownership and channel number to make sure we do not
service wrong interrupts.

Signed-off-by: Manjunath Hadli <manjunath.hadli@ti.com>
Signed-off-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Manjunath Hadli 2012-04-13 04:43:10 -03:00 committed by Mauro Carvalho Chehab
parent 4099040eaa
commit b1fc42302b
3 changed files with 21 additions and 0 deletions
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15
drivers/media/video/davinci/vpif.h
View File

@ -569,6 +569,21 @@ static inline void ch3_set_vbi_addr(unsigned long top_strt_luma,
regw(btm_strt_luma, VPIF_CH3_BTM_STRT_ADD_VANC);
}
static inline int vpif_intr_status(int channel)
{
int status = 0;
int mask;
if (channel < 0 || channel > 3)
return 0;
mask = 1 << channel;
status = regr(VPIF_STATUS) & mask;
regw(status, VPIF_STATUS_CLR);
return status;
}
#define VPIF_MAX_NAME (30)
/* This structure will store size parameters as per the mode selected by user */

3
drivers/media/video/davinci/vpif_capture.c
View File

@ -341,6 +341,9 @@ static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
int fid = -1, i;
channel_id = *(int *)(dev_id);
if (!vpif_intr_status(channel_id))
return IRQ_NONE;
ch = dev->dev[channel_id];
field = ch->common[VPIF_VIDEO_INDEX].fmt.fmt.pix.field;

3
drivers/media/video/davinci/vpif_display.c
View File

@ -307,6 +307,9 @@ static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
int channel_id = 0;
channel_id = *(int *)(dev_id);
if (!vpif_intr_status(channel_id + 2))
return IRQ_NONE;
ch = dev->dev[channel_id];
field = ch->common[VPIF_VIDEO_INDEX].fmt.fmt.pix.field;
for (i = 0; i < VPIF_NUMOBJECTS; i++) {