diff options
| -rw-r--r-- | drivers/media/platform/omap3isp/ispccdc.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/media/platform/omap3isp/ispccdc.c b/drivers/media/platform/omap3isp/ispccdc.c index 112bced5af99..ff2ea2bf31e4 100644 --- a/drivers/media/platform/omap3isp/ispccdc.c +++ b/drivers/media/platform/omap3isp/ispccdc.c @@ -1647,10 +1647,27 @@ static void ccdc_vd0_isr(struct isp_ccdc_device *ccdc) atomic_inc(&pipe->frame_number); } + /* Emulate a VD1 interrupt for BT.656 mode, as we can't stop the CCDC in + * the VD1 interrupt handler in that mode without risking a CCDC stall + * if a short frame is received. + */ + if (ccdc->bt656) { + spin_lock_irqsave(&ccdc->lock, flags); + if (ccdc->state == ISP_PIPELINE_STREAM_CONTINUOUS && + ccdc->output & CCDC_OUTPUT_MEMORY) { + if (ccdc->lsc.state != LSC_STATE_STOPPED) + __ccdc_lsc_enable(ccdc, 0); + __ccdc_enable(ccdc, 0); + } + ccdc_handle_stopping(ccdc, CCDC_EVENT_VD1); + spin_unlock_irqrestore(&ccdc->lock, flags); + } + if (ccdc->output & CCDC_OUTPUT_MEMORY) restart = ccdc_isr_buffer(ccdc); spin_lock_irqsave(&ccdc->lock, flags); + if (ccdc_handle_stopping(ccdc, CCDC_EVENT_VD0)) { spin_unlock_irqrestore(&ccdc->lock, flags); return; @@ -1672,6 +1689,18 @@ static void ccdc_vd1_isr(struct isp_ccdc_device *ccdc) { unsigned long flags; + /* In BT.656 mode the synchronization signals are generated by the CCDC + * from the embedded sync codes. The VD0 and VD1 interrupts are thus + * only triggered when the CCDC is enabled, unlike external sync mode + * where the line counter runs even when the CCDC is stopped. We can't + * disable the CCDC at VD1 time, as no VD0 interrupt would be generated + * for a short frame, which would result in the CCDC being stopped and + * no VD interrupt generated anymore. The CCDC is stopped from the VD0 + * interrupt handler instead for BT.656. + */ + if (ccdc->bt656) + return; + spin_lock_irqsave(&ccdc->lsc.req_lock, flags); /* |