diff options
Diffstat (limited to 'drivers/media/video/omap3isp/isp.c')
| -rw-r--r-- | drivers/media/video/omap3isp/isp.c | 59 |
1 files changed, 27 insertions, 32 deletions
diff --git a/drivers/media/video/omap3isp/isp.c b/drivers/media/video/omap3isp/isp.c index 12d5f923e1d0..1c347633e663 100644 --- a/drivers/media/video/omap3isp/isp.c +++ b/drivers/media/video/omap3isp/isp.c @@ -329,19 +329,6 @@ void omap3isp_configure_bridge(struct isp_device *isp, isp_reg_writel(isp, ispctrl_val, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL); } -/** - * isp_set_pixel_clock - Configures the ISP pixel clock - * @isp: OMAP3 ISP device - * @pixelclk: Average pixel clock in Hz - * - * Set the average pixel clock required by the sensor. The ISP will use the - * lowest possible memory bandwidth settings compatible with the clock. - **/ -static void isp_set_pixel_clock(struct isp_device *isp, unsigned int pixelclk) -{ - isp->isp_ccdc.vpcfg.pixelclk = pixelclk; -} - void omap3isp_hist_dma_done(struct isp_device *isp) { if (omap3isp_ccdc_busy(&isp->isp_ccdc) || @@ -739,6 +726,17 @@ static int isp_pipeline_enable(struct isp_pipeline *pipe, unsigned long flags; int ret; + /* If the preview engine crashed it might not respond to read/write + * operations on the L4 bus. This would result in a bus fault and a + * kernel oops. Refuse to start streaming in that case. This check must + * be performed before the loop below to avoid starting entities if the + * pipeline won't start anyway (those entities would then likely fail to + * stop, making the problem worse). + */ + if ((pipe->entities & isp->crashed) & + (1U << isp->isp_prev.subdev.entity.id)) + return -EIO; + spin_lock_irqsave(&pipe->lock, flags); pipe->state &= ~(ISP_PIPELINE_IDLE_INPUT | ISP_PIPELINE_IDLE_OUTPUT); spin_unlock_irqrestore(&pipe->lock, flags); @@ -774,14 +772,6 @@ static int isp_pipeline_enable(struct isp_pipeline *pipe, } } - /* Frame number propagation. In continuous streaming mode the number - * is incremented in the frame start ISR. In mem-to-mem mode - * singleshot is used and frame start IRQs are not available. - * Thus we have to increment the number here. - */ - if (pipe->do_propagation && mode == ISP_PIPELINE_STREAM_SINGLESHOT) - atomic_inc(&pipe->frame_number); - return 0; } @@ -879,13 +869,15 @@ static int isp_pipeline_disable(struct isp_pipeline *pipe) if (ret) { dev_info(isp->dev, "Unable to stop %s\n", subdev->name); + /* If the entity failed to stopped, assume it has + * crashed. Mark it as such, the ISP will be reset when + * applications will release it. + */ + isp->crashed |= 1U << subdev->entity.id; failure = -ETIMEDOUT; } } - if (failure < 0) - isp->needs_reset = true; - return failure; } @@ -1069,6 +1061,7 @@ static int isp_reset(struct isp_device *isp) udelay(1); } + isp->crashed = 0; return 0; } @@ -1495,11 +1488,13 @@ void omap3isp_put(struct isp_device *isp) BUG_ON(isp->ref_count == 0); if (--isp->ref_count == 0) { isp_disable_interrupts(isp); - isp_save_ctx(isp); - if (isp->needs_reset) { + if (isp->domain) + isp_save_ctx(isp); + /* Reset the ISP if an entity has failed to stop. This is the + * only way to recover from such conditions. + */ + if (isp->crashed) isp_reset(isp); - isp->needs_reset = false; - } isp_disable_clocks(isp); } mutex_unlock(&isp->isp_mutex); @@ -1970,7 +1965,7 @@ error_csiphy: * * Always returns 0. */ -static int isp_remove(struct platform_device *pdev) +static int __devexit isp_remove(struct platform_device *pdev) { struct isp_device *isp = platform_get_drvdata(pdev); int i; @@ -1981,6 +1976,7 @@ static int isp_remove(struct platform_device *pdev) omap3isp_get(isp); iommu_detach_device(isp->domain, &pdev->dev); iommu_domain_free(isp->domain); + isp->domain = NULL; omap3isp_put(isp); free_irq(isp->irq_num, isp); @@ -2050,7 +2046,7 @@ static int isp_map_mem_resource(struct platform_device *pdev, * -EINVAL if couldn't install ISR, * or clk_get return error value. */ -static int isp_probe(struct platform_device *pdev) +static int __devinit isp_probe(struct platform_device *pdev) { struct isp_platform_data *pdata = pdev->dev.platform_data; struct isp_device *isp; @@ -2068,7 +2064,6 @@ static int isp_probe(struct platform_device *pdev) isp->autoidle = autoidle; isp->platform_cb.set_xclk = isp_set_xclk; - isp->platform_cb.set_pixel_clock = isp_set_pixel_clock; mutex_init(&isp->isp_mutex); spin_lock_init(&isp->stat_lock); @@ -2218,7 +2213,7 @@ MODULE_DEVICE_TABLE(platform, omap3isp_id_table); static struct platform_driver omap3isp_driver = { .probe = isp_probe, - .remove = isp_remove, + .remove = __devexit_p(isp_remove), .id_table = omap3isp_id_table, .driver = { .owner = THIS_MODULE, |