diff options
Diffstat (limited to 'drivers/video/omap2/dss/dsi.c')
| -rw-r--r-- | drivers/video/omap2/dss/dsi.c | 116 |
1 files changed, 56 insertions, 60 deletions
diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c index bbed3a13f9a..32297b4f7ab 100644 --- a/drivers/video/omap2/dss/dsi.c +++ b/drivers/video/omap2/dss/dsi.c @@ -232,6 +232,7 @@ static struct unsigned pll_locked; struct completion bta_completion; + void (*bta_callback)(void); int update_channel; struct dsi_update_region update_region; @@ -240,7 +241,6 @@ static struct struct workqueue_struct *workqueue; - struct work_struct framedone_work; void (*framedone_callback)(int, void *); void *framedone_data; @@ -511,9 +511,13 @@ void dsi_irq_handler(void) dss_collect_irq_stats(vcstatus, dsi.irq_stats.vc_irqs[i]); #endif - if (vcstatus & DSI_VC_IRQ_BTA) + if (vcstatus & DSI_VC_IRQ_BTA) { complete(&dsi.bta_completion); + if (dsi.bta_callback) + dsi.bta_callback(); + } + if (vcstatus & DSI_VC_IRQ_ERROR_MASK) { DSSERR("DSI VC(%d) error, vc irqstatus %x\n", i, vcstatus); @@ -2756,69 +2760,70 @@ static void dsi_te_timeout(unsigned long arg) } #endif -static void dsi_framedone_timeout_work_callback(struct work_struct *work) +static void dsi_handle_framedone(int error) { - int r; const int channel = dsi.update_channel; - DSSERR("Framedone not received for 250ms!\n"); + cancel_delayed_work(&dsi.framedone_timeout_work); - /* XXX While extremely unlikely, we could get FRAMEDONE interrupt after - * 250ms which would conflict with this timeout work. What should be - * done is first cancel the transfer on the HW, and then cancel the - * possibly scheduled framedone work */ + dsi_vc_disable_bta_irq(channel); /* SIDLEMODE back to smart-idle */ dispc_enable_sidle(); + dsi.bta_callback = NULL; + if (dsi.te_enabled) { /* enable LP_RX_TO again after the TE */ REG_FLD_MOD(DSI_TIMING2, 1, 15, 15); /* LP_RX_TO */ } - /* Send BTA after the frame. We need this for the TE to work, as TE - * trigger is only sent for BTAs without preceding packet. Thus we need - * to BTA after the pixel packets so that next BTA will cause TE - * trigger. - * - * This is not needed when TE is not in use, but we do it anyway to - * make sure that the transfer has been completed. It would be more - * optimal, but more complex, to wait only just before starting next - * transfer. */ - r = dsi_vc_send_bta_sync(channel); - if (r) - DSSERR("BTA after framedone failed\n"); - /* RX_FIFO_NOT_EMPTY */ if (REG_GET(DSI_VC_CTRL(channel), 20, 20)) { DSSERR("Received error during frame transfer:\n"); dsi_vc_flush_receive_data(channel); + if (!error) + error = -EIO; } - dsi.framedone_callback(-ETIMEDOUT, dsi.framedone_data); + dsi.framedone_callback(error, dsi.framedone_data); + + if (!error) + dsi_perf_show("DISPC"); } -static void dsi_framedone_irq_callback(void *data, u32 mask) +static void dsi_framedone_timeout_work_callback(struct work_struct *work) { - int r; - /* Note: We get FRAMEDONE when DISPC has finished sending pixels and - * turns itself off. However, DSI still has the pixels in its buffers, - * and is sending the data. - */ + /* XXX While extremely unlikely, we could get FRAMEDONE interrupt after + * 250ms which would conflict with this timeout work. What should be + * done is first cancel the transfer on the HW, and then cancel the + * possibly scheduled framedone work. However, cancelling the transfer + * on the HW is buggy, and would probably require resetting the whole + * DSI */ - /* SIDLEMODE back to smart-idle */ - dispc_enable_sidle(); + DSSERR("Framedone not received for 250ms!\n"); - r = queue_work(dsi.workqueue, &dsi.framedone_work); - BUG_ON(r == 0); + dsi_handle_framedone(-ETIMEDOUT); } -static void dsi_handle_framedone(void) +static void dsi_framedone_bta_callback(void) +{ + dsi_handle_framedone(0); + +#ifdef CONFIG_OMAP2_DSS_FAKE_VSYNC + dispc_fake_vsync_irq(); +#endif +} + +static void dsi_framedone_irq_callback(void *data, u32 mask) { - int r; const int channel = dsi.update_channel; + int r; - DSSDBG("FRAMEDONE\n"); + /* Note: We get FRAMEDONE when DISPC has finished sending pixels and + * turns itself off. However, DSI still has the pixels in its buffers, + * and is sending the data. + */ if (dsi.te_enabled) { /* enable LP_RX_TO again after the TE */ @@ -2833,33 +2838,25 @@ static void dsi_handle_framedone(void) * This is not needed when TE is not in use, but we do it anyway to * make sure that the transfer has been completed. It would be more * optimal, but more complex, to wait only just before starting next - * transfer. */ - r = dsi_vc_send_bta_sync(channel); - if (r) - DSSERR("BTA after framedone failed\n"); - - /* RX_FIFO_NOT_EMPTY */ - if (REG_GET(DSI_VC_CTRL(channel), 20, 20)) { - DSSERR("Received error during frame transfer:\n"); - dsi_vc_flush_receive_data(channel); - } - -#ifdef CONFIG_OMAP2_DSS_FAKE_VSYNC - dispc_fake_vsync_irq(); -#endif -} - -static void dsi_framedone_work_callback(struct work_struct *work) -{ - DSSDBGF(); + * transfer. + * + * Also, as there's no interrupt telling when the transfer has been + * done and the channel could be reconfigured, the only way is to + * busyloop until TE_SIZE is zero. With BTA we can do this + * asynchronously. + * */ - cancel_delayed_work_sync(&dsi.framedone_timeout_work); + dsi.bta_callback = dsi_framedone_bta_callback; - dsi_handle_framedone(); + barrier(); - dsi_perf_show("DISPC"); + dsi_vc_enable_bta_irq(channel); - dsi.framedone_callback(0, dsi.framedone_data); + r = dsi_vc_send_bta(channel); + if (r) { + DSSERR("BTA after framedone failed\n"); + dsi_handle_framedone(-EIO); + } } int omap_dsi_prepare_update(struct omap_dss_device *dssdev, @@ -3246,7 +3243,6 @@ int dsi_init(struct platform_device *pdev) if (dsi.workqueue == NULL) return -ENOMEM; - INIT_WORK(&dsi.framedone_work, dsi_framedone_work_callback); INIT_DELAYED_WORK_DEFERRABLE(&dsi.framedone_timeout_work, dsi_framedone_timeout_work_callback); |