Revision 1 LCDC support also sync lost errors and can benefit from sync lost recovery routine.
Signed-off-by: Jyri Sarha jsarha@ti.com --- drivers/gpu/drm/tilcdc/tilcdc_crtc.c | 35 ++++++++++++++++++++--------------- drivers/gpu/drm/tilcdc/tilcdc_regs.h | 1 + 2 files changed, 21 insertions(+), 15 deletions(-)
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c index c787349..0169240 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c @@ -113,6 +113,7 @@ static void tilcdc_crtc_enable_irqs(struct drm_device *dev)
if (priv->rev == 1) { tilcdc_set(dev, LCDC_RASTER_CTRL_REG, + LCDC_V1_SYNC_LOST_INT_ENA | LCDC_V1_UNDERFLOW_INT_ENA); tilcdc_set(dev, LCDC_DMA_CTRL_REG, LCDC_V1_END_OF_FRAME_INT_ENA); @@ -131,6 +132,7 @@ static void tilcdc_crtc_disable_irqs(struct drm_device *dev) /* disable irqs that we might have enabled: */ if (priv->rev == 1) { tilcdc_clear(dev, LCDC_RASTER_CTRL_REG, + LCDC_V1_SYNC_LOST_INT_ENA | LCDC_V1_UNDERFLOW_INT_ENA | LCDC_V1_PL_INT_ENA); tilcdc_clear(dev, LCDC_DMA_CTRL_REG, LCDC_V1_END_OF_FRAME_INT_ENA); @@ -845,6 +847,24 @@ irqreturn_t tilcdc_crtc_irq(struct drm_crtc *crtc) dev_err_ratelimited(dev->dev, "%s(0x%08x): FIFO underflow", __func__, stat);
+ if (stat & LCDC_SYNC_LOST) { + dev_err_ratelimited(dev->dev, "%s(0x%08x): Sync lost", + __func__, stat); + tilcdc_crtc->frame_intact = false; + if (tilcdc_crtc->sync_lost_count++ > + SYNC_LOST_COUNT_LIMIT) { + dev_err(dev->dev, "%s(0x%08x): Sync lost flood detected, recovering", __func__, stat); + queue_work(system_wq, &tilcdc_crtc->recover_work); + if (priv->rev == 1) + tilcdc_clear(dev, LCDC_RASTER_CTRL_REG, + LCDC_V1_SYNC_LOST_INT_ENA); + else + tilcdc_write(dev, LCDC_INT_ENABLE_CLR_REG, + LCDC_SYNC_LOST); + tilcdc_crtc->sync_lost_count = 0; + } + } + /* For revision 2 only */ if (priv->rev == 2) { if (stat & LCDC_FRAME_DONE) { @@ -852,21 +872,6 @@ irqreturn_t tilcdc_crtc_irq(struct drm_crtc *crtc) wake_up(&tilcdc_crtc->frame_done_wq); }
- if (stat & LCDC_SYNC_LOST) { - dev_err_ratelimited(dev->dev, "%s(0x%08x): Sync lost", - __func__, stat); - tilcdc_crtc->frame_intact = false; - if (tilcdc_crtc->sync_lost_count++ > - SYNC_LOST_COUNT_LIMIT) { - dev_err(dev->dev, "%s(0x%08x): Sync lost flood detected, recovering", __func__, stat); - queue_work(system_wq, - &tilcdc_crtc->recover_work); - tilcdc_write(dev, LCDC_INT_ENABLE_CLR_REG, - LCDC_SYNC_LOST); - tilcdc_crtc->sync_lost_count = 0; - } - } - /* Indicate to LCDC that the interrupt service routine has * completed, see 13.3.6.1.6 in AM335x TRM. */ diff --git a/drivers/gpu/drm/tilcdc/tilcdc_regs.h b/drivers/gpu/drm/tilcdc/tilcdc_regs.h index f57c0d6..d195b65 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_regs.h +++ b/drivers/gpu/drm/tilcdc/tilcdc_regs.h @@ -61,6 +61,7 @@ #define LCDC_V2_UNDERFLOW_INT_ENA BIT(5) #define LCDC_V1_PL_INT_ENA BIT(4) #define LCDC_V2_PL_INT_ENA BIT(6) +#define LCDC_V1_SYNC_LOST_INT_ENA BIT(5) #define LCDC_MONOCHROME_MODE BIT(1) #define LCDC_RASTER_ENABLE BIT(0) #define LCDC_TFT_ALT_ENABLE BIT(23)