i915/display/intel_fifo_underrun.c

55  * The code also supports underrun detection on the PCH transcoder.
252 	drm_err(&dev_priv->drm, "pch fifo underrun on pch transcoder %c\n",  in cpt_check_pch_fifo_underruns()
276 				"uncleared pch fifo underrun on pch transcoder %c\n",  in cpt_set_fifo_underrun_reporting()
337  * intel_set_pch_fifo_underrun_reporting - set PCH fifo underrun reporting state
339  * @pch_transcoder: the PCH transcoder (same as pipe on IVB and older)
342  * This function makes us disable or enable PCH fifo underruns for a specific
343  * PCH transcoder. Notice that on some PCHs (e.g. CPT/PPT), disabling FIFO
344  * underrun reporting for one transcoder may also disable all the other PCH
360 	 * NOTE: Pre-LPT has a fixed cpu pipe -> pch transcoder mapping, but LPT  in intel_set_pch_fifo_underrun_reporting()
361 	 * has only one pch transcoder A that all pipes can use. To avoid racy  in intel_set_pch_fifo_underrun_reporting()
362 	 * pch transcoder -> pipe lookups from interrupt code simply store the  in intel_set_pch_fifo_underrun_reporting()
447  * intel_pch_fifo_underrun_irq_handler - handle PCH fifo underrun interrupt
449  * @pch_transcoder: the PCH transcoder (same as pipe on IVB and older)
451  * This handles a PCH fifo underrun interrupt, generating an underrun warning
461 		drm_err(&dev_priv->drm, "PCH transcoder %c FIFO underrun\n",  in intel_pch_fifo_underrun_irq_handler()
495  * intel_check_pch_fifo_underruns - check for PCH fifo underruns immediately
498  * Check for PCH fifo underruns immediately. Useful on CPT/PPT where the shared
499  * error interrupt may have been disabled, and so PCH fifo underruns won't
526 	 * We track the PCH trancoder underrun reporting state  in intel_init_fifo_underrun_reporting()
528 	 * reporting state for PCH transcoder A, crtc for pipe B housing  in intel_init_fifo_underrun_reporting()
529 	 * it for PCH transcoder B, etc. LPT-H has only PCH transcoder A,  in intel_init_fifo_underrun_reporting()
531 	 * PCH transcoders B and C would prevent enabling the south  in intel_init_fifo_underrun_reporting()