Re: kern/55198: When the video card is Intel Mobile 965GMExpress,i915drmkms has error CPU pipe A FIFO underrun, also X freezes/hangs

[Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>]

The following reply was made to PR kern/55198; it has been noted by GNATS.

From: Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>
To: jdbaker%consolidated.net@localhost
Cc: gnats-bugs%NetBSD.org@localhost, tsutsui%ceres.dti.ne.jp@localhost
Subject: Re: kern/55198: When the video card is Intel Mobile 965GMExpress,i915drmkms
	 has error CPU pipe A FIFO underrun, also X freezes/hangs
Date: Sat, 9 May 2020 02:47:29 +0900

 > Old, works w/SNA:  i82810e, i82845, i82915
 
 I don't think i810 uses SNA (even KMS):
 
 ---
 static const struct intel_device_info intel_i81x_info = {
 	.gen = 010,
 };
 
 static const struct intel_device_info intel_i830_info = {
 	.gen = 020,
 };
 static const struct intel_device_info intel_i845_info = {
 	.gen = 020,
 };
 
  :
 
 #if UMS
 	if ((unsigned)((struct intel_device_info *)match_data)->gen < 020)
 		return lg_i810_init(scrn);
 #endif
 
 ---
 
 Is there any visible advantage with SNA on such old chips?
 (i.e. is it worth to maintain a version conditinal table?)
 
 > These are the ones I know about and have tested.  I don't know what the
 > "generation" values are for the working chips.
 
 https://github.com/NetBSD/xsrc/blob/trunk/external/mit/xf86-video-intel/dist/src/intel_module.c
 https://en.wikipedia.org/wiki/List_of_Intel_graphics_processing_units
 
 ---
 Izumi Tsutsui