Mikulas Patocka 6733fc4b78 matroxfb: perform a dummy read of M_STATUS ... commit 972754cfae upstream. I had occasional screen corruption with the matrox framebuffer driver and I found out that the reason for the corruption is that the hardware blitter accesses the videoram while it is being written to. The matrox driver has a macro WaitTillIdle() that should wait until the blitter is idle, but it sometimes doesn't work. I added a dummy read mga_inl(M_STATUS) to WaitTillIdle() to fix the problem. The dummy read will flush the write buffer in the PCI chipset, and the next read of M_STATUS will return the hardware status. Since applying this patch, I had no screen corruption at all. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com> [bwh: Backported to 3.2: adjust filename] Signed-off-by: Ben Hutchings <ben@decadent.org.uk>		2014-07-11 13:33:36 +01:00
..
g450_pll.c	matroxfb: fix problems with display stability	2009-12-16 07:20:05 -08:00
g450_pll.h	matroxfb: get rid of unneeded macros WPMINFO and friends	2009-09-23 07:39:57 -07:00
i2c-matroxfb.c	i2c: Add support for custom probe function	2010-08-11 18:20:56 +02:00
Makefile
matroxfb_accel.c	matroxfb: restore the registers M_ACCESS and M_PITCH	2014-04-30 16:23:19 +01:00
matroxfb_accel.h	matroxfb: get rid of unneeded macros WPMINFO and friends	2009-09-23 07:39:57 -07:00
matroxfb_base.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
matroxfb_base.h	matroxfb: perform a dummy read of M_STATUS	2014-07-11 13:33:36 +01:00
matroxfb_crtc2.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
matroxfb_crtc2.h
matroxfb_DAC1064.c	drivers/video/matrox/matroxfb_DAC1064.c: remove undead ifdef CONFIG_FB_MATROX_G	2010-10-27 18:03:07 -07:00
matroxfb_DAC1064.h	Fix common misspellings	2011-03-31 11:26:23 -03:00
matroxfb_g450.c	matroxfb: get rid of unneeded macro MINFO_FROM	2009-09-23 07:39:57 -07:00
matroxfb_g450.h	matroxfb: get rid of unneeded macros WPMINFO and friends	2009-09-23 07:39:57 -07:00
matroxfb_maven.c	drivers/video/matrox/matroxfb_maven.c: fix unsigned return type	2010-10-27 18:03:08 -07:00
matroxfb_maven.h
matroxfb_misc.c	matroxfb: get rid of unneeded macros WPMINFO and friends	2009-09-23 07:39:57 -07:00
matroxfb_misc.h	matroxfb: get rid of unneeded macros WPMINFO and friends	2009-09-23 07:39:57 -07:00
matroxfb_Ti3026.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
matroxfb_Ti3026.h