Mikulas Patocka 4aff6991e3 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2014-06-30 20:01:32 -07:00
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g450_pll.c
g450_pll.h
i2c-matroxfb.c
Makefile
matroxfb_accel.c	matroxfb: restore the registers M_ACCESS and M_PITCH	2014-05-13 14:11:30 +02:00
matroxfb_accel.h
matroxfb_base.c	fbdev: matroxfb: Fix compilation after fb_var_screeninfo change	2011-12-21 02:26:11 +00:00
matroxfb_base.h	matroxfb: perform a dummy read of M_STATUS	2014-06-30 20:01:32 -07:00
matroxfb_crtc2.c	fbdev: matroxfb: Fix compilation after fb_var_screeninfo change	2011-12-21 02:26:11 +00:00
matroxfb_crtc2.h
matroxfb_DAC1064.c
matroxfb_DAC1064.h	Fix common misspellings	2011-03-31 11:26:23 -03:00
matroxfb_g450.c
matroxfb_g450.h
matroxfb_maven.c
matroxfb_maven.h
matroxfb_misc.c
matroxfb_misc.h
matroxfb_Ti3026.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
matroxfb_Ti3026.h