031767d310
commit 972754cfaee94d6e25acf94a497bc0a864d91b7e 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> |
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| .. | ||
| Makefile | ||
| g450_pll.c | ||
| g450_pll.h | ||
| i2c-matroxfb.c | ||
| matroxfb_DAC1064.c | ||
| matroxfb_DAC1064.h | ||
| matroxfb_Ti3026.c | ||
| matroxfb_Ti3026.h | ||
| matroxfb_accel.c | ||
| matroxfb_accel.h | ||
| matroxfb_base.c | ||
| matroxfb_base.h | ||
| matroxfb_crtc2.c | ||
| matroxfb_crtc2.h | ||
| matroxfb_g450.c | ||
| matroxfb_g450.h | ||
| matroxfb_maven.c | ||
| matroxfb_maven.h | ||
| matroxfb_misc.c | ||
| matroxfb_misc.h | ||