drm/bochs: disable video before changing video mode
Subsystems (2)
PATCH 1/1 drm/bochs: disable video before changing video mode
qemu and simics simulators both seem to expect that video should be disabled before changing the video mode.
references:
http://git.qemu.org/?p=qemu.git;a=blob;f=hw/display/vga.c;h=c0f7b343bbab586c8593d29c7a765f1e6ca3662c;hb=HEAD#l727
http://wiki.osdev.org/Bochs_VBE_Extensions#Setting_display_resolution_and_bit_depth
Signed-off-by Chris Ruffin <[email protected]>
Reviewed-by Gerd Hoffmann <[email protected]>
--- drivers/gpu/drm/bochs/bochs_hw.c | 1 + 1 file changed, 1 insertion(+)
drivers/gpu/drm/bochs/bochs_hw.c +1 -0
@@ -164,6 +164,7 @@ void bochs_hw_setmode(struct bochs_device *bochs,bochs_vga_writeb (bochs,0x3c0 ,0x20 );/* unblank */ +bochs_dispi_write (bochs,VBE_DISPI_INDEX_ENABLE ,0 );bochs_dispi_write (bochs,VBE_DISPI_INDEX_BPP , bochs->bpp);bochs_dispi_write (bochs,VBE_DISPI_INDEX_XRES , bochs->xres);bochs_dispi_write (bochs,VBE_DISPI_INDEX_YRES , bochs->yres);
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