| Commit message (Collapse) | Author | Age | Files | Lines |
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VBE subfunction 0x15, read ddc data.
Add VBE_edid where drivers can fill in a EDID data blob.
If we find valid data there (checking the first two header
bytes), then report the function as supported and hand out
the data.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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Query the driver for the real scanline pitch in bytes.
As cbvga doesn't change the pitch on mode change, always
return the same pitch, that might exceed width times Bytes-per-pixel.
Report the default stdvga pitch for all other drivers.
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
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Move the generic function and variable definitions from vgabios.h to a
new file vgautil.h. This reduces the size and complexity of
vgabios.h.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Add support for simple text mode attribute emulation while in graphics
mode. This improves text highlighting and background color on some
boot-loaders. Enable it only for CBVGA vgabios and only when a text
mode is requested.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Allow the custom bda field vbe_flags to be used for flags outside of
vbe.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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The vgabios uses storage in the BDA at offset 0xb9 for internal custom
storage (the contents do not appear to be part of any bios standard).
Move the description of this custom vgabios area from std/bda.h to
vgasrc/vgabios.h. Add two new macros (GET_BDA_EXT and SET_BDA_EXT).
This should make it more clear that the area is for custom internal
storage.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Reorganize the save/restore functions to eliminate some boilerplate
code.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Also, sort the order of include files in the c files.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Looking at the output of other VGA BIOS implementations, it appears
that the number of available video pages reported is always between 1
and 127.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Attempt to handle cga and text modes in the vbe get_mode_info call.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Use the VBE_win_granularity field to determine if the memory windows
are relocatable. (Bochs and Cirrus vga support relocatable windows
while the standard vga controller does not.)
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Ignore any mode flags a caller may have set on the vbe get_mode_info
call. The spec doesn't require ignoring of flags, but it appears at
least some real-world vgabios vbe implementations do this.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Gcc seems to handle passing structs by value if they are 4 bytes in
size instead of 3 bytes. So, add a pad byte to struct carattr and
struct cursorpos.
Reorganize set_cursor_pos(), verify_scroll(), and handle_1013() so
there are less live variables.
Don't inline the VBE functions into the main handler code. Code
calling VBE functions are newer and are more likely to provide
adequate stack space - inlining can cause more stack usage for older
functions (which may be stack constrained).
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Claim support for VBE3 - that spec is actually more lenient for
required minimum support.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Always setup the BDA on a mode switch. Call that BDA setup code
unconditionally.
Also, always set vbe_mode and use that for finding the current mode
and for reporting the mode to vbe callers.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Only two modes don't match their expected line length. One looks like
a bug (it has a virtual line length of 1280 for a screen of 1600
bytes) and one looks like an optimization (2048 vs 1920). Change the
mode line lengths to exactly match the expected line lengths so that
the VBE code is correct.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Unify the code for the Cirrus and VBE vesa functions 00-03.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Introduce new global variables (VBE_enabled, VBE_total_memory,
VBE_capabilities, VBE_framebuffer) to replace the need for function
calls that were specific to bochsvga.
Replace info received from bochsvga_mode_info with info found in
vgahw_find_mode.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Use the same function signature for cirrus, bochsvga, and stdvga
set_mode code.
Make both the int1000 interface and the VBE 104f02 interface use the
same set_mode function.
Where clext and bochsvga need to fallback to the standard vga mode
switching, have them call vgastd_mode_switch directly.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Split out the BDA setup part of vga_set_mode to new function
modeswitch_set_bda. Move the remaining parts (palette loading, screen
clearing, font loading) of vga_set_mode into stdvga_set_mode.
Add new mode switching flags and pass them to stdvga_set_mode, so it
does not need to inspect modeset_ctl directly.
Move code needed by stdvga_set_mode (perform_gray_scale_summing,
clear_screen) to stdvga.c.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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The code is specific to the Bochs "dispi" interface, not the vesa
video bios extensions spec.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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It allowed me to boot Windows 7 with Qemu BOCHS VGA emulation and it
seemed to work fine. It probably needs some further testing though.
Signed-off-by: Julian Pidancet <julian.pidancet@gmail.com>
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Signed-off-by: Julian Pidancet <julian.pidancet@gmail.com>
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