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vesa: enable bios_patching by default on cards where it is known to work

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Change-Id: If2da4847ab2a10fcae53472d7f863f5397cd2f07
Reviewed-on: https://review.haiku-os.org/c/haiku/+/8633
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>
This commit is contained in:
PulkoMandy 2024-12-08 10:13:04 +01:00 committed by Adrien Destugues
parent ce14c3c0f1
commit a087f310d1
2 changed files with 31 additions and 5 deletions
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2
data/settings/kernel/drivers/vesa
View File

@ -12,5 +12,5 @@
# On some video cards, the VESA driver is able to inject custom video resolutions in the BIOS.
# This does not modify the BIOS in the hardware, the changes are erased on reboot. However,
# this is outside of VESA specifications and sometimes results in a black screen. As a result,
# this feature is disabled by default.
# this feature is disabled by default for most cards.
#bios_patching true

34
src/add-ons/kernel/drivers/graphics/vesa/vesa.cpp
View File

@ -62,7 +62,8 @@ vbe_call_finish(bios_state* state)
static status_t
find_graphics_card(addr_t frameBuffer, addr_t& base, size_t& size)
find_graphics_card(addr_t frameBuffer, addr_t& base, size_t& size, uint16_t& vendorId,
uint16_t& productId)
{
// TODO: when we port this over to the new driver API, this mechanism can be
// used to find the right device_node
@ -83,6 +84,8 @@ find_graphics_card(addr_t frameBuffer, addr_t& base, size_t& size)
// found it!
base = info.u.h0.base_registers[i];
size = info.u.h0.base_register_sizes[i];
vendorId = info.vendor_id;
productId = info.device_id;
put_module(B_PCI_MODULE_NAME);
return B_OK;
@ -367,8 +370,10 @@ vesa_init(vesa_info& info)
// Find out which PCI device we belong to, so that we know its frame buffer
// size
find_graphics_card(bufferInfo->physical_frame_buffer,
info.physical_frame_buffer, info.physical_frame_buffer_size);
uint16_t vendorId = 0;
uint16_t productId = 0;
find_graphics_card(bufferInfo->physical_frame_buffer, info.physical_frame_buffer,
info.physical_frame_buffer_size, vendorId, productId);
size_t modesSize = 0;
vesa_mode* modes = (vesa_mode*)get_boot_item(VESA_MODES_BOOT_INFO,
@ -420,14 +425,35 @@ vesa_init(vesa_info& info)
if (status != B_OK)
return status;
void* settings = load_driver_settings("vesa");
// Determine if BIOS patching can be used to inject extra video modes not available in the
// VESA BIOS. Enable this by default only on cards where it was confirmed to work.
bool patchingAllowed = false;
static const struct {
uint16_t vendor;
uint16_t device;
} kSupportedDevices[] = {
{ 0x8086, 0x0046 },
{ 0x8086, 0x0be1 },
};
for (size_t i = 0; i < B_COUNT_OF(kSupportedDevices); i++) {
if (vendorId == kSupportedDevices[i].vendor && productId == kSupportedDevices[i].device) {
patchingAllowed = true;
break;
}
}
// Allow the user to enable or disable the setting manually if they want to.
void* settings = load_driver_settings("vesa");
if (settings != NULL) {
patchingAllowed = get_driver_boolean_parameter(settings, "bios_patching",
patchingAllowed, true);
unload_driver_settings(settings);
}
// Finally, if the setting is enabled, see if we can identify the type of BIOS we are dealing
// with, and can locate the videomode tables we need to patch.
if (patchingAllowed)
vesa_identify_bios(state, &sharedInfo);
else