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loader: VESA: make nvidia scaling fixup a driver setting

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Since not everyone likes the default, make it an option in the vesa
settings file. Note setting a mode with the Screen prefs overwrites
the file so it will discard the option.

Also move the code to get_mode_from_settings() since we can't load driver
settings as early as vesa_init().

Change-Id: I93080bd1fbc064dab053624ad37935268b1ed17d
This commit is contained in:
François Revol 2019-05-08 04:32:08 +02:00
parent 0bed4dedc9
commit 25de7c1b12
2 changed files with 34 additions and 18 deletions
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5
data/settings/kernel/drivers/vesa
View File

@ -2,3 +2,8 @@
# mode {x-resolution} {y-resolution} {bitdepth},
# for example:
#mode 1280 1024 32
# Set NVIDIA scaling mode
# 1: disable scaling completely
# other modes are available depending on the BIOS
#nvidia_scaling 1

47
src/system/boot/platform/bios_ia32/video.cpp
View File

@ -258,6 +258,33 @@ find_edid_mode(edid1_info& info, bool allowPalette)
}
static void
vesa_fixups(void *settings)
{
const char *oem_string = (const char *)sInfo.oem_string;
if (!strcmp(oem_string, "NVIDIA")) {
const char *arg = NULL;
int32 scaling = -1;
if (settings != NULL)
arg = get_driver_parameter(settings, "nvidia_scaling", NULL, "1");
if (arg != NULL)
scaling = strtol(arg, NULL, 0);
if (scaling > -1) {
dprintf("Setting nvidia scaling mode to %" B_PRId32 "\n", scaling);
struct bios_regs regs;
regs.eax = 0x4f14;
regs.ebx = 0x0102;
regs.ecx = scaling;
call_bios(0x10, &regs);
}
}
}
static bool
get_mode_from_settings(void)
{
@ -268,6 +295,8 @@ get_mode_from_settings(void)
if (handle == NULL)
return false;
vesa_fixups(handle);
bool found = false;
const driver_settings *settings = get_driver_settings(handle);
@ -439,30 +468,12 @@ vesa_get_vbe_info_block(vbe_info_block *info)
}
static void
vesa_fixups(vbe_info_block *info)
{
const char *oem_string = (const char *)info->oem_string;
if (!strcmp(oem_string, "NVIDIA")) {
dprintf("Disabling nvidia scaling.\n");
struct bios_regs regs;
regs.eax = 0x4f14;
regs.ebx = 0x0102;
regs.ecx = 1; // centered unscaled
call_bios(0x10, &regs);
}
}
static status_t
vesa_init(vbe_info_block *info, video_mode **_standardMode)
{
if (vesa_get_vbe_info_block(info) != B_OK)
return B_ERROR;
vesa_fixups(info);
// fill mode list and find standard video mode
video_mode *standardMode = NULL;