Valve Steam Deck has a 800x1280 portrait screen installed in a landscape orientation. The firmware offers a software rotated 1280x800 mode which GRUB can be made to switch to when displaying a boot menu. If this mode was selected frame buffer drivers will see this fake mode and fbcon rendering will be corrupted.
Lets therefore add a selective quirk inside the current "swap with and height" handling, which will detect this exact mode and fix it up back to the native one. This will allow the DRM based frame buffer drivers to detect the correct mode and, apply the existing panel orientation quirk, and render the console in landscape mode with no corruption. Signed-off-by: Tvrtko Ursulin <[email protected]> Cc: Thomas Zimmermann <[email protected]> Cc: Ard Biesheuvel <[email protected]> Cc: Melissa Wen <[email protected]> Cc: [email protected] Tested-by: Melissa Wen <[email protected]> # v3 --- drivers/firmware/efi/sysfb_efi.c | 47 ++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/drivers/firmware/efi/sysfb_efi.c b/drivers/firmware/efi/sysfb_efi.c index 5c54f42d5fef..db28e11d1eb7 100644 --- a/drivers/firmware/efi/sysfb_efi.c +++ b/drivers/firmware/efi/sysfb_efi.c @@ -242,6 +242,33 @@ static int __init efifb_swap_width_height(const struct dmi_system_id *id) return 1; } +struct efifb_mode_fixup { + unsigned int width; + unsigned int height; + unsigned int linelength; +}; + +static int __init +efifb_check_and_swap_width_height(const struct dmi_system_id *id) +{ + const struct efifb_mode_fixup *data = id->driver_data; + + if (data->width == screen_info.lfb_width && + data->height == screen_info.lfb_height) { + swap(screen_info.lfb_width, screen_info.lfb_height); + screen_info.lfb_linelength = data->linelength; + screen_info.lfb_size = data->linelength * data->width; + } + + return 1; +} + +static const struct efifb_mode_fixup efifb_steamdeck_mode_fixup __initconst = { + .width = 1280, + .height = 800, + .linelength = 3328, +}; + /* * Some devices have a portrait LCD but advertise a landscape resolution (and * pitch). We simply swap width and height for these devices so that we can @@ -297,6 +324,26 @@ static const struct dmi_system_id efifb_dmi_swap_width_height[] __initconst = { }, .callback = efifb_swap_width_height, }, + { + /* Valve Steam Deck (Jupiter) */ + .matches = { + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Valve"), + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Jupiter"), + DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "1"), + }, + .callback = efifb_check_and_swap_width_height, + .driver_data = (void *)&efifb_steamdeck_mode_fixup, + }, + { + /* Valve Steam Deck (Galileo) */ + .matches = { + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Valve"), + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Galileo"), + DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "1"), + }, + .callback = efifb_check_and_swap_width_height, + .driver_data = (void *)&efifb_steamdeck_mode_fixup, + }, {}, }; -- 2.51.1
