diff options
Diffstat (limited to 'efi-bgrt-acpi6.2-support.patch')
| -rw-r--r-- | efi-bgrt-acpi6.2-support.patch | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/efi-bgrt-acpi6.2-support.patch b/efi-bgrt-acpi6.2-support.patch new file mode 100644 index 000000000..753c93577 --- /dev/null +++ b/efi-bgrt-acpi6.2-support.patch @@ -0,0 +1,82 @@ +From 240090cb2d72f5de98f8fc2e3aa27803cab378b2 Mon Sep 17 00:00:00 2001 +From: Hans de Goede <hdegoede@redhat.com> +Date: Wed, 29 May 2019 14:50:17 +0200 +Subject: [PATCH] efi/bgrt: Drop BGRT status field reserved bits check + +Starting with ACPI 6.2 bits 1 and 2 of the BGRT status field are no longer +reserved. These bits are now used to indicate if the image needs to be +rotated before being displayed. + +The first device using these bits has now shown up (the GPD MicroPC) and +the reserved bits check causes us to reject the valid BGRT table on this +device. + +Rather then changing the reserved bits check, allowing only the 2 new bits, +instead just completely remove it so that we do not end up with a similar +problem when more bits are added in the future. + +Signed-off-by: Hans de Goede <hdegoede@redhat.com> +--- + drivers/firmware/efi/efi-bgrt.c | 5 ----- + 1 file changed, 5 deletions(-) + +diff --git a/drivers/firmware/efi/efi-bgrt.c b/drivers/firmware/efi/efi-bgrt.c +index a2384184a7de..b07c17643210 100644 +--- a/drivers/firmware/efi/efi-bgrt.c ++++ b/drivers/firmware/efi/efi-bgrt.c +@@ -47,11 +47,6 @@ void __init efi_bgrt_init(struct acpi_table_header *table) + bgrt->version); + goto out; + } +- if (bgrt->status & 0xfe) { +- pr_notice("Ignoring BGRT: reserved status bits are non-zero %u\n", +- bgrt->status); +- goto out; +- } + if (bgrt->image_type != 0) { + pr_notice("Ignoring BGRT: invalid image type %u (expected 0)\n", + bgrt->image_type); +-- +2.21.0 + +From 8f8d779bd966ef8af2279906772dec322220e73a Mon Sep 17 00:00:00 2001 +From: Hans de Goede <hdegoede@redhat.com> +Date: Wed, 29 May 2019 15:44:09 +0200 +Subject: [PATCH] efifb: BGRT: Add check for new BGRT status field rotation + bits + +Starting with ACPI 6.2 bits 1 and 2 of the BGRT status field are no longer +reserved. These bits are now used to indicate if the image needs to be +rotated before being displayed. + +The efifb code does not support rotating the image before copying it to +the screen. + +This commit adds a check for these new bits and if they are set leaves the +fb contents as is instead of trying to use the un-rotated BGRT image. + +Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> +Signed-off-by: Hans de Goede <hdegoede@redhat.com> +--- + drivers/video/fbdev/efifb.c | 5 +++++ + 1 file changed, 5 insertions(+) + +diff --git a/drivers/video/fbdev/efifb.c b/drivers/video/fbdev/efifb.c +index 9f39f0c360e0..dfa8dd47d19d 100644 +--- a/drivers/video/fbdev/efifb.c ++++ b/drivers/video/fbdev/efifb.c +@@ -169,6 +169,11 @@ static void efifb_show_boot_graphics(struct fb_info *info) + return; + } + ++ if (bgrt_tab.status & 0x06) { ++ pr_info("efifb: BGRT rotation bits set, not showing boot graphics\n"); ++ return; ++ } ++ + /* Avoid flashing the logo if we're going to print std probe messages */ + if (console_loglevel > CONSOLE_LOGLEVEL_QUIET) + return; +-- +2.21.0 + |