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Diffstat (limited to '')
| -rw-r--r-- | debian/patches/bugfix/all/radeon-amdgpu-firmware-is-required-for-drm-and-kms-on-r600-onward.patch | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/debian/patches/bugfix/all/radeon-amdgpu-firmware-is-required-for-drm-and-kms-on-r600-onward.patch b/debian/patches/bugfix/all/radeon-amdgpu-firmware-is-required-for-drm-and-kms-on-r600-onward.patch new file mode 100644 index 000000000..9f4d914fe --- /dev/null +++ b/debian/patches/bugfix/all/radeon-amdgpu-firmware-is-required-for-drm-and-kms-on-r600-onward.patch @@ -0,0 +1,88 @@ +From: Ben Hutchings <ben@decadent.org.uk> +Subject: radeon, amdgpu: Firmware is required for DRM and KMS on R600 onward +Date: Tue, 08 Jan 2013 03:25:52 +0000 +Bug-Debian: https://bugs.debian.org/607194 +Bug-Debian: https://bugs.debian.org/607471 +Bug-Debian: https://bugs.debian.org/610851 +Bug-Debian: https://bugs.debian.org/627497 +Bug-Debian: https://bugs.debian.org/632212 +Bug-Debian: https://bugs.debian.org/637943 +Bug-Debian: https://bugs.debian.org/649448 +Bug-Debian: https://bugs.debian.org/697229 +Bug-Debian: https://bugs.debian.org/1053764 +Forwarded: no +Last-Update: 2023-11-08 + +radeon requires firmware/microcode for the GPU in all chips, but for +newer chips (apparently R600 'Evergreen' onward) it also expects +firmware for the memory controller and other sub-blocks. + +radeon attempts to gracefully fall back and disable some features if +the firmware is not available, but becomes unstable - the framebuffer +and/or system memory may be corrupted, or the display may stay black. + +Therefore, perform a basic check for the existence of +/lib/firmware/radeon when a device is probed, and abort if it +is missing, except for the pre-R600 case. + +Update 2023-11-08: +In bug 1053764 Mario Limonciello <mario.limonciello@amd.com> states +that the patch isn't needed anymore for amdgpu, so remove that part +of the patch +--- + drivers/gpu/drm/radeon/radeon_drv.c | 30 +++++++++++++++++++++++++ + 1 files changed, 30 insertions(+) + +--- a/drivers/gpu/drm/radeon/radeon_drv.c ++++ b/drivers/gpu/drm/radeon/radeon_drv.c +@@ -32,6 +32,8 @@ + + #include <linux/compat.h> + #include <linux/module.h> ++#include <linux/namei.h> ++#include <linux/path.h> + #include <linux/pm_runtime.h> + #include <linux/vga_switcheroo.h> + #include <linux/mmu_notifier.h> +@@ -255,6 +257,28 @@ MODULE_DEVICE_TABLE(pci, pciidlist); + + static const struct drm_driver kms_driver; + ++/* Test that /lib/firmware/radeon is a directory (or symlink to a ++ * directory). We could try to match the udev search path, but let's ++ * keep it simple. ++ */ ++static bool radeon_firmware_installed(void) ++{ ++#if IS_BUILTIN(CONFIG_DRM_RADEON) ++ /* It may be too early to tell. Assume it's there. */ ++ return true; ++#else ++ struct path path; ++ ++ if (kern_path("/lib/firmware/radeon", LOOKUP_DIRECTORY | LOOKUP_FOLLOW, ++ &path) == 0) { ++ path_put(&path); ++ return true; ++ } ++ ++ return false; ++#endif ++} ++ + static int radeon_pci_probe(struct pci_dev *pdev, + const struct pci_device_id *ent) + { +@@ -295,6 +319,12 @@ static int radeon_pci_probe(struct pci_d + if (vga_switcheroo_client_probe_defer(pdev)) + return -EPROBE_DEFER; + ++ if ((ent->driver_data & RADEON_FAMILY_MASK) >= CHIP_R600 && ++ !radeon_firmware_installed()) { ++ DRM_ERROR("radeon kernel modesetting for R600 or later requires firmware installed\n"); ++ return -ENODEV; ++ } ++ + /* Get rid of things like offb */ + ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &kms_driver); + if (ret) |