Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
drm/amdgpu: Add vbios build number interface
Fetch VBIOS build number from atom rom image. Add a sysfs interface to
read the build number.
Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
authored by
Lijo Lazar
and committed by
Alex Deucher
d6fa8026
c5f4fb40
+54
-3
+30
-3
drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
+30
-3
drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
···
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return sysfs_emit(buf, "%s\n", ctx->vbios_pn);
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}
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+
static ssize_t amdgpu_atombios_get_vbios_build(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct drm_device *ddev = dev_get_drvdata(dev);
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struct amdgpu_device *adev = drm_to_adev(ddev);
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struct atom_context *ctx = adev->mode_info.atom_context;
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+
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return sysfs_emit(buf, "%s\n", ctx->build_num);
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}
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+
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static DEVICE_ATTR(vbios_version, 0444, amdgpu_atombios_get_vbios_version,
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NULL);
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static DEVICE_ATTR(vbios_build, 0444, amdgpu_atombios_get_vbios_build, NULL);
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static struct attribute *amdgpu_vbios_version_attrs[] = {
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&dev_attr_vbios_version.attr,
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NULL
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&dev_attr_vbios_version.attr, &dev_attr_vbios_build.attr, NULL
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};
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static umode_t amdgpu_vbios_version_attrs_is_visible(struct kobject *kobj,
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struct attribute *attr,
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int index)
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{
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struct device *dev = kobj_to_dev(kobj);
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struct drm_device *ddev = dev_get_drvdata(dev);
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struct amdgpu_device *adev = drm_to_adev(ddev);
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struct atom_context *ctx = adev->mode_info.atom_context;
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+
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if (attr == &dev_attr_vbios_build.attr && !strlen(ctx->build_num))
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return 0;
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return attr->mode;
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}
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+
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const struct attribute_group amdgpu_vbios_version_attr_group = {
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.attrs = amdgpu_vbios_version_attrs
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.attrs = amdgpu_vbios_version_attrs,
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.is_visible = amdgpu_vbios_version_attrs_is_visible,
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};
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int amdgpu_atombios_sysfs_init(struct amdgpu_device *adev)
+22
drivers/gpu/drm/amd/amdgpu/atom.c
+22
drivers/gpu/drm/amd/amdgpu/atom.c
···
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}
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}
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+
static void atom_get_vbios_build(struct atom_context *ctx)
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{
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unsigned char *atom_rom_hdr;
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unsigned char *str;
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uint16_t base;
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base = CU16(ATOM_ROM_TABLE_PTR);
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atom_rom_hdr = CSTR(base);
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+
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str = CSTR(CU16(base + ATOM_ROM_CFG_PTR));
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/* Skip config string */
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while (str < atom_rom_hdr && *str++)
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;
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/* Skip change list string */
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while (str < atom_rom_hdr && *str++)
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;
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+
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if ((str + STRLEN_NORMAL) < atom_rom_hdr)
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strscpy(ctx->build_num, str, STRLEN_NORMAL);
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}
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+
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struct atom_context *amdgpu_atom_parse(struct card_info *card, void *bios)
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{
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int base;
···
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atom_get_vbios_pn(ctx);
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atom_get_vbios_date(ctx);
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atom_get_vbios_version(ctx);
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atom_get_vbios_build(ctx);
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return ctx;
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}
+2
drivers/gpu/drm/amd/amdgpu/atom.h
+2
drivers/gpu/drm/amd/amdgpu/atom.h
···
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#define ATOM_ROM_MAGIC "ATOM"
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#define ATOM_ROM_MAGIC_PTR 4
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+
#define ATOM_ROM_CFG_PTR 0xC
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#define ATOM_ROM_MSG_PTR 0x10
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#define ATOM_ROM_CMD_PTR 0x1E
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#define ATOM_ROM_DATA_PTR 0x20
···
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uint32_t version;
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uint8_t vbios_ver_str[STRLEN_NORMAL];
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uint8_t date[STRLEN_NORMAL];
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+
uint8_t build_num[STRLEN_NORMAL];
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};
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extern int amdgpu_atom_debug;