Commit d6fa8026 authored by Lijo Lazar's avatar Lijo Lazar Committed by Alex Deucher
Browse files

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: default avatarLijo Lazar <lijo.lazar@amd.com>
Acked-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent c5f4fb40

drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c

+30 −3
Original line number Diff line number Diff line
@@ -1816,16 +1816,43 @@ static ssize_t amdgpu_atombios_get_vbios_version(struct device *dev, 
	return sysfs_emit(buf, "%s\n", ctx->vbios_pn);

}



static ssize_t amdgpu_atombios_get_vbios_build(struct device *dev,

					       struct device_attribute *attr,

					       char *buf)

{

	struct drm_device *ddev = dev_get_drvdata(dev);

	struct amdgpu_device *adev = drm_to_adev(ddev);

	struct atom_context *ctx = adev->mode_info.atom_context;



	return sysfs_emit(buf, "%s\n", ctx->build_num);

}



static DEVICE_ATTR(vbios_version, 0444, amdgpu_atombios_get_vbios_version,

		   NULL);

static DEVICE_ATTR(vbios_build, 0444, amdgpu_atombios_get_vbios_build, NULL);



static struct attribute *amdgpu_vbios_version_attrs[] = {

	&dev_attr_vbios_version.attr,

	NULL

	&dev_attr_vbios_version.attr, &dev_attr_vbios_build.attr, NULL

};



static umode_t amdgpu_vbios_version_attrs_is_visible(struct kobject *kobj,

						     struct attribute *attr,

						     int index)

{

	struct device *dev = kobj_to_dev(kobj);

	struct drm_device *ddev = dev_get_drvdata(dev);

	struct amdgpu_device *adev = drm_to_adev(ddev);

	struct atom_context *ctx = adev->mode_info.atom_context;



	if (attr == &dev_attr_vbios_build.attr && !strlen(ctx->build_num))

		return 0;



	return attr->mode;

}



const struct attribute_group amdgpu_vbios_version_attr_group = {

	.attrs = amdgpu_vbios_version_attrs

	.attrs = amdgpu_vbios_version_attrs,

	.is_visible = amdgpu_vbios_version_attrs_is_visible,

};



int amdgpu_atombios_sysfs_init(struct amdgpu_device *adev)

drivers/gpu/drm/amd/amdgpu/atom.c

+22 −0
Original line number Diff line number Diff line
@@ -1494,6 +1494,27 @@ static void atom_get_vbios_version(struct atom_context *ctx) 
	}

}



static void atom_get_vbios_build(struct atom_context *ctx)

{

	unsigned char *atom_rom_hdr;

	unsigned char *str;

	uint16_t base;



	base = CU16(ATOM_ROM_TABLE_PTR);

	atom_rom_hdr = CSTR(base);



	str = CSTR(CU16(base + ATOM_ROM_CFG_PTR));

	/* Skip config string */

	while (str < atom_rom_hdr && *str++)

		;

	/* Skip change list string */

	while (str < atom_rom_hdr && *str++)

		;



	if ((str + STRLEN_NORMAL) < atom_rom_hdr)

		strscpy(ctx->build_num, str, STRLEN_NORMAL);

}



struct atom_context *amdgpu_atom_parse(struct card_info *card, void *bios)

{

	int base;
@@ -1554,6 +1575,7 @@ struct atom_context *amdgpu_atom_parse(struct card_info *card, void *bios) 
	atom_get_vbios_pn(ctx);

	atom_get_vbios_date(ctx);

	atom_get_vbios_version(ctx);

	atom_get_vbios_build(ctx);



	return ctx;

}

drivers/gpu/drm/amd/amdgpu/atom.h

+2 −0
Original line number Diff line number Diff line
@@ -37,6 +37,7 @@ struct drm_device; 
#define ATOM_ROM_MAGIC		"ATOM"

#define ATOM_ROM_MAGIC_PTR	4



#define ATOM_ROM_CFG_PTR 0xC

#define ATOM_ROM_MSG_PTR	0x10

#define ATOM_ROM_CMD_PTR	0x1E

#define ATOM_ROM_DATA_PTR	0x20
@@ -151,6 +152,7 @@ struct atom_context { 
	uint32_t version;

	uint8_t vbios_ver_str[STRLEN_NORMAL];

	uint8_t date[STRLEN_NORMAL];

	uint8_t build_num[STRLEN_NORMAL];

};



extern int amdgpu_atom_debug;