diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 13 |
2 files changed, 12 insertions, 3 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index f0a6816709ca..48be917e7bc5 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -3481,6 +3481,8 @@ static void update_connector_ext_caps(struct amdgpu_dm_connector *aconnector) caps->aux_support = false; else if (amdgpu_backlight == 1) caps->aux_support = true; + if (caps->aux_support) + aconnector->dc_link->backlight_control_type = BACKLIGHT_CONTROL_AMD_AUX; luminance_range = &conn_base->display_info.luminance_range; diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c index b0fea0856866..6cbbb71d752b 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c @@ -907,14 +907,14 @@ dm_helpers_probe_acpi_edid(void *data, u8 *buf, unsigned int block, size_t len) struct drm_connector *connector = data; struct acpi_device *acpidev = ACPI_COMPANION(connector->dev->dev); unsigned char start = block * EDID_LENGTH; - void *edid; + struct edid *edid; int r; if (!acpidev) return -ENODEV; /* fetch the entire edid from BIOS */ - r = acpi_video_get_edid(acpidev, ACPI_VIDEO_DISPLAY_LCD, -1, &edid); + r = acpi_video_get_edid(acpidev, ACPI_VIDEO_DISPLAY_LCD, -1, (void *)&edid); if (r < 0) { drm_dbg(connector->dev, "Failed to get EDID from ACPI: %d\n", r); return r; @@ -924,7 +924,14 @@ dm_helpers_probe_acpi_edid(void *data, u8 *buf, unsigned int block, size_t len) goto cleanup; } - memcpy(buf, edid + start, len); + /* sanity check */ + if (edid->revision < 4 || !(edid->input & DRM_EDID_INPUT_DIGITAL) || + (edid->input & DRM_EDID_DIGITAL_TYPE_MASK) == DRM_EDID_DIGITAL_TYPE_UNDEF) { + r = -EINVAL; + goto cleanup; + } + + memcpy(buf, (void *)edid + start, len); r = 0; cleanup: |