diff options
Diffstat (limited to 'drivers/gpu/drm/xe/xe_step.c')
| -rw-r--r-- | drivers/gpu/drm/xe/xe_step.c | 45 |
1 files changed, 44 insertions, 1 deletions
diff --git a/drivers/gpu/drm/xe/xe_step.c b/drivers/gpu/drm/xe/xe_step.c index a443d9bd7bbb..1baf79ba02ad 100644 --- a/drivers/gpu/drm/xe/xe_step.c +++ b/drivers/gpu/drm/xe/xe_step.c @@ -107,7 +107,14 @@ static const int pvc_basedie_subids[] = { __diag_pop(); -struct xe_step_info xe_step_get(struct xe_device *xe) +/** + * xe_step_pre_gmdid_get - Determine IP steppings from PCI revid + * @xe: Xe device + * + * Convert the PCI revid into proper IP steppings. This should only be + * used on platforms that do not have GMD_ID support. + */ +struct xe_step_info xe_step_pre_gmdid_get(struct xe_device *xe) { const struct xe_step_info *revids = NULL; struct xe_step_info step = {}; @@ -198,6 +205,42 @@ struct xe_step_info xe_step_get(struct xe_device *xe) return step; } +/** + * xe_step_gmdid_get - Determine IP steppings from GMD_ID revid fields + * @xe: Xe device + * @graphics_gmdid_revid: value of graphics GMD_ID register's revid field + * @media_gmdid_revid: value of media GMD_ID register's revid field + * + * Convert the revid fields of the GMD_ID registers into proper IP steppings. + * + * GMD_ID revid values are currently expected to have consistent meanings on + * all platforms: major steppings (A0, B0, etc.) are 4 apart, with minor + * steppings (A1, A2, etc.) taking the values in between. + */ +struct xe_step_info xe_step_gmdid_get(struct xe_device *xe, + u32 graphics_gmdid_revid, + u32 media_gmdid_revid) +{ + struct xe_step_info step = { + .graphics = STEP_A0 + graphics_gmdid_revid, + .media = STEP_A0 + media_gmdid_revid, + }; + + if (step.graphics >= STEP_FUTURE) { + step.graphics = STEP_FUTURE; + drm_dbg(&xe->drm, "Graphics GMD_ID revid value %d treated as future stepping\n", + graphics_gmdid_revid); + } + + if (step.media >= STEP_FUTURE) { + step.media = STEP_FUTURE; + drm_dbg(&xe->drm, "Media GMD_ID revid value %d treated as future stepping\n", + graphics_gmdid_revid); + } + + return step; +} + #define STEP_NAME_CASE(name) \ case STEP_##name: \ return #name; |