• Lucas De Marchi's avatar
    drm/i915: Add release id version · f3973035
    Lucas De Marchi authored
    Besides the arch version returned by GRAPHICS_VER(), new platforms
    contain a "release id" to make clear the difference from one platform to
    another.
    
    The release id number is not formally defined by hardware until future
    platforms that will expose it via a new GMD_ID register.  For the
    platforms we support before that register becomes available we will set
    the values in software and we can set them as we please. So the plan is
    to set them so we can group different features under a single
    GRAPHICS_VER_FULL() check.
    
    After GMD_ID is used, the usefulness of a "full version check" will be
    greatly reduced and will be mostly used for deciding workarounds and a
    few code paths. So it makes sense to keep it as a separate field from
    graphics_ver. Also, as a platform with `release == n` may be closer
    feature-wise to `n - 2` than to `n - 1`, use the word "release" rather
    than the more common "minor" for this
    
    This is a mix of 2 independent changes: one by me and the other by Matt
    Roper.
    
    v2:
      - Reword commit message to make it clearer why we don't call it
        "minor" (Matt Roper and Tvrtko)
      - Rename variables s/*_ver_release/*_rel/ and print them in a single
        line formatted as {ver}.{rel:2} (Jani and Matt Roper)
    
    Cc: Matt Roper <matthew.d.roper@intel.com>
    Signed-off-by: default avatarLucas De Marchi <lucas.demarchi@intel.com>
    Signed-off-by: default avatarMatt Roper <matthew.d.roper@intel.com>
    Reviewed-by: default avatarMatt Roper <matthew.d.roper@intel.com>
    Link: https://patchwork.freedesktop.org/patch/msgid/20210707235921.2416911-2-lucas.demarchi@intel.com
    (cherry picked from commit ca6374e2)
    Signed-off-by: default avatarMatt Roper <matthew.d.roper@intel.com>
    f3973035
intel_device_info.c 12.3 KB