drm/i915: Eliminate IS_MTL_MEDIA_STEP

Stepping-specific media behavior shouldn't be tied to MTL as a platform,
but rather specifically to the Xe_LPM+ IP.  Future non-MTL platforms may
re-use this IP and will need to follow the exact same logic and apply
the same workarounds.  IS_MTL_MEDIA_STEP() is dropped in favor of
IS_MEDIA_GT_IP_STEP, which checks the media IP version associated with a
specific IP and also ensures that we're operating on the media GT, not
the primary GT.

v2:
 - Switch to the IS_GT_IP_STEP macro.
v3:
 - Switch back to long-form IS_MEDIA_GT_IP_STEP.  (Jani)
v4:
 - Build IS_MEDIA_GT_IP_STEP on top of IS_MEDIA_GT_IP_RANGE and
   IS_MEDIA_STEP building blocks and name the parameters from/until
   rather than begin/fixed..  (Jani)
v5:
 - Tweak macro comment wording.  (Gustavo)
 - Add a check to catch NULL gt in IS_MEDIA_GT_IP_RANGE; this allows it
   to be used safely on i915->media_gt, which may be NULL on some
   platforms.  (Gustavo)

Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Gustavo Sousa <gustavo.sousa@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Gustavo Sousa <gustavo.sousa@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230821180619.650007-16-matthew.d.roper@intel.com

1 files changed, 4 insertions, 11 deletions

diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
index dfe7eff7d1a1..605e6e4fedf1 100644
--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -4191,7 +4191,7 @@ static int read_properties_unlocked(struct i915_perf *perf,
 	 * C6 disable in BIOS. Fail if Media C6 is enabled on steppings where OAM
 	 * does not work as expected.
 	 */
-	if (IS_MTL_MEDIA_STEP(props->engine->i915, STEP_A0, STEP_C0) &&
+	if (IS_MEDIA_GT_IP_STEP(props->engine->gt, IP_VER(13, 0), STEP_A0, STEP_C0) &&
 	    props->engine->oa_group->type == TYPE_OAM &&
 	    intel_check_bios_c6_setup(&props->engine->gt->rc6)) {
 		drm_dbg(&perf->i915->drm,
@@ -5300,16 +5300,9 @@ int i915_perf_ioctl_version(struct drm_i915_private *i915)
 	 * C6 disable in BIOS. If Media C6 is enabled in BIOS, return version 6
 	 * to indicate that OA media is not supported.
 	 */
-	if (IS_MTL_MEDIA_STEP(i915, STEP_A0, STEP_C0)) {
-		struct intel_gt *gt;
-		int i;
-
-		for_each_gt(gt, i915, i) {
-			if (gt->type == GT_MEDIA &&
-			    intel_check_bios_c6_setup(&gt->rc6))
-				return 6;
-		}
-	}
+	if (IS_MEDIA_GT_IP_STEP(i915->media_gt, IP_VER(13, 0), STEP_A0, STEP_C0) &&
+	    intel_check_bios_c6_setup(&i915->media_gt->rc6))
+		return 6;
 
 	return 7;
 }