drm/edid: Make version checks less convoluted

Get rid of the confusing version_greater() stuff and
simply compare edid->revision directly everwhere. Half
the places already did it this way, and since we actually
reject any EDID with edid->version!=1 it's a perfectly
sane thing to do.
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220927170006.27855-9-ville.syrjala@linux.intel.com

drivers/gpu/drm/drm_edid.c

@@ -1572,15 +1572,6 @@ struct drm_edid {
 	const struct edid *edid;
 };
 
-static bool version_greater(const struct drm_edid *drm_edid,
-			    u8 version, u8 revision)
-{
-	const struct edid *edid = drm_edid->edid;
-
-	return edid->version > version ||
-		(edid->version == version && edid->revision > revision);
-}
-
 static int edid_hfeeodb_extension_block_count(const struct edid *edid);
 
 static int edid_hfeeodb_block_count(const struct edid *edid)
@@ -3652,7 +3643,7 @@ do_inferred_modes(const struct detailed_timing *timing, void *c)
 						  closure->drm_edid,
 						  timing);
 
-	if (!version_greater(closure->drm_edid, 1, 1))
+	if (closure->drm_edid->edid->revision < 2)
 		return; /* GTF not defined yet */
 
 	switch (range->flags) {
@@ -3667,7 +3658,7 @@ do_inferred_modes(const struct detailed_timing *timing, void *c)
 							  timing);
 		break;
 	case DRM_EDID_CVT_SUPPORT_FLAG:
-		if (!version_greater(closure->drm_edid, 1, 3))
+		if (closure->drm_edid->edid->revision < 4)
 			break;
 
 		closure->modes += drm_cvt_modes_for_range(closure->connector,
@@ -3688,7 +3679,7 @@ static int add_inferred_modes(struct drm_connector *connector,
 		.drm_edid = drm_edid,
 	};
 
-	if (version_greater(drm_edid, 1, 0))
+	if (drm_edid->edid->revision >= 1)
 		drm_for_each_detailed_block(drm_edid, do_inferred_modes, &closure);
 
 	return closure.modes;
@@ -3765,7 +3756,7 @@ static int add_established_modes(struct drm_connector *connector,
 		}
 	}
 
-	if (version_greater(drm_edid, 1, 0))
+	if (edid->revision >= 1)
 		drm_for_each_detailed_block(drm_edid, do_established_modes,
 					    &closure);
 
@@ -3820,7 +3811,7 @@ static int add_standard_modes(struct drm_connector *connector,
 		}
 	}
 
-	if (version_greater(drm_edid, 1, 0))
+	if (drm_edid->edid->revision >= 1)
 		drm_for_each_detailed_block(drm_edid, do_standard_modes,
 					    &closure);
 
@@ -3900,7 +3891,7 @@ add_cvt_modes(struct drm_connector *connector, const struct drm_edid *drm_edid)
 		.drm_edid = drm_edid,
 	};
 
-	if (version_greater(drm_edid, 1, 2))
+	if (drm_edid->edid->revision >= 3)
 		drm_for_each_detailed_block(drm_edid, do_cvt_mode, &closure);
 
 	/* XXX should also look for CVT codes in VTB blocks */
@@ -3955,7 +3946,7 @@ static int add_detailed_modes(struct drm_connector *connector,
 		.quirks = quirks,
 	};
 
-	if (version_greater(drm_edid, 1, 3))
+	if (drm_edid->edid->revision >= 4)
 		closure.preferred = true; /* first detailed timing is always preferred */
 	else
 		closure.preferred =
@@ -6152,7 +6143,7 @@ static void drm_get_monitor_range(struct drm_connector *connector,
 {
 	struct drm_display_info *info = &connector->display_info;
 
-	if (!version_greater(drm_edid, 1, 3))
+	if (drm_edid->edid->revision < 4)
 		return;
 
 	if (!(drm_edid->edid->features & DRM_EDID_FEATURE_CONTINUOUS_FREQ))