[PATCH v3 10/15] drm/i915/display: add subplatform group for HSW/BDW ULT

[Jani Nikula]

Add support for defining aliases for subplatform groups, such as HSW/BDW
ULT that covers both ULT and ULX.

ULT is a special case, because we slightly abuse the ULT subplatform
both as a subplatform and group, but with the way this is defined, it
should be fairly clear.

This follows i915 core and IS_HASWELL_ULT()/IS_BROADWELL_ULT()
conventions, i.e. "is ULT" also matches ULX platforms.

Note: Pedantically, this should have been done earlier, but it's only
feasible now that we no longer have a subplatform enum and can actually
initialize multiple subplatforms.

v2: Use the subplatform group idea

Signed-off-by: Jani Nikula <jani.nikula at intel.com>
---
 drivers/gpu/drm/i915/display/intel_display_device.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display_device.c b/drivers/gpu/drm/i915/display/intel_display_device.c
index 73d4c9ed5a10..cfd7d0fdf934 100644
--- a/drivers/gpu/drm/i915/display/intel_display_device.c
+++ b/drivers/gpu/drm/i915/display/intel_display_device.c
@@ -41,6 +41,13 @@ struct subplatform_desc {
 	.platforms._platform##_##_subplatform = 1,			\
 	.name = #_subplatform
 
+/*
+ * Group subplatform alias that matches multiple subplatforms. For making ult
+ * cover both ult and ulx on HSW/BDW.
+ */
+#define SUBPLATFORM_GROUP(_platform, _subplatform)			\
+	.platforms._platform##_##_subplatform = 1
+
 struct platform_desc {
 	struct intel_display_platforms platforms;
 	const char *name;
@@ -510,12 +517,15 @@ static const u16 hsw_ulx_ids[] = {
 static const struct platform_desc hsw_desc = {
 	PLATFORM(haswell),
 	.subplatforms = (const struct subplatform_desc[]) {
+		/* Special case: Use ult both as group and subplatform. */
 		{
 			SUBPLATFORM(haswell, ult),
+			SUBPLATFORM_GROUP(haswell, ult),
 			.pciidlist = hsw_ult_ids,
 		},
 		{
 			SUBPLATFORM(haswell, ulx),
+			SUBPLATFORM_GROUP(haswell, ult),
 			.pciidlist = hsw_ulx_ids,
 		},
 		{},
@@ -560,12 +570,15 @@ static const u16 bdw_ulx_ids[] = {
 static const struct platform_desc bdw_desc = {
 	PLATFORM(broadwell),
 	.subplatforms = (const struct subplatform_desc[]) {
+		/* Special case: Use ult both as group and subplatform. */
 		{
 			SUBPLATFORM(broadwell, ult),
+			SUBPLATFORM_GROUP(broadwell, ult),
 			.pciidlist = bdw_ult_ids,
 		},
 		{
 			SUBPLATFORM(broadwell, ulx),
+			SUBPLATFORM_GROUP(broadwell, ult),
 			.pciidlist = bdw_ulx_ids,
 		},
 		{},
-- 
2.39.5