drm/i915/pcode: rename GEN6_PCODE_DATA to match spec

Variable naming of val and val1 should match register macro naming.
Historically, corresponding macros were named GEN6_PCODE_DATA and
GEN6_PCODE_DATA1.

Rename register macro GEN6_PCODE_DATA to GEN6_PCODE_DATA0 since spec
appended '0' to the register name. Rename val into val0 in functions
declaring val1 for both i915-specific and shared display code.

v4->v5
- clean changelog's versioning

v3->v4
- split i915 changes from xe (Jani)
- apply the rename to the read()'s signature as well (Sashiko)

v2->v3
- resolve conflict from rebase

v1->v2
- rebase onto drm-tip (Jani)

Bspec: 19978
Suggested-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Michał Grzelak <michal.grzelak@intel.com>
Link: https://patch.msgid.link/20260828190956.2622350-2-michal.grzelak@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/drm/intel/display_parent_interface.h b/include/drm/intel/display_parent_interface.h
index d7d06dcaa699..5e44c022d1ae 100644
--- a/include/drm/intel/display_parent_interface.h
+++ b/include/drm/intel/display_parent_interface.h
@@ -179,7 +179,7 @@ struct intel_display_pc8_interface {
 };
 
 struct intel_display_pcode_interface {
-	int (*read)(struct drm_device *drm, u32 mbox, u32 *val, u32 *val1);
+	int (*read)(struct drm_device *drm, u32 mbox, u32 *val0, u32 *val1);
 	int (*write)(struct drm_device *drm, u32 mbox, u32 val, int timeout_ms);
 	int (*request)(struct drm_device *drm, u32 mbox, u32 request,
 		       u32 reply_mask, u32 reply, int timeout_base_ms);