[PATCH 4/7] drm/i915/gvt/display_helpers: Cast argument to enum pipe for pipe-offset macro

[Ankit Nautiyal <ankit.k.nautiyal@intel.com>]

TRANSCONF() expands via _MMIO_PIPE2, i.e., it uses pipe-based addressing.
In GVT, some call sites pass an enum transcoder to TRANSCONF(), which now
routes through INTEL_DISPLAY_DEVICE_PIPE_OFFSET() and ultimately calls
intel_display_device_pipe_offset(), whose parameter type is enum pipe.

This results in -Werror=enum-conversion.

To address this, cast the index to enum pipe in the GVT-side macro
override.

This works for all cases as TRANSCODER_{A,B,C,D} all have 1:1 mapping to
PIPE_{A,B,C,D} except for TRANSCODER_EDP.

There is one place which uses TRANSCONF() with TRANSCODER_EDP, which
appears to be incorrect. In any case, the cast preserves the previous
behaviour.

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
---
 drivers/gpu/drm/i915/gvt/display_helpers.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/gvt/display_helpers.h b/drivers/gpu/drm/i915/gvt/display_helpers.h
index 97ebc92768fc..3af878e3d78e 100644
--- a/drivers/gpu/drm/i915/gvt/display_helpers.h
+++ b/drivers/gpu/drm/i915/gvt/display_helpers.h
@@ -17,8 +17,8 @@
 #ifdef INTEL_DISPLAY_DEVICE_PIPE_OFFSET
 #undef INTEL_DISPLAY_DEVICE_PIPE_OFFSET
 #endif
-#define INTEL_DISPLAY_DEVICE_PIPE_OFFSET(display, pipe) \
-	intel_display_device_pipe_offset((display), (pipe))
+#define INTEL_DISPLAY_DEVICE_PIPE_OFFSET(display, idx) \
+	intel_display_device_pipe_offset((display), (enum pipe)(idx))
 
 #ifdef INTEL_DISPLAY_DEVICE_TRANS_OFFSET
 #undef INTEL_DISPLAY_DEVICE_TRANS_OFFSET
-- 
2.45.2