[PATCH v2 2/2] drm/i915/display: Make POWER_DOMAIN_*() always result in enum intel_display_power_domain

[Gustavo Sousa]

In the hope of contributing to type safety in our code, let's ensure
that the type returned by the POWER_DOMAIN_*() macros is always of type
enum intel_display_power_domain.

v2:
  - Remove accidental +1 in definition of POWER_DOMAIN_PIPE(). (Jani)

Cc: Jani Nikula <jani.nik...@intel.com>
Signed-off-by: Gustavo Sousa <gustavo.so...@intel.com>
---
 drivers/gpu/drm/i915/display/intel_display_power.h | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_power.h 
b/drivers/gpu/drm/i915/display/intel_display_power.h
index 3caa3f517a32..e354051e8982 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power.h
+++ b/drivers/gpu/drm/i915/display/intel_display_power.h
@@ -117,12 +117,13 @@ enum intel_display_power_domain {
        POWER_DOMAIN_INVALID = POWER_DOMAIN_NUM,
 };
 
-#define POWER_DOMAIN_PIPE(pipe) ((int)(pipe) + POWER_DOMAIN_PIPE_A)
+#define POWER_DOMAIN_PIPE(pipe) \
+       ((enum intel_display_power_domain)((int)(pipe) + POWER_DOMAIN_PIPE_A))
 #define POWER_DOMAIN_PIPE_PANEL_FITTER(pipe) \
-               ((int)(pipe) + POWER_DOMAIN_PIPE_PANEL_FITTER_A)
+       ((enum intel_display_power_domain)((int)(pipe) + 
POWER_DOMAIN_PIPE_PANEL_FITTER_A))
 #define POWER_DOMAIN_TRANSCODER(tran) \
        ((tran) == TRANSCODER_EDP ? POWER_DOMAIN_TRANSCODER_EDP : \
-        (int)(tran) + POWER_DOMAIN_TRANSCODER_A)
+        (enum intel_display_power_domain)((int)(tran) + 
POWER_DOMAIN_TRANSCODER_A))
 
 struct intel_power_domain_mask {
        DECLARE_BITMAP(bits, POWER_DOMAIN_NUM);
-- 
2.48.1