Add a comment to the pipe and transcoder enum definitions about our
assumption in the code that pipe==transcoder for PIPE_A-C /
TRANSCODER_A-C. This means we have to keep the values for these
pipe/transcoder enums fixed.
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
Cc: Mika Kahola <mika.kahola@xxxxxxxxx>
Signed-off-by: Imre Deak <imre.deak@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_display.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_display.h b/drivers/gpu/drm/i915/intel_display.h
index 43eb4ebbcc35..cbb5d79d6a4c 100644
--- a/drivers/gpu/drm/i915/intel_display.h
+++ b/drivers/gpu/drm/i915/intel_display.h
@@ -43,6 +43,10 @@ enum i915_gpio {
GPIOM,
};
+/*
+ * Keep the PIPE_A-C values fixed, we assume that pipe==transcoder for
+ * these pipes.
+ */
enum pipe {
INVALID_PIPE = -1,
@@ -56,6 +60,10 @@ enum pipe {
#define pipe_name(p) ((p) + 'A')
+/*
+ * Keep the TRANSCODER_A-C values fixed, we assume that pipe==transcoder for
+ * these transcoders.
+ */
enum transcoder {
TRANSCODER_A = 0,
TRANSCODER_B,
--
2.13.2
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