Re: [PATCH v6 1/3] drm/i915: enum transcoder and pipe are moved into i915_drm.h

[Ramalingam C <ramalingam.c@intel.com>]

On 2019-08-20 at 14:14:03 +0530, Winkler, Tomas wrote:
> 
> 
> > 
> > For the reusability of the enum transcoder and enum pipe in other driver
> > modules (like mei_hdcp), enum port definition is moved from I915 local header
> > intel_display.h to drm/i915_drm.h
> 
> Don't you need to name space those definitions in the global space, I guess there are a lot of 'pipe' variables and definitions you can conflict with. 
> I guess it should be enum i915_pipe, etc. 
I am assuming that this header will be used only when you we build for
I915 driver(intel). In such case, we wont have a conflict.

Unless until this renaming is needed, we shouldn't get into it, as this
will demand i915 wide renaming.

-Ram
> 
> Thanks
> Tomas
> 
> 
> > 
> > Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
> > ---
> >  drivers/gpu/drm/i915/display/intel_display.h | 44 -------------------
> >  include/drm/i915_drm.h                       | 46 ++++++++++++++++++++
> >  2 files changed, 46 insertions(+), 44 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/display/intel_display.h
> > b/drivers/gpu/drm/i915/display/intel_display.h
> > index e57e6969051d..56f3d9073159 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display.h
> > +++ b/drivers/gpu/drm/i915/display/intel_display.h
> > @@ -71,50 +71,6 @@ enum i915_gpio {
> >  	GPIOO,
> >  };
> > 
> > -/*
> > - * Keep the pipe enum values fixed: the code assumes that PIPE_A=0, the
> > - * rest have consecutive values and match the enum values of transcoders
> > - * with a 1:1 transcoder -> pipe mapping.
> > - */
> > -enum pipe {
> > -	INVALID_PIPE = -1,
> > -
> > -	PIPE_A = 0,
> > -	PIPE_B,
> > -	PIPE_C,
> > -	PIPE_D,
> > -	_PIPE_EDP,
> > -
> > -	I915_MAX_PIPES = _PIPE_EDP
> > -};
> > -
> > -#define pipe_name(p) ((p) + 'A')
> > -
> > -enum transcoder {
> > -	/*
> > -	 * The following transcoders have a 1:1 transcoder -> pipe mapping,
> > -	 * keep their values fixed: the code assumes that TRANSCODER_A=0,
> > the
> > -	 * rest have consecutive values and match the enum values of the pipes
> > -	 * they map to.
> > -	 */
> > -	TRANSCODER_A = PIPE_A,
> > -	TRANSCODER_B = PIPE_B,
> > -	TRANSCODER_C = PIPE_C,
> > -	TRANSCODER_D = PIPE_D,
> > -
> > -	/*
> > -	 * The following transcoders can map to any pipe, their enum value
> > -	 * doesn't need to stay fixed.
> > -	 */
> > -	TRANSCODER_EDP,
> > -	TRANSCODER_DSI_0,
> > -	TRANSCODER_DSI_1,
> > -	TRANSCODER_DSI_A = TRANSCODER_DSI_0,	/* legacy DSI */
> > -	TRANSCODER_DSI_C = TRANSCODER_DSI_1,	/* legacy DSI */
> > -
> > -	I915_MAX_TRANSCODERS
> > -};
> > -
> >  static inline const char *transcoder_name(enum transcoder transcoder)  {
> >  	switch (transcoder) {
> > diff --git a/include/drm/i915_drm.h b/include/drm/i915_drm.h index
> > 23274cf92712..b0779b8267b9 100644
> > --- a/include/drm/i915_drm.h
> > +++ b/include/drm/i915_drm.h
> > @@ -118,4 +118,50 @@ enum port {
> > 
> >  #define port_name(p) ((p) + 'A')
> > 
> > +/*
> > + * Keep the pipe enum values fixed: the code assumes that PIPE_A=0, the
> > + * rest have consecutive values and match the enum values of
> > +transcoders
> > + * with a 1:1 transcoder -> pipe mapping.
> > + */
> > +enum pipe {
> > +	INVALID_PIPE = -1,
> > +
> > +	PIPE_A = 0,
> > +	PIPE_B,
> > +	PIPE_C,
> > +	PIPE_D,
> > +	_PIPE_EDP,
> > +
> > +	I915_MAX_PIPES = _PIPE_EDP
> > +};
> > +
> > +#define pipe_name(p) ((p) + 'A')
> > +
> > +enum transcoder {
> > +	INVALID_TRANSCODER = -1,
> > +
> > +	/*
> > +	 * The following transcoders have a 1:1 transcoder -> pipe mapping,
> > +	 * keep their values fixed: the code assumes that TRANSCODER_A=0,
> > the
> > +	 * rest have consecutive values and match the enum values of the pipes
> > +	 * they map to.
> > +	 */
> > +	TRANSCODER_A = PIPE_A,
> > +	TRANSCODER_B = PIPE_B,
> > +	TRANSCODER_C = PIPE_C,
> > +	TRANSCODER_D = PIPE_D,
> > +
> > +	/*
> > +	 * The following transcoders can map to any pipe, their enum value
> > +	 * doesn't need to stay fixed.
> > +	 */
> > +	TRANSCODER_EDP,
> > +	TRANSCODER_DSI_0,
> > +	TRANSCODER_DSI_1,
> > +	TRANSCODER_DSI_A = TRANSCODER_DSI_0,	/* legacy DSI */
> > +	TRANSCODER_DSI_C = TRANSCODER_DSI_1,	/* legacy DSI */
> > +
> > +	I915_MAX_TRANSCODERS
> > +};
> > +
> >  #endif				/* _I915_DRM_H_ */
> > --
> > 2.20.1
> 
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