Re: [PATCH v2] drm/i915/cnl: Fix CNL macros for Voltage Swing programming

[Jani Nikula <jani.nikula@linux.intel.com>]

On Thu, 10 Jan 2019, Aditya Swarup <aditya.swarup@intel.com> wrote:
> CNL macros for register groups CNL_PORT_TX_DW2_* / CNL_PORT_TX_DW5_* are
> configured incorrectly wrt definition of _CNL_PORT_TX_DW_GRP.
>
> v2: Jani suggested to keep the macros organized semantically i.e., by
> function, secondarily by port/pipe/transcoder.->(dw, port)
>
> Cc: Clint Taylor <clinton.a.taylor@intel.com>
> Cc: Imre Deak <imre.deak@intel.com>
> Cc: Jani Nikula <jani.nikula@linux.intel.com>
> Signed-off-by: Aditya Swarup <aditya.swarup@intel.com>

Pushed to dinq with the appropriate Fixes: tag added, thanks for the
patch.

> ---
> There are still inconsistencies in some macro definitions. The macros
> for MG phy registers are (port, ln) e.g.,
> MG_TX2_LINK_PARAMS(port, ln) and also CNL_PORT_TX_DW4_LN(port, ln)
> whereas for ICL -> _ICL_PORT_PCS_DW_LN(dw, ln, port).
>
> Do you feel that we need to make these definitions consistent and what 
> should be the sequence -> (dw, ln, port)/(ln, port) or (dw, port, ln)/
> (port,ln)?

Feel free to send the patches. I think (dw, port, ln).

BR,
Jani.


>
>  drivers/gpu/drm/i915/i915_reg.h | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 44958d994bfa..fad5a9e8b44d 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -1814,7 +1814,7 @@ enum i915_power_well_id {
>  #define _CNL_PORT_TX_C_LN0_OFFSET		0x162C40
>  #define _CNL_PORT_TX_D_LN0_OFFSET		0x162E40
>  #define _CNL_PORT_TX_F_LN0_OFFSET		0x162840
> -#define _CNL_PORT_TX_DW_GRP(port, dw)	(_PICK((port), \
> +#define _CNL_PORT_TX_DW_GRP(dw, port)	(_PICK((port), \
>  					       _CNL_PORT_TX_AE_GRP_OFFSET, \
>  					       _CNL_PORT_TX_B_GRP_OFFSET, \
>  					       _CNL_PORT_TX_B_GRP_OFFSET, \
> @@ -1822,7 +1822,7 @@ enum i915_power_well_id {
>  					       _CNL_PORT_TX_AE_GRP_OFFSET, \
>  					       _CNL_PORT_TX_F_GRP_OFFSET) + \
>  					       4 * (dw))
> -#define _CNL_PORT_TX_DW_LN0(port, dw)	(_PICK((port), \
> +#define _CNL_PORT_TX_DW_LN0(dw, port)	(_PICK((port), \
>  					       _CNL_PORT_TX_AE_LN0_OFFSET, \
>  					       _CNL_PORT_TX_B_LN0_OFFSET, \
>  					       _CNL_PORT_TX_B_LN0_OFFSET, \
> @@ -1858,9 +1858,9 @@ enum i915_power_well_id {
>  
>  #define _CNL_PORT_TX_DW4_LN0_AE		0x162450
>  #define _CNL_PORT_TX_DW4_LN1_AE		0x1624D0
> -#define CNL_PORT_TX_DW4_GRP(port)	_MMIO(_CNL_PORT_TX_DW_GRP((port), 4))
> -#define CNL_PORT_TX_DW4_LN0(port)	_MMIO(_CNL_PORT_TX_DW_LN0((port), 4))
> -#define CNL_PORT_TX_DW4_LN(port, ln)   _MMIO(_CNL_PORT_TX_DW_LN0((port), 4) + \
> +#define CNL_PORT_TX_DW4_GRP(port)	_MMIO(_CNL_PORT_TX_DW_GRP(4, (port)))
> +#define CNL_PORT_TX_DW4_LN0(port)	_MMIO(_CNL_PORT_TX_DW_LN0(4, (port)))
> +#define CNL_PORT_TX_DW4_LN(port, ln)   _MMIO(_CNL_PORT_TX_DW_LN0(4, (port)) + \
>  					   ((ln) * (_CNL_PORT_TX_DW4_LN1_AE - \
>  						    _CNL_PORT_TX_DW4_LN0_AE)))
>  #define ICL_PORT_TX_DW4_AUX(port)	_MMIO(_ICL_PORT_TX_DW_AUX(4, port))
> @@ -1888,8 +1888,8 @@ enum i915_power_well_id {
>  #define   RTERM_SELECT(x)		((x) << 3)
>  #define   RTERM_SELECT_MASK		(0x7 << 3)
>  
> -#define CNL_PORT_TX_DW7_GRP(port)	_MMIO(_CNL_PORT_TX_DW_GRP((port), 7))
> -#define CNL_PORT_TX_DW7_LN0(port)	_MMIO(_CNL_PORT_TX_DW_LN0((port), 7))
> +#define CNL_PORT_TX_DW7_GRP(port)	_MMIO(_CNL_PORT_TX_DW_GRP(7, (port)))
> +#define CNL_PORT_TX_DW7_LN0(port)	_MMIO(_CNL_PORT_TX_DW_LN0(7, (port)))
>  #define ICL_PORT_TX_DW7_AUX(port)	_MMIO(_ICL_PORT_TX_DW_AUX(7, port))
>  #define ICL_PORT_TX_DW7_GRP(port)	_MMIO(_ICL_PORT_TX_DW_GRP(7, port))
>  #define ICL_PORT_TX_DW7_LN0(port)	_MMIO(_ICL_PORT_TX_DW_LN(7, 0, port))

-- 
Jani Nikula, Intel Open Source Graphics Center
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