[PATCH v5 03/17] drm/i915/display: Add pipe dmc registers and bits for DC Balance

[Nautiyal, Ankit K]

On 5/13/2025 10:46 AM, Mitul Golani wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> Add pipe dmc registers and  access bits for DC Balance params
> configuration and enablement.
>
> --v2:
> - Separate register definitions for transcoder and
> pipe dmc. (Ankit)
> - Use MMIO pipe macros instead of transcoder ones. (Ankit)
> - Remove dev_priv use. (Jani, Nikula)
>
> --v3:
> - Add all register address, from capital alphabet to small. (Ankit)
> - Add EVT CTL registers.
> - Add co-author tag.
> - Add event flag for Triggering DC Balance.
>
> Co-authored-by: Mitul Golani <mitulkumar.ajitkumar.golani at intel.com>
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Signed-off-by: Mitul Golani <mitulkumar.ajitkumar.golani at intel.com>

Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>


> ---
>   drivers/gpu/drm/i915/display/intel_dmc_regs.h | 52 +++++++++++++++++++
>   1 file changed, 52 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_dmc_regs.h b/drivers/gpu/drm/i915/display/intel_dmc_regs.h
> index e16ea3f16ed8..137816cb9e9d 100644
> --- a/drivers/gpu/drm/i915/display/intel_dmc_regs.h
> +++ b/drivers/gpu/drm/i915/display/intel_dmc_regs.h
> @@ -75,6 +75,7 @@
>   #define DMC_EVT_CTL_EVENT_ID_MASK	REG_GENMASK(15, 8)
>   #define DMC_EVT_CTL_EVENT_ID_FALSE	0x01
>   #define DMC_EVT_CTL_EVENT_ID_VBLANK_A	0x32 /* main DMC */
> +#define DMC_EVT_CTL_EVENT_ID_ADAPTIVE_DC_BALANCE_TRIGGER	0x3D
>   /* An event handler scheduled to run at a 1 kHz frequency. */
>   #define DMC_EVT_CTL_EVENT_ID_CLK_MSEC	0xbf
>   
> @@ -117,4 +118,55 @@
>   #define  DMC_WAKELOCK_CTL_REQ	 REG_BIT(31)
>   #define  DMC_WAKELOCK_CTL_ACK	 REG_BIT(15)
>   
> +#define _PIPEDMC_DCB_CTL_A			0x5f1a0
> +#define _PIPEDMC_DCB_CTL_B			0x5f5a0
> +#define PIPEDMC_DCB_CTL(pipe)			_MMIO_PIPE((pipe), _PIPEDMC_DCB_CTL_A,\
> +							   _PIPEDMC_DCB_CTL_B)
> +#define PIPEDMC_ADAPTIVE_DCB_ENABLE		REG_BIT(31)
> +
> +#define _PIPEDMC_DCB_VBLANK_A			0x5f1bc
> +#define _PIPEDMC_DCB_VBLANK_B			0x5f5bc
> +#define PIPEDMC_DCB_VBLANK(pipe)		_MMIO_PIPE((pipe), _PIPEDMC_DCB_VBLANK_A,\
> +							   _PIPEDMC_DCB_VBLANK_B)
> +
> +#define _PIPEDMC_DCB_SLOPE_A			0x5f1b8
> +#define _PIPEDMC_DCB_SLOPE_B			0x5f5b8
> +#define PIPEDMC_DCB_SLOPE(pipe)			_MMIO_PIPE((pipe), _PIPEDMC_DCB_SLOPE_A,\
> +							   _PIPEDMC_DCB_SLOPE_B)
> +
> +#define _PIPEDMC_DCB_GUARDBAND_A		0x5f1b4
> +#define _PIPEDMC_DCB_GUARDBAND_B		0x5f5b4
> +#define PIPEDMC_DCB_GUARDBAND(pipe)		_MMIO_PIPE((pipe), _PIPEDMC_DCB_GUARDBAND_A,\
> +							   _PIPEDMC_DCB_GUARDBAND_B)
> +
> +#define _PIPEDMC_DCB_MAX_INCREASE_A		0x5f1ac
> +#define _PIPEDMC_DCB_MAX_INCREASE_B		0x5f5ac
> +#define PIPEDMC_DCB_MAX_INCREASE(pipe)		_MMIO_PIPE((pipe), _PIPEDMC_DCB_MAX_INCREASE_A,\
> +							   _PIPEDMC_DCB_MAX_INCREASE_B)
> +
> +#define _PIPEDMC_DCB_MAX_DECREASE_A		0x5f1b0
> +#define _PIPEDMC_DCB_MAX_DECREASE_B		0x5f5b0
> +#define PIPEDMC_DCB_MAX_DECREASE(pipe)		_MMIO_PIPE((pipe), _PIPEDMC_DCB_MAX_DECREASE_A,\
> +							   _PIPEDMC_DCB_MAX_DECREASE_B)
> +
> +#define _PIPEDMC_DCB_VMIN_A			0x5f1a4
> +#define _PIPEDMC_DCB_VMIN_B			0x5f5a4
> +#define PIPEDMC_DCB_VMIN(pipe)			_MMIO_PIPE((pipe), _PIPEDMC_DCB_VMIN_A,\
> +							   _PIPEDMC_DCB_VMIN_B)
> +
> +#define _PIPEDMC_DCB_VMAX_A			0x5f1a8
> +#define _PIPEDMC_DCB_VMAX_B			0x5f5a8
> +#define PIPEDMC_DCB_VMAX(pipe)			_MMIO_PIPE((pipe), _PIPEDMC_DCB_VMAX_A,\
> +							   _PIPEDMC_DCB_VMAX_B)
> +
> +#define _PIPEDMC_DCB_DEBUG_A			0x5f1c0
> +#define _PIPEDMC_DCB_DEBUG_B			0x5f5c0
> +#define PIPEDMC_DCB_DEBUG(pipe)			_MMIO_PIPE(pipe, _PIPEDMC_DCB_DEBUG_A,\
> +							   _PIPEDMC_DCB_DEBUG_B)
> +
> +#define _PIPEDMC_EVT_CTL_3_A			0x5f040
> +#define _PIPEDMC_EVT_CTL_3_B			0x5f440
> +#define PIPEDMC_EVT_CTL_3(pipe)			_MMIO_PIPE(pipe, _PIPEDMC_EVT_CTL_3_A,\
> +							   _PIPEDMC_EVT_CTL_3_B)
> +
>   #endif /* __INTEL_DMC_REGS_H__ */