[Intel-gfx] [PATCH v2 08/19] drm/i915/dsb: Introduce intel_dsb_noop()

[Shankar, Uma]

> -----Original Message-----
> From: Intel-gfx <intel-gfx-bounces at lists.freedesktop.org> On Behalf Of Ville
> Syrjala
> Sent: Wednesday, June 7, 2023 12:45 AM
> To: intel-gfx at lists.freedesktop.org
> Subject: [Intel-gfx] [PATCH v2 08/19] drm/i915/dsb: Introduce intel_dsb_noop()
> 
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> Add a helper for emitting a number of DSB NOOPs commands.

Looks Good to me.
Reviewed-by: Uma Shankar <uma.shankar at intel.com>

> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_dsb.c | 9 +++++++++
> drivers/gpu/drm/i915/display/intel_dsb.h | 1 +
>  2 files changed, 10 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_dsb.c
> b/drivers/gpu/drm/i915/display/intel_dsb.c
> index 22c716ee75e2..4ef799c087b4 100644
> --- a/drivers/gpu/drm/i915/display/intel_dsb.c
> +++ b/drivers/gpu/drm/i915/display/intel_dsb.c
> @@ -234,6 +234,15 @@ void intel_dsb_reg_write(struct intel_dsb *dsb,
>  	}
>  }
> 
> +void intel_dsb_noop(struct intel_dsb *dsb, int count) {
> +	int i;
> +
> +	for (i = 0; i < count; i++)
> +		intel_dsb_emit(dsb, 0,
> +			       DSB_OPCODE_NOOP << DSB_OPCODE_SHIFT); }
> +
>  static void intel_dsb_align_tail(struct intel_dsb *dsb)  {
>  	u32 aligned_tail, tail;
> diff --git a/drivers/gpu/drm/i915/display/intel_dsb.h
> b/drivers/gpu/drm/i915/display/intel_dsb.h
> index b8148b47022d..5a08bc21beda 100644
> --- a/drivers/gpu/drm/i915/display/intel_dsb.h
> +++ b/drivers/gpu/drm/i915/display/intel_dsb.h
> @@ -19,6 +19,7 @@ void intel_dsb_finish(struct intel_dsb *dsb);  void
> intel_dsb_cleanup(struct intel_dsb *dsb);  void intel_dsb_reg_write(struct
> intel_dsb *dsb,
>  			 i915_reg_t reg, u32 val);
> +void intel_dsb_noop(struct intel_dsb *dsb, int count);
>  void intel_dsb_commit(struct intel_dsb *dsb,
>  		      bool wait_for_vblank);
>  void intel_dsb_wait(struct intel_dsb *dsb);
> --
> 2.39.3