[PATCH 3/3] drm/i915/display: Use INTEL_GLOBAL_STATE_DEFAULTS

[Cavitt, Jonathan]

-----Original Message-----
From: Intel-gfx <intel-gfx-bounces at lists.freedesktop.org> On Behalf Of Gustavo Sousa
Sent: Thursday, December 19, 2024 1:49 PM
To: intel-gfx at lists.freedesktop.org; intel-xe at lists.freedesktop.org
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>; Nikula, Jani <jani.nikula at intel.com>
Subject: [PATCH 3/3] drm/i915/display: Use INTEL_GLOBAL_STATE_DEFAULTS
> 
> Reduce global state boilerplate by using INTEL_GLOBAL_STATE_DEFAULTS().
> The only case that requires customization is for the duplication of
> CDCLK state, which is resolved by wrapping the generic implementation.
> 
> Signed-off-by: Gustavo Sousa <gustavo.sousa at intel.com>

LGTM, though I am a bit curious under what circumstances we expect
obj->funcs->atomic_destroy_state to return a valid function pointer
with these changes?  I'm guessing we aren't depreciating/erasing that
function pointer because we might need it in the future?
Reviewed-by: Jonathan Cavitt <jonathan.cavitt at intel>
-Jonathan Cavitt

> ---
>  drivers/gpu/drm/i915/display/intel_bw.c       | 21 +------------------
>  drivers/gpu/drm/i915/display/intel_cdclk.c    | 18 +++++++---------
>  drivers/gpu/drm/i915/display/intel_pmdemand.c | 21 +------------------
>  drivers/gpu/drm/i915/display/skl_watermark.c  | 20 +-----------------
>  4 files changed, 10 insertions(+), 70 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_bw.c b/drivers/gpu/drm/i915/display/intel_bw.c
> index 30236010e0ed..f040dfa70fd9 100644
> --- a/drivers/gpu/drm/i915/display/intel_bw.c
> +++ b/drivers/gpu/drm/i915/display/intel_bw.c
> @@ -1422,27 +1422,8 @@ int intel_bw_atomic_check(struct intel_atomic_state *state)
>  	return 0;
>  }
>  
> -static struct intel_global_state *
> -intel_bw_duplicate_state(struct intel_global_obj *obj)
> -{
> -	struct intel_bw_state *state = to_intel_bw_state(obj->state);
> -
> -	state = kmemdup(state, sizeof(*state), GFP_KERNEL);
> -	if (!state)
> -		return NULL;
> -
> -	return &state->base;
> -}
> -
> -static void intel_bw_destroy_state(struct intel_global_obj *obj,
> -				   struct intel_global_state *state)
> -{
> -	kfree(state);
> -}
> -
>  static const struct intel_global_state_funcs intel_bw_funcs = {
> -	.atomic_duplicate_state = intel_bw_duplicate_state,
> -	.atomic_destroy_state = intel_bw_destroy_state,
> +	INTEL_GLOBAL_STATE_DEFAULTS(struct intel_bw_state, base),
>  };
>  
>  int intel_bw_init(struct drm_i915_private *i915)
> diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c b/drivers/gpu/drm/i915/display/intel_cdclk.c
> index fc084e2a4c6a..a9dfbd53e812 100644
> --- a/drivers/gpu/drm/i915/display/intel_cdclk.c
> +++ b/drivers/gpu/drm/i915/display/intel_cdclk.c
> @@ -3130,27 +3130,23 @@ static int fixed_modeset_calc_cdclk(struct intel_atomic_state *state)
>  
>  static struct intel_global_state *intel_cdclk_duplicate_state(struct intel_global_obj *obj)
>  {
> -	struct intel_cdclk_state *cdclk_state = to_intel_cdclk_state(obj->state);
> +	struct intel_global_state *obj_state;
> +	struct intel_cdclk_state *cdclk_state;
>  
> -	cdclk_state = kmemdup(cdclk_state, sizeof(*cdclk_state), GFP_KERNEL);
> -	if (!cdclk_state)
> +	obj_state = intel_atomic_global_duplicate_state_common(obj);
> +	if (!obj_state)
>  		return NULL;
>  
> +	cdclk_state = to_intel_cdclk_state(obj_state);
>  	cdclk_state->pipe = INVALID_PIPE;
>  	cdclk_state->disable_pipes = false;
>  
> -	return &cdclk_state->base;
> -}
> -
> -static void intel_cdclk_destroy_state(struct intel_global_obj *obj,
> -				      struct intel_global_state *state)
> -{
> -	kfree(state);
> +	return obj_state;
>  }
>  
>  static const struct intel_global_state_funcs intel_cdclk_funcs = {
> +	INTEL_GLOBAL_STATE_DEFAULTS(struct intel_cdclk_state, base),
>  	.atomic_duplicate_state = intel_cdclk_duplicate_state,
> -	.atomic_destroy_state = intel_cdclk_destroy_state,
>  };
>  
>  struct intel_cdclk_state *
> diff --git a/drivers/gpu/drm/i915/display/intel_pmdemand.c b/drivers/gpu/drm/i915/display/intel_pmdemand.c
> index 1f71efb7d04d..5bf245a9ac8d 100644
> --- a/drivers/gpu/drm/i915/display/intel_pmdemand.c
> +++ b/drivers/gpu/drm/i915/display/intel_pmdemand.c
> @@ -15,27 +15,8 @@
>  #include "intel_pmdemand.h"
>  #include "skl_watermark.h"
>  
> -static struct intel_global_state *
> -intel_pmdemand_duplicate_state(struct intel_global_obj *obj)
> -{
> -	struct intel_pmdemand_state *pmdemand_state = to_intel_pmdemand_state(obj->state);
> -
> -	pmdemand_state = kmemdup(pmdemand_state, sizeof(*pmdemand_state), GFP_KERNEL);
> -	if (!pmdemand_state)
> -		return NULL;
> -
> -	return &pmdemand_state->base;
> -}
> -
> -static void intel_pmdemand_destroy_state(struct intel_global_obj *obj,
> -					 struct intel_global_state *state)
> -{
> -	kfree(state);
> -}
> -
>  static const struct intel_global_state_funcs intel_pmdemand_funcs = {
> -	.atomic_duplicate_state = intel_pmdemand_duplicate_state,
> -	.atomic_destroy_state = intel_pmdemand_destroy_state,
> +	INTEL_GLOBAL_STATE_DEFAULTS(struct intel_pmdemand_state, base),
>  };
>  
>  static struct intel_pmdemand_state *
> diff --git a/drivers/gpu/drm/i915/display/skl_watermark.c b/drivers/gpu/drm/i915/display/skl_watermark.c
> index b3d38e09df5a..8aa041be8277 100644
> --- a/drivers/gpu/drm/i915/display/skl_watermark.c
> +++ b/drivers/gpu/drm/i915/display/skl_watermark.c
> @@ -3289,26 +3289,8 @@ static void skl_setup_wm_latency(struct drm_i915_private *i915)
>  	intel_print_wm_latency(i915, "Gen9 Plane", display->wm.skl_latency);
>  }
>  
> -static struct intel_global_state *intel_dbuf_duplicate_state(struct intel_global_obj *obj)
> -{
> -	struct intel_dbuf_state *dbuf_state = to_intel_dbuf_state(obj->state);
> -
> -	dbuf_state = kmemdup(dbuf_state, sizeof(*dbuf_state), GFP_KERNEL);
> -	if (!dbuf_state)
> -		return NULL;
> -
> -	return &dbuf_state->base;
> -}
> -
> -static void intel_dbuf_destroy_state(struct intel_global_obj *obj,
> -				     struct intel_global_state *state)
> -{
> -	kfree(state);
> -}
> -
>  static const struct intel_global_state_funcs intel_dbuf_funcs = {
> -	.atomic_duplicate_state = intel_dbuf_duplicate_state,
> -	.atomic_destroy_state = intel_dbuf_destroy_state,
> +	INTEL_GLOBAL_STATE_DEFAULTS(struct intel_dbuf_state, base),
>  };
>  
>  struct intel_dbuf_state *
> -- 
> 2.47.1
> 
>