[Intel-gfx] [PATCH v2] drm/i915/wm: use REG_FIELD_{PREP, GET} for PLANE_WM_BLOCKS_MASK

[Ville Syrjälä]

On Wed, Feb 23, 2022 at 12:35:17PM +0200, Jani Nikula wrote:
> Use REG_FIELD_{PREP,GET} for completeness, and to avoid bitwise
> operations with different sizes.
> 
> v2: Also use REG_FIELD_GET in skl_wm_level_from_reg_val() (Ville)
> 
> Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Signed-off-by: Jani Nikula <jani.nikula at intel.com>

Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

> ---
>  drivers/gpu/drm/i915/intel_pm.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 5af16ca4dabd..f7fabcabf805 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -5930,7 +5930,7 @@ static void skl_write_wm_level(struct drm_i915_private *dev_priv,
>  		val |= PLANE_WM_EN;
>  	if (level->ignore_lines)
>  		val |= PLANE_WM_IGNORE_LINES;
> -	val |= level->blocks;
> +	val |= REG_FIELD_PREP(PLANE_WM_BLOCKS_MASK, level->blocks);
>  	val |= REG_FIELD_PREP(PLANE_WM_LINES_MASK, level->lines);
>  
>  	intel_de_write_fw(dev_priv, reg, val);
> @@ -6578,7 +6578,7 @@ static void skl_wm_level_from_reg_val(u32 val, struct skl_wm_level *level)
>  {
>  	level->enable = val & PLANE_WM_EN;
>  	level->ignore_lines = val & PLANE_WM_IGNORE_LINES;
> -	level->blocks = val & PLANE_WM_BLOCKS_MASK;
> +	level->blocks = REG_FIELD_GET(PLANE_WM_BLOCKS_MASK, val);
>  	level->lines = REG_FIELD_GET(PLANE_WM_LINES_MASK, val);
>  }
>  
> -- 
> 2.30.2

-- 
Ville Syrjälä
Intel