Re: [PATCH v2 07/11] drm/i915: Add a atomic evasion step to watermark programming, v2.

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Wed, Oct 26, 2016 at 03:41:35PM +0200, Maarten Lankhorst wrote:
> Allow the driver to write watermarks during atomic evasion.
> This will make it possible to write the watermarks in a cleaner
> way on gen9+.
> 
> intel_atomic_state is not used here yet, but will be used when
> we program all watermarks as a separate step during evasion.
> 
> This also writes linetime all the time, while before it was only
> done during plane updates. This looks like this could be a bugfix,
> but I'm not sure what it affects.
> 
> Changes since v1:
> - Add comment about atomic evasion to commit message.
> - Unwrap I915_WRITE call. (Lyude)
> 
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Cc: Matt Roper <matthew.d.roper@intel.com>
> Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
> ---
>  drivers/gpu/drm/i915/i915_drv.h      |  6 ++++--
>  drivers/gpu/drm/i915/intel_display.c | 20 +++++++++-----------
>  drivers/gpu/drm/i915/intel_pm.c      | 18 ++++++++++++++++--
>  3 files changed, 29 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 7a621c74254e..7a477d6a486e 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -485,6 +485,7 @@ struct sdvo_device_mapping {
>  
>  struct intel_connector;
>  struct intel_encoder;
> +struct intel_atomic_state;
>  struct intel_crtc_state;
>  struct intel_initial_plane_config;
>  struct intel_crtc;
> @@ -498,8 +499,9 @@ struct drm_i915_display_funcs {
>  	int (*compute_intermediate_wm)(struct drm_device *dev,
>  				       struct intel_crtc *intel_crtc,
>  				       struct intel_crtc_state *newstate);
> -	void (*initial_watermarks)(struct intel_crtc_state *cstate);
> -	void (*optimize_watermarks)(struct intel_crtc_state *cstate);
> +	void (*initial_watermarks)(struct intel_atomic_state *state, struct intel_crtc_state *cstate);
> +	void (*atomic_evade_watermarks)(struct intel_atomic_state *state, struct intel_crtc_state *cstate);

Same drive by comment I gave before somewhere:
That name is still super confusing. We're not trying to evade watermarks are we?

-- 
Ville Syrjälä
Intel OTC
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