Re: [Intel-gfx] [PATCH v2 05/10] drm/i915/gen9: Get rid of redundant watermark values

[Maarten Lankhorst <maarten.lankhorst@linux.intel.com>]

Op 08-10-16 om 02:11 schreef Lyude:
> Now that we've make skl_wm_levels make a little more sense, we can
> remove all of the redundant wm information. Up until now we'd been
> storing two copies of all of the skl watermarks: one being the
> skl_pipe_wm structs, the other being the global wm struct in
> drm_i915_private containing the raw register values. This is confusing
> and problematic, since it means we're prone to accidentally letting the
> two copies go out of sync. So, get rid of all of the functions
> responsible for computing the register values and just use a single
> helper, skl_write_wm_level(), to convert and write the new watermarks on
> the fly.
>
> Changes since v1:
> - Fixup skl_write_wm_level()
> - Fixup skl_wm_level_from_reg_val()
> - Don't forget to copy *active to intel_crtc->wm.active.skl
>
> Signed-off-by: Lyude <cpaul@redhat.com>
> Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
> ---
>  drivers/gpu/drm/i915/i915_drv.h      |   2 -
>  drivers/gpu/drm/i915/intel_display.c |  14 ++-
>  drivers/gpu/drm/i915/intel_drv.h     |   6 +-
>  drivers/gpu/drm/i915/intel_pm.c      | 204 ++++++++++++-----------------------
>  drivers/gpu/drm/i915/intel_sprite.c  |   8 +-
>  5 files changed, 90 insertions(+), 144 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 0287c93..76583b2 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -1644,8 +1644,6 @@ struct skl_ddb_allocation {
>  struct skl_wm_values {
>  	unsigned dirty_pipes;
>  	struct skl_ddb_allocation ddb;
> -	uint32_t plane[I915_MAX_PIPES][I915_MAX_PLANES][8];
> -	uint32_t plane_trans[I915_MAX_PIPES][I915_MAX_PLANES];
>  };
>  
>  struct skl_wm_level {
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index a71d05a..39400a0 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -3378,6 +3378,8 @@ static void skylake_update_primary_plane(struct drm_plane *plane,
>  	struct intel_crtc *intel_crtc = to_intel_crtc(crtc_state->base.crtc);
>  	struct drm_framebuffer *fb = plane_state->base.fb;
>  	const struct skl_wm_values *wm = &dev_priv->wm.skl_results;
> +	const struct skl_plane_wm *p_wm =
> +		&crtc_state->wm.skl.optimal.planes[0];
>  	int pipe = intel_crtc->pipe;
>  	u32 plane_ctl;
>  	unsigned int rotation = plane_state->base.rotation;
> @@ -3414,7 +3416,7 @@ static void skylake_update_primary_plane(struct drm_plane *plane,
>  	intel_crtc->adjusted_y = src_y;
>  
>  	if (wm->dirty_pipes & drm_crtc_mask(&intel_crtc->base))
> -		skl_write_plane_wm(intel_crtc, wm, 0);
> +		skl_write_plane_wm(intel_crtc, p_wm, &wm->ddb, 0);
>  
>  	I915_WRITE(PLANE_CTL(pipe, 0), plane_ctl);
>  	I915_WRITE(PLANE_OFFSET(pipe, 0), (src_y << 16) | src_x);
> @@ -3448,6 +3450,8 @@ static void skylake_disable_primary_plane(struct drm_plane *primary,
>  	struct drm_device *dev = crtc->dev;
>  	struct drm_i915_private *dev_priv = to_i915(dev);
>  	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
> +	struct intel_crtc_state *cstate = to_intel_crtc_state(crtc->state);
> +	const struct skl_plane_wm *p_wm = &cstate->wm.skl.optimal.planes[0];
>  	int pipe = intel_crtc->pipe;
>  
>  	/*
> @@ -3455,7 +3459,8 @@ static void skylake_disable_primary_plane(struct drm_plane *primary,
>  	 * plane's visiblity isn't actually changing neither is its watermarks.
>  	 */
>  	if (!crtc->primary->state->visible)
> -		skl_write_plane_wm(intel_crtc, &dev_priv->wm.skl_results, 0);
> +		skl_write_plane_wm(intel_crtc, p_wm,
> +				   &dev_priv->wm.skl_results.ddb, 0);
>  
>  	I915_WRITE(PLANE_CTL(pipe, 0), 0);
>  	I915_WRITE(PLANE_SURF(pipe, 0), 0);
> @@ -10819,12 +10824,15 @@ static void i9xx_update_cursor(struct drm_crtc *crtc, u32 base,
>  	struct drm_device *dev = crtc->dev;
>  	struct drm_i915_private *dev_priv = to_i915(dev);
>  	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
> +	struct intel_crtc_state *cstate = to_intel_crtc_state(crtc->state);
>  	const struct skl_wm_values *wm = &dev_priv->wm.skl_results;
> +	const struct skl_plane_wm *p_wm =
> +		&cstate->wm.skl.optimal.planes[PLANE_CURSOR];
>  	int pipe = intel_crtc->pipe;
>  	uint32_t cntl = 0;
>  
>  	if (INTEL_GEN(dev_priv) >= 9 && wm->dirty_pipes & drm_crtc_mask(crtc))
> -		skl_write_cursor_wm(intel_crtc, wm);
> +		skl_write_cursor_wm(intel_crtc, p_wm, &wm->ddb);
>  
>  	if (plane_state && plane_state->base.visible) {
>  		cntl = MCURSOR_GAMMA_ENABLE;
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index d684f4f..958dc72 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -1765,9 +1765,11 @@ bool skl_ddb_allocation_equals(const struct skl_ddb_allocation *old,
>  bool skl_ddb_allocation_overlaps(struct drm_atomic_state *state,
>  				 struct intel_crtc *intel_crtc);
>  void skl_write_cursor_wm(struct intel_crtc *intel_crtc,
> -			 const struct skl_wm_values *wm);
> +			 const struct skl_plane_wm *wm,
> +			 const struct skl_ddb_allocation *ddb);
>  void skl_write_plane_wm(struct intel_crtc *intel_crtc,
> -			const struct skl_wm_values *wm,
> +			const struct skl_plane_wm *wm,
> +			const struct skl_ddb_allocation *ddb,
>  			int plane);
>  uint32_t ilk_pipe_pixel_rate(const struct intel_crtc_state *pipe_config);
>  bool ilk_disable_lp_wm(struct drm_device *dev);
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 5dbaf12..5cb537c 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -3000,6 +3000,8 @@ bool intel_can_enable_sagv(struct drm_atomic_state *state)
>  	struct drm_i915_private *dev_priv = to_i915(dev);
>  	struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
>  	struct drm_crtc *crtc;
> +	struct intel_crtc_state *cstate;
> +	struct skl_plane_wm *wm;
>  	enum pipe pipe;
>  	int level, plane;
>  
> @@ -3020,18 +3022,21 @@ bool intel_can_enable_sagv(struct drm_atomic_state *state)
>  	/* Since we're now guaranteed to only have one active CRTC... */
>  	pipe = ffs(intel_state->active_crtcs) - 1;
>  	crtc = dev_priv->pipe_to_crtc_mapping[pipe];
> +	cstate = intel_atomic_get_crtc_state(state, to_intel_crtc(crtc));
Wrong cstate here, should be crtc->state since it's committed and crtc_state is the old state.

~Maarten