drm/i915: Move some computations out from hsw_compute_wm_parameters()

Move the watermark max computations into haswell_update_wm(). This
allows keeping the 1/2 vs. 5/6 split code in one place, and avoid having
to pass around so many things. We also save a bit of stack space by only
requiring one copy of struct hsw_wm_maximums.

Also move the intel_wm_config out from hsw_compute_wm_parameters() and
pass it it. We'll have some need for it in haswell_update_wm() later.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 9114772..3d3f113 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -2586,13 +2586,11 @@ static void intel_setup_wm_latency(struct drm_device *dev)
 
 static void hsw_compute_wm_parameters(struct drm_crtc *crtc,
                                      struct hsw_pipe_wm_parameters *p,
-                                     struct hsw_wm_maximums *lp_max_1_2,
-                                     struct hsw_wm_maximums *lp_max_5_6)
+                                     struct intel_wm_config *config)
 {
        struct drm_device *dev = crtc->dev;
        struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
        enum pipe pipe = intel_crtc->pipe;
-       struct intel_wm_config config = {};
        struct drm_plane *plane;
 
        p->active = intel_crtc_active(crtc);
@@ -2609,7 +2607,7 @@ static void hsw_compute_wm_parameters(struct drm_crtc *crtc,
        }
 
        list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
-               config.num_pipes_active += intel_crtc_active(crtc);
+               config->num_pipes_active += intel_crtc_active(crtc);
 
        list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
                struct intel_plane *intel_plane = to_intel_plane(plane);
@@ -2617,17 +2615,9 @@ static void hsw_compute_wm_parameters(struct drm_crtc *crtc,
                if (intel_plane->pipe == pipe)
                        p->spr = intel_plane->wm;
 
-               config.sprites_enabled |= intel_plane->wm.enabled;
-               config.sprites_scaled |= intel_plane->wm.scaled;
+               config->sprites_enabled |= intel_plane->wm.enabled;
+               config->sprites_scaled |= intel_plane->wm.scaled;
        }
-
-       ilk_wm_max(dev, 1, &config, INTEL_DDB_PART_1_2, lp_max_1_2);
-
-       /* 5/6 split only in single pipe config on IVB+ */
-       if (INTEL_INFO(dev)->gen >= 7 && config.num_pipes_active <= 1)
-               ilk_wm_max(dev, 1, &config, INTEL_DDB_PART_5_6, lp_max_5_6);
-       else
-               *lp_max_5_6 = *lp_max_1_2;
 }
 
 /* Compute new watermarks for the pipe */
@@ -2889,14 +2879,15 @@ static void haswell_update_wm(struct drm_crtc *crtc)
        struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
        struct drm_device *dev = crtc->dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
-       struct hsw_wm_maximums lp_max_1_2, lp_max_5_6;
+       struct hsw_wm_maximums max;
        struct hsw_pipe_wm_parameters params = {};
        struct hsw_wm_values results = {};
        enum intel_ddb_partitioning partitioning;
        struct intel_pipe_wm pipe_wm = {};
        struct intel_pipe_wm lp_wm_1_2 = {}, lp_wm_5_6 = {}, *best_lp_wm;
+       struct intel_wm_config config = {};
 
-       hsw_compute_wm_parameters(crtc, &params, &lp_max_1_2, &lp_max_5_6);
+       hsw_compute_wm_parameters(crtc, &params, &config);
 
        intel_compute_pipe_wm(crtc, &params, &pipe_wm);
 
@@ -2905,10 +2896,14 @@ static void haswell_update_wm(struct drm_crtc *crtc)
 
        intel_crtc->wm.active = pipe_wm;
 
-       ilk_wm_merge(dev, &lp_max_1_2, &lp_wm_1_2);
-       ilk_wm_merge(dev, &lp_max_5_6, &lp_wm_5_6);
+       ilk_wm_max(dev, 1, &config, INTEL_DDB_PART_1_2, &max);
+       ilk_wm_merge(dev, &max, &lp_wm_1_2);
+
+       /* 5/6 split only in single pipe config on IVB+ */
+       if (INTEL_INFO(dev)->gen >= 7 && config.num_pipes_active <= 1) {
+               ilk_wm_max(dev, 1, &config, INTEL_DDB_PART_5_6, &max);
+               ilk_wm_merge(dev, &max, &lp_wm_5_6);
 
-       if (lp_max_1_2.pri != lp_max_5_6.pri) {
                best_lp_wm = hsw_find_best_result(dev, &lp_wm_1_2, &lp_wm_5_6);
        } else {
                best_lp_wm = &lp_wm_1_2;