drm/komeda: Remove layer_split property

Properties are uapi like anything else, with all the usual rules
regarding review, testcases, open source userspace ... Furthermore
driver-private kms properties are highly discouraged, over the past
few years we've realized we need to make a serious effort at better
standardizing this stuff.

Again this probably needs multiple pieces to solve this properly:

- Instead of expecting userspace to compute this (and duplicating
  modeset code), the kernel driver should compute when it's necessary
  to enable layer_split mode to make a configuration possible. I.e. in
  komeda_plane_atomic_check() first try komeda_build_layer_data_flow()
  and if that fails, try komeda_build_layer_split_data_flow(), and set
  dflow.en_split accordingly. Assuming I understand somewhat correctly
  what this does.

- If this is needed for validation then you want a debugfs file to
  force this one way or the other, or alternatively  use
  ->atomic_print_state to dump such hidden driver-private state.
  Depends upon how you do your validation ofc.

Fixes: a407a6509393 ("drm/komeda: Add layer split support")
Cc: Lowry Li (Arm Technology China) <lowry.li@arm.com>
Cc: James Qian Wang (Arm Technology China) <james.qian.wang@arm.com>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Mali DP Maintainers <malidp@foss.arm.com>
Cc: Brian Starkey <brian.starkey@arm.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190705121006.26085-4-daniel.vetter@ffwll.ch

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_kms.h b/drivers/gpu/drm/arm/display/komeda/komeda_kms.h
index fb2adc2..0c00657 100644 (file)
--- a/drivers/gpu/drm/arm/display/komeda/komeda_kms.h
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_kms.h
@@ -33,9 +33,6 @@ struct komeda_plane {
         * Layers with same capabilities.
         */
        struct komeda_layer *layer;
-
-       /** @prop_layer_split: for on/off layer_split */
-       struct drm_property *prop_layer_split;
 };
 
 /**

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
index 23db386..5bb8553 100644 (file)
--- a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
@@ -188,40 +188,6 @@ komeda_plane_atomic_destroy_state(struct drm_plane *plane,
        kfree(to_kplane_st(state));
 }
 
-static int
-komeda_plane_atomic_get_property(struct drm_plane *plane,
-                                const struct drm_plane_state *state,
-                                struct drm_property *property,
-                                uint64_t *val)
-{
-       struct komeda_plane *kplane = to_kplane(plane);
-       struct komeda_plane_state *st = to_kplane_st(state);
-
-       if (property == kplane->prop_layer_split)
-               *val = st->layer_split;
-       else
-               return -EINVAL;
-
-       return 0;
-}
-
-static int
-komeda_plane_atomic_set_property(struct drm_plane *plane,
-                                struct drm_plane_state *state,
-                                struct drm_property *property,
-                                uint64_t val)
-{
-       struct komeda_plane *kplane = to_kplane(plane);
-       struct komeda_plane_state *st = to_kplane_st(state);
-
-       if (property == kplane->prop_layer_split)
-               st->layer_split = !!val;
-       else
-               return -EINVAL;
-
-       return 0;
-}
-
 static bool
 komeda_plane_format_mod_supported(struct drm_plane *plane,
                                  u32 format, u64 modifier)
@@ -241,32 +207,9 @@ static const struct drm_plane_funcs komeda_plane_funcs = {
        .reset                  = komeda_plane_reset,
        .atomic_duplicate_state = komeda_plane_atomic_duplicate_state,
        .atomic_destroy_state   = komeda_plane_atomic_destroy_state,
-       .atomic_get_property    = komeda_plane_atomic_get_property,
-       .atomic_set_property    = komeda_plane_atomic_set_property,
        .format_mod_supported   = komeda_plane_format_mod_supported,
 };
 
-static int
-komeda_plane_create_layer_properties(struct komeda_plane *kplane,
-                                    struct komeda_layer *layer)
-{
-       struct drm_device *drm = kplane->base.dev;
-       struct drm_plane *plane = &kplane->base;
-       struct drm_property *prop = NULL;
-
-       /* property: layer split */
-       if (layer->right) {
-               prop = drm_property_create_bool(drm, DRM_MODE_PROP_ATOMIC,
-                                               "layer_split");
-               if (!prop)
-                       return -ENOMEM;
-               kplane->prop_layer_split = prop;
-               drm_object_attach_property(&plane->base, prop, 0);
-       }
-
-       return 0;
-}
-
 /* for komeda, which is pipeline can be share between crtcs */
 static u32 get_possible_crtcs(struct komeda_kms_dev *kms,
                              struct komeda_pipeline *pipe)
@@ -360,10 +303,6 @@ static int komeda_plane_add(struct komeda_kms_dev *kms,
        if (err)
                goto cleanup;
 
-       err = komeda_plane_create_layer_properties(kplane, layer);
-       if (err)
-               goto cleanup;
-
        err = drm_plane_create_color_properties(plane,
                        BIT(DRM_COLOR_YCBCR_BT601) |
                        BIT(DRM_COLOR_YCBCR_BT709) |