From: "james qian wang (Arm Technology China)" <james.qian.wang@xxxxxxx>
Per komeda design KMS-plane maps to komeda layer input pipeline.
komeda_plane_atomic_check is for building a komeda layer input pipeline.
And KMS-plane is only a user of komeda resources. so there is no real HW
update for plane, but all HW update will be handled in crtc->flush.
v2: Rebase
Signed-off-by: James Qian Wang (Arm Technology China) <james.qian.wang@xxxxxxx>
---
.../gpu/drm/arm/display/komeda/komeda_plane.c | 128 ++++++++++++++++++
1 file changed, 128 insertions(+)
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
index 0a4953a9a909..af51f0cc9c16 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
@@ -10,7 +10,82 @@
#include "komeda_dev.h"
#include "komeda_kms.h"
+static int
+komeda_plane_init_data_flow(struct drm_plane_state *st,
+ struct komeda_data_flow_cfg *dflow)
+{
+ struct drm_framebuffer *fb = st->fb;
+
+ memset(dflow, 0, sizeof(*dflow));
+
+ dflow->blending_zorder = st->zpos;
+
+ /* if format doesn't have alpha, fix blend mode to PIXEL_NONE */
+ dflow->pixel_blend_mode = fb->format->has_alpha ?
+ st->pixel_blend_mode : DRM_MODE_BLEND_PIXEL_NONE;
+ dflow->layer_alpha = st->alpha >> 8;
+
+ dflow->out_x = st->crtc_x;
+ dflow->out_y = st->crtc_y;
+ dflow->out_w = st->crtc_w;
+ dflow->out_h = st->crtc_h;
+
+ dflow->in_x = st->src_x >> 16;
+ dflow->in_y = st->src_y >> 16;
+ dflow->in_w = st->src_w >> 16;
+ dflow->in_h = st->src_h >> 16;
+
+ return 0;
+}
+
+int komeda_plane_atomic_check(struct drm_plane *plane,
+ struct drm_plane_state *state)
+{
+ struct komeda_plane *kplane = to_kplane(plane);
+ struct komeda_plane_state *kplane_st = to_kplane_st(state);
+ struct komeda_layer *layer = kplane->layer;
+ struct drm_crtc_state *crtc_st;
+ struct komeda_crtc *kcrtc;
+ struct komeda_crtc_state *kcrtc_st;
+ struct komeda_data_flow_cfg dflow;
+ int err;
+
+ if (!state->crtc || !state->fb)
+ return 0;
+
+ crtc_st = drm_atomic_get_crtc_state(state->state, state->crtc);
+ if (!crtc_st->enable) {
+ DRM_DEBUG_ATOMIC("Cannot update plane on a disabled CRTC.\n");
+ return -EINVAL;
+ }
+
+ /* crtc is inactive, skip the resource assignment */
+ if (!crtc_st->active)
+ return 0;
+
+ kcrtc = to_kcrtc(state->crtc);
+ kcrtc_st = to_kcrtc_st(crtc_st);
+
+ err = komeda_plane_init_data_flow(state, &dflow);
+ if (err)
+ return err;
+
+ err = komeda_build_layer_data_flow(layer, kplane_st, kcrtc_st, &dflow);
+
+ return err;
+}
+
+/* plane doesn't represent a real HW, so there is no HW update for plane.
+ * komeda handles all the HW update in crtc->atomic_flush
+ */
+void komeda_plane_atomic_update(struct drm_plane *plane,
+ struct drm_plane_state *old_state)
+{
+}
+
static const struct drm_plane_helper_funcs komeda_plane_helper_funcs = {
+ .atomic_check = komeda_plane_atomic_check,
+ .atomic_update = komeda_plane_atomic_update,
};
static void komeda_plane_destroy(struct drm_plane *plane)
@@ -20,7 +95,60 @@ static void komeda_plane_destroy(struct drm_plane *plane)
kfree(to_kplane(plane));
}
+static void komeda_plane_reset(struct drm_plane *plane)
+{
+ struct komeda_plane_state *state;
+ struct komeda_plane *kplane = to_kplane(plane);
+
+ if (plane->state)
+ __drm_atomic_helper_plane_destroy_state(plane->state);
+
+ kfree(plane->state);
+ plane->state = NULL;
+
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (state) {
+ state->base.rotation = DRM_MODE_ROTATE_0;
+ state->base.pixel_blend_mode = DRM_MODE_BLEND_PREMULTI;
+ state->base.alpha = DRM_BLEND_ALPHA_OPAQUE;
+ state->base.zpos = kplane->layer->base.id;
+ plane->state = &state->base;
+ plane->state->plane = plane;
+ }
+}
+
+static struct drm_plane_state *
+komeda_plane_atomic_duplicate_state(struct drm_plane *plane)
+{
+ struct komeda_plane_state *new;
+
+ if (WARN_ON(!plane->state))
+ return NULL;
+
+ new = kzalloc(sizeof(*new), GFP_KERNEL);
+ if (!new)
+ return NULL;
+
+ __drm_atomic_helper_plane_duplicate_state(plane, &new->base);
+
+ return &new->base;
+}
+
+static void
+komeda_plane_atomic_destroy_state(struct drm_plane *plane,
+ struct drm_plane_state *state)
+{
+ __drm_atomic_helper_plane_destroy_state(state);
+ kfree(to_kplane_st(state));
+}
+
static const struct drm_plane_funcs komeda_plane_funcs = {
+ .update_plane = drm_atomic_helper_update_plane,
+ .disable_plane = drm_atomic_helper_disable_plane,
+ .destroy = komeda_plane_destroy,
+ .reset = komeda_plane_reset,
+ .atomic_duplicate_state = komeda_plane_atomic_duplicate_state,
+ .atomic_destroy_state = komeda_plane_atomic_destroy_state,
};
/* for komeda, which is pipeline can be share between crtcs */
--
2.17.1
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