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// SPDX-License-Identifier: GPL-2.0
/*
* (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
* Author: James.Qian.Wang <james.qian.wang@arm.com>
*
*/
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_print.h>
#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)
{
drm_plane_cleanup(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 */
static u32 get_possible_crtcs(struct komeda_kms_dev *kms,
struct komeda_pipeline *pipe)
{
struct komeda_crtc *crtc;
u32 possible_crtcs = 0;
int i;
for (i = 0; i < kms->n_crtcs; i++) {
crtc = &kms->crtcs[i];
if ((pipe == crtc->master) || (pipe == crtc->slave))
possible_crtcs |= BIT(i);
}
return possible_crtcs;
}
/* use Layer0 as primary */
static u32 get_plane_type(struct komeda_kms_dev *kms,
struct komeda_component *c)
{
bool is_primary = (c->id == KOMEDA_COMPONENT_LAYER0);
return is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY;
}
static int komeda_plane_add(struct komeda_kms_dev *kms,
struct komeda_layer *layer)
{
struct komeda_dev *mdev = kms->base.dev_private;
struct komeda_component *c = &layer->base;
struct komeda_plane *kplane;
struct drm_plane *plane;
u32 *formats, n_formats = 0;
int err;
kplane = kzalloc(sizeof(*kplane), GFP_KERNEL);
if (!kplane)
return -ENOMEM;
plane = &kplane->base;
kplane->layer = layer;
formats = komeda_get_layer_fourcc_list(&mdev->fmt_tbl,
layer->layer_type, &n_formats);
err = drm_universal_plane_init(&kms->base, plane,
get_possible_crtcs(kms, c->pipeline),
&komeda_plane_funcs,
formats, n_formats, NULL,
get_plane_type(kms, c),
"%s", c->name);
komeda_put_fourcc_list(formats);
if (err)
goto cleanup;
drm_plane_helper_add(plane, &komeda_plane_helper_funcs);
return 0;
cleanup:
komeda_plane_destroy(plane);
return err;
}
int komeda_kms_add_planes(struct komeda_kms_dev *kms, struct komeda_dev *mdev)
{
struct komeda_pipeline *pipe;
int i, j, err;
for (i = 0; i < mdev->n_pipelines; i++) {
pipe = mdev->pipelines[i];
for (j = 0; j < pipe->n_layers; j++) {
err = komeda_plane_add(kms, pipe->layers[j]);
if (err)
return err;
}
}
return 0;
}
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