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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2024 NXP
*/
#include <linux/container_of.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_atomic_state_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_drv.h>
#include <drm/drm_fb_dma_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_gem_atomic_helper.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_print.h>
#include "dc-drv.h"
#include "dc-fu.h"
#include "dc-kms.h"
#define DC_PLANE_MAX_PITCH 0x10000
#define DC_PLANE_MAX_PIX_CNT 8192
#define dc_plane_dbg(plane, fmt, ...) \
do { \
struct drm_plane *_plane = (plane); \
drm_dbg_kms(_plane->dev, "[PLANE:%d:%s] " fmt, \
_plane->base.id, _plane->name, ##__VA_ARGS__); \
} while (0)
static const uint32_t dc_plane_formats[] = {
DRM_FORMAT_XRGB8888,
};
static const struct drm_plane_funcs dc_plane_funcs = {
.update_plane = drm_atomic_helper_update_plane,
.disable_plane = drm_atomic_helper_disable_plane,
.destroy = drm_plane_cleanup,
.reset = drm_atomic_helper_plane_reset,
.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
};
static inline struct dc_plane *to_dc_plane(struct drm_plane *plane)
{
return container_of(plane, struct dc_plane, base);
}
static int dc_plane_check_max_source_resolution(struct drm_plane_state *state)
{
int src_h = drm_rect_height(&state->src) >> 16;
int src_w = drm_rect_width(&state->src) >> 16;
if (src_w > DC_PLANE_MAX_PIX_CNT || src_h > DC_PLANE_MAX_PIX_CNT) {
dc_plane_dbg(state->plane, "invalid source resolution\n");
return -EINVAL;
}
return 0;
}
static int dc_plane_check_fb(struct drm_plane_state *state)
{
struct drm_framebuffer *fb = state->fb;
dma_addr_t baseaddr = drm_fb_dma_get_gem_addr(fb, state, 0);
/* base address alignment */
if (baseaddr & 0x3) {
dc_plane_dbg(state->plane, "fb bad baddr alignment\n");
return -EINVAL;
}
/* pitches[0] range */
if (fb->pitches[0] > DC_PLANE_MAX_PITCH) {
dc_plane_dbg(state->plane, "fb pitches[0] is out of range\n");
return -EINVAL;
}
/* pitches[0] alignment */
if (fb->pitches[0] & 0x3) {
dc_plane_dbg(state->plane, "fb bad pitches[0] alignment\n");
return -EINVAL;
}
return 0;
}
static int
dc_plane_atomic_check(struct drm_plane *plane, struct drm_atomic_state *state)
{
struct drm_plane_state *plane_state =
drm_atomic_get_new_plane_state(state, plane);
struct drm_crtc_state *crtc_state;
int ret;
/* ok to disable */
if (!plane_state->fb)
return 0;
if (!plane_state->crtc) {
dc_plane_dbg(plane, "no CRTC in plane state\n");
return -EINVAL;
}
crtc_state =
drm_atomic_get_existing_crtc_state(state, plane_state->crtc);
if (WARN_ON(!crtc_state))
return -EINVAL;
ret = drm_atomic_helper_check_plane_state(plane_state, crtc_state,
DRM_PLANE_NO_SCALING,
DRM_PLANE_NO_SCALING,
true, false);
if (ret) {
dc_plane_dbg(plane, "failed to check plane state: %d\n", ret);
return ret;
}
ret = dc_plane_check_max_source_resolution(plane_state);
if (ret)
return ret;
return dc_plane_check_fb(plane_state);
}
static void
dc_plane_atomic_update(struct drm_plane *plane, struct drm_atomic_state *state)
{
struct drm_plane_state *new_state =
drm_atomic_get_new_plane_state(state, plane);
struct dc_plane *dplane = to_dc_plane(plane);
struct drm_framebuffer *fb = new_state->fb;
const struct dc_fu_ops *fu_ops;
struct dc_lb *lb = dplane->lb;
struct dc_fu *fu = dplane->fu;
dma_addr_t baseaddr;
int src_w, src_h;
int idx;
if (!drm_dev_enter(plane->dev, &idx))
return;
src_w = drm_rect_width(&new_state->src) >> 16;
src_h = drm_rect_height(&new_state->src) >> 16;
baseaddr = drm_fb_dma_get_gem_addr(fb, new_state, 0);
fu_ops = dc_fu_get_ops(dplane->fu);
fu_ops->set_layerblend(fu, lb);
fu_ops->set_burstlength(fu, baseaddr);
fu_ops->set_src_stride(fu, DC_FETCHUNIT_FRAC0, fb->pitches[0]);
fu_ops->set_src_buf_dimensions(fu, DC_FETCHUNIT_FRAC0, src_w, src_h);
fu_ops->set_fmt(fu, DC_FETCHUNIT_FRAC0, fb->format);
fu_ops->set_framedimensions(fu, src_w, src_h);
fu_ops->set_baseaddress(fu, DC_FETCHUNIT_FRAC0, baseaddr);
fu_ops->enable_src_buf(fu, DC_FETCHUNIT_FRAC0);
dc_plane_dbg(plane, "uses %s\n", fu_ops->get_name(fu));
dc_lb_pec_dynamic_prim_sel(lb, dc_cf_get_link_id(dplane->cf));
dc_lb_pec_dynamic_sec_sel(lb, fu_ops->get_link_id(fu));
dc_lb_mode(lb, LB_BLEND);
dc_lb_position(lb, new_state->dst.x1, new_state->dst.y1);
dc_lb_pec_clken(lb, CLKEN_AUTOMATIC);
dc_plane_dbg(plane, "uses LayerBlend%d\n", dc_lb_get_id(lb));
/* set ExtDst's source to LayerBlend */
dc_ed_pec_src_sel(dplane->ed, dc_lb_get_link_id(lb));
drm_dev_exit(idx);
}
static void dc_plane_atomic_disable(struct drm_plane *plane,
struct drm_atomic_state *state)
{
struct dc_plane *dplane = to_dc_plane(plane);
const struct dc_fu_ops *fu_ops;
int idx;
if (!drm_dev_enter(plane->dev, &idx))
return;
/* disable fetchunit in shadow */
fu_ops = dc_fu_get_ops(dplane->fu);
fu_ops->disable_src_buf(dplane->fu, DC_FETCHUNIT_FRAC0);
/* set ExtDst's source to ConstFrame */
dc_ed_pec_src_sel(dplane->ed, dc_cf_get_link_id(dplane->cf));
drm_dev_exit(idx);
}
static const struct drm_plane_helper_funcs dc_plane_helper_funcs = {
.atomic_check = dc_plane_atomic_check,
.atomic_update = dc_plane_atomic_update,
.atomic_disable = dc_plane_atomic_disable,
};
int dc_plane_init(struct dc_drm_device *dc_drm, struct dc_plane *dc_plane)
{
struct drm_plane *plane = &dc_plane->base;
int ret;
ret = drm_universal_plane_init(&dc_drm->base, plane, 0, &dc_plane_funcs,
dc_plane_formats,
ARRAY_SIZE(dc_plane_formats),
NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
if (ret)
return ret;
drm_plane_helper_add(plane, &dc_plane_helper_funcs);
dc_plane->fu = dc_drm->pe->fu_disp[plane->index];
dc_plane->cf = dc_drm->pe->cf_cont[plane->index];
dc_plane->lb = dc_drm->pe->lb[plane->index];
dc_plane->ed = dc_drm->pe->ed_cont[plane->index];
return 0;
}
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