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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2025 Icenowy Zheng <uwu@icenowy.me>
*/
#include <linux/regmap.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_gem_atomic_helper.h>
#include <drm/drm_modeset_helper_vtables.h>
#include <drm/drm_plane.h>
#include <drm/drm_print.h>
#include "vs_crtc.h"
#include "vs_plane.h"
#include "vs_dc.h"
#include "vs_primary_plane_regs.h"
static int vs_primary_plane_atomic_check(struct drm_plane *plane,
struct drm_atomic_state *state)
{
struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
plane);
struct drm_crtc *crtc = new_plane_state->crtc;
struct drm_crtc_state *crtc_state;
if (!crtc)
return 0;
crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
if (WARN_ON(!crtc_state))
return -EINVAL;
return drm_atomic_helper_check_plane_state(new_plane_state,
crtc_state,
DRM_PLANE_NO_SCALING,
DRM_PLANE_NO_SCALING,
false, true);
}
static void vs_primary_plane_commit(struct vs_dc *dc, unsigned int output)
{
regmap_set_bits(dc->regs, VSDC_FB_CONFIG_EX(output),
VSDC_FB_CONFIG_EX_COMMIT);
}
static void vs_primary_plane_atomic_enable(struct drm_plane *plane,
struct drm_atomic_state *atomic_state)
{
struct drm_plane_state *state = drm_atomic_get_new_plane_state(atomic_state,
plane);
struct drm_crtc *crtc = state->crtc;
struct vs_crtc *vcrtc = drm_crtc_to_vs_crtc(crtc);
unsigned int output = vcrtc->id;
struct vs_dc *dc = vcrtc->dc;
regmap_set_bits(dc->regs, VSDC_FB_CONFIG_EX(output),
VSDC_FB_CONFIG_EX_FB_EN);
regmap_update_bits(dc->regs, VSDC_FB_CONFIG_EX(output),
VSDC_FB_CONFIG_EX_DISPLAY_ID_MASK,
VSDC_FB_CONFIG_EX_DISPLAY_ID(output));
vs_primary_plane_commit(dc, output);
}
static void vs_primary_plane_atomic_disable(struct drm_plane *plane,
struct drm_atomic_state *atomic_state)
{
struct drm_plane_state *state = drm_atomic_get_old_plane_state(atomic_state,
plane);
struct drm_crtc *crtc = state->crtc;
struct vs_crtc *vcrtc = drm_crtc_to_vs_crtc(crtc);
unsigned int output = vcrtc->id;
struct vs_dc *dc = vcrtc->dc;
regmap_set_bits(dc->regs, VSDC_FB_CONFIG_EX(output),
VSDC_FB_CONFIG_EX_FB_EN);
vs_primary_plane_commit(dc, output);
}
static void vs_primary_plane_atomic_update(struct drm_plane *plane,
struct drm_atomic_state *atomic_state)
{
struct drm_plane_state *state = drm_atomic_get_new_plane_state(atomic_state,
plane);
struct drm_framebuffer *fb = state->fb;
struct drm_crtc *crtc = state->crtc;
struct vs_dc *dc;
struct vs_crtc *vcrtc;
struct vs_format fmt;
unsigned int output;
dma_addr_t dma_addr;
if (!state->visible) {
vs_primary_plane_atomic_disable(plane, atomic_state);
return;
}
vcrtc = drm_crtc_to_vs_crtc(crtc);
output = vcrtc->id;
dc = vcrtc->dc;
drm_format_to_vs_format(state->fb->format->format, &fmt);
regmap_update_bits(dc->regs, VSDC_FB_CONFIG(output),
VSDC_FB_CONFIG_FMT_MASK,
VSDC_FB_CONFIG_FMT(fmt.color));
regmap_update_bits(dc->regs, VSDC_FB_CONFIG(output),
VSDC_FB_CONFIG_SWIZZLE_MASK,
VSDC_FB_CONFIG_SWIZZLE(fmt.swizzle));
regmap_assign_bits(dc->regs, VSDC_FB_CONFIG(output),
VSDC_FB_CONFIG_UV_SWIZZLE_EN, fmt.uv_swizzle);
dma_addr = vs_fb_get_dma_addr(fb, &state->src);
regmap_write(dc->regs, VSDC_FB_ADDRESS(output),
lower_32_bits(dma_addr));
regmap_write(dc->regs, VSDC_FB_STRIDE(output),
fb->pitches[0]);
regmap_write(dc->regs, VSDC_FB_TOP_LEFT(output),
VSDC_MAKE_PLANE_POS(state->crtc_x, state->crtc_y));
regmap_write(dc->regs, VSDC_FB_BOTTOM_RIGHT(output),
VSDC_MAKE_PLANE_POS(state->crtc_x + state->crtc_w,
state->crtc_y + state->crtc_h));
regmap_write(dc->regs, VSDC_FB_SIZE(output),
VSDC_MAKE_PLANE_SIZE(state->crtc_w, state->crtc_h));
regmap_write(dc->regs, VSDC_FB_BLEND_CONFIG(output),
VSDC_FB_BLEND_CONFIG_BLEND_DISABLE);
vs_primary_plane_commit(dc, output);
}
static const struct drm_plane_helper_funcs vs_primary_plane_helper_funcs = {
.atomic_check = vs_primary_plane_atomic_check,
.atomic_update = vs_primary_plane_atomic_update,
.atomic_enable = vs_primary_plane_atomic_enable,
.atomic_disable = vs_primary_plane_atomic_disable,
};
static const struct drm_plane_funcs vs_primary_plane_funcs = {
.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
.disable_plane = drm_atomic_helper_disable_plane,
.reset = drm_atomic_helper_plane_reset,
.update_plane = drm_atomic_helper_update_plane,
};
struct drm_plane *vs_primary_plane_init(struct drm_device *drm_dev, struct vs_dc *dc)
{
struct drm_plane *plane;
plane = drmm_universal_plane_alloc(drm_dev, struct drm_plane, dev, 0,
&vs_primary_plane_funcs,
dc->identity.formats->array,
dc->identity.formats->num,
NULL,
DRM_PLANE_TYPE_PRIMARY,
NULL);
if (IS_ERR(plane))
return plane;
drm_plane_helper_add(plane, &vs_primary_plane_helper_funcs);
return plane;
}
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