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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2023 VeriSilicon Holdings Co., Ltd.
*
*/
#include <linux/clk.h>
#include <linux/debugfs.h>
#include <linux/media-bus-format.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_atomic.h>
#include <drm/drm_crtc.h>
#include <drm/drm_gem_atomic_helper.h>
#include <drm/drm_vblank.h>
#include "vs_crtc.h"
#include "vs_dc.h"
#include "vs_drv.h"
static void vs_crtc_atomic_destroy_state(struct drm_crtc *crtc,
struct drm_crtc_state *state)
{
__drm_atomic_helper_crtc_destroy_state(state);
kfree(to_vs_crtc_state(state));
}
static void vs_crtc_reset(struct drm_crtc *crtc)
{
struct vs_crtc_state *state;
if (crtc->state)
vs_crtc_atomic_destroy_state(crtc, crtc->state);
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (!state)
return;
__drm_atomic_helper_crtc_reset(crtc, &state->base);
}
static struct drm_crtc_state *
vs_crtc_atomic_duplicate_state(struct drm_crtc *crtc)
{
struct vs_crtc_state *old_state;
struct vs_crtc_state *state;
if (!crtc->state)
return NULL;
old_state = to_vs_crtc_state(crtc->state);
state = kmemdup(old_state, sizeof(*old_state), GFP_KERNEL);
if (!state)
return NULL;
__drm_atomic_helper_crtc_duplicate_state(crtc, &state->base);
return &state->base;
}
static int vs_crtc_enable_vblank(struct drm_crtc *crtc)
{
struct vs_crtc *vs_crtc = to_vs_crtc(crtc);
struct vs_dc *dc = dev_get_drvdata(vs_crtc->dev);
vs_dc_enable_vblank(dc, true);
return 0;
}
static void vs_crtc_disable_vblank(struct drm_crtc *crtc)
{
struct vs_crtc *vs_crtc = to_vs_crtc(crtc);
struct vs_dc *dc = dev_get_drvdata(vs_crtc->dev);
vs_dc_enable_vblank(dc, false);
}
static void vs_crtc_atomic_print_state(struct drm_printer *p,
const struct drm_crtc_state *state)
{
struct vs_crtc *vs_crtc = to_vs_crtc(state->crtc);
drm_printf(p, "vs crtc State\n");
drm_printf(p, "\tcolor_formats: %d\n", vs_crtc->color_formats);
drm_printf(p, "\tmax_bpc: %d\n", vs_crtc->max_bpc);
}
static const struct drm_crtc_funcs vs_crtc_funcs = {
.set_config = drm_atomic_helper_set_config,
.page_flip = drm_atomic_helper_page_flip,
.reset = vs_crtc_reset,
.atomic_duplicate_state = vs_crtc_atomic_duplicate_state,
.atomic_destroy_state = vs_crtc_atomic_destroy_state,
.enable_vblank = vs_crtc_enable_vblank,
.disable_vblank = vs_crtc_disable_vblank,
.atomic_print_state = vs_crtc_atomic_print_state,
};
static void vs_crtc_atomic_enable(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
struct vs_crtc *vs_crtc = to_vs_crtc(crtc);
struct vs_dc *dc = dev_get_drvdata(vs_crtc->dev);
vs_dc_enable(dc, crtc);
drm_crtc_vblank_on(crtc);
}
static void vs_crtc_atomic_disable(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
struct vs_crtc *vs_crtc = to_vs_crtc(crtc);
struct vs_dc *dc = dev_get_drvdata(vs_crtc->dev);
drm_crtc_vblank_off(crtc);
vs_dc_disable(dc, crtc);
if (crtc->state->event && !crtc->state->active) {
spin_lock_irq(&crtc->dev->event_lock);
drm_crtc_send_vblank_event(crtc, crtc->state->event);
crtc->state->event = NULL;
spin_unlock_irq(&crtc->dev->event_lock);
}
}
static void vs_crtc_atomic_begin(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
struct drm_crtc_state *new_state = drm_atomic_get_new_crtc_state(state,
crtc);
struct vs_crtc *vs_crtc = to_vs_crtc(crtc);
struct device *dev = vs_crtc->dev;
struct drm_property_blob *blob = new_state->gamma_lut;
struct drm_color_lut *lut;
struct vs_dc *dc = dev_get_drvdata(dev);
if (new_state->color_mgmt_changed) {
if (blob && blob->length) {
lut = blob->data;
vs_dc_set_gamma(dc, crtc, lut,
blob->length / sizeof(*lut));
vs_dc_enable_gamma(dc, crtc, true);
} else {
vs_dc_enable_gamma(dc, crtc, false);
}
}
}
static void vs_crtc_atomic_flush(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
struct vs_crtc *vs_crtc = to_vs_crtc(crtc);
struct drm_pending_vblank_event *event = crtc->state->event;
struct vs_dc *dc = dev_get_drvdata(vs_crtc->dev);
vs_dc_commit(dc);
if (event) {
WARN_ON(drm_crtc_vblank_get(crtc) != 0);
spin_lock_irq(&crtc->dev->event_lock);
drm_crtc_arm_vblank_event(crtc, event);
crtc->state->event = NULL;
spin_unlock_irq(&crtc->dev->event_lock);
}
}
static const struct drm_crtc_helper_funcs vs_crtc_helper_funcs = {
.atomic_check = drm_crtc_helper_atomic_check,
.atomic_enable = vs_crtc_atomic_enable,
.atomic_disable = vs_crtc_atomic_disable,
.atomic_begin = vs_crtc_atomic_begin,
.atomic_flush = vs_crtc_atomic_flush,
};
struct vs_crtc *vs_crtc_create(struct drm_device *drm_dev,
struct vs_dc_info *info)
{
struct vs_crtc *crtc;
int ret;
if (!info)
return NULL;
crtc = drmm_crtc_alloc_with_planes(drm_dev, struct vs_crtc, base, NULL,
NULL, &vs_crtc_funcs,
info->name ? info->name : NULL);
drm_crtc_helper_add(&crtc->base, &vs_crtc_helper_funcs);
if (info->gamma_size) {
ret = drm_mode_crtc_set_gamma_size(&crtc->base,
info->gamma_size);
if (ret)
return NULL;
drm_crtc_enable_color_mgmt(&crtc->base, 0, false,
info->gamma_size);
}
crtc->max_bpc = info->max_bpc;
crtc->color_formats = info->color_formats;
return crtc;
}
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