// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2014, The Linux Foundation. All rights reserved.
* Copyright (C) 2013 Red Hat
* Author: Rob Clark <robdclark@gmail.com>
*/
#include <linux/delay.h>
#include <linux/interconnect.h>
#include <linux/of_irq.h>
#include <drm/drm_debugfs.h>
#include <drm/drm_drv.h>
#include <drm/drm_file.h>
#include <drm/drm_vblank.h>
#include "msm_drv.h"
#include "msm_gem.h"
#include "msm_mmu.h"
#include "mdp5_kms.h"
static int mdp5_hw_init(struct msm_kms *kms)
{
struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
struct device *dev = &mdp5_kms->pdev->dev;
unsigned long flags;
pm_runtime_get_sync(dev);
/* Magic unknown register writes:
*
* W VBIF:0x004 00000001 (mdss_mdp.c:839)
* W MDP5:0x2e0 0xe9 (mdss_mdp.c:839)
* W MDP5:0x2e4 0x55 (mdss_mdp.c:839)
* W MDP5:0x3ac 0xc0000ccc (mdss_mdp.c:839)
* W MDP5:0x3b4 0xc0000ccc (mdss_mdp.c:839)
* W MDP5:0x3bc 0xcccccc (mdss_mdp.c:839)
* W MDP5:0x4a8 0xcccc0c0 (mdss_mdp.c:839)
* W MDP5:0x4b0 0xccccc0c0 (mdss_mdp.c:839)
* W MDP5:0x4b8 0xccccc000 (mdss_mdp.c:839)
*
* Downstream fbdev driver gets these register offsets/values
* from DT.. not really sure what these registers are or if
* different values for different boards/SoC's, etc. I guess
* they are the golden registers.
*
* Not setting these does not seem to cause any problem. But
* we may be getting lucky with the bootloader initializing
* them for us. OTOH, if we can always count on the bootloader
* setting the golden registers, then perhaps we don't need to
* care.
*/
spin_lock_irqsave(&mdp5_kms->resource_lock, flags);
mdp5_write(mdp5_kms, REG_MDP5_DISP_INTF_SEL, 0);
spin_unlock_irqrestore(&mdp5_kms->resource_lock, flags);
mdp5_ctlm_hw_reset(mdp5_kms->ctlm);
pm_runtime_put_sync(dev);
return 0;
}
/* Global/shared object state funcs */
/*
* This is a helper that returns the private state currently in operation.
* Note that this would return the "old_state" if called in the atomic check
* path, and the "new_state" after the atomic swap has been done.
*/
struct mdp5_global_state *
mdp5_get_existing_global_state(struct mdp5_kms *mdp5_kms)
{
return to_mdp5_global_state(mdp5_kms->glob_state.state);
}
/*
* This acquires the modeset lock set aside for global state, creates
* a new duplicated private object state.
*/
struct mdp5_global_state *mdp5_get_global_state(struct drm_atomic_state *s)
{
struct msm_drm_private *priv = s->dev->dev_private;
struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(priv->kms));
struct drm_private_state *priv_state;
int ret;
ret = drm_modeset_lock(&mdp5_kms->glob_state_lock, s->acquire_ctx);
if (ret)
return ERR_PTR(ret);
priv_state = drm_atomic_get_private_obj_state(s, &mdp5_kms->glob_state);
if (IS_ERR(priv_state))
return ERR_CAST(priv_state);
return to_mdp5_global_state(priv_state);
}
static struct drm_private_state *
mdp5_global_duplicate_state(struct drm_private_obj *obj)
{
struct mdp5_global_state *state;
state = kmemdup(obj->state, sizeof(*state), GFP_KERNEL);
if (!state)
return NULL;
__drm_atomic_helper_private_obj_duplicate_state(obj, &state->base);
return &state->base;
}
static void mdp5_global_destroy_state(struct drm_private_obj *obj,
struct drm_private_state *state)
{
struct mdp5_global_state *mdp5_state = to_mdp5_global_state(state);
kfree(mdp5_state);
}
static const struct drm_private_state_funcs mdp5_global_state_funcs = {
.atomic_duplicate_state = mdp5_global_duplicate_state,
.atomic_destroy_state = mdp5_global_destroy_state,
};
static int mdp5_global_obj_init(struct mdp5_kms *mdp5_kms)
{
struct mdp5_global_state *state;
drm_modeset_lock_init(&mdp5_kms->glob_state_lock);
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (!state)
return -ENOMEM;
state->mdp5_kms = mdp5_kms;
drm_atomic_private_obj_init(mdp5_kms->dev, &mdp5_kms->glob_state,
&state->base,
&mdp5_global_state_funcs);
return 0;
}
static void mdp5_enable_commit(struct msm_kms *kms)
{
struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
pm_runtime_get_sync(&mdp5_kms->pdev->dev);
}
static void mdp5_disable_commit(struct msm_kms *kms)
{
struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));