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* Copyright (c) 2015 MediaTek Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <asm/barrier.h>
#include <drm/drmP.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_plane_helper.h>
#include <linux/clk.h>
#include <linux/pm_runtime.h>
#include <soc/mediatek/smi.h>
#include "mtk_drm_drv.h"
#include "mtk_drm_crtc.h"
#include "mtk_drm_ddp.h"
#include "mtk_drm_ddp_comp.h"
#include "mtk_drm_gem.h"
#include "mtk_drm_plane.h"
/**
* struct mtk_drm_crtc - MediaTek specific crtc structure.
* @base: crtc object.
* @enabled: records whether crtc_enable succeeded
* @planes: array of 4 mtk_drm_plane structures, one for each overlay plane
* @pending_planes: whether any plane has pending changes to be applied
* @config_regs: memory mapped mmsys configuration register space
* @mutex: handle to one of the ten disp_mutex streams
* @ddp_comp_nr: number of components in ddp_comp
* @ddp_comp: array of pointers the mtk_ddp_comp structures used by this crtc
*/
struct mtk_drm_crtc {
struct drm_crtc base;
bool enabled;
bool pending_needs_vblank;
struct drm_pending_vblank_event *event;
struct mtk_drm_plane planes[OVL_LAYER_NR];
bool pending_planes;
void __iomem *config_regs;
struct mtk_disp_mutex *mutex;
unsigned int ddp_comp_nr;
struct mtk_ddp_comp **ddp_comp;
};
struct mtk_crtc_state {
struct drm_crtc_state base;
bool pending_config;
unsigned int pending_width;
unsigned int pending_height;
unsigned int pending_vrefresh;
};
static inline struct mtk_drm_crtc *to_mtk_crtc(struct drm_crtc *c)
{
return container_of(c, struct mtk_drm_crtc, base);
}
static inline struct mtk_crtc_state *to_mtk_crtc_state(struct drm_crtc_state *s)
{
return container_of(s, struct mtk_crtc_state, base);
}
static void mtk_drm_crtc_finish_page_flip(struct mtk_drm_crtc *mtk_crtc)
{
struct drm_crtc *crtc = &mtk_crtc->base;
unsigned long flags;
spin_lock_irqsave(&crtc->dev->event_lock, flags);
drm_crtc_send_vblank_event(crtc, mtk_crtc->event);
drm_crtc_vblank_put(crtc);
mtk_crtc->event = NULL;
spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
}
static void mtk_drm_finish_page_flip(struct mtk_drm_crtc *mtk_crtc)
{
drm_crtc_handle_vblank(&mtk_crtc->base);
if (mtk_crtc->pending_needs_vblank) {
mtk_drm_crtc_finish_page_flip(mtk_crtc);
mtk_crtc->pending_needs_vblank = false;
}
}
static void mtk_drm_crtc_destroy(struct drm_crtc *crtc)
{
struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
int i;
for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
clk_unprepare(mtk_crtc->ddp_comp[i]->clk);
mtk_disp_mutex_put(mtk_crtc->mutex);
drm_crtc_cleanup(crtc);
}
static void mtk_drm_crtc_reset(struct drm_crtc *crtc)
{
struct mtk_crtc_state *state;
if (crtc->state) {
if (crtc->state->mode_blob)
drm_property_unreference_blob(crtc->state->mode_blob);
state = to_mtk_crtc_state(crtc->state);
memset(state, 0, sizeof(*state));
} else {
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (!state)
return;
crtc->state = &state->base;
}
state->base.crtc = crtc;
}
static struct drm_crtc_state *mtk_drm_crtc_duplicate_state(struct drm_crtc *crtc)
{
struct mtk_crtc_state *state;
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (!state)
return NULL;
__drm_atomic_helper_crtc_duplicate_state(crtc, &state->base);
WARN_ON(state->base.crtc != crtc);
state->base.crtc = crtc;
return &state->base;
}
static void mtk_drm_crtc_destroy_state(struct drm_crtc *crtc,
struct drm_crtc_state *state)
{
__drm_atomic_helper_crtc_destroy_state(state);
kfree(to_mtk_crtc_state(state));
}
static bool mtk_drm_crtc_mode_fixup(struct drm_crtc *crtc,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
/* Nothing to do here, but this callback is mandatory. */
return true;
}
static void mtk_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
{
struct mtk_crtc_state *state = to_mtk_crtc_state(crtc->state);
state->pending_width = crtc->mode.hdisplay;
state->pending_height = crtc->mode.vdisplay;
state->pending_vrefresh = crtc->mode.vrefresh;
wmb(); /* Make sure the above parameters are set before update */
state->pending_config = true;
}
int mtk_drm_crtc_enable_vblank(struct drm_device *drm, unsigned int pipe)
{
struct mtk_drm_private *priv = drm->dev_private;
struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(priv->crtc[pipe]);
struct mtk_ddp_comp *ovl = mtk_crtc->ddp_comp[0];
mtk_ddp_comp_enable_vblank(ovl, &mtk_crtc->base);
return 0;
}
void mtk_drm_crtc_disable_vblank(struct drm_device *drm, unsigned int pipe)
{
struct mtk_drm_private *priv = drm->dev_private;
struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(priv->crtc[pipe]);
struct mtk_ddp_comp *ovl = mtk_crtc->ddp_comp[0];
mtk_ddp_comp_disable_vblank(ovl);
}
static int mtk_crtc_ddp_clk_enable(struct mtk_drm_crtc *mtk_crtc)
{
int ret;
int i;
DRM_DEBUG_DRIVER("%s\n", __func__);
for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
ret = clk_enable(mtk_crtc->ddp_comp[i]->clk);
if (ret) {
DRM_ERROR("Failed to enable clock %d: %d\n", i, ret);
goto err;
}
}
return 0;
err:
while (--i >= 0)
clk_disable(mtk_crtc->ddp_comp[i]->clk);
return ret;
}
static void mtk_crtc_ddp_clk_disable(struct mtk_drm_crtc *mtk_crtc)
{
int i;
DRM_DEBUG_DRIVER("%s\n", __func__);
for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
clk_disable(mtk_crtc->ddp_comp[i]->clk);
}
static int mtk_crtc_ddp_hw_init(struct mtk_drm_crtc *mtk_crtc)
{
struct drm_crtc *crtc = &mtk_crtc->base;
unsigned int width, height, vrefresh;
int ret;
int i;
DRM_DEBUG_DRIVER("%s\n", __func__);
if (WARN_ON(!crtc->state))
return -EINVAL;
width = crtc->state->adjusted_mode.hdisplay;
height = crtc->state->adjusted_mode.vdisplay;
vrefresh = crtc->state->adjusted_mode.vrefresh;
ret = pm_runtime_get_sync(crtc->dev->dev);
if (ret < 0) {
DRM_ERROR("Failed to enable power domain: %d\n", ret);
return ret;
}
ret = mtk_disp_mutex_prepare(mtk_crtc->mutex);
if (ret < 0) {
DRM_ERROR("Failed to enable mutex clock: %d\n", ret);
goto err_pm_runtime_put;
}
ret = mtk_crtc_ddp_clk_enable(mtk_crtc);
if (ret < 0) {
DRM_ERROR("Failed to enable component clocks: %d\n", ret);
goto err_mutex_unprepare;
}
DRM_DEBUG_DRIVER("mediatek_ddp_ddp_path_setup\n");
for (i = 0; i < mtk_crtc->ddp_comp_nr - 1; i++) {
mtk_ddp_add_comp_to_path(mtk_crtc->config_regs,
mtk_crtc->ddp_comp[i]->id,
mtk_crtc->ddp_comp[i + 1]->id);
mtk_disp_mutex_add_comp(mtk_crtc->mutex,
mtk_crtc->ddp_comp[i]->id);
}
mtk_disp_mutex_add_comp(mtk_crtc->mutex, mtk_crtc->ddp_comp[i]->id);
mtk_disp_mutex_enable(mtk_crtc->mutex);
for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[i];
mtk_ddp_comp_config(comp, width, height, vrefresh);
mtk_ddp_comp_start(comp);
}
/* Initially configure all planes */
for (i = 0; i < OVL_LAYER_NR; i++) {
struct drm_plane *plane = &mtk_crtc->planes[i].base;
struct mtk_plane_state *plane_state;
plane_state = to_mtk_plane_state(plane->state);
mtk_ddp_comp_layer_config(mtk_crtc->ddp_comp[0], i,
plane_state);
}
return 0;
err_mutex_unprepare:
mtk_disp_mutex_unprepare(mtk_crtc->mutex);
err_pm_runtime_put:
pm_runtime_put(crtc->dev->dev);
return ret;
}
static void mtk_crtc_ddp_hw_fini(struct mtk_drm_crtc *mtk_crtc)
{
struct drm_device *drm = mtk_crtc->base.dev;
int i;
DRM_DEBUG_DRIVER("%s\n", __func__);
for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
mtk_ddp_comp_stop(mtk_crtc->ddp_comp[i]);
for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
mtk_disp_mutex_remove_comp(mtk_crtc->mutex,
mtk_crtc->ddp_comp[i]->id);
mtk_disp_mutex_disable(mtk_crtc->mutex);
for (i = 0; i < mtk_crtc->ddp_comp_nr - 1; i++) {
mtk_ddp_remove_comp_from_path(mtk_crtc->config_regs,
mtk_crtc->ddp_comp[i]->id,
mtk_crtc->ddp_comp[i + 1]->id);
mtk_disp_mutex_remove_comp(mtk_crtc->mutex,
mtk_crtc->ddp_comp[i]->id);
}
mtk_disp_mutex_remove_comp(mtk_crtc->mutex, mtk_crtc->ddp_comp[i]->id);
mtk_crtc_ddp_clk_disable(mtk_crtc);
mtk_disp_mutex_unprepare(mtk_crtc->mutex);
pm_runtime_put(drm->dev);
}
static void mtk_drm_crtc_enable(struct drm_crtc *crtc)
{
struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
struct mtk_ddp_comp *ovl = mtk_crtc->ddp_comp[0];
int ret;
DRM_DEBUG_DRIVER("%s %d\n", __func__, crtc->base.id);
ret = mtk_smi_larb_get(ovl->larb_dev);
if (ret) {
DRM_ERROR("Failed to get larb: %d\n", ret);
return;
}
ret = mtk_crtc_ddp_hw_init(mtk_crtc);
if (ret) {
mtk_smi_larb_put(ovl->larb_dev);
return;
}
drm_crtc_vblank_on(crtc);
mtk_crtc->enabled = true;
}
static void mtk_drm_crtc_disable(struct drm_crtc *crtc)
{
struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
struct mtk_ddp_comp *ovl = mtk_crtc->ddp_comp[0];
int i;
DRM_DEBUG_DRIVER("%s %d\n", __func__, crtc->base.id);
if (!mtk_crtc->enabled)
return;
/* Set all pending plane state to disabled */
for (i = 0; i < OVL_LAYER_NR; i++) {
struct drm_plane *plane = &mtk_crtc->planes[i].base;
struct mtk_plane_state *plane_state;
plane_state = to_mtk_plane_state(plane->state);
plane_state->pending.enable = false;
plane_state->pending.config = true;
}
mtk_crtc->pending_planes = true;
/* Wait for planes to be disabled */
drm_crtc_wait_one_vblank(crtc);
drm_crtc_vblank_off(crtc);
mtk_crtc_ddp_hw_fini(mtk_crtc);
mtk_smi_larb_put(ovl->larb_dev);
mtk_crtc->enabled = false;
}
static void mtk_drm_crtc_atomic_begin(struct drm_crtc *crtc,
struct drm_crtc_state *old_crtc_state)
{
struct mtk_crtc_state *state = to_mtk_crtc_state(crtc->state);
struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
if (mtk_crtc->event && state->base.event)
DRM_ERROR("new event while there is still a pending event\n");
if (state->base.event) {
state->base.event->pipe = drm_crtc_index(crtc);
WARN_ON(drm_crtc_vblank_get(crtc) != 0);
mtk_crtc->event = state->base.event;
state->base.event = NULL;
}
}
static void mtk_drm_crtc_atomic_flush(struct drm_crtc *crtc,
struct drm_crtc_state *old_crtc_state)
{
struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
unsigned int pending_planes = 0;
int i;
if (mtk_crtc->event)
mtk_crtc->pending_needs_vblank = true;
for (i = 0; i < OVL_LAYER_NR; i++) {
struct drm_plane *plane = &mtk_crtc->planes[i].base;
struct mtk_plane_state *plane_state;
plane_state = to_mtk_plane_state(plane->state);
if (plane_state->pending.dirty) {
plane_state->pending.config = true;
plane_state->pending.dirty = false;
pending_planes |= BIT(i);
}
}
if (pending_planes)
mtk_crtc->pending_planes = true;
}
static const struct drm_crtc_funcs mtk_crtc_funcs = {
.set_config = drm_atomic_helper_set_config,
.page_flip = drm_atomic_helper_page_flip,
.destroy = mtk_drm_crtc_destroy,
.reset = mtk_drm_crtc_reset,
.atomic_duplicate_state = mtk_drm_crtc_duplicate_state,
.atomic_destroy_state = mtk_drm_crtc_destroy_state,
};
static const struct drm_crtc_helper_funcs mtk_crtc_helper_funcs = {
.mode_fixup = mtk_drm_crtc_mode_fixup,
.mode_set_nofb = mtk_drm_crtc_mode_set_nofb,
.enable = mtk_drm_crtc_enable,
.disable = mtk_drm_crtc_disable,
.atomic_begin = mtk_drm_crtc_atomic_begin,
.atomic_flush = mtk_drm_crtc_atomic_flush,
};
static int mtk_drm_crtc_init(struct drm_device *drm,
struct mtk_drm_crtc *mtk_crtc,
struct drm_plane *primary,
struct drm_plane *cursor, unsigned int pipe)
{
int ret;
ret = drm_crtc_init_with_planes(drm, &mtk_crtc->base, primary, cursor,
&mtk_crtc_funcs, NULL);
if (ret)
goto err_cleanup_crtc;
drm_crtc_helper_add(&mtk_crtc->base, &mtk_crtc_helper_funcs);
return 0;
err_cleanup_crtc:
drm_crtc_cleanup(&mtk_crtc->base);
return ret;
}
void mtk_crtc_ddp_irq(struct drm_crtc *crtc, struct mtk_ddp_comp *ovl)
{
struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
struct mtk_crtc_state *state = to_mtk_crtc_state(mtk_crtc->base.state);
unsigned int i;
/*
* TODO: instead of updating the registers here, we should prepare
* working registers in atomic_commit and let the hardware command
* queue update module registers on vblank.
*/
if (state->pending_config) {
mtk_ddp_comp_config(ovl, state->pending_width,
state->pending_height,
state->pending_vrefresh);
state->pending_config = false;
}
if (mtk_crtc->pending_planes) {
for (i = 0; i < OVL_LAYER_NR; i++) {
struct drm_plane *plane = &mtk_crtc->planes[i].base;
struct mtk_plane_state *plane_state;
plane_state = to_mtk_plane_state(plane->state);
if (plane_state->pending.config) {
mtk_ddp_comp_layer_config(ovl, i, plane_state);
plane_state->pending.config = false;
}
}
mtk_crtc->pending_planes = false;
}
mtk_drm_finish_page_flip(mtk_crtc);
}
int mtk_drm_crtc_create(struct drm_device *drm_dev,
const enum mtk_ddp_comp_id *path, unsigned int path_len)
{
struct mtk_drm_private *priv = drm_dev->dev_private;
struct device *dev = drm_dev->dev;
struct mtk_drm_crtc *mtk_crtc;
enum drm_plane_type type;
unsigned int zpos;
int pipe = priv->num_pipes;
int ret;
int i;
for (i = 0; i < path_len; i++) {
enum mtk_ddp_comp_id comp_id = path[i];
struct device_node *node;
node = priv->comp_node[comp_id];
if (!node) {
dev_info(dev,
"Not creating crtc %d because component %d is disabled or missing\n",
pipe, comp_id);
return 0;
}
}
mtk_crtc = devm_kzalloc(dev, sizeof(*mtk_crtc), GFP_KERNEL);
if (!mtk_crtc)
return -ENOMEM;
mtk_crtc->config_regs = priv->config_regs;
mtk_crtc->ddp_comp_nr = path_len;
mtk_crtc->ddp_comp = devm_kmalloc_array(dev, mtk_crtc->ddp_comp_nr,
sizeof(*mtk_crtc->ddp_comp),
GFP_KERNEL);
mtk_crtc->mutex = mtk_disp_mutex_get(priv->mutex_dev, pipe);
if (IS_ERR(mtk_crtc->mutex)) {
ret = PTR_ERR(mtk_crtc->mutex);
dev_err(dev, "Failed to get mutex: %d\n", ret);
return ret;
}
for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
enum mtk_ddp_comp_id comp_id = path[i];
struct mtk_ddp_comp *comp;
struct device_node *node;
node = priv->comp_node[comp_id];
comp = priv->ddp_comp[comp_id];
if (!comp) {
dev_err(dev, "Component %s not initialized\n",
node->full_name);
ret = -ENODEV;
goto unprepare;
}
ret = clk_prepare(comp->clk);
if (ret) {
dev_err(dev,
"Failed to prepare clock for component %s: %d\n",
node->full_name, ret);
goto unprepare;
}
mtk_crtc->ddp_comp[i] = comp;
}
for (zpos = 0; zpos < OVL_LAYER_NR; zpos++) {
type = (zpos == 0) ? DRM_PLANE_TYPE_PRIMARY :
(zpos == 1) ? DRM_PLANE_TYPE_CURSOR :
DRM_PLANE_TYPE_OVERLAY;
ret = mtk_plane_init(drm_dev, &mtk_crtc->planes[zpos],
BIT(pipe), type, zpos);
if (ret)
goto unprepare;
}
ret = mtk_drm_crtc_init(drm_dev, mtk_crtc, &mtk_crtc->planes[0].base,
&mtk_crtc->planes[1].base, pipe);
if (ret < 0)
goto unprepare;
priv->crtc[pipe] = &mtk_crtc->base;
priv->num_pipes++;
return 0;
unprepare:
while (--i >= 0)
clk_unprepare(mtk_crtc->ddp_comp[i]->clk);
return ret;
}
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