// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) STMicroelectronics SA 2014
* Authors: Benjamin Gaignard <[email protected]>
* Fabien Dessenne <[email protected]>
* for STMicroelectronics.
*/
#include <linux/clk.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_device.h>
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>
#include "sti_compositor.h"
#include "sti_crtc.h"
#include "sti_drv.h"
#include "sti_vid.h"
#include "sti_vtg.h"
static void sti_crtc_atomic_enable(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
struct sti_mixer *mixer = to_sti_mixer(crtc);
DRM_DEBUG_DRIVER("\n");
mixer->status = STI_MIXER_READY;
drm_crtc_vblank_on(crtc);
}
static void sti_crtc_atomic_disable(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
struct sti_mixer *mixer = to_sti_mixer(crtc);
DRM_DEBUG_DRIVER("\n");
mixer->status = STI_MIXER_DISABLING;
drm_crtc_wait_one_vblank(crtc);
}
static int
sti_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode)
{
struct sti_mixer *mixer = to_sti_mixer(crtc);
struct device *dev = mixer->dev;
struct sti_compositor *compo = dev_get_drvdata(dev);
struct clk *compo_clk, *pix_clk;
int rate = mode->clock * 1000;
DRM_DEBUG_KMS("CRTC:%d (%s) mode: (%s)\n",
crtc->base.id, sti_mixer_to_str(mixer), mode->name);
DRM_DEBUG_KMS(DRM_MODE_FMT "\n", DRM_MODE_ARG(mode));
if (mixer->id == STI_MIXER_MAIN) {
compo_clk = compo->clk_compo_main;
pix_clk = compo->clk_pix_main;
} else {
compo_clk = compo->clk_compo_aux;
pix_clk = compo->clk_pix_aux;
}
/* Prepare and enable the compo IP clock */
if (clk_prepare_enable(compo_clk)) {
DRM_INFO("Failed to prepare/enable compositor clk\n");
goto compo_error;
}
/* Set rate and prepare/enable pixel clock */
if (clk_set_rate(pix_clk, rate) < 0) {
DRM_ERROR("Cannot set rate (%dHz) for pix clk\n", rate);
goto pix_error;
}
if (clk_prepare_enable(pix_clk)) {
DRM_ERROR("Failed to prepare/enable pix clk\n");
goto pix_error;
}
sti_vtg_set_config(compo->vtg[mixer->id], &crtc->mode);
if (sti_mixer_active_video_area(mixer, &crtc->mode)) {
DRM_ERROR("Can't set active video area\n");
goto mixer_error;
}
return 0;
mixer_error:
clk_disable_unprepare(pix_clk);
pix_error:
clk_disable_unprepare(compo_clk);
compo_error:
return -EINVAL;
}
static void sti_crtc_disable(struct drm_crtc *crtc)
{
struct sti_mixer *mixer = to_sti_mixer(crtc);
struct device *dev = mixer->dev;
struct sti_compositor *compo = dev_get_drvdata(dev);
DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer));
/* Disable Background */
sti_mixer_set_background_status(mixer, false);
drm_crtc_vblank_off(crtc);
/* Disable pixel clock and compo IP clocks */
if (mixer->id == STI_MIXER_MAIN) {
clk_disable_unprepare(compo->clk_pix_main);
clk_disable_unprepare(compo->clk_compo_main);
} else {
clk_disable_unprepare(compo->clk_pix_aux);
clk_disable_unprepare(compo->clk_compo_aux);
}
mixer->status = STI_MIXER_DISABLED;
}
static void
sti_crtc_mode_set_nofb(struct drm_crtc *crtc)
{
sti_crtc_mode_set(crtc, &crtc->state->adjusted_mode);
}
static void sti_crtc_atomic_flush(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
struct drm_device *drm_dev = crtc->dev;
struct sti_mixer *mixer = to_sti_mixer(crtc);
struct sti_compositor *compo = dev_get_drvdata(mixer->dev);
struct drm_plane *p;
struct drm_pending_vblank_event *event;
unsigned long flags;
DRM_DEBUG_DRIVER("\n");
/* perform plane actions */
list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
struct sti_plane *plane = to_sti_plane(p);
switch (plane->status) {
case STI_PLANE_UPDATED:
/* ignore update for other CRTC */
if (p->state->crtc != crtc)
continue;
/* update planes tag as updated */
DRM_DEBUG_DRIVER("update plane %s\n",
sti_plane_to_str(plane));
if (sti_mixer_set_plane_depth(mixer, plane)) {
DRM_ERROR("Cannot set plane %s depth\n",
sti_plane_to_str(plane));
break;
}
if (sti_mixer_set_plane_status(mixer, plane, true)) {
DRM_ERROR("Cannot enable plane %s at mixer\n",
sti_plane_to_str(plane));
break;
}
/* if plane is HQVDP_0 then commit the vid[0] */
if (plane->desc == STI_HQVDP_0)
sti_vid_commit(compo->vid[0], p->state);
plane->status = STI_PLANE_READY;
break;
case STI_PLANE_DISABLING:
/* disabling sequence for planes tag as disabling */
DRM_DEBUG_DRIVER("disable plane %s from mixer\n",
sti_plane_to_str(plane));
if (sti_mixer_set_plane_status(mixer, plane, false)) {
DRM_ERROR("Cannot disable plane %s at mixer\n",
sti_plane_to_str(plane));
continue;
}
if (plane->desc == STI_CURSOR)
/* tag plane status for disabled */
plane->status = STI_PLANE_DISABLED;
else
/* tag plane status for flushing */
plane->status = STI_PLANE_FLUSHING;
/* if plane is HQVDP_0 then disable the vid[0] */
if (plane->desc == STI_HQVDP_0)
sti_vid_disable(compo->vid[0]);
break;
default:
/* Other status case are not handled */
break;
}
}
event = crtc->state->event;
if (event) {
crtc->state->event = NULL;
spin_lock_irqsave(&crtc->dev->event_lock, flags);
if (drm_crtc_vblank_get(crtc) == 0)
drm_crtc_arm_vblank_event(crtc, event);
else
drm_crtc_send_vblank_event(crtc, event);
spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
}
}
static const struct drm_crtc_helper_funcs sti_crtc_helper_funcs = {
.mode_set_nofb = sti_crtc_mode_set_nofb,
.atomic_flush = sti_crtc_atomic_flush,
.atomic_enable = sti_crtc_atomic_enable,
.atomic_disable = sti_crtc_atomic_disable,
};
static void sti_crtc_destroy(struct drm_crtc *crtc)
{
DRM_DEBUG_KMS("\n");
drm_crtc_cleanup(crtc);
}
static int sti_crtc_set_property(struct drm_crtc *crtc,
struct drm_property *property,
uint64_t val)
{
DRM_DEBUG_KMS("\n");
return 0;
}
int sti_crtc_vblank_cb(struct notifier_block *nb,
unsigned long event, void *data)
{
struct sti_compositor *compo;
struct drm_crtc *crtc = data;
struct sti_mixer *mixer;
unsigned int pipe;
pipe = drm_crtc_index(crtc);
compo = container_of(nb, struct sti_compositor, vtg_vblank_nb[pipe]);
mixer = compo->mixer[pipe];
if ((event != VTG_TOP_FIELD_EVENT) &&
(event != VTG_BOTTOM_FIELD_EVENT)) {
DRM_ERROR("unknown event: %lu\n", event);
return -EINVAL;
}
drm_crtc_handle_vblank(crtc);
if (mixer->status == STI_MIXER_DISABLING) {
struct drm_plane *p;
/* Disable mixer only if all overlay planes (GDP and VDP)
* are disabled */
list_for_each_entry(p, &crtc->dev->mode_config.plane_list,
head) {
struct sti_plane *plane = to_sti_plane(p);
if ((plane->desc & STI_PLANE_TYPE_MASK) <= STI_VDP)
if (plane->status != STI_PLANE_DISABLED)
return 0;
}
sti_crtc_disable(crtc);
}
return 0;
}
static int sti_crtc_enable_vblank(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
unsigned int pipe = crtc->index;
struct sti_private *dev_priv = dev->dev_private;
struct sti_compositor *compo = dev_priv->compo;
struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb[pipe];
struct sti_vtg *vtg = compo->vtg[pipe];
DRM_DEBUG_DRIVER("\n");
if (sti_vtg_register_client(vtg, vtg_vblank_nb, crtc)) {
DRM_ERROR("Cannot register VTG notifier\n");
return -EINVAL;
}
return 0;
}
static void sti_crtc_disable_vblank(struct drm_crtc *crtc)
{
struct drm_device *drm_dev = crtc->dev;
unsigned int pipe = crtc->index;
struct sti_private *priv = drm_dev->dev_private;
struct sti_compositor *compo = priv->compo;
struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb[pipe];
struct sti_vtg *vtg = compo->vtg[pipe];
DRM_DEBUG_DRIVER("\n");
if (sti_vtg_unregister_client(vtg, vtg_vblank_nb))
DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n");
}
static int sti_crtc_late_register(struct drm_crtc *crtc)
{
struct sti_mixer *mixer = to_sti_mixer(crtc);
struct sti_compositor *compo = dev_get_drvdata(mixer->dev);
if (drm_crtc_index(crtc) == 0)
sti_compositor_debugfs_init(compo, crtc->dev->primary);
return 0;
}
static const struct drm_crtc_funcs sti_crtc_funcs = {
.set_config = drm_atomic_helper_set_config,
.page_flip = drm_atomic_helper_page_flip,
.destroy = sti_crtc_destroy,
.set_property = sti_crtc_set_property,
.reset = drm_atomic_helper_crtc_reset,
.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
.late_register = sti_crtc_late_register,
.enable_vblank = sti_crtc_enable_vblank,
.disable_vblank = sti_crtc_disable_vblank,
};
bool sti_crtc_is_main(struct drm_crtc *crtc)
{
struct sti_mixer *mixer = to_sti_mixer(crtc);
if (mixer->id == STI_MIXER_MAIN)
return true;
return false;
}
int sti_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer,
struct drm_plane *primary, struct drm_plane *cursor)
{
struct drm_crtc *crtc = &mixer->drm_crtc;
int res;
res = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor,
&sti_crtc_funcs, NULL);
if (res) {
DRM_ERROR("Can't initialize CRTC\n");
return -EINVAL;
}
drm_crtc_helper_add(crtc, &sti_crtc_helper_funcs);
DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n",
crtc->base.id, sti_mixer_to_str(mixer));
return 0;
}
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