blob: 93b7f09b96ca95041ee25760df81d2e4c1f19547 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0
/*
* (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
* Author: James.Qian.Wang <james.qian.wang@arm.com>
*
*/
#include <linux/component.h>
#include <linux/interrupt.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_managed.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>
#include "komeda_dev.h"
#include "komeda_framebuffer.h"
#include "komeda_kms.h"
DEFINE_DRM_GEM_CMA_FOPS(komeda_cma_fops);
static int komeda_gem_cma_dumb_create(struct drm_file *file,
struct drm_device *dev,
struct drm_mode_create_dumb *args)
{
struct komeda_dev *mdev = dev->dev_private;
u32 pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
args->pitch = ALIGN(pitch, mdev->chip.bus_width);
return drm_gem_cma_dumb_create_internal(file, dev, args);
}
static irqreturn_t komeda_kms_irq_handler(int irq, void *data)
{
struct drm_device *drm = data;
struct komeda_dev *mdev = drm->dev_private;
struct komeda_kms_dev *kms = to_kdev(drm);
struct komeda_events evts;
irqreturn_t status;
u32 i;
/* Call into the CHIP to recognize events */
memset(&evts, 0, sizeof(evts));
status = mdev->funcs->irq_handler(mdev, &evts);
komeda_print_events(&evts, drm);
/* Notify the crtc to handle the events */
for (i = 0; i < kms->n_crtcs; i++)
komeda_crtc_handle_event(&kms->crtcs[i], &evts);
return status;
}
static const struct drm_driver komeda_kms_driver = {
.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
.lastclose = drm_fb_helper_lastclose,
DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE(komeda_gem_cma_dumb_create),
.fops = &komeda_cma_fops,
.name = "komeda",
.desc = "Arm Komeda Display Processor driver",
.date = "20181101",
.major = 0,
.minor = 1,
};
static void komeda_kms_commit_tail(struct drm_atomic_state *old_state)
{
struct drm_device *dev = old_state->dev;
bool fence_cookie = dma_fence_begin_signalling();
drm_atomic_helper_commit_modeset_disables(dev, old_state);
drm_atomic_helper_commit_planes(dev, old_state,
DRM_PLANE_COMMIT_ACTIVE_ONLY);
drm_atomic_helper_commit_modeset_enables(dev, old_state);
drm_atomic_helper_commit_hw_done(old_state);
drm_atomic_helper_wait_for_flip_done(dev, old_state);
dma_fence_end_signalling(fence_cookie);
drm_atomic_helper_cleanup_planes(dev, old_state);
}
static const struct drm_mode_config_helper_funcs komeda_mode_config_helpers = {
.atomic_commit_tail = komeda_kms_commit_tail,
};
static int komeda_plane_state_list_add(struct drm_plane_state *plane_st,
struct list_head *zorder_list)
{
struct komeda_plane_state *new = to_kplane_st(plane_st);
struct komeda_plane_state *node, *last;
last = list_empty(zorder_list) ?
NULL : list_last_entry(zorder_list, typeof(*last), zlist_node);
/* Considering the list sequence is zpos increasing, so if list is empty
* or the zpos of new node bigger than the last node in list, no need
* loop and just insert the new one to the tail of the list.
*/
if (!last || (new->base.zpos > last->base.zpos)) {
list_add_tail(&new->zlist_node, zorder_list);
return 0;
}
/* Build the list by zpos increasing */
list_for_each_entry(node, zorder_list, zlist_node) {
if (new->base.zpos < node->base.zpos) {
list_add_tail(&new->zlist_node, &node->zlist_node);
break;
} else if (node->base.zpos == new->base.zpos) {
struct drm_plane *a = node->base.plane;
struct drm_plane *b = new->base.plane;
/* Komeda doesn't support setting a same zpos for
* different planes.
*/
DRM_DEBUG_ATOMIC("PLANE: %s and PLANE: %s are configured same zpos: %d.\n",
a->name, b->name, node->base.zpos);
return -EINVAL;
}
}
return 0;
}
static int komeda_crtc_normalize_zpos(struct drm_crtc *crtc,
struct drm_crtc_state *crtc_st)
{
struct drm_atomic_state *state = crtc_st->state;
struct komeda_crtc *kcrtc = to_kcrtc(crtc);
struct komeda_crtc_state *kcrtc_st = to_kcrtc_st(crtc_st);
struct komeda_plane_state *kplane_st;
struct drm_plane_state *plane_st;
struct drm_plane *plane;
struct list_head zorder_list;
int order = 0, err;
DRM_DEBUG_ATOMIC("[CRTC:%d:%s] calculating normalized zpos values\n",
crtc->base.id, crtc->name);
INIT_LIST_HEAD(&zorder_list);
/* This loop also added all effected planes into the new state */
drm_for_each_plane_mask(plane, crtc->dev, crtc_st->plane_mask) {
plane_st = drm_atomic_get_plane_state(state, plane);
if (IS_ERR(plane_st))
return PTR_ERR(plane_st);
/* Build a list by zpos increasing */
err = komeda_plane_state_list_add(plane_st, &zorder_list);
if (err)
return err;
}
kcrtc_st->max_slave_zorder = 0;
list_for_each_entry(kplane_st, &zorder_list, zlist_node) {
plane_st = &kplane_st->base;
plane = plane_st->plane;
plane_st->normalized_zpos = order++;
/* When layer_split has been enabled, one plane will be handled
* by two separated komeda layers (left/right), which may needs
* two zorders.
* - zorder: for left_layer for left display part.
* - zorder + 1: will be reserved for right layer.
*/
if (to_kplane_st(plane_st)->layer_split)
order++;
DRM_DEBUG_ATOMIC("[PLANE:%d:%s] zpos:%d, normalized zpos: %d\n",
plane->base.id, plane->name,
plane_st->zpos, plane_st->normalized_zpos);
/* calculate max slave zorder */
if (has_bit(drm_plane_index(plane), kcrtc->slave_planes))
kcrtc_st->max_slave_zorder =
max(plane_st->normalized_zpos,
kcrtc_st->max_slave_zorder);
}
crtc_st->zpos_changed = true;
return 0;
}
static int komeda_kms_check(struct drm_device *dev,
struct drm_atomic_state *state)
{
struct drm_crtc *crtc;
struct drm_crtc_state *new_crtc_st;
int i, err;
err = drm_atomic_helper_check_modeset(dev, state);
if (err)
return err;
/* Komeda need to re-calculate resource assumption in every commit
* so need to add all affected_planes (even unchanged) to
* drm_atomic_state.
*/
for_each_new_crtc_in_state(state, crtc, new_crtc_st, i) {
err = drm_atomic_add_affected_planes(state, crtc);
if (err)
return err;
err = komeda_crtc_normalize_zpos(crtc, new_crtc_st);
if (err)
return err;
}
err = drm_atomic_helper_check_planes(dev, state);
if (err)
return err;
return 0;
}
static const struct drm_mode_config_funcs komeda_mode_config_funcs = {
.fb_create = komeda_fb_create,
.atomic_check = komeda_kms_check,
.atomic_commit = drm_atomic_helper_commit,
};
static void komeda_kms_mode_config_init(struct komeda_kms_dev *kms,
struct komeda_dev *mdev)
{
struct drm_mode_config *config = &kms->base.mode_config;
drm_mode_config_init(&kms->base);
komeda_kms_setup_crtcs(kms, mdev);
/* Get value from dev */
config->min_width = 0;
config->min_height = 0;
config->max_width = 4096;
config->max_height = 4096;
config->funcs = &komeda_mode_config_funcs;
config->helper_private = &komeda_mode_config_helpers;
}
struct komeda_kms_dev *komeda_kms_attach(struct komeda_dev *mdev)
{
struct komeda_kms_dev *kms;
struct drm_device *drm;
int err;
kms = devm_drm_dev_alloc(mdev->dev, &komeda_kms_driver,
struct komeda_kms_dev, base);
if (IS_ERR(kms))
return kms;
drm = &kms->base;
drm->dev_private = mdev;
komeda_kms_mode_config_init(kms, mdev);
err = komeda_kms_add_private_objs(kms, mdev);
if (err)
goto cleanup_mode_config;
err = komeda_kms_add_planes(kms, mdev);
if (err)
goto cleanup_mode_config;
err = drm_vblank_init(drm, kms->n_crtcs);
if (err)
goto cleanup_mode_config;
err = komeda_kms_add_crtcs(kms, mdev);
if (err)
goto cleanup_mode_config;
err = komeda_kms_add_wb_connectors(kms, mdev);
if (err)
goto cleanup_mode_config;
err = component_bind_all(mdev->dev, kms);
if (err)
goto cleanup_mode_config;
drm_mode_config_reset(drm);
err = devm_request_irq(drm->dev, mdev->irq,
komeda_kms_irq_handler, IRQF_SHARED,
drm->driver->name, drm);
if (err)
goto free_component_binding;
drm_kms_helper_poll_init(drm);
err = drm_dev_register(drm, 0);
if (err)
goto free_interrupts;
return kms;
free_interrupts:
drm_kms_helper_poll_fini(drm);
free_component_binding:
component_unbind_all(mdev->dev, drm);
cleanup_mode_config:
drm_mode_config_cleanup(drm);
komeda_kms_cleanup_private_objs(kms);
drm->dev_private = NULL;
return ERR_PTR(err);
}
void komeda_kms_detach(struct komeda_kms_dev *kms)
{
struct drm_device *drm = &kms->base;
struct komeda_dev *mdev = drm->dev_private;
drm_dev_unregister(drm);
drm_kms_helper_poll_fini(drm);
drm_atomic_helper_shutdown(drm);
component_unbind_all(mdev->dev, drm);
drm_mode_config_cleanup(drm);
komeda_kms_cleanup_private_objs(kms);
drm->dev_private = NULL;
}