Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
 */
 
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_bridge.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_of.h>
#include <drm/drm_panel.h>
#include <drm/drm_vblank.h>
 
#include "tidss_crtc.h"
#include "tidss_dispc.h"
#include "tidss_drv.h"
#include "tidss_encoder.h"
#include "tidss_kms.h"
#include "tidss_plane.h"
 
static void tidss_atomic_commit_tail(struct drm_atomic_state *old_state)
{
<------>struct drm_device *ddev = old_state->dev;
<------>struct tidss_device *tidss = to_tidss(ddev);
 
<------>dev_dbg(ddev->dev, "%s\n", __func__);
 
<------>tidss_runtime_get(tidss);
 
<------>drm_atomic_helper_commit_modeset_disables(ddev, old_state);
<------>drm_atomic_helper_commit_planes(ddev, old_state, 0);
<------>drm_atomic_helper_commit_modeset_enables(ddev, old_state);
 
<------>drm_atomic_helper_commit_hw_done(old_state);
<------>drm_atomic_helper_wait_for_flip_done(ddev, old_state);
 
<------>drm_atomic_helper_cleanup_planes(ddev, old_state);
 
<------>tidss_runtime_put(tidss);
}
 
static const struct drm_mode_config_helper_funcs mode_config_helper_funcs = {
<------>.atomic_commit_tail = tidss_atomic_commit_tail,
};
 
static int tidss_atomic_check(struct drm_device *ddev,
<------><------><------>      struct drm_atomic_state *state)
{
<------>struct drm_plane_state *opstate;
<------>struct drm_plane_state *npstate;
<------>struct drm_plane *plane;
<------>struct drm_crtc_state *cstate;
<------>struct drm_crtc *crtc;
<------>int ret, i;
 
<------>ret = drm_atomic_helper_check(ddev, state);
<------>if (ret)
<------><------>return ret;
 
<------>/*
<------> * Add all active planes on a CRTC to the atomic state, if
<------> * x/y/z position or activity of any plane on that CRTC
<------> * changes. This is needed for updating the plane positions in
<------> * tidss_crtc_position_planes() which is called from
<------> * crtc_atomic_enable() and crtc_atomic_flush(). We have an
<------> * extra flag to to mark x,y-position changes and together
<------> * with zpos_changed the condition recognizes all the above
<------> * cases.
<------> */
<------>for_each_oldnew_plane_in_state(state, plane, opstate, npstate, i) {
<------><------>if (!npstate->crtc || !npstate->visible)
<------><------><------>continue;
 
<------><------>if (!opstate->crtc || opstate->crtc_x != npstate->crtc_x ||
<------><------>    opstate->crtc_y != npstate->crtc_y) {
<------><------><------>cstate = drm_atomic_get_crtc_state(state,
<------><------><------><------><------><------><------>   npstate->crtc);
<------><------><------>if (IS_ERR(cstate))
<------><------><------><------>return PTR_ERR(cstate);
<------><------><------>to_tidss_crtc_state(cstate)->plane_pos_changed = true;
<------><------>}
<------>}
 
<------>for_each_new_crtc_in_state(state, crtc, cstate, i) {
<------><------>if (to_tidss_crtc_state(cstate)->plane_pos_changed ||
<------><------>    cstate->zpos_changed) {
<------><------><------>ret = drm_atomic_add_affected_planes(state, crtc);
<------><------><------>if (ret)
<------><------><------><------>return ret;
<------><------>}
<------>}
 
<------>return 0;
}
 
static const struct drm_mode_config_funcs mode_config_funcs = {
<------>.fb_create = drm_gem_fb_create,
<------>.atomic_check = tidss_atomic_check,
<------>.atomic_commit = drm_atomic_helper_commit,
};
 
static int tidss_dispc_modeset_init(struct tidss_device *tidss)
{
<------>struct device *dev = tidss->dev;
<------>unsigned int fourccs_len;
<------>const u32 *fourccs = dispc_plane_formats(tidss->dispc, &fourccs_len);
<------>unsigned int i;
 
<------>struct pipe {
<------><------>u32 hw_videoport;
<------><------>struct drm_bridge *bridge;
<------><------>u32 enc_type;
<------>};
 
<------>const struct dispc_features *feat = tidss->feat;
<------>u32 max_vps = feat->num_vps;
<------>u32 max_planes = feat->num_planes;
 
<------>struct pipe pipes[TIDSS_MAX_PORTS];
<------>u32 num_pipes = 0;
<------>u32 crtc_mask;
 
<------>/* first find all the connected panels & bridges */
 
<------>for (i = 0; i < max_vps; i++) {
<------><------>struct drm_panel *panel;
<------><------>struct drm_bridge *bridge;
<------><------>u32 enc_type = DRM_MODE_ENCODER_NONE;
<------><------>int ret;
 
<------><------>ret = drm_of_find_panel_or_bridge(dev->of_node, i, 0,
<------><------><------><------><------><------>  &panel, &bridge);
<------><------>if (ret == -ENODEV) {
<------><------><------>dev_dbg(dev, "no panel/bridge for port %d\n", i);
<------><------><------>continue;
<------><------>} else if (ret) {
<------><------><------>dev_dbg(dev, "port %d probe returned %d\n", i, ret);
<------><------><------>return ret;
<------><------>}
 
<------><------>if (panel) {
<------><------><------>u32 conn_type;
 
<------><------><------>dev_dbg(dev, "Setting up panel for port %d\n", i);
 
<------><------><------>switch (feat->vp_bus_type[i]) {
<------><------><------>case DISPC_VP_OLDI:
<------><------><------><------>enc_type = DRM_MODE_ENCODER_LVDS;
<------><------><------><------>conn_type = DRM_MODE_CONNECTOR_LVDS;
<------><------><------><------>break;
<------><------><------>case DISPC_VP_DPI:
<------><------><------><------>enc_type = DRM_MODE_ENCODER_DPI;
<------><------><------><------>conn_type = DRM_MODE_CONNECTOR_DPI;
<------><------><------><------>break;
<------><------><------>default:
<------><------><------><------>WARN_ON(1);
<------><------><------><------>return -EINVAL;
<------><------><------>}
 
<------><------><------>if (panel->connector_type != conn_type) {
<------><------><------><------>dev_err(dev,
<------><------><------><------><------>"%s: Panel %s has incompatible connector type for vp%d (%d != %d)\n",
<------><------><------><------><------> __func__, dev_name(panel->dev), i,
<------><------><------><------><------> panel->connector_type, conn_type);
<------><------><------><------>return -EINVAL;
<------><------><------>}
 
<------><------><------>bridge = devm_drm_panel_bridge_add(dev, panel);
<------><------><------>if (IS_ERR(bridge)) {
<------><------><------><------>dev_err(dev,
<------><------><------><------><------>"failed to set up panel bridge for port %d\n",
<------><------><------><------><------>i);
<------><------><------><------>return PTR_ERR(bridge);
<------><------><------>}
<------><------>}
 
<------><------>pipes[num_pipes].hw_videoport = i;
<------><------>pipes[num_pipes].bridge = bridge;
<------><------>pipes[num_pipes].enc_type = enc_type;
<------><------>num_pipes++;
<------>}
 
<------>/* all planes can be on any crtc */
<------>crtc_mask = (1 << num_pipes) - 1;
 
<------>/* then create a plane, a crtc and an encoder for each panel/bridge */
 
<------>for (i = 0; i < num_pipes; ++i) {
<------><------>struct tidss_plane *tplane;
<------><------>struct tidss_crtc *tcrtc;
<------><------>struct drm_encoder *enc;
<------><------>u32 hw_plane_id = feat->vid_order[tidss->num_planes];
<------><------>int ret;
 
<------><------>tplane = tidss_plane_create(tidss, hw_plane_id,
<------><------><------><------><------>    DRM_PLANE_TYPE_PRIMARY, crtc_mask,
<------><------><------><------><------>    fourccs, fourccs_len);
<------><------>if (IS_ERR(tplane)) {
<------><------><------>dev_err(tidss->dev, "plane create failed\n");
<------><------><------>return PTR_ERR(tplane);
<------><------>}
 
<------><------>tidss->planes[tidss->num_planes++] = &tplane->plane;
 
<------><------>tcrtc = tidss_crtc_create(tidss, pipes[i].hw_videoport,
<------><------><------><------><------>  &tplane->plane);
<------><------>if (IS_ERR(tcrtc)) {
<------><------><------>dev_err(tidss->dev, "crtc create failed\n");
<------><------><------>return PTR_ERR(tcrtc);
<------><------>}
 
<------><------>tidss->crtcs[tidss->num_crtcs++] = &tcrtc->crtc;
 
<------><------>enc = tidss_encoder_create(tidss, pipes[i].enc_type,
<------><------><------><------><------>   1 << tcrtc->crtc.index);
<------><------>if (IS_ERR(enc)) {
<------><------><------>dev_err(tidss->dev, "encoder create failed\n");
<------><------><------>return PTR_ERR(enc);
<------><------>}
 
<------><------>ret = drm_bridge_attach(enc, pipes[i].bridge, NULL, 0);
<------><------>if (ret) {
<------><------><------>dev_err(tidss->dev, "bridge attach failed: %d\n", ret);
<------><------><------>return ret;
<------><------>}
<------>}
 
<------>/* create overlay planes of the leftover planes */
 
<------>while (tidss->num_planes < max_planes) {
<------><------>struct tidss_plane *tplane;
<------><------>u32 hw_plane_id = feat->vid_order[tidss->num_planes];
 
<------><------>tplane = tidss_plane_create(tidss, hw_plane_id,
<------><------><------><------><------>    DRM_PLANE_TYPE_OVERLAY, crtc_mask,
<------><------><------><------><------>    fourccs, fourccs_len);
 
<------><------>if (IS_ERR(tplane)) {
<------><------><------>dev_err(tidss->dev, "plane create failed\n");
<------><------><------>return PTR_ERR(tplane);
<------><------>}
 
<------><------>tidss->planes[tidss->num_planes++] = &tplane->plane;
<------>}
 
<------>return 0;
}
 
int tidss_modeset_init(struct tidss_device *tidss)
{
<------>struct drm_device *ddev = &tidss->ddev;
<------>int ret;
 
<------>dev_dbg(tidss->dev, "%s\n", __func__);
 
<------>ret = drmm_mode_config_init(ddev);
<------>if (ret)
<------><------>return ret;
 
<------>ddev->mode_config.min_width = 8;
<------>ddev->mode_config.min_height = 8;
<------>ddev->mode_config.max_width = 8096;
<------>ddev->mode_config.max_height = 8096;
<------>ddev->mode_config.normalize_zpos = true;
<------>ddev->mode_config.funcs = &mode_config_funcs;
<------>ddev->mode_config.helper_private = &mode_config_helper_funcs;
 
<------>ret = tidss_dispc_modeset_init(tidss);
<------>if (ret)
<------><------>return ret;
 
<------>ret = drm_vblank_init(ddev, tidss->num_crtcs);
<------>if (ret)
<------><------>return ret;
 
<------>drm_mode_config_reset(ddev);
 
<------>dev_dbg(tidss->dev, "%s done\n", __func__);
 
<------>return 0;
}