127 lines
3.4 KiB
C
127 lines
3.4 KiB
C
/*
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* (C) COPYRIGHT 2012-2013 ARM Limited. All rights reserved.
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*
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* Parts of this file were based on sources as follows:
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*
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* Copyright (c) 2006-2008 Intel Corporation
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* Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
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* Copyright (C) 2011 Texas Instruments
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*
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* This program is free software and is provided to you under the terms of the
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* GNU General Public License version 2 as published by the Free Software
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* Foundation, and any use by you of this program is subject to the terms of
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* such GNU licence.
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*
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*/
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/**
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* pl111_drm_connector.c
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* Implementation of the connector functions for PL111 DRM
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*/
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#include <linux/amba/clcd-regs.h>
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#include <linux/version.h>
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#include <linux/shmem_fs.h>
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#include <linux/dma-buf.h>
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#include <drm/drmP.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_of.h>
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#include <drm/drm_panel.h>
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#include "pl111_drm.h"
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static void pl111_connector_destroy(struct drm_connector *connector)
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{
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struct pl111_drm_connector *pl111_connector =
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to_pl111_connector(connector);
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if (pl111_connector->panel)
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drm_panel_detach(pl111_connector->panel);
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drm_connector_unregister(connector);
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drm_connector_cleanup(connector);
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}
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static enum drm_connector_status pl111_connector_detect(struct drm_connector
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*connector, bool force)
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{
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struct pl111_drm_connector *pl111_connector =
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to_pl111_connector(connector);
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return (pl111_connector->panel ?
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connector_status_connected :
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connector_status_disconnected);
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}
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static int pl111_connector_helper_get_modes(struct drm_connector *connector)
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{
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struct pl111_drm_connector *pl111_connector =
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to_pl111_connector(connector);
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if (!pl111_connector->panel)
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return 0;
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return drm_panel_get_modes(pl111_connector->panel);
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}
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const struct drm_connector_funcs connector_funcs = {
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.fill_modes = drm_helper_probe_single_connector_modes,
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.destroy = pl111_connector_destroy,
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.detect = pl111_connector_detect,
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.reset = drm_atomic_helper_connector_reset,
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.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
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};
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const struct drm_connector_helper_funcs connector_helper_funcs = {
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.get_modes = pl111_connector_helper_get_modes,
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};
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/* Walks the OF graph to find the panel node and then asks DRM to look
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* up the panel.
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*/
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static struct drm_panel *pl111_get_panel(struct device *dev)
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{
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struct device_node *endpoint, *panel_node;
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struct device_node *np = dev->of_node;
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struct drm_panel *panel;
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endpoint = of_graph_get_next_endpoint(np, NULL);
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if (!endpoint) {
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dev_err(dev, "no endpoint to fetch panel\n");
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return NULL;
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}
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/* don't proceed if we have an endpoint but no panel_node tied to it */
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panel_node = of_graph_get_remote_port_parent(endpoint);
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of_node_put(endpoint);
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if (!panel_node) {
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dev_err(dev, "no valid panel node\n");
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return NULL;
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}
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panel = of_drm_find_panel(panel_node);
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of_node_put(panel_node);
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return panel;
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}
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int pl111_connector_init(struct drm_device *dev)
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{
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struct pl111_drm_dev_private *priv = dev->dev_private;
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struct pl111_drm_connector *pl111_connector = &priv->connector;
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struct drm_connector *connector = &pl111_connector->connector;
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drm_connector_init(dev, connector, &connector_funcs,
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DRM_MODE_CONNECTOR_DPI);
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drm_connector_helper_add(connector, &connector_helper_funcs);
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pl111_connector->panel = pl111_get_panel(dev->dev);
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if (pl111_connector->panel)
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drm_panel_attach(pl111_connector->panel, connector);
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return 0;
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}
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