23f965a4c6
Display Serial Interface (DSI) host can usefully be modelled as their own uclass. DSI defines a serial bus and a communication protocol between the host and the device (panel, bridge). Signed-off-by: Yannick Fertré <yannick.fertre@st.com>
91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
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/*
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* Copyright (C) 2019, STMicroelectronics - All Rights Reserved
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*/
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#include <common.h>
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#include <display.h>
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#include <dm.h>
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#include <dsi_host.h>
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/**
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* struct sandbox_dsi_host_priv - private data for driver
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* @device: DSI peripheral device
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* @timing: Display timings
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* @max_data_lanes: maximum number of data lines
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* @phy_ops: set of function pointers for performing physical operations
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*/
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struct sandbox_dsi_host_priv {
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struct mipi_dsi_device *device;
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struct display_timing *timings;
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unsigned int max_data_lanes;
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const struct mipi_dsi_phy_ops *phy_ops;
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};
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static int sandbox_dsi_host_init(struct udevice *dev,
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struct mipi_dsi_device *device,
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struct display_timing *timings,
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unsigned int max_data_lanes,
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const struct mipi_dsi_phy_ops *phy_ops)
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{
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struct sandbox_dsi_host_priv *priv = dev_get_priv(dev);
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if (!device)
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return -1;
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if (!timings)
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return -2;
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if (max_data_lanes == 0)
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return -3;
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if (!phy_ops)
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return -4;
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if (!phy_ops->init || !phy_ops->get_lane_mbps ||
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!phy_ops->post_set_mode)
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return -5;
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priv->max_data_lanes = max_data_lanes;
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priv->phy_ops = phy_ops;
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priv->timings = timings;
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priv->device = device;
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return 0;
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}
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static int sandbox_dsi_host_enable(struct udevice *dev)
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{
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struct sandbox_dsi_host_priv *priv = dev_get_priv(dev);
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unsigned int lane_mbps;
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int ret;
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priv->phy_ops->init(priv->device);
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ret = priv->phy_ops->get_lane_mbps(priv->device, priv->timings, 2,
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MIPI_DSI_FMT_RGB888, &lane_mbps);
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if (ret)
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return -1;
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priv->phy_ops->post_set_mode(priv->device, MIPI_DSI_MODE_VIDEO);
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return 0;
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}
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struct dsi_host_ops sandbox_dsi_host_ops = {
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.init = sandbox_dsi_host_init,
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.enable = sandbox_dsi_host_enable,
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};
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static const struct udevice_id sandbox_dsi_host_ids[] = {
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{ .compatible = "sandbox,dsi-host"},
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{ }
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};
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U_BOOT_DRIVER(sandbox_dsi_host) = {
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.name = "sandbox-dsi-host",
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.id = UCLASS_DSI_HOST,
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.of_match = sandbox_dsi_host_ids,
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.ops = &sandbox_dsi_host_ops,
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.priv_auto_alloc_size = sizeof(struct sandbox_dsi_host_priv),
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};
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