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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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![Thierry Reding](/assets/img/avatar_default.png)
In order to restore DPMS with atomic mode-setting, move all code from the ->mode_set() callback into ->enable(). At the same time, rename the ->prepare() callback to ->disable() to use the names preferred by atomic mode-setting. This simplifies the calling sequence and will allow DPMS to use runtime PM in subsequent patches. Signed-off-by: Thierry Reding <treding@nvidia.com>
1640 lines
40 KiB
C
1640 lines
40 KiB
C
/*
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* Copyright (C) 2013 NVIDIA Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/clk.h>
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#include <linux/debugfs.h>
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#include <linux/host1x.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/reset.h>
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#include <linux/regulator/consumer.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_mipi_dsi.h>
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#include <drm/drm_panel.h>
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#include <video/mipi_display.h>
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#include "dc.h"
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#include "drm.h"
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#include "dsi.h"
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#include "mipi-phy.h"
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struct tegra_dsi_state {
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struct drm_connector_state base;
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struct mipi_dphy_timing timing;
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unsigned long period;
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unsigned int vrefresh;
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unsigned int lanes;
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unsigned long pclk;
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unsigned long bclk;
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enum tegra_dsi_format format;
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unsigned int mul;
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unsigned int div;
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};
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static inline struct tegra_dsi_state *
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to_dsi_state(struct drm_connector_state *state)
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{
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return container_of(state, struct tegra_dsi_state, base);
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}
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struct tegra_dsi {
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struct host1x_client client;
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struct tegra_output output;
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struct device *dev;
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void __iomem *regs;
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struct reset_control *rst;
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struct clk *clk_parent;
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struct clk *clk_lp;
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struct clk *clk;
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struct drm_info_list *debugfs_files;
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struct drm_minor *minor;
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struct dentry *debugfs;
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unsigned long flags;
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enum mipi_dsi_pixel_format format;
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unsigned int lanes;
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struct tegra_mipi_device *mipi;
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struct mipi_dsi_host host;
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struct regulator *vdd;
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unsigned int video_fifo_depth;
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unsigned int host_fifo_depth;
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/* for ganged-mode support */
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struct tegra_dsi *master;
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struct tegra_dsi *slave;
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};
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static inline struct tegra_dsi *
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host1x_client_to_dsi(struct host1x_client *client)
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{
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return container_of(client, struct tegra_dsi, client);
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}
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static inline struct tegra_dsi *host_to_tegra(struct mipi_dsi_host *host)
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{
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return container_of(host, struct tegra_dsi, host);
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}
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static inline struct tegra_dsi *to_dsi(struct tegra_output *output)
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{
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return container_of(output, struct tegra_dsi, output);
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}
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static struct tegra_dsi_state *tegra_dsi_get_state(struct tegra_dsi *dsi)
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{
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return to_dsi_state(dsi->output.connector.state);
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}
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static inline u32 tegra_dsi_readl(struct tegra_dsi *dsi, unsigned long reg)
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{
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return readl(dsi->regs + (reg << 2));
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}
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static inline void tegra_dsi_writel(struct tegra_dsi *dsi, u32 value,
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unsigned long reg)
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{
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writel(value, dsi->regs + (reg << 2));
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}
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static int tegra_dsi_show_regs(struct seq_file *s, void *data)
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{
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struct drm_info_node *node = s->private;
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struct tegra_dsi *dsi = node->info_ent->data;
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struct drm_crtc *crtc = dsi->output.encoder.crtc;
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struct drm_device *drm = node->minor->dev;
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int err = 0;
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drm_modeset_lock_all(drm);
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if (!crtc || !crtc->state->active) {
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err = -EBUSY;
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goto unlock;
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}
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#define DUMP_REG(name) \
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seq_printf(s, "%-32s %#05x %08x\n", #name, name, \
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tegra_dsi_readl(dsi, name))
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DUMP_REG(DSI_INCR_SYNCPT);
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DUMP_REG(DSI_INCR_SYNCPT_CONTROL);
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DUMP_REG(DSI_INCR_SYNCPT_ERROR);
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DUMP_REG(DSI_CTXSW);
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DUMP_REG(DSI_RD_DATA);
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DUMP_REG(DSI_WR_DATA);
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DUMP_REG(DSI_POWER_CONTROL);
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DUMP_REG(DSI_INT_ENABLE);
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DUMP_REG(DSI_INT_STATUS);
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DUMP_REG(DSI_INT_MASK);
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DUMP_REG(DSI_HOST_CONTROL);
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DUMP_REG(DSI_CONTROL);
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DUMP_REG(DSI_SOL_DELAY);
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DUMP_REG(DSI_MAX_THRESHOLD);
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DUMP_REG(DSI_TRIGGER);
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DUMP_REG(DSI_TX_CRC);
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DUMP_REG(DSI_STATUS);
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DUMP_REG(DSI_INIT_SEQ_CONTROL);
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DUMP_REG(DSI_INIT_SEQ_DATA_0);
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DUMP_REG(DSI_INIT_SEQ_DATA_1);
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DUMP_REG(DSI_INIT_SEQ_DATA_2);
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DUMP_REG(DSI_INIT_SEQ_DATA_3);
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DUMP_REG(DSI_INIT_SEQ_DATA_4);
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DUMP_REG(DSI_INIT_SEQ_DATA_5);
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DUMP_REG(DSI_INIT_SEQ_DATA_6);
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DUMP_REG(DSI_INIT_SEQ_DATA_7);
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DUMP_REG(DSI_PKT_SEQ_0_LO);
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DUMP_REG(DSI_PKT_SEQ_0_HI);
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DUMP_REG(DSI_PKT_SEQ_1_LO);
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DUMP_REG(DSI_PKT_SEQ_1_HI);
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DUMP_REG(DSI_PKT_SEQ_2_LO);
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DUMP_REG(DSI_PKT_SEQ_2_HI);
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DUMP_REG(DSI_PKT_SEQ_3_LO);
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DUMP_REG(DSI_PKT_SEQ_3_HI);
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DUMP_REG(DSI_PKT_SEQ_4_LO);
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DUMP_REG(DSI_PKT_SEQ_4_HI);
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DUMP_REG(DSI_PKT_SEQ_5_LO);
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DUMP_REG(DSI_PKT_SEQ_5_HI);
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DUMP_REG(DSI_DCS_CMDS);
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DUMP_REG(DSI_PKT_LEN_0_1);
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DUMP_REG(DSI_PKT_LEN_2_3);
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DUMP_REG(DSI_PKT_LEN_4_5);
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DUMP_REG(DSI_PKT_LEN_6_7);
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DUMP_REG(DSI_PHY_TIMING_0);
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DUMP_REG(DSI_PHY_TIMING_1);
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DUMP_REG(DSI_PHY_TIMING_2);
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DUMP_REG(DSI_BTA_TIMING);
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DUMP_REG(DSI_TIMEOUT_0);
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DUMP_REG(DSI_TIMEOUT_1);
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DUMP_REG(DSI_TO_TALLY);
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DUMP_REG(DSI_PAD_CONTROL_0);
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DUMP_REG(DSI_PAD_CONTROL_CD);
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DUMP_REG(DSI_PAD_CD_STATUS);
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DUMP_REG(DSI_VIDEO_MODE_CONTROL);
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DUMP_REG(DSI_PAD_CONTROL_1);
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DUMP_REG(DSI_PAD_CONTROL_2);
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DUMP_REG(DSI_PAD_CONTROL_3);
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DUMP_REG(DSI_PAD_CONTROL_4);
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DUMP_REG(DSI_GANGED_MODE_CONTROL);
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DUMP_REG(DSI_GANGED_MODE_START);
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DUMP_REG(DSI_GANGED_MODE_SIZE);
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DUMP_REG(DSI_RAW_DATA_BYTE_COUNT);
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DUMP_REG(DSI_ULTRA_LOW_POWER_CONTROL);
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DUMP_REG(DSI_INIT_SEQ_DATA_8);
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DUMP_REG(DSI_INIT_SEQ_DATA_9);
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DUMP_REG(DSI_INIT_SEQ_DATA_10);
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DUMP_REG(DSI_INIT_SEQ_DATA_11);
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DUMP_REG(DSI_INIT_SEQ_DATA_12);
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DUMP_REG(DSI_INIT_SEQ_DATA_13);
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DUMP_REG(DSI_INIT_SEQ_DATA_14);
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DUMP_REG(DSI_INIT_SEQ_DATA_15);
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#undef DUMP_REG
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unlock:
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drm_modeset_unlock_all(drm);
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return err;
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}
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static struct drm_info_list debugfs_files[] = {
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{ "regs", tegra_dsi_show_regs, 0, NULL },
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};
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static int tegra_dsi_debugfs_init(struct tegra_dsi *dsi,
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struct drm_minor *minor)
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{
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const char *name = dev_name(dsi->dev);
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unsigned int i;
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int err;
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dsi->debugfs = debugfs_create_dir(name, minor->debugfs_root);
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if (!dsi->debugfs)
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return -ENOMEM;
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dsi->debugfs_files = kmemdup(debugfs_files, sizeof(debugfs_files),
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GFP_KERNEL);
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if (!dsi->debugfs_files) {
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err = -ENOMEM;
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goto remove;
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}
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for (i = 0; i < ARRAY_SIZE(debugfs_files); i++)
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dsi->debugfs_files[i].data = dsi;
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err = drm_debugfs_create_files(dsi->debugfs_files,
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ARRAY_SIZE(debugfs_files),
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dsi->debugfs, minor);
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if (err < 0)
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goto free;
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dsi->minor = minor;
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return 0;
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free:
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kfree(dsi->debugfs_files);
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dsi->debugfs_files = NULL;
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remove:
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debugfs_remove(dsi->debugfs);
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dsi->debugfs = NULL;
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return err;
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}
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static void tegra_dsi_debugfs_exit(struct tegra_dsi *dsi)
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{
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drm_debugfs_remove_files(dsi->debugfs_files, ARRAY_SIZE(debugfs_files),
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dsi->minor);
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dsi->minor = NULL;
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kfree(dsi->debugfs_files);
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dsi->debugfs_files = NULL;
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debugfs_remove(dsi->debugfs);
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dsi->debugfs = NULL;
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}
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#define PKT_ID0(id) ((((id) & 0x3f) << 3) | (1 << 9))
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#define PKT_LEN0(len) (((len) & 0x07) << 0)
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#define PKT_ID1(id) ((((id) & 0x3f) << 13) | (1 << 19))
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#define PKT_LEN1(len) (((len) & 0x07) << 10)
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#define PKT_ID2(id) ((((id) & 0x3f) << 23) | (1 << 29))
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#define PKT_LEN2(len) (((len) & 0x07) << 20)
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#define PKT_LP (1 << 30)
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#define NUM_PKT_SEQ 12
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/*
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* non-burst mode with sync pulses
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*/
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static const u32 pkt_seq_video_non_burst_sync_pulses[NUM_PKT_SEQ] = {
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[ 0] = PKT_ID0(MIPI_DSI_V_SYNC_START) | PKT_LEN0(0) |
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PKT_ID1(MIPI_DSI_BLANKING_PACKET) | PKT_LEN1(1) |
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PKT_ID2(MIPI_DSI_H_SYNC_END) | PKT_LEN2(0) |
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PKT_LP,
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[ 1] = 0,
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[ 2] = PKT_ID0(MIPI_DSI_V_SYNC_END) | PKT_LEN0(0) |
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PKT_ID1(MIPI_DSI_BLANKING_PACKET) | PKT_LEN1(1) |
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PKT_ID2(MIPI_DSI_H_SYNC_END) | PKT_LEN2(0) |
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PKT_LP,
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[ 3] = 0,
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[ 4] = PKT_ID0(MIPI_DSI_H_SYNC_START) | PKT_LEN0(0) |
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PKT_ID1(MIPI_DSI_BLANKING_PACKET) | PKT_LEN1(1) |
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PKT_ID2(MIPI_DSI_H_SYNC_END) | PKT_LEN2(0) |
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PKT_LP,
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[ 5] = 0,
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[ 6] = PKT_ID0(MIPI_DSI_H_SYNC_START) | PKT_LEN0(0) |
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PKT_ID1(MIPI_DSI_BLANKING_PACKET) | PKT_LEN1(1) |
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PKT_ID2(MIPI_DSI_H_SYNC_END) | PKT_LEN2(0),
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[ 7] = PKT_ID0(MIPI_DSI_BLANKING_PACKET) | PKT_LEN0(2) |
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PKT_ID1(MIPI_DSI_PACKED_PIXEL_STREAM_24) | PKT_LEN1(3) |
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PKT_ID2(MIPI_DSI_BLANKING_PACKET) | PKT_LEN2(4),
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[ 8] = PKT_ID0(MIPI_DSI_H_SYNC_START) | PKT_LEN0(0) |
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PKT_ID1(MIPI_DSI_BLANKING_PACKET) | PKT_LEN1(1) |
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PKT_ID2(MIPI_DSI_H_SYNC_END) | PKT_LEN2(0) |
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PKT_LP,
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[ 9] = 0,
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[10] = PKT_ID0(MIPI_DSI_H_SYNC_START) | PKT_LEN0(0) |
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PKT_ID1(MIPI_DSI_BLANKING_PACKET) | PKT_LEN1(1) |
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PKT_ID2(MIPI_DSI_H_SYNC_END) | PKT_LEN2(0),
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[11] = PKT_ID0(MIPI_DSI_BLANKING_PACKET) | PKT_LEN0(2) |
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PKT_ID1(MIPI_DSI_PACKED_PIXEL_STREAM_24) | PKT_LEN1(3) |
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PKT_ID2(MIPI_DSI_BLANKING_PACKET) | PKT_LEN2(4),
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};
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/*
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* non-burst mode with sync events
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*/
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static const u32 pkt_seq_video_non_burst_sync_events[NUM_PKT_SEQ] = {
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[ 0] = PKT_ID0(MIPI_DSI_V_SYNC_START) | PKT_LEN0(0) |
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PKT_ID1(MIPI_DSI_END_OF_TRANSMISSION) | PKT_LEN1(7) |
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PKT_LP,
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[ 1] = 0,
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[ 2] = PKT_ID0(MIPI_DSI_H_SYNC_START) | PKT_LEN0(0) |
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PKT_ID1(MIPI_DSI_END_OF_TRANSMISSION) | PKT_LEN1(7) |
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PKT_LP,
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[ 3] = 0,
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[ 4] = PKT_ID0(MIPI_DSI_H_SYNC_START) | PKT_LEN0(0) |
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PKT_ID1(MIPI_DSI_END_OF_TRANSMISSION) | PKT_LEN1(7) |
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PKT_LP,
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[ 5] = 0,
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[ 6] = PKT_ID0(MIPI_DSI_H_SYNC_START) | PKT_LEN0(0) |
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PKT_ID1(MIPI_DSI_BLANKING_PACKET) | PKT_LEN1(2) |
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PKT_ID2(MIPI_DSI_PACKED_PIXEL_STREAM_24) | PKT_LEN2(3),
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[ 7] = PKT_ID0(MIPI_DSI_BLANKING_PACKET) | PKT_LEN0(4),
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[ 8] = PKT_ID0(MIPI_DSI_H_SYNC_START) | PKT_LEN0(0) |
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PKT_ID1(MIPI_DSI_END_OF_TRANSMISSION) | PKT_LEN1(7) |
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PKT_LP,
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[ 9] = 0,
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[10] = PKT_ID0(MIPI_DSI_H_SYNC_START) | PKT_LEN0(0) |
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PKT_ID1(MIPI_DSI_BLANKING_PACKET) | PKT_LEN1(2) |
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PKT_ID2(MIPI_DSI_PACKED_PIXEL_STREAM_24) | PKT_LEN2(3),
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[11] = PKT_ID0(MIPI_DSI_BLANKING_PACKET) | PKT_LEN0(4),
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};
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static const u32 pkt_seq_command_mode[NUM_PKT_SEQ] = {
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[ 0] = 0,
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[ 1] = 0,
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[ 2] = 0,
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[ 3] = 0,
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[ 4] = 0,
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[ 5] = 0,
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[ 6] = PKT_ID0(MIPI_DSI_DCS_LONG_WRITE) | PKT_LEN0(3) | PKT_LP,
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[ 7] = 0,
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[ 8] = 0,
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[ 9] = 0,
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[10] = PKT_ID0(MIPI_DSI_DCS_LONG_WRITE) | PKT_LEN0(5) | PKT_LP,
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[11] = 0,
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};
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|
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static void tegra_dsi_set_phy_timing(struct tegra_dsi *dsi,
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unsigned long period,
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const struct mipi_dphy_timing *timing)
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{
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u32 value;
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value = DSI_TIMING_FIELD(timing->hsexit, period, 1) << 24 |
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DSI_TIMING_FIELD(timing->hstrail, period, 0) << 16 |
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DSI_TIMING_FIELD(timing->hszero, period, 3) << 8 |
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DSI_TIMING_FIELD(timing->hsprepare, period, 1);
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tegra_dsi_writel(dsi, value, DSI_PHY_TIMING_0);
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value = DSI_TIMING_FIELD(timing->clktrail, period, 1) << 24 |
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DSI_TIMING_FIELD(timing->clkpost, period, 1) << 16 |
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DSI_TIMING_FIELD(timing->clkzero, period, 1) << 8 |
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DSI_TIMING_FIELD(timing->lpx, period, 1);
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tegra_dsi_writel(dsi, value, DSI_PHY_TIMING_1);
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value = DSI_TIMING_FIELD(timing->clkprepare, period, 1) << 16 |
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DSI_TIMING_FIELD(timing->clkpre, period, 1) << 8 |
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DSI_TIMING_FIELD(0xff * period, period, 0) << 0;
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tegra_dsi_writel(dsi, value, DSI_PHY_TIMING_2);
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value = DSI_TIMING_FIELD(timing->taget, period, 1) << 16 |
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DSI_TIMING_FIELD(timing->tasure, period, 1) << 8 |
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DSI_TIMING_FIELD(timing->tago, period, 1);
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tegra_dsi_writel(dsi, value, DSI_BTA_TIMING);
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if (dsi->slave)
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tegra_dsi_set_phy_timing(dsi->slave, period, timing);
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}
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|
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static int tegra_dsi_get_muldiv(enum mipi_dsi_pixel_format format,
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unsigned int *mulp, unsigned int *divp)
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{
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switch (format) {
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case MIPI_DSI_FMT_RGB666_PACKED:
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case MIPI_DSI_FMT_RGB888:
|
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*mulp = 3;
|
|
*divp = 1;
|
|
break;
|
|
|
|
case MIPI_DSI_FMT_RGB565:
|
|
*mulp = 2;
|
|
*divp = 1;
|
|
break;
|
|
|
|
case MIPI_DSI_FMT_RGB666:
|
|
*mulp = 9;
|
|
*divp = 4;
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_dsi_get_format(enum mipi_dsi_pixel_format format,
|
|
enum tegra_dsi_format *fmt)
|
|
{
|
|
switch (format) {
|
|
case MIPI_DSI_FMT_RGB888:
|
|
*fmt = TEGRA_DSI_FORMAT_24P;
|
|
break;
|
|
|
|
case MIPI_DSI_FMT_RGB666:
|
|
*fmt = TEGRA_DSI_FORMAT_18NP;
|
|
break;
|
|
|
|
case MIPI_DSI_FMT_RGB666_PACKED:
|
|
*fmt = TEGRA_DSI_FORMAT_18P;
|
|
break;
|
|
|
|
case MIPI_DSI_FMT_RGB565:
|
|
*fmt = TEGRA_DSI_FORMAT_16P;
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void tegra_dsi_ganged_enable(struct tegra_dsi *dsi, unsigned int start,
|
|
unsigned int size)
|
|
{
|
|
u32 value;
|
|
|
|
tegra_dsi_writel(dsi, start, DSI_GANGED_MODE_START);
|
|
tegra_dsi_writel(dsi, size << 16 | size, DSI_GANGED_MODE_SIZE);
|
|
|
|
value = DSI_GANGED_MODE_CONTROL_ENABLE;
|
|
tegra_dsi_writel(dsi, value, DSI_GANGED_MODE_CONTROL);
|
|
}
|
|
|
|
static void tegra_dsi_enable(struct tegra_dsi *dsi)
|
|
{
|
|
u32 value;
|
|
|
|
value = tegra_dsi_readl(dsi, DSI_POWER_CONTROL);
|
|
value |= DSI_POWER_CONTROL_ENABLE;
|
|
tegra_dsi_writel(dsi, value, DSI_POWER_CONTROL);
|
|
|
|
if (dsi->slave)
|
|
tegra_dsi_enable(dsi->slave);
|
|
}
|
|
|
|
static unsigned int tegra_dsi_get_lanes(struct tegra_dsi *dsi)
|
|
{
|
|
if (dsi->master)
|
|
return dsi->master->lanes + dsi->lanes;
|
|
|
|
if (dsi->slave)
|
|
return dsi->lanes + dsi->slave->lanes;
|
|
|
|
return dsi->lanes;
|
|
}
|
|
|
|
static void tegra_dsi_configure(struct tegra_dsi *dsi, unsigned int pipe,
|
|
const struct drm_display_mode *mode)
|
|
{
|
|
unsigned int hact, hsw, hbp, hfp, i, mul, div;
|
|
struct tegra_dsi_state *state;
|
|
const u32 *pkt_seq;
|
|
u32 value;
|
|
|
|
/* XXX: pass in state into this function? */
|
|
if (dsi->master)
|
|
state = tegra_dsi_get_state(dsi->master);
|
|
else
|
|
state = tegra_dsi_get_state(dsi);
|
|
|
|
mul = state->mul;
|
|
div = state->div;
|
|
|
|
if (dsi->flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) {
|
|
DRM_DEBUG_KMS("Non-burst video mode with sync pulses\n");
|
|
pkt_seq = pkt_seq_video_non_burst_sync_pulses;
|
|
} else if (dsi->flags & MIPI_DSI_MODE_VIDEO) {
|
|
DRM_DEBUG_KMS("Non-burst video mode with sync events\n");
|
|
pkt_seq = pkt_seq_video_non_burst_sync_events;
|
|
} else {
|
|
DRM_DEBUG_KMS("Command mode\n");
|
|
pkt_seq = pkt_seq_command_mode;
|
|
}
|
|
|
|
value = DSI_CONTROL_CHANNEL(0) |
|
|
DSI_CONTROL_FORMAT(state->format) |
|
|
DSI_CONTROL_LANES(dsi->lanes - 1) |
|
|
DSI_CONTROL_SOURCE(pipe);
|
|
tegra_dsi_writel(dsi, value, DSI_CONTROL);
|
|
|
|
tegra_dsi_writel(dsi, dsi->video_fifo_depth, DSI_MAX_THRESHOLD);
|
|
|
|
value = DSI_HOST_CONTROL_HS;
|
|
tegra_dsi_writel(dsi, value, DSI_HOST_CONTROL);
|
|
|
|
value = tegra_dsi_readl(dsi, DSI_CONTROL);
|
|
|
|
if (dsi->flags & MIPI_DSI_CLOCK_NON_CONTINUOUS)
|
|
value |= DSI_CONTROL_HS_CLK_CTRL;
|
|
|
|
value &= ~DSI_CONTROL_TX_TRIG(3);
|
|
|
|
/* enable DCS commands for command mode */
|
|
if (dsi->flags & MIPI_DSI_MODE_VIDEO)
|
|
value &= ~DSI_CONTROL_DCS_ENABLE;
|
|
else
|
|
value |= DSI_CONTROL_DCS_ENABLE;
|
|
|
|
value |= DSI_CONTROL_VIDEO_ENABLE;
|
|
value &= ~DSI_CONTROL_HOST_ENABLE;
|
|
tegra_dsi_writel(dsi, value, DSI_CONTROL);
|
|
|
|
for (i = 0; i < NUM_PKT_SEQ; i++)
|
|
tegra_dsi_writel(dsi, pkt_seq[i], DSI_PKT_SEQ_0_LO + i);
|
|
|
|
if (dsi->flags & MIPI_DSI_MODE_VIDEO) {
|
|
/* horizontal active pixels */
|
|
hact = mode->hdisplay * mul / div;
|
|
|
|
/* horizontal sync width */
|
|
hsw = (mode->hsync_end - mode->hsync_start) * mul / div;
|
|
|
|
/* horizontal back porch */
|
|
hbp = (mode->htotal - mode->hsync_end) * mul / div;
|
|
|
|
if ((dsi->flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) == 0)
|
|
hbp += hsw;
|
|
|
|
/* horizontal front porch */
|
|
hfp = (mode->hsync_start - mode->hdisplay) * mul / div;
|
|
|
|
/* subtract packet overhead */
|
|
hsw -= 10;
|
|
hbp -= 14;
|
|
hfp -= 8;
|
|
|
|
tegra_dsi_writel(dsi, hsw << 16 | 0, DSI_PKT_LEN_0_1);
|
|
tegra_dsi_writel(dsi, hact << 16 | hbp, DSI_PKT_LEN_2_3);
|
|
tegra_dsi_writel(dsi, hfp, DSI_PKT_LEN_4_5);
|
|
tegra_dsi_writel(dsi, 0x0f0f << 16, DSI_PKT_LEN_6_7);
|
|
|
|
/* set SOL delay (for non-burst mode only) */
|
|
tegra_dsi_writel(dsi, 8 * mul / div, DSI_SOL_DELAY);
|
|
|
|
/* TODO: implement ganged mode */
|
|
} else {
|
|
u16 bytes;
|
|
|
|
if (dsi->master || dsi->slave) {
|
|
/*
|
|
* For ganged mode, assume symmetric left-right mode.
|
|
*/
|
|
bytes = 1 + (mode->hdisplay / 2) * mul / div;
|
|
} else {
|
|
/* 1 byte (DCS command) + pixel data */
|
|
bytes = 1 + mode->hdisplay * mul / div;
|
|
}
|
|
|
|
tegra_dsi_writel(dsi, 0, DSI_PKT_LEN_0_1);
|
|
tegra_dsi_writel(dsi, bytes << 16, DSI_PKT_LEN_2_3);
|
|
tegra_dsi_writel(dsi, bytes << 16, DSI_PKT_LEN_4_5);
|
|
tegra_dsi_writel(dsi, 0, DSI_PKT_LEN_6_7);
|
|
|
|
value = MIPI_DCS_WRITE_MEMORY_START << 8 |
|
|
MIPI_DCS_WRITE_MEMORY_CONTINUE;
|
|
tegra_dsi_writel(dsi, value, DSI_DCS_CMDS);
|
|
|
|
/* set SOL delay */
|
|
if (dsi->master || dsi->slave) {
|
|
unsigned long delay, bclk, bclk_ganged;
|
|
unsigned int lanes = state->lanes;
|
|
|
|
/* SOL to valid, valid to FIFO and FIFO write delay */
|
|
delay = 4 + 4 + 2;
|
|
delay = DIV_ROUND_UP(delay * mul, div * lanes);
|
|
/* FIFO read delay */
|
|
delay = delay + 6;
|
|
|
|
bclk = DIV_ROUND_UP(mode->htotal * mul, div * lanes);
|
|
bclk_ganged = DIV_ROUND_UP(bclk * lanes / 2, lanes);
|
|
value = bclk - bclk_ganged + delay + 20;
|
|
} else {
|
|
/* TODO: revisit for non-ganged mode */
|
|
value = 8 * mul / div;
|
|
}
|
|
|
|
tegra_dsi_writel(dsi, value, DSI_SOL_DELAY);
|
|
}
|
|
|
|
if (dsi->slave) {
|
|
tegra_dsi_configure(dsi->slave, pipe, mode);
|
|
|
|
/*
|
|
* TODO: Support modes other than symmetrical left-right
|
|
* split.
|
|
*/
|
|
tegra_dsi_ganged_enable(dsi, 0, mode->hdisplay / 2);
|
|
tegra_dsi_ganged_enable(dsi->slave, mode->hdisplay / 2,
|
|
mode->hdisplay / 2);
|
|
}
|
|
}
|
|
|
|
static int tegra_dsi_wait_idle(struct tegra_dsi *dsi, unsigned long timeout)
|
|
{
|
|
u32 value;
|
|
|
|
timeout = jiffies + msecs_to_jiffies(timeout);
|
|
|
|
while (time_before(jiffies, timeout)) {
|
|
value = tegra_dsi_readl(dsi, DSI_STATUS);
|
|
if (value & DSI_STATUS_IDLE)
|
|
return 0;
|
|
|
|
usleep_range(1000, 2000);
|
|
}
|
|
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
static void tegra_dsi_video_disable(struct tegra_dsi *dsi)
|
|
{
|
|
u32 value;
|
|
|
|
value = tegra_dsi_readl(dsi, DSI_CONTROL);
|
|
value &= ~DSI_CONTROL_VIDEO_ENABLE;
|
|
tegra_dsi_writel(dsi, value, DSI_CONTROL);
|
|
|
|
if (dsi->slave)
|
|
tegra_dsi_video_disable(dsi->slave);
|
|
}
|
|
|
|
static void tegra_dsi_ganged_disable(struct tegra_dsi *dsi)
|
|
{
|
|
tegra_dsi_writel(dsi, 0, DSI_GANGED_MODE_START);
|
|
tegra_dsi_writel(dsi, 0, DSI_GANGED_MODE_SIZE);
|
|
tegra_dsi_writel(dsi, 0, DSI_GANGED_MODE_CONTROL);
|
|
}
|
|
|
|
static void tegra_dsi_set_timeout(struct tegra_dsi *dsi, unsigned long bclk,
|
|
unsigned int vrefresh)
|
|
{
|
|
unsigned int timeout;
|
|
u32 value;
|
|
|
|
/* one frame high-speed transmission timeout */
|
|
timeout = (bclk / vrefresh) / 512;
|
|
value = DSI_TIMEOUT_LRX(0x2000) | DSI_TIMEOUT_HTX(timeout);
|
|
tegra_dsi_writel(dsi, value, DSI_TIMEOUT_0);
|
|
|
|
/* 2 ms peripheral timeout for panel */
|
|
timeout = 2 * bclk / 512 * 1000;
|
|
value = DSI_TIMEOUT_PR(timeout) | DSI_TIMEOUT_TA(0x2000);
|
|
tegra_dsi_writel(dsi, value, DSI_TIMEOUT_1);
|
|
|
|
value = DSI_TALLY_TA(0) | DSI_TALLY_LRX(0) | DSI_TALLY_HTX(0);
|
|
tegra_dsi_writel(dsi, value, DSI_TO_TALLY);
|
|
|
|
if (dsi->slave)
|
|
tegra_dsi_set_timeout(dsi->slave, bclk, vrefresh);
|
|
}
|
|
|
|
static void tegra_dsi_disable(struct tegra_dsi *dsi)
|
|
{
|
|
u32 value;
|
|
|
|
if (dsi->slave) {
|
|
tegra_dsi_ganged_disable(dsi->slave);
|
|
tegra_dsi_ganged_disable(dsi);
|
|
}
|
|
|
|
value = tegra_dsi_readl(dsi, DSI_POWER_CONTROL);
|
|
value &= ~DSI_POWER_CONTROL_ENABLE;
|
|
tegra_dsi_writel(dsi, value, DSI_POWER_CONTROL);
|
|
|
|
if (dsi->slave)
|
|
tegra_dsi_disable(dsi->slave);
|
|
|
|
usleep_range(5000, 10000);
|
|
}
|
|
|
|
static void tegra_dsi_soft_reset(struct tegra_dsi *dsi)
|
|
{
|
|
u32 value;
|
|
|
|
value = tegra_dsi_readl(dsi, DSI_POWER_CONTROL);
|
|
value &= ~DSI_POWER_CONTROL_ENABLE;
|
|
tegra_dsi_writel(dsi, value, DSI_POWER_CONTROL);
|
|
|
|
usleep_range(300, 1000);
|
|
|
|
value = tegra_dsi_readl(dsi, DSI_POWER_CONTROL);
|
|
value |= DSI_POWER_CONTROL_ENABLE;
|
|
tegra_dsi_writel(dsi, value, DSI_POWER_CONTROL);
|
|
|
|
usleep_range(300, 1000);
|
|
|
|
value = tegra_dsi_readl(dsi, DSI_TRIGGER);
|
|
if (value)
|
|
tegra_dsi_writel(dsi, 0, DSI_TRIGGER);
|
|
|
|
if (dsi->slave)
|
|
tegra_dsi_soft_reset(dsi->slave);
|
|
}
|
|
|
|
static void tegra_dsi_connector_reset(struct drm_connector *connector)
|
|
{
|
|
struct tegra_dsi_state *state;
|
|
|
|
kfree(connector->state);
|
|
connector->state = NULL;
|
|
|
|
state = kzalloc(sizeof(*state), GFP_KERNEL);
|
|
if (state)
|
|
connector->state = &state->base;
|
|
}
|
|
|
|
static struct drm_connector_state *
|
|
tegra_dsi_connector_duplicate_state(struct drm_connector *connector)
|
|
{
|
|
struct tegra_dsi_state *state = to_dsi_state(connector->state);
|
|
struct tegra_dsi_state *copy;
|
|
|
|
copy = kmemdup(state, sizeof(*state), GFP_KERNEL);
|
|
if (!copy)
|
|
return NULL;
|
|
|
|
return ©->base;
|
|
}
|
|
|
|
static const struct drm_connector_funcs tegra_dsi_connector_funcs = {
|
|
.dpms = drm_atomic_helper_connector_dpms,
|
|
.reset = tegra_dsi_connector_reset,
|
|
.detect = tegra_output_connector_detect,
|
|
.fill_modes = drm_helper_probe_single_connector_modes,
|
|
.destroy = tegra_output_connector_destroy,
|
|
.atomic_duplicate_state = tegra_dsi_connector_duplicate_state,
|
|
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
|
|
};
|
|
|
|
static enum drm_mode_status
|
|
tegra_dsi_connector_mode_valid(struct drm_connector *connector,
|
|
struct drm_display_mode *mode)
|
|
{
|
|
return MODE_OK;
|
|
}
|
|
|
|
static const struct drm_connector_helper_funcs tegra_dsi_connector_helper_funcs = {
|
|
.get_modes = tegra_output_connector_get_modes,
|
|
.mode_valid = tegra_dsi_connector_mode_valid,
|
|
.best_encoder = tegra_output_connector_best_encoder,
|
|
};
|
|
|
|
static const struct drm_encoder_funcs tegra_dsi_encoder_funcs = {
|
|
.destroy = tegra_output_encoder_destroy,
|
|
};
|
|
|
|
static void tegra_dsi_encoder_disable(struct drm_encoder *encoder)
|
|
{
|
|
struct tegra_output *output = encoder_to_output(encoder);
|
|
struct tegra_dc *dc = to_tegra_dc(encoder->crtc);
|
|
struct tegra_dsi *dsi = to_dsi(output);
|
|
u32 value;
|
|
int err;
|
|
|
|
if (output->panel)
|
|
drm_panel_disable(output->panel);
|
|
|
|
tegra_dsi_video_disable(dsi);
|
|
|
|
/*
|
|
* The following accesses registers of the display controller, so make
|
|
* sure it's only executed when the output is attached to one.
|
|
*/
|
|
if (dc) {
|
|
value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS);
|
|
value &= ~DSI_ENABLE;
|
|
tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS);
|
|
|
|
tegra_dc_commit(dc);
|
|
}
|
|
|
|
err = tegra_dsi_wait_idle(dsi, 100);
|
|
if (err < 0)
|
|
dev_dbg(dsi->dev, "failed to idle DSI: %d\n", err);
|
|
|
|
tegra_dsi_soft_reset(dsi);
|
|
|
|
if (output->panel)
|
|
drm_panel_unprepare(output->panel);
|
|
|
|
tegra_dsi_disable(dsi);
|
|
|
|
return;
|
|
}
|
|
|
|
static void tegra_dsi_encoder_enable(struct drm_encoder *encoder)
|
|
{
|
|
struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
|
|
struct tegra_output *output = encoder_to_output(encoder);
|
|
struct tegra_dc *dc = to_tegra_dc(encoder->crtc);
|
|
struct tegra_dsi *dsi = to_dsi(output);
|
|
struct tegra_dsi_state *state;
|
|
u32 value;
|
|
|
|
state = tegra_dsi_get_state(dsi);
|
|
|
|
tegra_dsi_set_timeout(dsi, state->bclk, state->vrefresh);
|
|
|
|
/*
|
|
* The D-PHY timing fields are expressed in byte-clock cycles, so
|
|
* multiply the period by 8.
|
|
*/
|
|
tegra_dsi_set_phy_timing(dsi, state->period * 8, &state->timing);
|
|
|
|
if (output->panel)
|
|
drm_panel_prepare(output->panel);
|
|
|
|
tegra_dsi_configure(dsi, dc->pipe, mode);
|
|
|
|
/* enable display controller */
|
|
value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS);
|
|
value |= DSI_ENABLE;
|
|
tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS);
|
|
|
|
tegra_dc_commit(dc);
|
|
|
|
/* enable DSI controller */
|
|
tegra_dsi_enable(dsi);
|
|
|
|
if (output->panel)
|
|
drm_panel_enable(output->panel);
|
|
|
|
return;
|
|
}
|
|
|
|
static int
|
|
tegra_dsi_encoder_atomic_check(struct drm_encoder *encoder,
|
|
struct drm_crtc_state *crtc_state,
|
|
struct drm_connector_state *conn_state)
|
|
{
|
|
struct tegra_output *output = encoder_to_output(encoder);
|
|
struct tegra_dsi_state *state = to_dsi_state(conn_state);
|
|
struct tegra_dc *dc = to_tegra_dc(conn_state->crtc);
|
|
struct tegra_dsi *dsi = to_dsi(output);
|
|
unsigned int scdiv;
|
|
unsigned long plld;
|
|
int err;
|
|
|
|
state->pclk = crtc_state->mode.clock * 1000;
|
|
|
|
err = tegra_dsi_get_muldiv(dsi->format, &state->mul, &state->div);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
state->lanes = tegra_dsi_get_lanes(dsi);
|
|
|
|
err = tegra_dsi_get_format(dsi->format, &state->format);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
state->vrefresh = drm_mode_vrefresh(&crtc_state->mode);
|
|
|
|
/* compute byte clock */
|
|
state->bclk = (state->pclk * state->mul) / (state->div * state->lanes);
|
|
|
|
DRM_DEBUG_KMS("mul: %u, div: %u, lanes: %u\n", state->mul, state->div,
|
|
state->lanes);
|
|
DRM_DEBUG_KMS("format: %u, vrefresh: %u\n", state->format,
|
|
state->vrefresh);
|
|
DRM_DEBUG_KMS("bclk: %lu\n", state->bclk);
|
|
|
|
/*
|
|
* Compute bit clock and round up to the next MHz.
|
|
*/
|
|
plld = DIV_ROUND_UP(state->bclk * 8, USEC_PER_SEC) * USEC_PER_SEC;
|
|
state->period = DIV_ROUND_CLOSEST(NSEC_PER_SEC, plld);
|
|
|
|
err = mipi_dphy_timing_get_default(&state->timing, state->period);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = mipi_dphy_timing_validate(&state->timing, state->period);
|
|
if (err < 0) {
|
|
dev_err(dsi->dev, "failed to validate D-PHY timing: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* We divide the frequency by two here, but we make up for that by
|
|
* setting the shift clock divider (further below) to half of the
|
|
* correct value.
|
|
*/
|
|
plld /= 2;
|
|
|
|
/*
|
|
* Derive pixel clock from bit clock using the shift clock divider.
|
|
* Note that this is only half of what we would expect, but we need
|
|
* that to make up for the fact that we divided the bit clock by a
|
|
* factor of two above.
|
|
*
|
|
* It's not clear exactly why this is necessary, but the display is
|
|
* not working properly otherwise. Perhaps the PLLs cannot generate
|
|
* frequencies sufficiently high.
|
|
*/
|
|
scdiv = ((8 * state->mul) / (state->div * state->lanes)) - 2;
|
|
|
|
err = tegra_dc_state_setup_clock(dc, crtc_state, dsi->clk_parent,
|
|
plld, scdiv);
|
|
if (err < 0) {
|
|
dev_err(output->dev, "failed to setup CRTC state: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static const struct drm_encoder_helper_funcs tegra_dsi_encoder_helper_funcs = {
|
|
.disable = tegra_dsi_encoder_disable,
|
|
.enable = tegra_dsi_encoder_enable,
|
|
.atomic_check = tegra_dsi_encoder_atomic_check,
|
|
};
|
|
|
|
static int tegra_dsi_pad_enable(struct tegra_dsi *dsi)
|
|
{
|
|
u32 value;
|
|
|
|
value = DSI_PAD_CONTROL_VS1_PULLDN(0) | DSI_PAD_CONTROL_VS1_PDIO(0);
|
|
tegra_dsi_writel(dsi, value, DSI_PAD_CONTROL_0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_dsi_pad_calibrate(struct tegra_dsi *dsi)
|
|
{
|
|
u32 value;
|
|
|
|
tegra_dsi_writel(dsi, 0, DSI_PAD_CONTROL_0);
|
|
tegra_dsi_writel(dsi, 0, DSI_PAD_CONTROL_1);
|
|
tegra_dsi_writel(dsi, 0, DSI_PAD_CONTROL_2);
|
|
tegra_dsi_writel(dsi, 0, DSI_PAD_CONTROL_3);
|
|
tegra_dsi_writel(dsi, 0, DSI_PAD_CONTROL_4);
|
|
|
|
/* start calibration */
|
|
tegra_dsi_pad_enable(dsi);
|
|
|
|
value = DSI_PAD_SLEW_UP(0x7) | DSI_PAD_SLEW_DN(0x7) |
|
|
DSI_PAD_LP_UP(0x1) | DSI_PAD_LP_DN(0x1) |
|
|
DSI_PAD_OUT_CLK(0x0);
|
|
tegra_dsi_writel(dsi, value, DSI_PAD_CONTROL_2);
|
|
|
|
value = DSI_PAD_PREEMP_PD_CLK(0x3) | DSI_PAD_PREEMP_PU_CLK(0x3) |
|
|
DSI_PAD_PREEMP_PD(0x03) | DSI_PAD_PREEMP_PU(0x3);
|
|
tegra_dsi_writel(dsi, value, DSI_PAD_CONTROL_3);
|
|
|
|
return tegra_mipi_calibrate(dsi->mipi);
|
|
}
|
|
|
|
static int tegra_dsi_init(struct host1x_client *client)
|
|
{
|
|
struct drm_device *drm = dev_get_drvdata(client->parent);
|
|
struct tegra_dsi *dsi = host1x_client_to_dsi(client);
|
|
int err;
|
|
|
|
reset_control_deassert(dsi->rst);
|
|
|
|
err = tegra_dsi_pad_calibrate(dsi);
|
|
if (err < 0) {
|
|
dev_err(dsi->dev, "MIPI calibration failed: %d\n", err);
|
|
goto reset;
|
|
}
|
|
|
|
/* Gangsters must not register their own outputs. */
|
|
if (!dsi->master) {
|
|
dsi->output.dev = client->dev;
|
|
|
|
drm_connector_init(drm, &dsi->output.connector,
|
|
&tegra_dsi_connector_funcs,
|
|
DRM_MODE_CONNECTOR_DSI);
|
|
drm_connector_helper_add(&dsi->output.connector,
|
|
&tegra_dsi_connector_helper_funcs);
|
|
dsi->output.connector.dpms = DRM_MODE_DPMS_OFF;
|
|
|
|
drm_encoder_init(drm, &dsi->output.encoder,
|
|
&tegra_dsi_encoder_funcs,
|
|
DRM_MODE_ENCODER_DSI);
|
|
drm_encoder_helper_add(&dsi->output.encoder,
|
|
&tegra_dsi_encoder_helper_funcs);
|
|
|
|
drm_mode_connector_attach_encoder(&dsi->output.connector,
|
|
&dsi->output.encoder);
|
|
drm_connector_register(&dsi->output.connector);
|
|
|
|
err = tegra_output_init(drm, &dsi->output);
|
|
if (err < 0) {
|
|
dev_err(client->dev,
|
|
"failed to initialize output: %d\n",
|
|
err);
|
|
goto reset;
|
|
}
|
|
|
|
dsi->output.encoder.possible_crtcs = 0x3;
|
|
}
|
|
|
|
if (IS_ENABLED(CONFIG_DEBUG_FS)) {
|
|
err = tegra_dsi_debugfs_init(dsi, drm->primary);
|
|
if (err < 0)
|
|
dev_err(dsi->dev, "debugfs setup failed: %d\n", err);
|
|
}
|
|
|
|
return 0;
|
|
|
|
reset:
|
|
reset_control_assert(dsi->rst);
|
|
return err;
|
|
}
|
|
|
|
static int tegra_dsi_exit(struct host1x_client *client)
|
|
{
|
|
struct tegra_dsi *dsi = host1x_client_to_dsi(client);
|
|
|
|
tegra_output_exit(&dsi->output);
|
|
|
|
if (IS_ENABLED(CONFIG_DEBUG_FS))
|
|
tegra_dsi_debugfs_exit(dsi);
|
|
|
|
reset_control_assert(dsi->rst);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct host1x_client_ops dsi_client_ops = {
|
|
.init = tegra_dsi_init,
|
|
.exit = tegra_dsi_exit,
|
|
};
|
|
|
|
static int tegra_dsi_setup_clocks(struct tegra_dsi *dsi)
|
|
{
|
|
struct clk *parent;
|
|
int err;
|
|
|
|
parent = clk_get_parent(dsi->clk);
|
|
if (!parent)
|
|
return -EINVAL;
|
|
|
|
err = clk_set_parent(parent, dsi->clk_parent);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const char * const error_report[16] = {
|
|
"SoT Error",
|
|
"SoT Sync Error",
|
|
"EoT Sync Error",
|
|
"Escape Mode Entry Command Error",
|
|
"Low-Power Transmit Sync Error",
|
|
"Peripheral Timeout Error",
|
|
"False Control Error",
|
|
"Contention Detected",
|
|
"ECC Error, single-bit",
|
|
"ECC Error, multi-bit",
|
|
"Checksum Error",
|
|
"DSI Data Type Not Recognized",
|
|
"DSI VC ID Invalid",
|
|
"Invalid Transmission Length",
|
|
"Reserved",
|
|
"DSI Protocol Violation",
|
|
};
|
|
|
|
static ssize_t tegra_dsi_read_response(struct tegra_dsi *dsi,
|
|
const struct mipi_dsi_msg *msg,
|
|
size_t count)
|
|
{
|
|
u8 *rx = msg->rx_buf;
|
|
unsigned int i, j, k;
|
|
size_t size = 0;
|
|
u16 errors;
|
|
u32 value;
|
|
|
|
/* read and parse packet header */
|
|
value = tegra_dsi_readl(dsi, DSI_RD_DATA);
|
|
|
|
switch (value & 0x3f) {
|
|
case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT:
|
|
errors = (value >> 8) & 0xffff;
|
|
dev_dbg(dsi->dev, "Acknowledge and error report: %04x\n",
|
|
errors);
|
|
for (i = 0; i < ARRAY_SIZE(error_report); i++)
|
|
if (errors & BIT(i))
|
|
dev_dbg(dsi->dev, " %2u: %s\n", i,
|
|
error_report[i]);
|
|
break;
|
|
|
|
case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:
|
|
rx[0] = (value >> 8) & 0xff;
|
|
size = 1;
|
|
break;
|
|
|
|
case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE:
|
|
rx[0] = (value >> 8) & 0xff;
|
|
rx[1] = (value >> 16) & 0xff;
|
|
size = 2;
|
|
break;
|
|
|
|
case MIPI_DSI_RX_DCS_LONG_READ_RESPONSE:
|
|
size = ((value >> 8) & 0xff00) | ((value >> 8) & 0xff);
|
|
break;
|
|
|
|
case MIPI_DSI_RX_GENERIC_LONG_READ_RESPONSE:
|
|
size = ((value >> 8) & 0xff00) | ((value >> 8) & 0xff);
|
|
break;
|
|
|
|
default:
|
|
dev_err(dsi->dev, "unhandled response type: %02x\n",
|
|
value & 0x3f);
|
|
return -EPROTO;
|
|
}
|
|
|
|
size = min(size, msg->rx_len);
|
|
|
|
if (msg->rx_buf && size > 0) {
|
|
for (i = 0, j = 0; i < count - 1; i++, j += 4) {
|
|
u8 *rx = msg->rx_buf + j;
|
|
|
|
value = tegra_dsi_readl(dsi, DSI_RD_DATA);
|
|
|
|
for (k = 0; k < 4 && (j + k) < msg->rx_len; k++)
|
|
rx[j + k] = (value >> (k << 3)) & 0xff;
|
|
}
|
|
}
|
|
|
|
return size;
|
|
}
|
|
|
|
static int tegra_dsi_transmit(struct tegra_dsi *dsi, unsigned long timeout)
|
|
{
|
|
tegra_dsi_writel(dsi, DSI_TRIGGER_HOST, DSI_TRIGGER);
|
|
|
|
timeout = jiffies + msecs_to_jiffies(timeout);
|
|
|
|
while (time_before(jiffies, timeout)) {
|
|
u32 value = tegra_dsi_readl(dsi, DSI_TRIGGER);
|
|
if ((value & DSI_TRIGGER_HOST) == 0)
|
|
return 0;
|
|
|
|
usleep_range(1000, 2000);
|
|
}
|
|
|
|
DRM_DEBUG_KMS("timeout waiting for transmission to complete\n");
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
static int tegra_dsi_wait_for_response(struct tegra_dsi *dsi,
|
|
unsigned long timeout)
|
|
{
|
|
timeout = jiffies + msecs_to_jiffies(250);
|
|
|
|
while (time_before(jiffies, timeout)) {
|
|
u32 value = tegra_dsi_readl(dsi, DSI_STATUS);
|
|
u8 count = value & 0x1f;
|
|
|
|
if (count > 0)
|
|
return count;
|
|
|
|
usleep_range(1000, 2000);
|
|
}
|
|
|
|
DRM_DEBUG_KMS("peripheral returned no data\n");
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
static void tegra_dsi_writesl(struct tegra_dsi *dsi, unsigned long offset,
|
|
const void *buffer, size_t size)
|
|
{
|
|
const u8 *buf = buffer;
|
|
size_t i, j;
|
|
u32 value;
|
|
|
|
for (j = 0; j < size; j += 4) {
|
|
value = 0;
|
|
|
|
for (i = 0; i < 4 && j + i < size; i++)
|
|
value |= buf[j + i] << (i << 3);
|
|
|
|
tegra_dsi_writel(dsi, value, DSI_WR_DATA);
|
|
}
|
|
}
|
|
|
|
static ssize_t tegra_dsi_host_transfer(struct mipi_dsi_host *host,
|
|
const struct mipi_dsi_msg *msg)
|
|
{
|
|
struct tegra_dsi *dsi = host_to_tegra(host);
|
|
struct mipi_dsi_packet packet;
|
|
const u8 *header;
|
|
size_t count;
|
|
ssize_t err;
|
|
u32 value;
|
|
|
|
err = mipi_dsi_create_packet(&packet, msg);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
header = packet.header;
|
|
|
|
/* maximum FIFO depth is 1920 words */
|
|
if (packet.size > dsi->video_fifo_depth * 4)
|
|
return -ENOSPC;
|
|
|
|
/* reset underflow/overflow flags */
|
|
value = tegra_dsi_readl(dsi, DSI_STATUS);
|
|
if (value & (DSI_STATUS_UNDERFLOW | DSI_STATUS_OVERFLOW)) {
|
|
value = DSI_HOST_CONTROL_FIFO_RESET;
|
|
tegra_dsi_writel(dsi, value, DSI_HOST_CONTROL);
|
|
usleep_range(10, 20);
|
|
}
|
|
|
|
value = tegra_dsi_readl(dsi, DSI_POWER_CONTROL);
|
|
value |= DSI_POWER_CONTROL_ENABLE;
|
|
tegra_dsi_writel(dsi, value, DSI_POWER_CONTROL);
|
|
|
|
usleep_range(5000, 10000);
|
|
|
|
value = DSI_HOST_CONTROL_CRC_RESET | DSI_HOST_CONTROL_TX_TRIG_HOST |
|
|
DSI_HOST_CONTROL_CS | DSI_HOST_CONTROL_ECC;
|
|
|
|
if ((msg->flags & MIPI_DSI_MSG_USE_LPM) == 0)
|
|
value |= DSI_HOST_CONTROL_HS;
|
|
|
|
/*
|
|
* The host FIFO has a maximum of 64 words, so larger transmissions
|
|
* need to use the video FIFO.
|
|
*/
|
|
if (packet.size > dsi->host_fifo_depth * 4)
|
|
value |= DSI_HOST_CONTROL_FIFO_SEL;
|
|
|
|
tegra_dsi_writel(dsi, value, DSI_HOST_CONTROL);
|
|
|
|
/*
|
|
* For reads and messages with explicitly requested ACK, generate a
|
|
* BTA sequence after the transmission of the packet.
|
|
*/
|
|
if ((msg->flags & MIPI_DSI_MSG_REQ_ACK) ||
|
|
(msg->rx_buf && msg->rx_len > 0)) {
|
|
value = tegra_dsi_readl(dsi, DSI_HOST_CONTROL);
|
|
value |= DSI_HOST_CONTROL_PKT_BTA;
|
|
tegra_dsi_writel(dsi, value, DSI_HOST_CONTROL);
|
|
}
|
|
|
|
value = DSI_CONTROL_LANES(0) | DSI_CONTROL_HOST_ENABLE;
|
|
tegra_dsi_writel(dsi, value, DSI_CONTROL);
|
|
|
|
/* write packet header, ECC is generated by hardware */
|
|
value = header[2] << 16 | header[1] << 8 | header[0];
|
|
tegra_dsi_writel(dsi, value, DSI_WR_DATA);
|
|
|
|
/* write payload (if any) */
|
|
if (packet.payload_length > 0)
|
|
tegra_dsi_writesl(dsi, DSI_WR_DATA, packet.payload,
|
|
packet.payload_length);
|
|
|
|
err = tegra_dsi_transmit(dsi, 250);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if ((msg->flags & MIPI_DSI_MSG_REQ_ACK) ||
|
|
(msg->rx_buf && msg->rx_len > 0)) {
|
|
err = tegra_dsi_wait_for_response(dsi, 250);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
count = err;
|
|
|
|
value = tegra_dsi_readl(dsi, DSI_RD_DATA);
|
|
switch (value) {
|
|
case 0x84:
|
|
/*
|
|
dev_dbg(dsi->dev, "ACK\n");
|
|
*/
|
|
break;
|
|
|
|
case 0x87:
|
|
/*
|
|
dev_dbg(dsi->dev, "ESCAPE\n");
|
|
*/
|
|
break;
|
|
|
|
default:
|
|
dev_err(dsi->dev, "unknown status: %08x\n", value);
|
|
break;
|
|
}
|
|
|
|
if (count > 1) {
|
|
err = tegra_dsi_read_response(dsi, msg, count);
|
|
if (err < 0)
|
|
dev_err(dsi->dev,
|
|
"failed to parse response: %zd\n",
|
|
err);
|
|
else {
|
|
/*
|
|
* For read commands, return the number of
|
|
* bytes returned by the peripheral.
|
|
*/
|
|
count = err;
|
|
}
|
|
}
|
|
} else {
|
|
/*
|
|
* For write commands, we have transmitted the 4-byte header
|
|
* plus the variable-length payload.
|
|
*/
|
|
count = 4 + packet.payload_length;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
static int tegra_dsi_ganged_setup(struct tegra_dsi *dsi)
|
|
{
|
|
struct clk *parent;
|
|
int err;
|
|
|
|
/* make sure both DSI controllers share the same PLL */
|
|
parent = clk_get_parent(dsi->slave->clk);
|
|
if (!parent)
|
|
return -EINVAL;
|
|
|
|
err = clk_set_parent(parent, dsi->clk_parent);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_dsi_host_attach(struct mipi_dsi_host *host,
|
|
struct mipi_dsi_device *device)
|
|
{
|
|
struct tegra_dsi *dsi = host_to_tegra(host);
|
|
|
|
dsi->flags = device->mode_flags;
|
|
dsi->format = device->format;
|
|
dsi->lanes = device->lanes;
|
|
|
|
if (dsi->slave) {
|
|
int err;
|
|
|
|
dev_dbg(dsi->dev, "attaching dual-channel device %s\n",
|
|
dev_name(&device->dev));
|
|
|
|
err = tegra_dsi_ganged_setup(dsi);
|
|
if (err < 0) {
|
|
dev_err(dsi->dev, "failed to set up ganged mode: %d\n",
|
|
err);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Slaves don't have a panel associated with them, so they provide
|
|
* merely the second channel.
|
|
*/
|
|
if (!dsi->master) {
|
|
struct tegra_output *output = &dsi->output;
|
|
|
|
output->panel = of_drm_find_panel(device->dev.of_node);
|
|
if (output->panel && output->connector.dev) {
|
|
drm_panel_attach(output->panel, &output->connector);
|
|
drm_helper_hpd_irq_event(output->connector.dev);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_dsi_host_detach(struct mipi_dsi_host *host,
|
|
struct mipi_dsi_device *device)
|
|
{
|
|
struct tegra_dsi *dsi = host_to_tegra(host);
|
|
struct tegra_output *output = &dsi->output;
|
|
|
|
if (output->panel && &device->dev == output->panel->dev) {
|
|
output->panel = NULL;
|
|
|
|
if (output->connector.dev)
|
|
drm_helper_hpd_irq_event(output->connector.dev);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct mipi_dsi_host_ops tegra_dsi_host_ops = {
|
|
.attach = tegra_dsi_host_attach,
|
|
.detach = tegra_dsi_host_detach,
|
|
.transfer = tegra_dsi_host_transfer,
|
|
};
|
|
|
|
static int tegra_dsi_ganged_probe(struct tegra_dsi *dsi)
|
|
{
|
|
struct device_node *np;
|
|
|
|
np = of_parse_phandle(dsi->dev->of_node, "nvidia,ganged-mode", 0);
|
|
if (np) {
|
|
struct platform_device *gangster = of_find_device_by_node(np);
|
|
|
|
dsi->slave = platform_get_drvdata(gangster);
|
|
of_node_put(np);
|
|
|
|
if (!dsi->slave)
|
|
return -EPROBE_DEFER;
|
|
|
|
dsi->slave->master = dsi;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_dsi_probe(struct platform_device *pdev)
|
|
{
|
|
struct tegra_dsi *dsi;
|
|
struct resource *regs;
|
|
int err;
|
|
|
|
dsi = devm_kzalloc(&pdev->dev, sizeof(*dsi), GFP_KERNEL);
|
|
if (!dsi)
|
|
return -ENOMEM;
|
|
|
|
dsi->output.dev = dsi->dev = &pdev->dev;
|
|
dsi->video_fifo_depth = 1920;
|
|
dsi->host_fifo_depth = 64;
|
|
|
|
err = tegra_dsi_ganged_probe(dsi);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = tegra_output_probe(&dsi->output);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
dsi->output.connector.polled = DRM_CONNECTOR_POLL_HPD;
|
|
|
|
/*
|
|
* Assume these values by default. When a DSI peripheral driver
|
|
* attaches to the DSI host, the parameters will be taken from
|
|
* the attached device.
|
|
*/
|
|
dsi->flags = MIPI_DSI_MODE_VIDEO;
|
|
dsi->format = MIPI_DSI_FMT_RGB888;
|
|
dsi->lanes = 4;
|
|
|
|
dsi->rst = devm_reset_control_get(&pdev->dev, "dsi");
|
|
if (IS_ERR(dsi->rst))
|
|
return PTR_ERR(dsi->rst);
|
|
|
|
dsi->clk = devm_clk_get(&pdev->dev, NULL);
|
|
if (IS_ERR(dsi->clk)) {
|
|
dev_err(&pdev->dev, "cannot get DSI clock\n");
|
|
err = PTR_ERR(dsi->clk);
|
|
goto reset;
|
|
}
|
|
|
|
err = clk_prepare_enable(dsi->clk);
|
|
if (err < 0) {
|
|
dev_err(&pdev->dev, "cannot enable DSI clock\n");
|
|
goto reset;
|
|
}
|
|
|
|
dsi->clk_lp = devm_clk_get(&pdev->dev, "lp");
|
|
if (IS_ERR(dsi->clk_lp)) {
|
|
dev_err(&pdev->dev, "cannot get low-power clock\n");
|
|
err = PTR_ERR(dsi->clk_lp);
|
|
goto disable_clk;
|
|
}
|
|
|
|
err = clk_prepare_enable(dsi->clk_lp);
|
|
if (err < 0) {
|
|
dev_err(&pdev->dev, "cannot enable low-power clock\n");
|
|
goto disable_clk;
|
|
}
|
|
|
|
dsi->clk_parent = devm_clk_get(&pdev->dev, "parent");
|
|
if (IS_ERR(dsi->clk_parent)) {
|
|
dev_err(&pdev->dev, "cannot get parent clock\n");
|
|
err = PTR_ERR(dsi->clk_parent);
|
|
goto disable_clk_lp;
|
|
}
|
|
|
|
dsi->vdd = devm_regulator_get(&pdev->dev, "avdd-dsi-csi");
|
|
if (IS_ERR(dsi->vdd)) {
|
|
dev_err(&pdev->dev, "cannot get VDD supply\n");
|
|
err = PTR_ERR(dsi->vdd);
|
|
goto disable_clk_lp;
|
|
}
|
|
|
|
err = regulator_enable(dsi->vdd);
|
|
if (err < 0) {
|
|
dev_err(&pdev->dev, "cannot enable VDD supply\n");
|
|
goto disable_clk_lp;
|
|
}
|
|
|
|
err = tegra_dsi_setup_clocks(dsi);
|
|
if (err < 0) {
|
|
dev_err(&pdev->dev, "cannot setup clocks\n");
|
|
goto disable_vdd;
|
|
}
|
|
|
|
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
dsi->regs = devm_ioremap_resource(&pdev->dev, regs);
|
|
if (IS_ERR(dsi->regs)) {
|
|
err = PTR_ERR(dsi->regs);
|
|
goto disable_vdd;
|
|
}
|
|
|
|
dsi->mipi = tegra_mipi_request(&pdev->dev);
|
|
if (IS_ERR(dsi->mipi)) {
|
|
err = PTR_ERR(dsi->mipi);
|
|
goto disable_vdd;
|
|
}
|
|
|
|
dsi->host.ops = &tegra_dsi_host_ops;
|
|
dsi->host.dev = &pdev->dev;
|
|
|
|
err = mipi_dsi_host_register(&dsi->host);
|
|
if (err < 0) {
|
|
dev_err(&pdev->dev, "failed to register DSI host: %d\n", err);
|
|
goto mipi_free;
|
|
}
|
|
|
|
INIT_LIST_HEAD(&dsi->client.list);
|
|
dsi->client.ops = &dsi_client_ops;
|
|
dsi->client.dev = &pdev->dev;
|
|
|
|
err = host1x_client_register(&dsi->client);
|
|
if (err < 0) {
|
|
dev_err(&pdev->dev, "failed to register host1x client: %d\n",
|
|
err);
|
|
goto unregister;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, dsi);
|
|
|
|
return 0;
|
|
|
|
unregister:
|
|
mipi_dsi_host_unregister(&dsi->host);
|
|
mipi_free:
|
|
tegra_mipi_free(dsi->mipi);
|
|
disable_vdd:
|
|
regulator_disable(dsi->vdd);
|
|
disable_clk_lp:
|
|
clk_disable_unprepare(dsi->clk_lp);
|
|
disable_clk:
|
|
clk_disable_unprepare(dsi->clk);
|
|
reset:
|
|
reset_control_assert(dsi->rst);
|
|
return err;
|
|
}
|
|
|
|
static int tegra_dsi_remove(struct platform_device *pdev)
|
|
{
|
|
struct tegra_dsi *dsi = platform_get_drvdata(pdev);
|
|
int err;
|
|
|
|
err = host1x_client_unregister(&dsi->client);
|
|
if (err < 0) {
|
|
dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
|
|
err);
|
|
return err;
|
|
}
|
|
|
|
tegra_output_remove(&dsi->output);
|
|
|
|
mipi_dsi_host_unregister(&dsi->host);
|
|
tegra_mipi_free(dsi->mipi);
|
|
|
|
regulator_disable(dsi->vdd);
|
|
clk_disable_unprepare(dsi->clk_lp);
|
|
clk_disable_unprepare(dsi->clk);
|
|
reset_control_assert(dsi->rst);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id tegra_dsi_of_match[] = {
|
|
{ .compatible = "nvidia,tegra210-dsi", },
|
|
{ .compatible = "nvidia,tegra132-dsi", },
|
|
{ .compatible = "nvidia,tegra124-dsi", },
|
|
{ .compatible = "nvidia,tegra114-dsi", },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, tegra_dsi_of_match);
|
|
|
|
struct platform_driver tegra_dsi_driver = {
|
|
.driver = {
|
|
.name = "tegra-dsi",
|
|
.of_match_table = tegra_dsi_of_match,
|
|
},
|
|
.probe = tegra_dsi_probe,
|
|
.remove = tegra_dsi_remove,
|
|
};
|