forked from Minki/linux
e2215321ff
A race condition currently exists on Tegra, where it can happen that a monitor attached via HDMI isn't detected during the initial FB helper setup, but the hotplug event happens too early to be processed by the poll helpers because they haven't been initialized yet. This happens because on some boards the HDMI driver can control the regulator that supplies the +5V pin on the HDMI connector. Therefore depending on the timing between the initialization of the HDMI driver and the rest of DRM, it's possible that the monitor returns the hotplug signal right within the window where we would miss it. Unfortunately, drm_kms_helper_poll_init() will wreak havoc when called before at least some parts of the FB helpers have been set up. This commit fixes this by splitting out the minimum of initialization required to make drm_kms_helper_poll_init() work into a separate function that can be called early. It is then safe to move all of the poll helper initialization to an earlier point in time (before the HDMI output driver has a chance to enable the +5V supply). That way if the hotplug signal is returned before the initial FB helper setup, the monitor will be forcefully detected at that point, and if the hotplug signal is returned after that it will be properly handled by the poll helpers. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
299 lines
7.7 KiB
C
299 lines
7.7 KiB
C
/*
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* Copyright (C) 2012 Avionic Design GmbH
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* Copyright (C) 2012-2013 NVIDIA CORPORATION. All rights reserved.
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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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#ifndef HOST1X_DRM_H
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#define HOST1X_DRM_H 1
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#include <uapi/drm/tegra_drm.h>
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#include <linux/host1x.h>
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#include <drm/drmP.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_edid.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_fixed.h>
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struct reset_control;
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struct tegra_fb {
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struct drm_framebuffer base;
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struct tegra_bo **planes;
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unsigned int num_planes;
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};
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#ifdef CONFIG_DRM_TEGRA_FBDEV
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struct tegra_fbdev {
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struct drm_fb_helper base;
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struct tegra_fb *fb;
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};
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#endif
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struct tegra_drm {
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struct drm_device *drm;
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struct mutex clients_lock;
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struct list_head clients;
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#ifdef CONFIG_DRM_TEGRA_FBDEV
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struct tegra_fbdev *fbdev;
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#endif
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};
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struct tegra_drm_client;
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struct tegra_drm_context {
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struct tegra_drm_client *client;
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struct host1x_channel *channel;
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struct list_head list;
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};
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struct tegra_drm_client_ops {
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int (*open_channel)(struct tegra_drm_client *client,
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struct tegra_drm_context *context);
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void (*close_channel)(struct tegra_drm_context *context);
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int (*is_addr_reg)(struct device *dev, u32 class, u32 offset);
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int (*submit)(struct tegra_drm_context *context,
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struct drm_tegra_submit *args, struct drm_device *drm,
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struct drm_file *file);
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};
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int tegra_drm_submit(struct tegra_drm_context *context,
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struct drm_tegra_submit *args, struct drm_device *drm,
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struct drm_file *file);
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struct tegra_drm_client {
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struct host1x_client base;
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struct list_head list;
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const struct tegra_drm_client_ops *ops;
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};
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static inline struct tegra_drm_client *
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host1x_to_drm_client(struct host1x_client *client)
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{
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return container_of(client, struct tegra_drm_client, base);
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}
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int tegra_drm_register_client(struct tegra_drm *tegra,
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struct tegra_drm_client *client);
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int tegra_drm_unregister_client(struct tegra_drm *tegra,
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struct tegra_drm_client *client);
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int tegra_drm_init(struct tegra_drm *tegra, struct drm_device *drm);
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int tegra_drm_exit(struct tegra_drm *tegra);
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struct tegra_dc_soc_info;
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struct tegra_output;
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struct tegra_dc {
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struct host1x_client client;
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struct device *dev;
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spinlock_t lock;
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struct drm_crtc base;
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int pipe;
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struct clk *clk;
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struct reset_control *rst;
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void __iomem *regs;
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int irq;
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struct tegra_output *rgb;
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struct list_head list;
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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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/* page-flip handling */
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struct drm_pending_vblank_event *event;
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const struct tegra_dc_soc_info *soc;
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};
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static inline struct tegra_dc *
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host1x_client_to_dc(struct host1x_client *client)
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{
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return container_of(client, struct tegra_dc, client);
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}
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static inline struct tegra_dc *to_tegra_dc(struct drm_crtc *crtc)
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{
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return crtc ? container_of(crtc, struct tegra_dc, base) : NULL;
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}
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static inline void tegra_dc_writel(struct tegra_dc *dc, unsigned long value,
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unsigned long reg)
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{
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writel(value, dc->regs + (reg << 2));
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}
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static inline unsigned long tegra_dc_readl(struct tegra_dc *dc,
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unsigned long reg)
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{
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return readl(dc->regs + (reg << 2));
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}
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struct tegra_dc_window {
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struct {
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unsigned int x;
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unsigned int y;
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unsigned int w;
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unsigned int h;
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} src;
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struct {
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unsigned int x;
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unsigned int y;
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unsigned int w;
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unsigned int h;
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} dst;
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unsigned int bits_per_pixel;
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unsigned int format;
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unsigned int swap;
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unsigned int stride[2];
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unsigned long base[3];
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bool bottom_up;
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bool tiled;
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};
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/* from dc.c */
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void tegra_dc_enable_vblank(struct tegra_dc *dc);
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void tegra_dc_disable_vblank(struct tegra_dc *dc);
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void tegra_dc_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file);
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struct tegra_output_ops {
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int (*enable)(struct tegra_output *output);
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int (*disable)(struct tegra_output *output);
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int (*setup_clock)(struct tegra_output *output, struct clk *clk,
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unsigned long pclk, unsigned int *div);
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int (*check_mode)(struct tegra_output *output,
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struct drm_display_mode *mode,
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enum drm_mode_status *status);
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enum drm_connector_status (*detect)(struct tegra_output *output);
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};
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enum tegra_output_type {
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TEGRA_OUTPUT_RGB,
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TEGRA_OUTPUT_HDMI,
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TEGRA_OUTPUT_DSI,
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TEGRA_OUTPUT_EDP,
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};
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struct tegra_output {
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struct device_node *of_node;
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struct device *dev;
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const struct tegra_output_ops *ops;
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enum tegra_output_type type;
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struct drm_panel *panel;
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struct i2c_adapter *ddc;
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const struct edid *edid;
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unsigned int hpd_irq;
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int hpd_gpio;
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struct drm_encoder encoder;
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struct drm_connector connector;
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};
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static inline struct tegra_output *encoder_to_output(struct drm_encoder *e)
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{
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return container_of(e, struct tegra_output, encoder);
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}
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static inline struct tegra_output *connector_to_output(struct drm_connector *c)
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{
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return container_of(c, struct tegra_output, connector);
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}
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static inline int tegra_output_enable(struct tegra_output *output)
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{
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if (output && output->ops && output->ops->enable)
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return output->ops->enable(output);
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return output ? -ENOSYS : -EINVAL;
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}
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static inline int tegra_output_disable(struct tegra_output *output)
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{
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if (output && output->ops && output->ops->disable)
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return output->ops->disable(output);
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return output ? -ENOSYS : -EINVAL;
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}
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static inline int tegra_output_setup_clock(struct tegra_output *output,
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struct clk *clk, unsigned long pclk,
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unsigned int *div)
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{
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if (output && output->ops && output->ops->setup_clock)
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return output->ops->setup_clock(output, clk, pclk, div);
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return output ? -ENOSYS : -EINVAL;
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}
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static inline int tegra_output_check_mode(struct tegra_output *output,
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struct drm_display_mode *mode,
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enum drm_mode_status *status)
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{
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if (output && output->ops && output->ops->check_mode)
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return output->ops->check_mode(output, mode, status);
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return output ? -ENOSYS : -EINVAL;
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}
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/* from rgb.c */
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int tegra_dc_rgb_probe(struct tegra_dc *dc);
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int tegra_dc_rgb_remove(struct tegra_dc *dc);
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int tegra_dc_rgb_init(struct drm_device *drm, struct tegra_dc *dc);
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int tegra_dc_rgb_exit(struct tegra_dc *dc);
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/* from output.c */
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int tegra_output_probe(struct tegra_output *output);
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int tegra_output_remove(struct tegra_output *output);
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int tegra_output_init(struct drm_device *drm, struct tegra_output *output);
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int tegra_output_exit(struct tegra_output *output);
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/* from dpaux.c */
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struct tegra_dpaux;
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struct drm_dp_link;
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struct tegra_dpaux *tegra_dpaux_find_by_of_node(struct device_node *np);
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enum drm_connector_status tegra_dpaux_detect(struct tegra_dpaux *dpaux);
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int tegra_dpaux_attach(struct tegra_dpaux *dpaux, struct tegra_output *output);
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int tegra_dpaux_detach(struct tegra_dpaux *dpaux);
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int tegra_dpaux_enable(struct tegra_dpaux *dpaux);
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int tegra_dpaux_disable(struct tegra_dpaux *dpaux);
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int tegra_dpaux_prepare(struct tegra_dpaux *dpaux, u8 encoding);
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int tegra_dpaux_train(struct tegra_dpaux *dpaux, struct drm_dp_link *link,
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u8 pattern);
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/* from fb.c */
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struct tegra_bo *tegra_fb_get_plane(struct drm_framebuffer *framebuffer,
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unsigned int index);
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bool tegra_fb_is_bottom_up(struct drm_framebuffer *framebuffer);
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bool tegra_fb_is_tiled(struct drm_framebuffer *framebuffer);
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int tegra_drm_fb_prepare(struct drm_device *drm);
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int tegra_drm_fb_init(struct drm_device *drm);
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void tegra_drm_fb_exit(struct drm_device *drm);
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#ifdef CONFIG_DRM_TEGRA_FBDEV
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void tegra_fbdev_restore_mode(struct tegra_fbdev *fbdev);
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#endif
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extern struct platform_driver tegra_dc_driver;
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extern struct platform_driver tegra_dsi_driver;
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extern struct platform_driver tegra_sor_driver;
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extern struct platform_driver tegra_hdmi_driver;
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extern struct platform_driver tegra_dpaux_driver;
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extern struct platform_driver tegra_gr2d_driver;
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extern struct platform_driver tegra_gr3d_driver;
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#endif /* HOST1X_DRM_H */
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