diff options
author | Sinclair Yeh <syeh@vmware.com> | 2017-05-19 22:57:06 -0700 |
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committer | Sinclair Yeh <syeh@vmware.com> | 2017-06-14 19:39:41 +0200 |
commit | 3c5a89bce93a6b19eb4580411196c04abff094bf (patch) | |
tree | 2b671166ad6ee92d523809b33211313b802c3eb4 /drm_bridge.h | |
parent | 90732761ce998497c52a0997721e244a942b88ec (diff) |
vmwgfx: Update stand alone to v4.11
* Skipped update to drm_mm and drm_vma_manager because the switch to
using interval tree makes porting difficult.
* Added memdup_user_nul(), but replaced kmalloc_track_caller() with
kmalloc() due to a compilation error.
* Removed building and usage of debugfs_crc
* VMWGFX_COMPAT_NO_VAF no longer seems to be required
* Tested on
CentOS 6.5, RHEL 6.8: 2.6.32-696
RHEL 7.3: 3.10.0-514
Ubuntu 14.04: 4.2.0-35
Ubuntu 16.04: 4.4.0-78
Ubuntu 16.04: 4.12-rc1
Signed-off-by: Sinclair Yeh <syeh@vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Diffstat (limited to 'drm_bridge.h')
-rw-r--r-- | drm_bridge.h | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/drm_bridge.h b/drm_bridge.h new file mode 100644 index 0000000..389aeb2 --- /dev/null +++ b/drm_bridge.h @@ -0,0 +1,226 @@ +/* + * Copyright (c) 2016 Intel Corporation + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting documentation, and + * that the name of the copyright holders not be used in advertising or + * publicity pertaining to distribution of the software without specific, + * written prior permission. The copyright holders make no representations + * about the suitability of this software for any purpose. It is provided "as + * is" without express or implied warranty. + * + * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO + * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE + * OF THIS SOFTWARE. + */ + +#ifndef __DRM_BRIDGE_H__ +#define __DRM_BRIDGE_H__ + +#include <linux/list.h> +#include <linux/ctype.h> +#include "drm_mode_object.h" +#include "drm_modes.h" + +struct drm_bridge; + +/** + * struct drm_bridge_funcs - drm_bridge control functions + */ +struct drm_bridge_funcs { + /** + * @attach: + * + * This callback is invoked whenever our bridge is being attached to a + * &drm_encoder. + * + * The attach callback is optional. + * + * RETURNS: + * + * Zero on success, error code on failure. + */ + int (*attach)(struct drm_bridge *bridge); + + /** + * @detach: + * + * This callback is invoked whenever our bridge is being detached from a + * &drm_encoder. + * + * The detach callback is optional. + */ + void (*detach)(struct drm_bridge *bridge); + + /** + * @mode_fixup: + * + * This callback is used to validate and adjust a mode. The paramater + * mode is the display mode that should be fed to the next element in + * the display chain, either the final &drm_connector or the next + * &drm_bridge. The parameter adjusted_mode is the input mode the bridge + * requires. It can be modified by this callback and does not need to + * match mode. + * + * This is the only hook that allows a bridge to reject a modeset. If + * this function passes all other callbacks must succeed for this + * configuration. + * + * The mode_fixup callback is optional. + * + * NOTE: + * + * This function is called in the check phase of atomic modesets, which + * can be aborted for any reason (including on userspace's request to + * just check whether a configuration would be possible). Drivers MUST + * NOT touch any persistent state (hardware or software) or data + * structures except the passed in @state parameter. + * + * RETURNS: + * + * True if an acceptable configuration is possible, false if the modeset + * operation should be rejected. + */ + bool (*mode_fixup)(struct drm_bridge *bridge, + const struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode); + /** + * @disable: + * + * This callback should disable the bridge. It is called right before + * the preceding element in the display pipe is disabled. If the + * preceding element is a bridge this means it's called before that + * bridge's @disable vfunc. If the preceding element is a &drm_encoder + * it's called right before the &drm_encoder_helper_funcs.disable, + * &drm_encoder_helper_funcs.prepare or &drm_encoder_helper_funcs.dpms + * hook. + * + * The bridge can assume that the display pipe (i.e. clocks and timing + * signals) feeding it is still running when this callback is called. + * + * The disable callback is optional. + */ + void (*disable)(struct drm_bridge *bridge); + + /** + * @post_disable: + * + * This callback should disable the bridge. It is called right after the + * preceding element in the display pipe is disabled. If the preceding + * element is a bridge this means it's called after that bridge's + * @post_disable function. If the preceding element is a &drm_encoder + * it's called right after the encoder's + * &drm_encoder_helper_funcs.disable, &drm_encoder_helper_funcs.prepare + * or &drm_encoder_helper_funcs.dpms hook. + * + * The bridge must assume that the display pipe (i.e. clocks and timing + * singals) feeding it is no longer running when this callback is + * called. + * + * The post_disable callback is optional. + */ + void (*post_disable)(struct drm_bridge *bridge); + + /** + * @mode_set: + * + * This callback should set the given mode on the bridge. It is called + * after the @mode_set callback for the preceding element in the display + * pipeline has been called already. If the bridge is the first element + * then this would be &drm_encoder_helper_funcs.mode_set. The display + * pipe (i.e. clocks and timing signals) is off when this function is + * called. + */ + void (*mode_set)(struct drm_bridge *bridge, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode); + /** + * @pre_enable: + * + * This callback should enable the bridge. It is called right before + * the preceding element in the display pipe is enabled. If the + * preceding element is a bridge this means it's called before that + * bridge's @pre_enable function. If the preceding element is a + * &drm_encoder it's called right before the encoder's + * &drm_encoder_helper_funcs.enable, &drm_encoder_helper_funcs.commit or + * &drm_encoder_helper_funcs.dpms hook. + * + * The display pipe (i.e. clocks and timing signals) feeding this bridge + * will not yet be running when this callback is called. The bridge must + * not enable the display link feeding the next bridge in the chain (if + * there is one) when this callback is called. + * + * The pre_enable callback is optional. + */ + void (*pre_enable)(struct drm_bridge *bridge); + + /** + * @enable: + * + * This callback should enable the bridge. It is called right after + * the preceding element in the display pipe is enabled. If the + * preceding element is a bridge this means it's called after that + * bridge's @enable function. If the preceding element is a + * &drm_encoder it's called right after the encoder's + * &drm_encoder_helper_funcs.enable, &drm_encoder_helper_funcs.commit or + * &drm_encoder_helper_funcs.dpms hook. + * + * The bridge can assume that the display pipe (i.e. clocks and timing + * signals) feeding it is running when this callback is called. This + * callback must enable the display link feeding the next bridge in the + * chain if there is one. + * + * The enable callback is optional. + */ + void (*enable)(struct drm_bridge *bridge); +}; + +/** + * struct drm_bridge - central DRM bridge control structure + * @dev: DRM device this bridge belongs to + * @encoder: encoder to which this bridge is connected + * @next: the next bridge in the encoder chain + * @of_node: device node pointer to the bridge + * @list: to keep track of all added bridges + * @funcs: control functions + * @driver_private: pointer to the bridge driver's internal context + */ +struct drm_bridge { + struct drm_device *dev; + struct drm_encoder *encoder; + struct drm_bridge *next; +#ifdef CONFIG_OF + struct device_node *of_node; +#endif + struct list_head list; + + const struct drm_bridge_funcs *funcs; + void *driver_private; +}; + +int drm_bridge_add(struct drm_bridge *bridge); +void drm_bridge_remove(struct drm_bridge *bridge); +#ifndef VMWGFX_STANDALONE +struct drm_bridge *of_drm_find_bridge(struct device_node *np); +#endif +int drm_bridge_attach(struct drm_encoder *encoder, struct drm_bridge *bridge, + struct drm_bridge *previous); + +bool drm_bridge_mode_fixup(struct drm_bridge *bridge, + const struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode); +void drm_bridge_disable(struct drm_bridge *bridge); +void drm_bridge_post_disable(struct drm_bridge *bridge); +void drm_bridge_mode_set(struct drm_bridge *bridge, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode); +void drm_bridge_pre_enable(struct drm_bridge *bridge); +void drm_bridge_enable(struct drm_bridge *bridge); + +#endif |