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Merge tag 'topic/drm-misc-2016-05-08' of git://anongit.freedesktop.org/drm-intel into drm-next

Browse Source 
Refcounting is hard, so here's a quick pull request with the one-liner to
fix up i915. Otherwise just a few other small things I picked up. Plus the
regression fix from Marten for rmfb behaviour that lingered around forever
since no testers. Feel free to cherry-pick that over to drm-fixes, but
given that there's not many who seemed to have cared, meh.

* tag 'topic/drm-misc-2016-05-08' of git://anongit.freedesktop.org/drm-intel:
  drm/i915: Correctly refcount connectors in hw state readou
  drm/panel: Flesh out kerneldoc
  drm: Add gpu.tmpl docbook to MAINTAINERS entry
  drm/core: Do not preserve framebuffer on rmfb, v4.
  drm: Fix up markup fumble
  drm/fb_helper: Fix a few typos
This commit is contained in:
Dave Airlie 2016-05-09 10:16:50 +10:00
commit 2958cf0ee2
8 changed files with 195 additions and 14 deletions
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12
Documentation/DocBook/gpu.tmpl
View File

@ -1671,17 +1671,23 @@ void intel_crt_init(struct drm_device *dev)
!Pdrivers/gpu/drm/drm_crtc.c Tile group
</sect2>
<sect2>
<title>Bridges</title>
<title>Bridges</title>
<sect3>
<title>Overview</title>
<title>Overview</title>
!Pdrivers/gpu/drm/drm_bridge.c overview
</sect3>
<sect3>
<title>Default bridge callback sequence</title>
<title>Default bridge callback sequence</title>
!Pdrivers/gpu/drm/drm_bridge.c bridge callbacks
</sect3>
!Edrivers/gpu/drm/drm_bridge.c
</sect2>
<sect2>
<title>Panel Helper Reference</title>
!Iinclude/drm/drm_panel.h
!Edrivers/gpu/drm/drm_panel.c
!Pdrivers/gpu/drm/drm_panel.c drm panel
</sect2>
</sect1>
<!-- Internals: kms properties -->

1
MAINTAINERS
View File

@ -3765,6 +3765,7 @@ T: git git://people.freedesktop.org/~airlied/linux
S: Maintained
F: drivers/gpu/drm/
F: drivers/gpu/vga/
F: Documentation/DocBook/gpu.*
F: include/drm/
F: include/uapi/drm/

63
drivers/gpu/drm/drm_crtc.c
View File

@ -3462,6 +3462,24 @@ int drm_mode_addfb2(struct drm_device *dev,
return 0;
}
struct drm_mode_rmfb_work {
struct work_struct work;
struct list_head fbs;
};
static void drm_mode_rmfb_work_fn(struct work_struct *w)
{
struct drm_mode_rmfb_work *arg = container_of(w, typeof(*arg), work);
while (!list_empty(&arg->fbs)) {
struct drm_framebuffer *fb =
list_first_entry(&arg->fbs, typeof(*fb), filp_head);
list_del_init(&fb->filp_head);
drm_framebuffer_remove(fb);
}
}
/**
* drm_mode_rmfb - remove an FB from the configuration
* @dev: drm device for the ioctl
@ -3502,12 +3520,29 @@ int drm_mode_rmfb(struct drm_device *dev,
list_del_init(&fb->filp_head);
mutex_unlock(&file_priv->fbs_lock);
/* we now own the reference that was stored in the fbs list */
drm_framebuffer_unreference(fb);
/* drop the reference we picked up in framebuffer lookup */
drm_framebuffer_unreference(fb);
/*
* we now own the reference that was stored in the fbs list
*
* drm_framebuffer_remove may fail with -EINTR on pending signals,
* so run this in a separate stack as there's no way to correctly
* handle this after the fb is already removed from the lookup table.
*/
if (drm_framebuffer_read_refcount(fb) > 1) {
struct drm_mode_rmfb_work arg;
INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn);
INIT_LIST_HEAD(&arg.fbs);
list_add_tail(&fb->filp_head, &arg.fbs);
schedule_work(&arg.work);
flush_work(&arg.work);
destroy_work_on_stack(&arg.work);
} else
drm_framebuffer_unreference(fb);
return 0;
fail_unref:
@ -3657,7 +3692,6 @@ int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
return ret;
}
/**
* drm_fb_release - remove and free the FBs on this file
* @priv: drm file for the ioctl
@ -3672,6 +3706,9 @@ int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
void drm_fb_release(struct drm_file *priv)
{
struct drm_framebuffer *fb, *tfb;
struct drm_mode_rmfb_work arg;
INIT_LIST_HEAD(&arg.fbs);
/*
* When the file gets released that means no one else can access the fb
@ -3684,10 +3721,22 @@ void drm_fb_release(struct drm_file *priv)
* at it any more.
*/
list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) {
list_del_init(&fb->filp_head);
if (drm_framebuffer_read_refcount(fb) > 1) {
list_move_tail(&fb->filp_head, &arg.fbs);
} else {
list_del_init(&fb->filp_head);
/* This drops the fpriv->fbs reference. */
drm_framebuffer_unreference(fb);
/* This drops the fpriv->fbs reference. */
drm_framebuffer_unreference(fb);
}
}
if (!list_empty(&arg.fbs)) {
INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn);
schedule_work(&arg.work);
flush_work(&arg.work);
destroy_work_on_stack(&arg.work);
}
}

6
drivers/gpu/drm/drm_fb_helper.c
View File

@ -2177,8 +2177,8 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper)
* cmdline option.
*
* The other option is to just disable fbdev emulation since very likely the
* first modest from userspace will crash in the same way, and is even easier to
* debug. This can be done by setting the drm_kms_helper.fbdev_emulation=0
* first modeset from userspace will crash in the same way, and is even easier
* to debug. This can be done by setting the drm_kms_helper.fbdev_emulation=0
* kernel cmdline option.
*
* RETURNS:
@ -2223,7 +2223,7 @@ EXPORT_SYMBOL(drm_fb_helper_initial_config);
* hotplug interrupt).
*
* Note that drivers may call this even before calling
* drm_fb_helper_initial_config but only aftert drm_fb_helper_init. This allows
* drm_fb_helper_initial_config but only after drm_fb_helper_init. This allows
* for a race-free fbcon setup and will make sure that the fbdev emulation will
* not miss any hotplug events.
*

61
drivers/gpu/drm/drm_panel.c
View File

@ -30,12 +30,36 @@
static DEFINE_MUTEX(panel_lock);
static LIST_HEAD(panel_list);
/**
* DOC: drm panel
*
* The DRM panel helpers allow drivers to register panel objects with a
* central registry and provide functions to retrieve those panels in display
* drivers.
*/
/**
* drm_panel_init - initialize a panel
* @panel: DRM panel
*
* Sets up internal fields of the panel so that it can subsequently be added
* to the registry.
*/
void drm_panel_init(struct drm_panel *panel)
{
INIT_LIST_HEAD(&panel->list);
}
EXPORT_SYMBOL(drm_panel_init);
/**
* drm_panel_add - add a panel to the global registry
* @panel: panel to add
*
* Add a panel to the global registry so that it can be looked up by display
* drivers.
*
* Return: 0 on success or a negative error code on failure.
*/
int drm_panel_add(struct drm_panel *panel)
{
mutex_lock(&panel_lock);
@ -46,6 +70,12 @@ int drm_panel_add(struct drm_panel *panel)
}
EXPORT_SYMBOL(drm_panel_add);
/**
* drm_panel_remove - remove a panel from the global registry
* @panel: DRM panel
*
* Removes a panel from the global registry.
*/
void drm_panel_remove(struct drm_panel *panel)
{
mutex_lock(&panel_lock);
@ -54,6 +84,18 @@ void drm_panel_remove(struct drm_panel *panel)
}
EXPORT_SYMBOL(drm_panel_remove);
/**
* drm_panel_attach - attach a panel to a connector
* @panel: DRM panel
* @connector: DRM connector
*
* After obtaining a pointer to a DRM panel a display driver calls this
* function to attach a panel to a connector.
*
* An error is returned if the panel is already attached to another connector.
*
* Return: 0 on success or a negative error code on failure.
*/
int drm_panel_attach(struct drm_panel *panel, struct drm_connector *connector)
{
if (panel->connector)
@ -66,6 +108,15 @@ int drm_panel_attach(struct drm_panel *panel, struct drm_connector *connector)
}
EXPORT_SYMBOL(drm_panel_attach);
/**
* drm_panel_detach - detach a panel from a connector
* @panel: DRM panel
*
* Detaches a panel from the connector it is attached to. If a panel is not
* attached to any connector this is effectively a no-op.
*
* Return: 0 on success or a negative error code on failure.
*/
int drm_panel_detach(struct drm_panel *panel)
{
panel->connector = NULL;
@ -76,6 +127,16 @@ int drm_panel_detach(struct drm_panel *panel)
EXPORT_SYMBOL(drm_panel_detach);
#ifdef CONFIG_OF
/**
* of_drm_find_panel - look up a panel using a device tree node
* @np: device tree node of the panel
*
* Searches the set of registered panels for one that matches the given device
* tree node. If a matching panel is found, return a pointer to it.
*
* Return: A pointer to the panel registered for the specified device tree
* node or NULL if no panel matching the device tree node can be found.
*/
struct drm_panel *of_drm_find_panel(struct device_node *np)
{
struct drm_panel *panel;

5
drivers/gpu/drm/i915/intel_display.c
View File

@ -12032,11 +12032,16 @@ static void intel_modeset_update_connector_atomic_state(struct drm_device *dev)
struct intel_connector *connector;
for_each_intel_connector(dev, connector) {
if (connector->base.state->crtc)
drm_connector_unreference(&connector->base);
if (connector->base.encoder) {
connector->base.state->best_encoder =
connector->base.encoder;
connector->base.state->crtc =
connector->base.encoder->crtc;
drm_connector_reference(&connector->base);
} else {
connector->base.state->best_encoder = NULL;
connector->base.state->crtc = NULL;

2
include/drm/drm_modeset_helper_vtables.h
View File

@ -672,7 +672,7 @@ struct drm_connector_helper_funcs {
* fixed panel can also manually add specific modes using
* drm_mode_probed_add(). Drivers which manually add modes should also
* make sure that the @display_info, @width_mm and @height_mm fields of the
* struct #drm_connector are filled in.
* struct &drm_connector are filled in.
*
* Virtual drivers that just want some standard VESA mode with a given
* resolution can call drm_add_modes_noedid(), and mark the preferred

59
include/drm/drm_panel.h
View File

@ -75,6 +75,14 @@ struct drm_panel_funcs {
struct display_timing *timings);
};
/**
* struct drm_panel - DRM panel object
* @drm: DRM device owning the panel
* @connector: DRM connector that the panel is attached to
* @dev: parent device of the panel
* @funcs: operations that can be performed on the panel
* @list: panel entry in registry
*/
struct drm_panel {
struct drm_device *drm;
struct drm_connector *connector;
@ -85,6 +93,17 @@ struct drm_panel {
struct list_head list;
};
/**
* drm_disable_unprepare - power off a panel
* @panel: DRM panel
*
* Calling this function will completely power off a panel (assert the panel's
* reset, turn off power supplies, ...). After this function has completed, it
* is usually no longer possible to communicate with the panel until another
* call to drm_panel_prepare().
*
* Return: 0 on success or a negative error code on failure.
*/
static inline int drm_panel_unprepare(struct drm_panel *panel)
{
if (panel && panel->funcs && panel->funcs->unprepare)
@ -93,6 +112,16 @@ static inline int drm_panel_unprepare(struct drm_panel *panel)
return panel ? -ENOSYS : -EINVAL;
}
/**
* drm_panel_disable - disable a panel
* @panel: DRM panel
*
* This will typically turn off the panel's backlight or disable the display
* drivers. For smart panels it should still be possible to communicate with
* the integrated circuitry via any command bus after this call.
*
* Return: 0 on success or a negative error code on failure.
*/
static inline int drm_panel_disable(struct drm_panel *panel)
{
if (panel && panel->funcs && panel->funcs->disable)
@ -101,6 +130,16 @@ static inline int drm_panel_disable(struct drm_panel *panel)
return panel ? -ENOSYS : -EINVAL;
}
/**
* drm_panel_prepare - power on a panel
* @panel: DRM panel
*
* Calling this function will enable power and deassert any reset signals to
* the panel. After this has completed it is possible to communicate with any
* integrated circuitry via a command bus.
*
* Return: 0 on success or a negative error code on failure.
*/
static inline int drm_panel_prepare(struct drm_panel *panel)
{
if (panel && panel->funcs && panel->funcs->prepare)
@ -109,6 +148,16 @@ static inline int drm_panel_prepare(struct drm_panel *panel)
return panel ? -ENOSYS : -EINVAL;
}
/**
* drm_panel_enable - enable a panel
* @panel: DRM panel
*
* Calling this function will cause the panel display drivers to be turned on
* and the backlight to be enabled. Content will be visible on screen after
* this call completes.
*
* Return: 0 on success or a negative error code on failure.
*/
static inline int drm_panel_enable(struct drm_panel *panel)
{
if (panel && panel->funcs && panel->funcs->enable)
@ -117,6 +166,16 @@ static inline int drm_panel_enable(struct drm_panel *panel)
return panel ? -ENOSYS : -EINVAL;
}
/**
* drm_panel_get_modes - probe the available display modes of a panel
* @panel: DRM panel
*
* The modes probed from the panel are automatically added to the connector
* that the panel is attached to.
*
* Return: The number of modes available from the panel on success or a
* negative error code on failure.
*/
static inline int drm_panel_get_modes(struct drm_panel *panel)
{
if (panel && panel->funcs && panel->funcs->get_modes)