Re: [PATCH i-g-t 1/3] lib/igt_kms migrate existing documentation to header file.

Re: [PATCH i-g-t 1/3] lib/igt_kms migrate existing documentation to header file.

[Daniel Vetter]

On Mon, Dec 21, 2015 at 01:07:23PM +0200, Marius Vlad wrote:
> Signed-off-by: Marius Vlad <marius.c.vlad@intel.com>

Hm, why that? Given that this is against the usual style in igt this needs
some justification, not an empty commit message.

Thanks, Daniel

> ---
>  lib/igt_kms.c | 321 +-------------------------------------
>  lib/igt_kms.h | 486 +++++++++++++++++++++++++++++++++++++++++++++++++---------
>  2 files changed, 418 insertions(+), 389 deletions(-)
> 
> diff --git a/lib/igt_kms.c b/lib/igt_kms.c
> index 5d5a95c..3dc559d 100644
> --- a/lib/igt_kms.c
> +++ b/lib/igt_kms.c
> @@ -88,23 +88,7 @@ static void update_edid_csum(unsigned char *edid)
>  #define EDID_NAME base_edid
>  #include "igt_edid_template.h"
>  
> -/**
> - * igt_kms_get_base_edid:
> - *
> - * Get the base edid block, which includes the following modes:
> - *
> - *  - 1920x1080 60Hz
> - *  - 1280x720 60Hz
> - *  - 1024x768 60Hz
> - *  - 800x600 60Hz
> - *  - 640x480 60Hz
> - *
> - * This can be extended with further features using functions such as
> - * #kmstest_edid_add_3d.
> - *
> - * Returns: a basic edid block
> - */
> -const unsigned char* igt_kms_get_base_edid(void)
> +const unsigned char *igt_kms_get_base_edid(void)
>  {
>  	update_edid_csum(base_edid);
>  
> @@ -128,59 +112,13 @@ const unsigned char* igt_kms_get_base_edid(void)
>  #define EDID_NAME alt_edid
>  #include "igt_edid_template.h"
>  
> -/**
> - * igt_kms_get_alt_edid:
> - *
> - * Get an alternate edid block, which includes the following modes:
> - *
> - *  - 1400x1050 60Hz
> - *  - 1920x1080 60Hz
> - *  - 1280x720 60Hz
> - *  - 1024x768 60Hz
> - *  - 800x600 60Hz
> - *  - 640x480 60Hz
> - *
> - * This can be extended with further features using functions such as
> - * #kmstest_edid_add_3d.
> - *
> - * Returns: an alternate edid block
> - */
> -const unsigned char* igt_kms_get_alt_edid(void)
> +const unsigned char *igt_kms_get_alt_edid(void)
>  {
>  	update_edid_csum(alt_edid);
>  
>  	return alt_edid;
>  }
>  
> -/**
> - * SECTION:igt_kms
> - * @short_description: Kernel modesetting support library
> - * @title: KMS
> - * @include: igt.h
> - *
> - * This library provides support to enumerate and set modeset configurations.
> - *
> - * There are two parts in this library: First the low level helper function
> - * which directly build on top of raw ioctls or the interfaces provided by
> - * libdrm. Those functions all have a kmstest_ prefix.
> - *
> - * The second part is a high-level library to manage modeset configurations
> - * which abstracts away some of the low-level details like the difference
> - * between legacy and universal plane support for setting cursors or in the
> - * future the difference between legacy and atomic commit. These high-level
> - * functions have all igt_ prefixes. This part is still very much work in
> - * progress and so also lacks a bit documentation for the individual functions.
> - *
> - * Note that this library's header pulls in the [i-g-t framebuffer](intel-gpu-tools-i-g-t-framebuffer.html)
> - * library as a dependency.
> - */
> -
> -/**
> - * kmstest_pipe_name:
> - * @pipe: display pipe
> - *
> - * Returns: String represnting @pipe, e.g. "A".
> - */
>  const char *kmstest_pipe_name(enum pipe pipe)
>  {
>  	const char *str[] = { "A", "B", "C" };
> @@ -191,12 +129,6 @@ const char *kmstest_pipe_name(enum pipe pipe)
>  	return str[pipe];
>  }
>  
> -/**
> - * kmstest_plane_name:
> - * @plane: display plane
> - *
> - * Returns: String represnting @pipe, e.g. "plane1".
> - */
>  const char *kmstest_plane_name(enum igt_plane plane)
>  {
>  	static const char *names[] = {
> @@ -235,12 +167,6 @@ static const char *mode_stereo_name(const drmModeModeInfo *mode)
>  	}
>  }
>  
> -/**
> - * kmstest_dump_mode:
> - * @mode: libdrm mode structure
> - *
> - * Prints @mode to stdout in a huma-readable form.
> - */
>  void kmstest_dump_mode(drmModeModeInfo *mode)
>  {
>  	const char *stereo = mode_stereo_name(mode);
> @@ -256,14 +182,6 @@ void kmstest_dump_mode(drmModeModeInfo *mode)
>  		 stereo ? stereo : "", stereo ? ")" : "");
>  }
>  
> -/**
> - * kmstest_get_pipe_from_crtc_id:
> - * @fd: DRM fd
> - * @crtc_id: DRM CRTC id
> - *
> - * Returns: The pipe number for the given DRM CRTC @crtc_id. This maps directly
> - * to an enum pipe value used in other helper functions.
> - */
>  int kmstest_get_pipe_from_crtc_id(int fd, int crtc_id)
>  {
>  	struct drm_i915_get_pipe_from_crtc_id pfci;
> @@ -317,11 +235,6 @@ err:
>  
>  static unsigned long orig_vt_mode = -1UL;
>  
> -/**
> - * kmstest_restore_vt_mode:
> - *
> - * Restore the VT mode in use before #kmstest_set_vt_graphics_mode was called.
> - */
>  void kmstest_restore_vt_mode(void)
>  {
>  	long ret;
> @@ -335,16 +248,6 @@ void kmstest_restore_vt_mode(void)
>  	}
>  }
>  
> -/**
> - * kmstest_set_vt_graphics_mode:
> - *
> - * Sets the controlling VT (if available) into graphics/raw mode and installs
> - * an igt exit handler to set the VT back to text mode on exit. Use
> - * #kmstest_restore_vt_mode to restore the previous VT mode manually.
> - *
> - * All kms tests must call this function to make sure that the fbcon doesn't
> - * interfere by e.g. blanking the screen.
> - */
>  void kmstest_set_vt_graphics_mode(void)
>  {
>  	long ret;
> @@ -367,16 +270,6 @@ static void reset_connectors_at_exit(int sig)
>  	igt_reset_connectors();
>  }
>  
> -/**
> - * kmstest_force_connector:
> - * @fd: drm file descriptor
> - * @connector: connector
> - * @state: state to force on @connector
> - *
> - * Force the specified state on the specified connector.
> - *
> - * Returns: true on success
> - */
>  bool kmstest_force_connector(int drm_fd, drmModeConnector *connector,
>  			     enum kmstest_force_connector_state state)
>  {
> @@ -459,18 +352,6 @@ bool kmstest_force_connector(int drm_fd, drmModeConnector *connector,
>  	return (ret == -1) ? false : true;
>  }
>  
> -/**
> - * kmstest_force_edid:
> - * @drm_fd: drm file descriptor
> - * @connector: connector to set @edid on
> - * @edid: An EDID data block
> - * @length: length of the EDID data. #EDID_LENGTH defines the standard EDID
> - * length
> - *
> - * Set the EDID data on @connector to @edid. See also #igt_kms_get_base_edid.
> - *
> - * If @length is zero, the forced EDID will be removed.
> - */
>  void kmstest_force_edid(int drm_fd, drmModeConnector *connector,
>  			const unsigned char *edid, size_t length)
>  {
> @@ -499,16 +380,6 @@ void kmstest_force_edid(int drm_fd, drmModeConnector *connector,
>  	igt_assert(ret != -1);
>  }
>  
> -/**
> - * kmstest_get_connector_default_mode:
> - * @drm_fd: DRM fd
> - * @connector: libdrm connector
> - * @mode: libdrm mode
> - *
> - * Retrieves the default mode for @connector and stores it in @mode.
> - *
> - * Returns: true on success, false on failure
> - */
>  bool kmstest_get_connector_default_mode(int drm_fd, drmModeConnector *connector,
>  					drmModeModeInfo *mode)
>  {
> @@ -532,16 +403,6 @@ bool kmstest_get_connector_default_mode(int drm_fd, drmModeConnector *connector,
>  	return true;
>  }
>  
> -/**
> - * kmstest_get_connector_config:
> - * @drm_fd: DRM fd
> - * @connector_id: DRM connector id
> - * @crtc_idx_mask: mask of allowed DRM CRTC indices
> - * @config: structure filled with the possible configuration
> - *
> - * This tries to find a suitable configuration for the given connector and CRTC
> - * constraint and fills it into @config.
> - */
>  bool kmstest_get_connector_config(int drm_fd, uint32_t connector_id,
>  				  unsigned long crtc_idx_mask,
>  				  struct kmstest_connector_config *config)
> @@ -633,12 +494,6 @@ err1:
>  	return false;
>  }
>  
> -/**
> - * kmstest_free_connector_config:
> - * @config: connector configuration structure
> - *
> - * Free any resources in @config allocated in kmstest_get_connector_config().
> - */
>  void kmstest_free_connector_config(struct kmstest_connector_config *config)
>  {
>  	drmModeFreeCrtc(config->crtc);
> @@ -646,14 +501,6 @@ void kmstest_free_connector_config(struct kmstest_connector_config *config)
>  	drmModeFreeConnector(config->connector);
>  }
>  
> -/**
> - * kmstest_set_connector_dpms:
> - * @fd: DRM fd
> - * @connector: libdrm connector
> - * @mode: DRM DPMS value
> - *
> - * This function sets the DPMS setting of @connector to @mode.
> - */
>  void kmstest_set_connector_dpms(int fd, drmModeConnector *connector, int mode)
>  {
>  	int i, dpms = 0;
> @@ -682,21 +529,6 @@ void kmstest_set_connector_dpms(int fd, drmModeConnector *connector, int mode)
>  					       dpms, mode) == 0);
>  }
>  
> -/**
> - * kmstest_get_property:
> - * @drm_fd: drm file descriptor
> - * @object_id: object whose properties we're going to get
> - * @object_type: type of obj_id (DRM_MODE_OBJECT_*)
> - * @name: name of the property we're going to get
> - * @prop_id: if not NULL, returns the property id
> - * @value: if not NULL, returns the property value
> - * @prop: if not NULL, returns the property, and the caller will have to free
> - *        it manually.
> - *
> - * Finds a property with the given name on the given object.
> - *
> - * Returns: true in case we found something.
> - */
>  bool
>  kmstest_get_property(int drm_fd, uint32_t object_id, uint32_t object_type,
>  		     const char *name, uint32_t *prop_id /* out */,
> @@ -734,16 +566,6 @@ kmstest_get_property(int drm_fd, uint32_t object_id, uint32_t object_type,
>  	return found;
>  }
>  
> -/**
> - * kmstest_edid_add_3d:
> - * @edid: an existing valid edid block
> - * @length: length of @edid
> - * @new_edid_ptr: pointer to where the new edid will be placed
> - * @new_length: pointer to the size of the new edid
> - *
> - * Makes a copy of an existing edid block and adds an extension indicating
> - * stereo 3D capabilities.
> - */
>  void kmstest_edid_add_3d(const unsigned char *edid, size_t length,
>  			 unsigned char *new_edid_ptr[], size_t *new_length)
>  {
> @@ -814,13 +636,6 @@ void kmstest_edid_add_3d(const unsigned char *edid, size_t length,
>  	new_edid[length + 127] = 256 - sum;
>  }
>  
> -/**
> - * kmstest_unset_all_crtcs:
> - * @drm_fd: the DRM fd
> - * @resources: libdrm resources pointer
> - *
> - * Disables all the screens.
> - */
>  void kmstest_unset_all_crtcs(int drm_fd, drmModeResPtr resources)
>  {
>  	int i, rc;
> @@ -964,15 +779,6 @@ static int get_drm_plane_type(int drm_fd, uint32_t plane_id)
>  	return DRM_PLANE_TYPE_OVERLAY;
>  }
>  
> -/**
> - * igt_display_init:
> - * @display: a pointer to an #igt_display_t structure
> - * @drm_fd: a drm file descriptor
> - *
> - * Initialize @display and allocate the various resources required. Use
> - * #igt_display_fini to release the resources when they are no longer required.
> - *
> - */
>  void igt_display_init(igt_display_t *display, int drm_fd)
>  {
>  	drmModeRes *resources;
> @@ -1171,13 +977,6 @@ static void igt_output_fini(igt_output_t *output)
>  	free(output->name);
>  }
>  
> -/**
> - * igt_display_fini:
> - * @display: a pointer to an #igt_display_t structure
> - *
> - * Release any resources associated with @display. This does not free @display
> - * itself.
> - */
>  void igt_display_fini(igt_display_t *display)
>  {
>  	int i;
> @@ -1648,24 +1447,6 @@ static int do_display_commit(igt_display_t *display,
>  	return 0;
>  }
>  
> -/**
> - * igt_display_commit2:
> - * @display: DRM device handle
> - * @s: Commit style
> - *
> - * Commits framebuffer and positioning changes to all planes of each display
> - * pipe, using a specific API to perform the programming.  This function should
> - * be used to exercise a specific driver programming API; igt_display_commit
> - * should be used instead if the API used is unimportant to the test being run.
> - *
> - * This function should only be used to commit changes that are expected to
> - * succeed, since any failure during the commit process will cause the IGT
> - * subtest to fail.  To commit changes that are expected to fail, use
> - * @igt_try_display_commit2 instead.
> - *
> - * Returns: 0 upon success.  This function will never return upon failure
> - * since igt_fail() at lower levels will longjmp out of it.
> - */
>  int igt_display_commit2(igt_display_t *display,
>  		       enum igt_commit_style s)
>  {
> @@ -1674,40 +1455,11 @@ int igt_display_commit2(igt_display_t *display,
>  	return 0;
>  }
>  
> -/**
> - * igt_display_try_commit2:
> - * @display: DRM device handle
> - * @s: Commit style
> - *
> - * Attempts to commit framebuffer and positioning changes to all planes of each
> - * display pipe.  This function should be used to commit changes that are
> - * expected to fail, so that the error code can be checked for correctness.
> - * For changes that are expected to succeed, use @igt_display_commit instead.
> - *
> - * Note that in non-atomic commit styles, no display programming will be
> - * performed after the first failure is encountered, so only some of the
> - * operations requested by a test may have been completed.  Tests that catch
> - * errors returned by this function should take care to restore the display to
> - * a sane state after a failure is detected.
> - *
> - * Returns: 0 upon success, otherwise the error code of the first error
> - * encountered.
> - */
>  int igt_display_try_commit2(igt_display_t *display, enum igt_commit_style s)
>  {
>  	return do_display_commit(display, s, false);
>  }
>  
> -/**
> - * igt_display_commit:
> - * @display: DRM device handle
> - *
> - * Commits framebuffer and positioning changes to all planes of each display
> - * pipe.
> - *
> - * Returns: 0 upon success.  This function will never return upon failure
> - * since igt_fail() at lower levels will longjmp out of it.
> - */
>  int igt_display_commit(igt_display_t *display)
>  {
>  	return igt_display_commit2(display, COMMIT_LEGACY);
> @@ -1723,15 +1475,6 @@ drmModeModeInfo *igt_output_get_mode(igt_output_t *output)
>  	return &output->config.default_mode;
>  }
>  
> -/**
> - * igt_output_override_mode:
> - * @output: Output of which the mode will be overridden
> - * @mode: New mode
> - *
> - * Overrides the output's mode with @mode, so that it is used instead of the
> - * mode obtained with get connectors. Note that the mode is used without
> - * checking if the output supports it, so this might lead to unexpected results.
> - */
>  void igt_output_override_mode(igt_output_t *output, drmModeModeInfo *mode)
>  {
>  	output->override_mode = *mode;
> @@ -1803,16 +1546,6 @@ void igt_plane_set_position(igt_plane_t *plane, int x, int y)
>  	plane->position_changed = true;
>  }
>  
> -/**
> - * igt_plane_set_size:
> - * @plane: plane pointer for which size to be set
> - * @w: width
> - * @h: height
> - *
> - * This function sets width and height for requested plane.
> - * New size will be committed at plane commit time via
> - * drmModeSetPlane().
> - */
>  void igt_plane_set_size(igt_plane_t *plane, int w, int h)
>  {
>  	igt_pipe_t *pipe = plane->pipe;
> @@ -1827,16 +1560,6 @@ void igt_plane_set_size(igt_plane_t *plane, int w, int h)
>  	plane->size_changed = true;
>  }
>  
> -/**
> - * igt_fb_set_position:
> - * @fb: framebuffer pointer
> - * @plane: plane
> - * @x: X position
> - * @y: Y position
> - *
> - * This function sets position for requested framebuffer as src to plane.
> - * New position will be committed at plane commit time via drmModeSetPlane().
> - */
>  void igt_fb_set_position(struct igt_fb *fb, igt_plane_t *plane,
>  	uint32_t x, uint32_t y)
>  {
> @@ -1852,17 +1575,6 @@ void igt_fb_set_position(struct igt_fb *fb, igt_plane_t *plane,
>  	plane->fb_changed = true;
>  }
>  
> -/**
> - * igt_fb_set_size:
> - * @fb: framebuffer pointer
> - * @plane: plane
> - * @w: width
> - * @h: height
> - *
> - * This function sets fetch rect size from requested framebuffer as src
> - * to plane. New size will be committed at plane commit time via
> - * drmModeSetPlane().
> - */
>  void igt_fb_set_size(struct igt_fb *fb, igt_plane_t *plane,
>  	uint32_t w, uint32_t h)
>  {
> @@ -1923,16 +1635,6 @@ void igt_plane_set_rotation(igt_plane_t *plane, igt_rotation_t rotation)
>  	plane->rotation_changed = true;
>  }
>  
> -/**
> - * igt_crtc_set_background:
> - * @pipe: pipe pointer to which background color to be set
> - * @background: background color value in BGR 16bpc
> - *
> - * Sets background color for requested pipe. Color value provided here
> - * will be actually submitted at output commit time via "background_color"
> - * property.
> - * For example to get red as background, set background = 0x00000000FFFF.
> - */
>  void igt_crtc_set_background(igt_pipe_t *pipe, uint64_t background)
>  {
>  	igt_display_t *display = pipe->display;
> @@ -1946,7 +1648,6 @@ void igt_crtc_set_background(igt_pipe_t *pipe, uint64_t background)
>  	pipe->background_changed = true;
>  }
>  
> -
>  void igt_wait_for_vblank(int drm_fd, enum pipe pipe)
>  {
>  	drmVBlank wait_vbl;
> @@ -1960,15 +1661,6 @@ void igt_wait_for_vblank(int drm_fd, enum pipe pipe)
>  	igt_assert(drmWaitVBlank(drm_fd, &wait_vbl) == 0);
>  }
>  
> -/**
> - * igt_enable_connectors:
> - *
> - * Force connectors to be enabled where this is known to work well. Use
> - * #igt_reset_connectors to revert the changes.
> - *
> - * An exit handler is installed to ensure connectors are reset when the test
> - * exits.
> - */
>  void igt_enable_connectors(void)
>  {
>  	drmModeRes *res;
> @@ -1983,8 +1675,8 @@ void igt_enable_connectors(void)
>  
>  		c = drmModeGetConnectorCurrent(drm_fd, res->connectors[i]);
>  
> -		/* don't attempt to force connectors that are already connected
> -		 */
> +		/* don't attempt to force connectors that
> +		 * are already connected */
>  		if (c->connection == DRM_MODE_CONNECTED)
>  			continue;
>  
> @@ -2001,11 +1693,6 @@ void igt_enable_connectors(void)
>  	close(drm_fd);
>  }
>  
> -/**
> - * igt_reset_connectors:
> - *
> - * Remove any forced state from the connectors.
> - */
>  void igt_reset_connectors(void)
>  {
>  	char **tmp;
> diff --git a/lib/igt_kms.h b/lib/igt_kms.h
> index 94f315f..2cc8a3b 100644
> --- a/lib/igt_kms.h
> +++ b/lib/igt_kms.h
> @@ -25,6 +25,30 @@
>   * 	Damien Lespiau <damien.lespiau@intel.com>
>   */
>  
> +/**
> + * SECTION:igt_kms
> + * @short_description: Kernel modesetting support library
> + * @title: KMS
> + * @include: igt.h
> + *
> + * This library provides support to enumerate and set modeset configurations.
> + *
> + * There are two parts in this library: First the low level helper function
> + * which directly build on top of raw ioctls or the interfaces provided by
> + * libdrm. Those functions all have a kmstest_ prefix.
> + *
> + * The second part is a high-level library to manage modeset configurations
> + * which abstracts away some of the low-level details like the difference
> + * between legacy and universal plane support for setting cursors or in the
> + * future the difference between legacy and atomic commit. These high-level
> + * functions have all igt_ prefixes. This part is still very much work in
> + * progress and so also lacks a bit documentation for the individual functions.
> + *
> + * Note that this library's header pulls in the [i-g-t
> + * framebuffer](intel-gpu-tools-Framebuffer.html) library as a
> + * dependency.
> + */
> +
>  #ifndef __IGT_KMS_H__
>  #define __IGT_KMS_H__
>  
> @@ -37,7 +61,6 @@
>  #include "igt_fb.h"
>  #include "ioctl_wrappers.h"
>  
> -/* Low-level helpers with kmstest_ prefix */
>  
>  enum pipe {
>          PIPE_ANY = -1,
> @@ -46,7 +69,6 @@ enum pipe {
>          PIPE_C,
>          I915_MAX_PIPES
>  };
> -const char *kmstest_pipe_name(enum pipe pipe);
>  
>  /* We namespace this enum to not conflict with the Android i915_drm.h */
>  enum igt_plane {
> @@ -57,8 +79,6 @@ enum igt_plane {
>          IGT_PLANE_CURSOR,
>  };
>  
> -const char *kmstest_plane_name(enum igt_plane plane);
> -
>  enum port {
>          PORT_A = 0,
>          PORT_B,
> @@ -68,44 +88,6 @@ enum port {
>          I915_MAX_PORTS
>  };
>  
> -/**
> - * kmstest_port_name:
> - * @port: display plane
> - *
> - * Returns: String representing @port, e.g. "A".
> - */
> -#define kmstest_port_name(port) ((port) + 'A')
> -
> -/**
> - * kmstest_encoder_type_str:
> - * @type: DRM_MODE_ENCODER_* enumeration value
> - *
> - * Returns: A string representing the drm encoder @type.
> - */
> -const char *kmstest_encoder_type_str(int type);
> -
> -/**
> - * kmstest_connector_status_str:
> - * @status: DRM_MODE_* connector status value
> - *
> - * Returns: A string representing the drm connector status @status.
> - */
> -const char *kmstest_connector_status_str(int status);
> -
> -/**
> - * kmstest_connector_type_str:
> - * @type: DRM_MODE_CONNECTOR_* enumeration value
> - *
> - * Returns: A string representing the drm connector @type.
> - */
> -const char *kmstest_connector_type_str(int type);
> -
> -void kmstest_dump_mode(drmModeModeInfo *mode);
> -
> -int kmstest_get_pipe_from_crtc_id(int fd, int crtc_id);
> -void kmstest_set_vt_graphics_mode(void);
> -void kmstest_restore_vt_mode(void);
> -
>  struct kmstest_connector_config {
>  	drmModeCrtc *crtc;
>  	drmModeConnector *connector;
> @@ -129,25 +111,6 @@ enum kmstest_force_connector_state {
>  	FORCE_CONNECTOR_OFF
>  };
>  
> -bool kmstest_force_connector(int fd, drmModeConnector *connector,
> -			     enum kmstest_force_connector_state state);
> -void kmstest_edid_add_3d(const unsigned char *edid, size_t length, unsigned char *new_edid_ptr[], size_t *new_length);
> -void kmstest_force_edid(int drm_fd, drmModeConnector *connector,
> -			const unsigned char *edid, size_t length);
> -
> -bool kmstest_get_connector_default_mode(int drm_fd, drmModeConnector *connector,
> -					drmModeModeInfo *mode);
> -bool kmstest_get_connector_config(int drm_fd, uint32_t connector_id,
> -				  unsigned long crtc_idx_mask,
> -				  struct kmstest_connector_config *config);
> -void kmstest_free_connector_config(struct kmstest_connector_config *config);
> -
> -void kmstest_set_connector_dpms(int fd, drmModeConnector *connector, int mode);
> -bool kmstest_get_property(int drm_fd, uint32_t object_id, uint32_t object_type,
> -			  const char *name, uint32_t *prop_id, uint64_t *value,
> -			  drmModePropertyPtr *prop);
> -void kmstest_unset_all_crtcs(int drm_fd, drmModeResPtr resources);
> -
>  /*
>   * A small modeset API
>   */
> @@ -160,8 +123,8 @@ enum igt_commit_style {
>  };
>  
>  typedef struct igt_display igt_display_t;
> -typedef struct igt_pipe igt_pipe_t;
>  typedef uint32_t igt_fixed_t;			/* 16.16 fixed point */
> +typedef struct igt_pipe igt_pipe_t;
>  
>  typedef enum {
>  	/* this maps to the kernel API */
> @@ -237,17 +200,300 @@ struct igt_display {
>  	bool has_universal_planes;
>  };
>  
> +/* Low-level helpers with kmstest_ prefix */
> +
> +/**
> + * kmstest_port_name:
> + * @port: display plane
> + *
> + * Returns: String representing @port, e.g. "A".
> + */
> +#define kmstest_port_name(port) ((port) + 'A')
> +
> +/**
> + * kmstest_pipe_name:
> + * @pipe: display pipe
> + *
> + * Returns: String represnting @pipe, e.g. "A".
> + */
> +const char *kmstest_pipe_name(enum pipe pipe);
> +
> +/**
> + * kmstest_plane_name:
> + * @plane: display plane
> + *
> + * Returns: String represnting @pipe, e.g. "plane1".
> + */
> +const char *kmstest_plane_name(enum igt_plane plane);
> +
> +
> +/**
> + * kmstest_encoder_type_str:
> + * @type: DRM_MODE_ENCODER_* enumeration value
> + *
> + * Returns: A string representing the drm encoder @type.
> + */
> +const char *kmstest_encoder_type_str(int type);
> +
> +/**
> + * kmstest_connector_status_str:
> + * @status: DRM_MODE_* connector status value
> + *
> + * Returns: A string representing the drm connector status @status.
> + */
> +const char *kmstest_connector_status_str(int status);
> +
> +/**
> + * kmstest_connector_type_str:
> + * @type: DRM_MODE_CONNECTOR_* enumeration value
> + *
> + * Returns: A string representing the drm connector @type.
> + */
> +const char *kmstest_connector_type_str(int type);
> +
> +/**
> + * kmstest_dump_mode:
> + * @mode: libdrm mode structure
> + *
> + * Prints @mode to stdout in a huma-readable form.
> + */
> +void kmstest_dump_mode(drmModeModeInfo *mode);
> +
> +/**
> + * kmstest_get_pipe_from_crtc_id:
> + * @fd: DRM fd
> + * @crtc_id: DRM CRTC id
> + *
> + * Returns: The pipe number for the given DRM CRTC @crtc_id. This maps directly
> + * to an enum pipe value used in other helper functions.
> + */
> +int kmstest_get_pipe_from_crtc_id(int fd, int crtc_id);
> +
> +/**
> + * kmstest_set_vt_graphics_mode:
> + *
> + * Sets the controlling VT (if available) into graphics/raw mode and installs
> + * an igt exit handler to set the VT back to text mode on exit. Use
> + * #kmstest_restore_vt_mode to restore the previous VT mode manually.
> + *
> + * All kms tests must call this function to make sure that the fbcon doesn't
> + * interfere by e.g. blanking the screen.
> + */
> +void kmstest_set_vt_graphics_mode(void);
> +
> +/**
> + * kmstest_restore_vt_mode:
> + *
> + * Restore the VT mode in use before #kmstest_set_vt_graphics_mode was called.
> + */
> +void kmstest_restore_vt_mode(void);
> +
> +/**
> + * kmstest_force_connector:
> + * @fd: drm file descriptor
> + * @connector: connector
> + * @state: state to force on @connector
> + *
> + * Force the specified state on the specified connector.
> + *
> + * Returns: true on success
> + */
> +bool kmstest_force_connector(int fd, drmModeConnector *connector,
> +			     enum kmstest_force_connector_state state);
> +
> +/**
> + * kmstest_edid_add_3d:
> + * @edid: an existing valid edid block
> + * @length: length of @edid
> + * @new_edid_ptr: pointer to where the new edid will be placed
> + * @new_length: pointer to the size of the new edid
> + *
> + * Makes a copy of an existing edid block and adds an extension indicating
> + * stereo 3D capabilities.
> + */
> +void kmstest_edid_add_3d(const unsigned char *edid, size_t length,
> +			 unsigned char *new_edid_ptr[], size_t *new_length);
> +
> +/**
> + * kmstest_force_edid:
> + * @drm_fd: drm file descriptor
> + * @connector: connector to set @edid on
> + * @edid: An EDID data block
> + * @length: length of the EDID data. #EDID_LENGTH defines the standard EDID
> + * length
> + *
> + * Set the EDID data on @connector to @edid. See also #igt_kms_get_base_edid.
> + *
> + * If @length is zero, the forced EDID will be removed.
> + */
> +void kmstest_force_edid(int drm_fd, drmModeConnector *connector,
> +			const unsigned char *edid, size_t length);
> +
> +/**
> + * kmstest_get_connector_default_mode:
> + * @drm_fd: DRM fd
> + * @connector: libdrm connector
> + * @mode: libdrm mode
> + *
> + * Retrieves the default mode for @connector and stores it in @mode.
> + *
> + * Returns: true on success, false on failure
> + */
> +bool kmstest_get_connector_default_mode(int drm_fd, drmModeConnector *connector,
> +					drmModeModeInfo *mode);
> +
> +/**
> + * kmstest_get_connector_config:
> + * @drm_fd: DRM fd
> + * @connector_id: DRM connector id
> + * @crtc_idx_mask: mask of allowed DRM CRTC indices
> + * @config: structure filled with the possible configuration
> + *
> + * This tries to find a suitable configuration for the given connector and CRTC
> + * constraint and fills it into @config.
> + */
> +bool kmstest_get_connector_config(int drm_fd, uint32_t connector_id,
> +				  unsigned long crtc_idx_mask,
> +				  struct kmstest_connector_config *config);
> +
> +/**
> + * kmstest_free_connector_config:
> + * @config: connector configuration structure
> + *
> + * Free any resources in @config allocated in kmstest_get_connector_config().
> + */
> +void kmstest_free_connector_config(struct kmstest_connector_config *config);
> +
> +/**
> + * kmstest_set_connector_dpms:
> + * @fd: DRM fd
> + * @connector: libdrm connector
> + * @mode: DRM DPMS value
> + *
> + * This function sets the DPMS setting of @connector to @mode.
> + */
> +void kmstest_set_connector_dpms(int fd, drmModeConnector *connector, int mode);
> +
> +/**
> + * kmstest_get_property:
> + * @drm_fd: drm file descriptor
> + * @object_id: object whose properties we're going to get
> + * @object_type: type of obj_id (DRM_MODE_OBJECT_*)
> + * @name: name of the property we're going to get
> + * @prop_id: if not NULL, returns the property id
> + * @value: if not NULL, returns the property value
> + * @prop: if not NULL, returns the property, and the caller will have to free
> + *        it manually.
> + *
> + * Finds a property with the given name on the given object.
> + *
> + * Returns: true in case we found something.
> + */
> +bool kmstest_get_property(int drm_fd, uint32_t object_id, uint32_t object_type,
> +			  const char *name, uint32_t *prop_id, uint64_t *value,
> +			  drmModePropertyPtr *prop);
> +
> +/**
> + * kmstest_unset_all_crtcs:
> + * @drm_fd: the DRM fd
> + * @resources: libdrm resources pointer
> + *
> + * Disables all the screens.
> + */
> +void kmstest_unset_all_crtcs(int drm_fd, drmModeResPtr resources);
> +
> +
> +/**
> + * igt_display_init:
> + * @display: a pointer to an #igt_display_t structure
> + * @drm_fd: a drm file descriptor
> + *
> + * Initialize @display and allocate the various resources required. Use
> + * #igt_display_fini to release the resources when they are no longer required.
> + *
> + */
>  void igt_display_init(igt_display_t *display, int drm_fd);
> +
> +/**
> + * igt_display_fini:
> + * @display: a pointer to an #igt_display_t structure
> + *
> + * Release any resources associated with @display. This does not free @display
> + * itself.
> + */
>  void igt_display_fini(igt_display_t *display);
> -int  igt_display_commit2(igt_display_t *display, enum igt_commit_style s);
> -int  igt_display_commit(igt_display_t *display);
> -int  igt_display_try_commit2(igt_display_t *display, enum igt_commit_style s);
> -int  igt_display_get_n_pipes(igt_display_t *display);
> +
> +/**
> + * igt_display_commit2:
> + * @display: DRM device handle
> + * @s: Commit style
> + *
> + * Commits framebuffer and positioning changes to all planes of each display
> + * pipe, using a specific API to perform the programming.  This function should
> + * be used to exercise a specific driver programming API; igt_display_commit
> + * should be used instead if the API used is unimportant to the test being run.
> + *
> + * This function should only be used to commit changes that are expected to
> + * succeed, since any failure during the commit process will cause the IGT
> + * subtest to fail.  To commit changes that are expected to fail, use
> + * @igt_try_display_commit2 instead.
> + *
> + * Returns: 0 upon success.  This function will never return upon failure
> + * since igt_fail() at lower levels will longjmp out of it.
> + */
> +int igt_display_commit2(igt_display_t *display, enum igt_commit_style s);
> +
> +/**
> + * igt_display_commit:
> + * @display: DRM device handle
> + *
> + * Commits framebuffer and positioning changes to all planes of each display
> + * pipe.
> + *
> + * Returns: 0 upon success.  This function will never return upon failure
> + * since igt_fail() at lower levels will longjmp out of it.
> + */
> +int igt_display_commit(igt_display_t *display);
> +
> +/**
> + * igt_display_try_commit2:
> + * @display: DRM device handle
> + * @s: Commit style
> + *
> + * Attempts to commit framebuffer and positioning changes to all planes of each
> + * display pipe.  This function should be used to commit changes that are
> + * expected to fail, so that the error code can be checked for correctness.
> + * For changes that are expected to succeed, use @igt_display_commit instead.
> + *
> + * Note that in non-atomic commit styles, no display programming will be
> + * performed after the first failure is encountered, so only some of the
> + * operations requested by a test may have been completed.  Tests that catch
> + * errors returned by this function should take care to restore the display to
> + * a sane state after a failure is detected.
> + *
> + * Returns: 0 upon success, otherwise the error code of the first error
> + * encountered.
> + */
> +int igt_display_try_commit2(igt_display_t *display, enum igt_commit_style s);
> +
> +int igt_display_get_n_pipes(igt_display_t *display);
>  
>  const char *igt_output_name(igt_output_t *output);
>  drmModeModeInfo *igt_output_get_mode(igt_output_t *output);
> +
> +/**
> + * igt_output_override_mode:
> + * @output: Output of which the mode will be overridden
> + * @mode: New mode
> + *
> + * Overrides the output's mode with @mode, so that it is used instead of the
> + * mode obtained with get connectors. Note that the mode is used without
> + * checking if the output supports it, so this might lead to unexpected results.
> + */
>  void igt_output_override_mode(igt_output_t *output, drmModeModeInfo *mode);
> +
>  void igt_output_set_pipe(igt_output_t *output, enum pipe pipe);
> +
>  igt_plane_t *igt_output_get_plane(igt_output_t *output, enum igt_plane plane);
>  
>  static inline bool igt_plane_supports_rotation(igt_plane_t *plane)
> @@ -256,15 +502,61 @@ static inline bool igt_plane_supports_rotation(igt_plane_t *plane)
>  }
>  
>  void igt_plane_set_fb(igt_plane_t *plane, struct igt_fb *fb);
> +
>  void igt_plane_set_position(igt_plane_t *plane, int x, int y);
> +
> +/**
> + * igt_plane_set_size:
> + * @plane: plane pointer for which size to be set
> + * @w: width
> + * @h: height
> + *
> + * This function sets width and height for requested plane.
> + * New size will be committed at plane commit time via
> + * drmModeSetPlane().
> + */
>  void igt_plane_set_size(igt_plane_t *plane, int w, int h);
> +
>  void igt_plane_set_panning(igt_plane_t *plane, int x, int y);
> +
>  void igt_plane_set_rotation(igt_plane_t *plane, igt_rotation_t rotation);
> +
> +/**
> + * igt_crtc_set_background:
> + * @pipe: pipe pointer to which background color to be set
> + * @background: background color value in BGR 16bpc
> + *
> + * Sets background color for requested pipe. Color value provided here
> + * will be actually submitted at output commit time via "background_color"
> + * property.
> + * For example to get red as background, set background = 0x00000000FFFF.
> + */
>  void igt_crtc_set_background(igt_pipe_t *pipe, uint64_t background);
> -void igt_fb_set_position(struct igt_fb *fb, igt_plane_t *plane,
> -	uint32_t x, uint32_t y);
> -void igt_fb_set_size(struct igt_fb *fb, igt_plane_t *plane,
> -	uint32_t w, uint32_t h);
> +
> +/**
> + * igt_fb_set_position:
> + * @fb: framebuffer pointer
> + * @plane: plane
> + * @x: X position
> + * @y: Y position
> + *
> + * This function sets position for requested framebuffer as src to plane.
> + * New position will be committed at plane commit time via drmModeSetPlane().
> + */
> +void igt_fb_set_position(struct igt_fb *fb, igt_plane_t *plane, uint32_t x, uint32_t y);
> +
> +/**
> + * igt_fb_set_size:
> + * @fb: framebuffer pointer
> + * @plane: plane
> + * @w: width
> + * @h: height
> + *
> + * This function sets fetch rect size from requested framebuffer as src
> + * to plane. New size will be committed at plane commit time via
> + * drmModeSetPlane().
> + */
> +void igt_fb_set_size(struct igt_fb *fb, igt_plane_t *plane, uint32_t w, uint32_t h);
>  
>  void igt_wait_for_vblank(int drm_fd, enum pipe pipe);
>  
> @@ -281,12 +573,62 @@ void igt_wait_for_vblank(int drm_fd, enum pipe pipe);
>  
>  #define IGT_FIXED(i,f)	((i) << 16 | (f))
>  
> +/**
> + * igt_enable_connectors:
> + *
> + * Force connectors to be enabled where this is known to work well. Use
> + * #igt_reset_connectors to revert the changes.
> + *
> + * An exit handler is installed to ensure connectors are reset when the test
> + * exits.
> + */
>  void igt_enable_connectors(void);
> +
> +/**
> + * igt_reset_connectors:
> + *
> + * Remove any forced state from the connectors.
> + */
>  void igt_reset_connectors(void);
>  
>  #define EDID_LENGTH 128
> -const unsigned char* igt_kms_get_base_edid(void);
> -const unsigned char* igt_kms_get_alt_edid(void);
> +
> +/**
> + * igt_kms_get_base_edid:
> + *
> + * Get the base edid block, which includes the following modes:
> + *
> + *  - 1920x1080 60Hz
> + *  - 1280x720 60Hz
> + *  - 1024x768 60Hz
> + *  - 800x600 60Hz
> + *  - 640x480 60Hz
> + *
> + * This can be extended with further features using functions such as
> + * #kmstest_edid_add_3d.
> + *
> + * Returns: a basic edid block
> + */
> +const unsigned char *igt_kms_get_base_edid(void);
> +
> +/**
> + * igt_kms_get_alt_edid:
> + *
> + * Get an alternate edid block, which includes the following modes:
> + *
> + *  - 1400x1050 60Hz
> + *  - 1920x1080 60Hz
> + *  - 1280x720 60Hz
> + *  - 1024x768 60Hz
> + *  - 800x600 60Hz
> + *  - 640x480 60Hz
> + *
> + * This can be extended with further features using functions such as
> + * #kmstest_edid_add_3d.
> + *
> + * Returns: an alternate edid block
> + */
> +const unsigned char *igt_kms_get_alt_edid(void);
>  
>  
>  #endif /* __IGT_KMS_H__ */
> -- 
> 2.6.2
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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Re: [PATCH i-g-t 1/3] lib/igt_kms migrate existing documentation to header file.

[Marius Vlad]

[-- Attachment #1.1: Type: text/plain, Size: 41154 bytes --]

Hi,

On Mon, Dec 21, 2015 at 05:09:51PM +0100, Daniel Vetter wrote:
> On Mon, Dec 21, 2015 at 01:07:23PM +0200, Marius Vlad wrote:
> > Signed-off-by: Marius Vlad <marius.c.vlad@intel.com>
> 
> Hm, why that? Given that this is against the usual style in igt this needs
> some justification, not an empty commit message.

I thought that aggregating all the documentation in one place looks much
more cosmetic and easier to go through. Currently it seems rather hectic
and disorganized: defines are documented  followed by some vague text
surrounding some functions -- although not all files exhibit this
behaviour is rather common from I've seen. It was rather easy to add
other missing documentation once I had everything in one file. We can
also add some lines into CONTRIBUTING so people are aware of it.

Secondly, most of the (user-space) libraries include the documentation
in its header file -- hence no (proper) justification for the commit
message.

I for one, I'd like to change all of the lib/* files with this approach.

> 
> Thanks, Daniel
> 
> > ---
> >  lib/igt_kms.c | 321 +-------------------------------------
> >  lib/igt_kms.h | 486 +++++++++++++++++++++++++++++++++++++++++++++++++---------
> >  2 files changed, 418 insertions(+), 389 deletions(-)
> > 
> > diff --git a/lib/igt_kms.c b/lib/igt_kms.c
> > index 5d5a95c..3dc559d 100644
> > --- a/lib/igt_kms.c
> > +++ b/lib/igt_kms.c
> > @@ -88,23 +88,7 @@ static void update_edid_csum(unsigned char *edid)
> >  #define EDID_NAME base_edid
> >  #include "igt_edid_template.h"
> >  
> > -/**
> > - * igt_kms_get_base_edid:
> > - *
> > - * Get the base edid block, which includes the following modes:
> > - *
> > - *  - 1920x1080 60Hz
> > - *  - 1280x720 60Hz
> > - *  - 1024x768 60Hz
> > - *  - 800x600 60Hz
> > - *  - 640x480 60Hz
> > - *
> > - * This can be extended with further features using functions such as
> > - * #kmstest_edid_add_3d.
> > - *
> > - * Returns: a basic edid block
> > - */
> > -const unsigned char* igt_kms_get_base_edid(void)
> > +const unsigned char *igt_kms_get_base_edid(void)
> >  {
> >  	update_edid_csum(base_edid);
> >  
> > @@ -128,59 +112,13 @@ const unsigned char* igt_kms_get_base_edid(void)
> >  #define EDID_NAME alt_edid
> >  #include "igt_edid_template.h"
> >  
> > -/**
> > - * igt_kms_get_alt_edid:
> > - *
> > - * Get an alternate edid block, which includes the following modes:
> > - *
> > - *  - 1400x1050 60Hz
> > - *  - 1920x1080 60Hz
> > - *  - 1280x720 60Hz
> > - *  - 1024x768 60Hz
> > - *  - 800x600 60Hz
> > - *  - 640x480 60Hz
> > - *
> > - * This can be extended with further features using functions such as
> > - * #kmstest_edid_add_3d.
> > - *
> > - * Returns: an alternate edid block
> > - */
> > -const unsigned char* igt_kms_get_alt_edid(void)
> > +const unsigned char *igt_kms_get_alt_edid(void)
> >  {
> >  	update_edid_csum(alt_edid);
> >  
> >  	return alt_edid;
> >  }
> >  
> > -/**
> > - * SECTION:igt_kms
> > - * @short_description: Kernel modesetting support library
> > - * @title: KMS
> > - * @include: igt.h
> > - *
> > - * This library provides support to enumerate and set modeset configurations.
> > - *
> > - * There are two parts in this library: First the low level helper function
> > - * which directly build on top of raw ioctls or the interfaces provided by
> > - * libdrm. Those functions all have a kmstest_ prefix.
> > - *
> > - * The second part is a high-level library to manage modeset configurations
> > - * which abstracts away some of the low-level details like the difference
> > - * between legacy and universal plane support for setting cursors or in the
> > - * future the difference between legacy and atomic commit. These high-level
> > - * functions have all igt_ prefixes. This part is still very much work in
> > - * progress and so also lacks a bit documentation for the individual functions.
> > - *
> > - * Note that this library's header pulls in the [i-g-t framebuffer](intel-gpu-tools-i-g-t-framebuffer.html)
> > - * library as a dependency.
> > - */
> > -
> > -/**
> > - * kmstest_pipe_name:
> > - * @pipe: display pipe
> > - *
> > - * Returns: String represnting @pipe, e.g. "A".
> > - */
> >  const char *kmstest_pipe_name(enum pipe pipe)
> >  {
> >  	const char *str[] = { "A", "B", "C" };
> > @@ -191,12 +129,6 @@ const char *kmstest_pipe_name(enum pipe pipe)
> >  	return str[pipe];
> >  }
> >  
> > -/**
> > - * kmstest_plane_name:
> > - * @plane: display plane
> > - *
> > - * Returns: String represnting @pipe, e.g. "plane1".
> > - */
> >  const char *kmstest_plane_name(enum igt_plane plane)
> >  {
> >  	static const char *names[] = {
> > @@ -235,12 +167,6 @@ static const char *mode_stereo_name(const drmModeModeInfo *mode)
> >  	}
> >  }
> >  
> > -/**
> > - * kmstest_dump_mode:
> > - * @mode: libdrm mode structure
> > - *
> > - * Prints @mode to stdout in a huma-readable form.
> > - */
> >  void kmstest_dump_mode(drmModeModeInfo *mode)
> >  {
> >  	const char *stereo = mode_stereo_name(mode);
> > @@ -256,14 +182,6 @@ void kmstest_dump_mode(drmModeModeInfo *mode)
> >  		 stereo ? stereo : "", stereo ? ")" : "");
> >  }
> >  
> > -/**
> > - * kmstest_get_pipe_from_crtc_id:
> > - * @fd: DRM fd
> > - * @crtc_id: DRM CRTC id
> > - *
> > - * Returns: The pipe number for the given DRM CRTC @crtc_id. This maps directly
> > - * to an enum pipe value used in other helper functions.
> > - */
> >  int kmstest_get_pipe_from_crtc_id(int fd, int crtc_id)
> >  {
> >  	struct drm_i915_get_pipe_from_crtc_id pfci;
> > @@ -317,11 +235,6 @@ err:
> >  
> >  static unsigned long orig_vt_mode = -1UL;
> >  
> > -/**
> > - * kmstest_restore_vt_mode:
> > - *
> > - * Restore the VT mode in use before #kmstest_set_vt_graphics_mode was called.
> > - */
> >  void kmstest_restore_vt_mode(void)
> >  {
> >  	long ret;
> > @@ -335,16 +248,6 @@ void kmstest_restore_vt_mode(void)
> >  	}
> >  }
> >  
> > -/**
> > - * kmstest_set_vt_graphics_mode:
> > - *
> > - * Sets the controlling VT (if available) into graphics/raw mode and installs
> > - * an igt exit handler to set the VT back to text mode on exit. Use
> > - * #kmstest_restore_vt_mode to restore the previous VT mode manually.
> > - *
> > - * All kms tests must call this function to make sure that the fbcon doesn't
> > - * interfere by e.g. blanking the screen.
> > - */
> >  void kmstest_set_vt_graphics_mode(void)
> >  {
> >  	long ret;
> > @@ -367,16 +270,6 @@ static void reset_connectors_at_exit(int sig)
> >  	igt_reset_connectors();
> >  }
> >  
> > -/**
> > - * kmstest_force_connector:
> > - * @fd: drm file descriptor
> > - * @connector: connector
> > - * @state: state to force on @connector
> > - *
> > - * Force the specified state on the specified connector.
> > - *
> > - * Returns: true on success
> > - */
> >  bool kmstest_force_connector(int drm_fd, drmModeConnector *connector,
> >  			     enum kmstest_force_connector_state state)
> >  {
> > @@ -459,18 +352,6 @@ bool kmstest_force_connector(int drm_fd, drmModeConnector *connector,
> >  	return (ret == -1) ? false : true;
> >  }
> >  
> > -/**
> > - * kmstest_force_edid:
> > - * @drm_fd: drm file descriptor
> > - * @connector: connector to set @edid on
> > - * @edid: An EDID data block
> > - * @length: length of the EDID data. #EDID_LENGTH defines the standard EDID
> > - * length
> > - *
> > - * Set the EDID data on @connector to @edid. See also #igt_kms_get_base_edid.
> > - *
> > - * If @length is zero, the forced EDID will be removed.
> > - */
> >  void kmstest_force_edid(int drm_fd, drmModeConnector *connector,
> >  			const unsigned char *edid, size_t length)
> >  {
> > @@ -499,16 +380,6 @@ void kmstest_force_edid(int drm_fd, drmModeConnector *connector,
> >  	igt_assert(ret != -1);
> >  }
> >  
> > -/**
> > - * kmstest_get_connector_default_mode:
> > - * @drm_fd: DRM fd
> > - * @connector: libdrm connector
> > - * @mode: libdrm mode
> > - *
> > - * Retrieves the default mode for @connector and stores it in @mode.
> > - *
> > - * Returns: true on success, false on failure
> > - */
> >  bool kmstest_get_connector_default_mode(int drm_fd, drmModeConnector *connector,
> >  					drmModeModeInfo *mode)
> >  {
> > @@ -532,16 +403,6 @@ bool kmstest_get_connector_default_mode(int drm_fd, drmModeConnector *connector,
> >  	return true;
> >  }
> >  
> > -/**
> > - * kmstest_get_connector_config:
> > - * @drm_fd: DRM fd
> > - * @connector_id: DRM connector id
> > - * @crtc_idx_mask: mask of allowed DRM CRTC indices
> > - * @config: structure filled with the possible configuration
> > - *
> > - * This tries to find a suitable configuration for the given connector and CRTC
> > - * constraint and fills it into @config.
> > - */
> >  bool kmstest_get_connector_config(int drm_fd, uint32_t connector_id,
> >  				  unsigned long crtc_idx_mask,
> >  				  struct kmstest_connector_config *config)
> > @@ -633,12 +494,6 @@ err1:
> >  	return false;
> >  }
> >  
> > -/**
> > - * kmstest_free_connector_config:
> > - * @config: connector configuration structure
> > - *
> > - * Free any resources in @config allocated in kmstest_get_connector_config().
> > - */
> >  void kmstest_free_connector_config(struct kmstest_connector_config *config)
> >  {
> >  	drmModeFreeCrtc(config->crtc);
> > @@ -646,14 +501,6 @@ void kmstest_free_connector_config(struct kmstest_connector_config *config)
> >  	drmModeFreeConnector(config->connector);
> >  }
> >  
> > -/**
> > - * kmstest_set_connector_dpms:
> > - * @fd: DRM fd
> > - * @connector: libdrm connector
> > - * @mode: DRM DPMS value
> > - *
> > - * This function sets the DPMS setting of @connector to @mode.
> > - */
> >  void kmstest_set_connector_dpms(int fd, drmModeConnector *connector, int mode)
> >  {
> >  	int i, dpms = 0;
> > @@ -682,21 +529,6 @@ void kmstest_set_connector_dpms(int fd, drmModeConnector *connector, int mode)
> >  					       dpms, mode) == 0);
> >  }
> >  
> > -/**
> > - * kmstest_get_property:
> > - * @drm_fd: drm file descriptor
> > - * @object_id: object whose properties we're going to get
> > - * @object_type: type of obj_id (DRM_MODE_OBJECT_*)
> > - * @name: name of the property we're going to get
> > - * @prop_id: if not NULL, returns the property id
> > - * @value: if not NULL, returns the property value
> > - * @prop: if not NULL, returns the property, and the caller will have to free
> > - *        it manually.
> > - *
> > - * Finds a property with the given name on the given object.
> > - *
> > - * Returns: true in case we found something.
> > - */
> >  bool
> >  kmstest_get_property(int drm_fd, uint32_t object_id, uint32_t object_type,
> >  		     const char *name, uint32_t *prop_id /* out */,
> > @@ -734,16 +566,6 @@ kmstest_get_property(int drm_fd, uint32_t object_id, uint32_t object_type,
> >  	return found;
> >  }
> >  
> > -/**
> > - * kmstest_edid_add_3d:
> > - * @edid: an existing valid edid block
> > - * @length: length of @edid
> > - * @new_edid_ptr: pointer to where the new edid will be placed
> > - * @new_length: pointer to the size of the new edid
> > - *
> > - * Makes a copy of an existing edid block and adds an extension indicating
> > - * stereo 3D capabilities.
> > - */
> >  void kmstest_edid_add_3d(const unsigned char *edid, size_t length,
> >  			 unsigned char *new_edid_ptr[], size_t *new_length)
> >  {
> > @@ -814,13 +636,6 @@ void kmstest_edid_add_3d(const unsigned char *edid, size_t length,
> >  	new_edid[length + 127] = 256 - sum;
> >  }
> >  
> > -/**
> > - * kmstest_unset_all_crtcs:
> > - * @drm_fd: the DRM fd
> > - * @resources: libdrm resources pointer
> > - *
> > - * Disables all the screens.
> > - */
> >  void kmstest_unset_all_crtcs(int drm_fd, drmModeResPtr resources)
> >  {
> >  	int i, rc;
> > @@ -964,15 +779,6 @@ static int get_drm_plane_type(int drm_fd, uint32_t plane_id)
> >  	return DRM_PLANE_TYPE_OVERLAY;
> >  }
> >  
> > -/**
> > - * igt_display_init:
> > - * @display: a pointer to an #igt_display_t structure
> > - * @drm_fd: a drm file descriptor
> > - *
> > - * Initialize @display and allocate the various resources required. Use
> > - * #igt_display_fini to release the resources when they are no longer required.
> > - *
> > - */
> >  void igt_display_init(igt_display_t *display, int drm_fd)
> >  {
> >  	drmModeRes *resources;
> > @@ -1171,13 +977,6 @@ static void igt_output_fini(igt_output_t *output)
> >  	free(output->name);
> >  }
> >  
> > -/**
> > - * igt_display_fini:
> > - * @display: a pointer to an #igt_display_t structure
> > - *
> > - * Release any resources associated with @display. This does not free @display
> > - * itself.
> > - */
> >  void igt_display_fini(igt_display_t *display)
> >  {
> >  	int i;
> > @@ -1648,24 +1447,6 @@ static int do_display_commit(igt_display_t *display,
> >  	return 0;
> >  }
> >  
> > -/**
> > - * igt_display_commit2:
> > - * @display: DRM device handle
> > - * @s: Commit style
> > - *
> > - * Commits framebuffer and positioning changes to all planes of each display
> > - * pipe, using a specific API to perform the programming.  This function should
> > - * be used to exercise a specific driver programming API; igt_display_commit
> > - * should be used instead if the API used is unimportant to the test being run.
> > - *
> > - * This function should only be used to commit changes that are expected to
> > - * succeed, since any failure during the commit process will cause the IGT
> > - * subtest to fail.  To commit changes that are expected to fail, use
> > - * @igt_try_display_commit2 instead.
> > - *
> > - * Returns: 0 upon success.  This function will never return upon failure
> > - * since igt_fail() at lower levels will longjmp out of it.
> > - */
> >  int igt_display_commit2(igt_display_t *display,
> >  		       enum igt_commit_style s)
> >  {
> > @@ -1674,40 +1455,11 @@ int igt_display_commit2(igt_display_t *display,
> >  	return 0;
> >  }
> >  
> > -/**
> > - * igt_display_try_commit2:
> > - * @display: DRM device handle
> > - * @s: Commit style
> > - *
> > - * Attempts to commit framebuffer and positioning changes to all planes of each
> > - * display pipe.  This function should be used to commit changes that are
> > - * expected to fail, so that the error code can be checked for correctness.
> > - * For changes that are expected to succeed, use @igt_display_commit instead.
> > - *
> > - * Note that in non-atomic commit styles, no display programming will be
> > - * performed after the first failure is encountered, so only some of the
> > - * operations requested by a test may have been completed.  Tests that catch
> > - * errors returned by this function should take care to restore the display to
> > - * a sane state after a failure is detected.
> > - *
> > - * Returns: 0 upon success, otherwise the error code of the first error
> > - * encountered.
> > - */
> >  int igt_display_try_commit2(igt_display_t *display, enum igt_commit_style s)
> >  {
> >  	return do_display_commit(display, s, false);
> >  }
> >  
> > -/**
> > - * igt_display_commit:
> > - * @display: DRM device handle
> > - *
> > - * Commits framebuffer and positioning changes to all planes of each display
> > - * pipe.
> > - *
> > - * Returns: 0 upon success.  This function will never return upon failure
> > - * since igt_fail() at lower levels will longjmp out of it.
> > - */
> >  int igt_display_commit(igt_display_t *display)
> >  {
> >  	return igt_display_commit2(display, COMMIT_LEGACY);
> > @@ -1723,15 +1475,6 @@ drmModeModeInfo *igt_output_get_mode(igt_output_t *output)
> >  	return &output->config.default_mode;
> >  }
> >  
> > -/**
> > - * igt_output_override_mode:
> > - * @output: Output of which the mode will be overridden
> > - * @mode: New mode
> > - *
> > - * Overrides the output's mode with @mode, so that it is used instead of the
> > - * mode obtained with get connectors. Note that the mode is used without
> > - * checking if the output supports it, so this might lead to unexpected results.
> > - */
> >  void igt_output_override_mode(igt_output_t *output, drmModeModeInfo *mode)
> >  {
> >  	output->override_mode = *mode;
> > @@ -1803,16 +1546,6 @@ void igt_plane_set_position(igt_plane_t *plane, int x, int y)
> >  	plane->position_changed = true;
> >  }
> >  
> > -/**
> > - * igt_plane_set_size:
> > - * @plane: plane pointer for which size to be set
> > - * @w: width
> > - * @h: height
> > - *
> > - * This function sets width and height for requested plane.
> > - * New size will be committed at plane commit time via
> > - * drmModeSetPlane().
> > - */
> >  void igt_plane_set_size(igt_plane_t *plane, int w, int h)
> >  {
> >  	igt_pipe_t *pipe = plane->pipe;
> > @@ -1827,16 +1560,6 @@ void igt_plane_set_size(igt_plane_t *plane, int w, int h)
> >  	plane->size_changed = true;
> >  }
> >  
> > -/**
> > - * igt_fb_set_position:
> > - * @fb: framebuffer pointer
> > - * @plane: plane
> > - * @x: X position
> > - * @y: Y position
> > - *
> > - * This function sets position for requested framebuffer as src to plane.
> > - * New position will be committed at plane commit time via drmModeSetPlane().
> > - */
> >  void igt_fb_set_position(struct igt_fb *fb, igt_plane_t *plane,
> >  	uint32_t x, uint32_t y)
> >  {
> > @@ -1852,17 +1575,6 @@ void igt_fb_set_position(struct igt_fb *fb, igt_plane_t *plane,
> >  	plane->fb_changed = true;
> >  }
> >  
> > -/**
> > - * igt_fb_set_size:
> > - * @fb: framebuffer pointer
> > - * @plane: plane
> > - * @w: width
> > - * @h: height
> > - *
> > - * This function sets fetch rect size from requested framebuffer as src
> > - * to plane. New size will be committed at plane commit time via
> > - * drmModeSetPlane().
> > - */
> >  void igt_fb_set_size(struct igt_fb *fb, igt_plane_t *plane,
> >  	uint32_t w, uint32_t h)
> >  {
> > @@ -1923,16 +1635,6 @@ void igt_plane_set_rotation(igt_plane_t *plane, igt_rotation_t rotation)
> >  	plane->rotation_changed = true;
> >  }
> >  
> > -/**
> > - * igt_crtc_set_background:
> > - * @pipe: pipe pointer to which background color to be set
> > - * @background: background color value in BGR 16bpc
> > - *
> > - * Sets background color for requested pipe. Color value provided here
> > - * will be actually submitted at output commit time via "background_color"
> > - * property.
> > - * For example to get red as background, set background = 0x00000000FFFF.
> > - */
> >  void igt_crtc_set_background(igt_pipe_t *pipe, uint64_t background)
> >  {
> >  	igt_display_t *display = pipe->display;
> > @@ -1946,7 +1648,6 @@ void igt_crtc_set_background(igt_pipe_t *pipe, uint64_t background)
> >  	pipe->background_changed = true;
> >  }
> >  
> > -
> >  void igt_wait_for_vblank(int drm_fd, enum pipe pipe)
> >  {
> >  	drmVBlank wait_vbl;
> > @@ -1960,15 +1661,6 @@ void igt_wait_for_vblank(int drm_fd, enum pipe pipe)
> >  	igt_assert(drmWaitVBlank(drm_fd, &wait_vbl) == 0);
> >  }
> >  
> > -/**
> > - * igt_enable_connectors:
> > - *
> > - * Force connectors to be enabled where this is known to work well. Use
> > - * #igt_reset_connectors to revert the changes.
> > - *
> > - * An exit handler is installed to ensure connectors are reset when the test
> > - * exits.
> > - */
> >  void igt_enable_connectors(void)
> >  {
> >  	drmModeRes *res;
> > @@ -1983,8 +1675,8 @@ void igt_enable_connectors(void)
> >  
> >  		c = drmModeGetConnectorCurrent(drm_fd, res->connectors[i]);
> >  
> > -		/* don't attempt to force connectors that are already connected
> > -		 */
> > +		/* don't attempt to force connectors that
> > +		 * are already connected */
> >  		if (c->connection == DRM_MODE_CONNECTED)
> >  			continue;
> >  
> > @@ -2001,11 +1693,6 @@ void igt_enable_connectors(void)
> >  	close(drm_fd);
> >  }
> >  
> > -/**
> > - * igt_reset_connectors:
> > - *
> > - * Remove any forced state from the connectors.
> > - */
> >  void igt_reset_connectors(void)
> >  {
> >  	char **tmp;
> > diff --git a/lib/igt_kms.h b/lib/igt_kms.h
> > index 94f315f..2cc8a3b 100644
> > --- a/lib/igt_kms.h
> > +++ b/lib/igt_kms.h
> > @@ -25,6 +25,30 @@
> >   * 	Damien Lespiau <damien.lespiau@intel.com>
> >   */
> >  
> > +/**
> > + * SECTION:igt_kms
> > + * @short_description: Kernel modesetting support library
> > + * @title: KMS
> > + * @include: igt.h
> > + *
> > + * This library provides support to enumerate and set modeset configurations.
> > + *
> > + * There are two parts in this library: First the low level helper function
> > + * which directly build on top of raw ioctls or the interfaces provided by
> > + * libdrm. Those functions all have a kmstest_ prefix.
> > + *
> > + * The second part is a high-level library to manage modeset configurations
> > + * which abstracts away some of the low-level details like the difference
> > + * between legacy and universal plane support for setting cursors or in the
> > + * future the difference between legacy and atomic commit. These high-level
> > + * functions have all igt_ prefixes. This part is still very much work in
> > + * progress and so also lacks a bit documentation for the individual functions.
> > + *
> > + * Note that this library's header pulls in the [i-g-t
> > + * framebuffer](intel-gpu-tools-Framebuffer.html) library as a
> > + * dependency.
> > + */
> > +
> >  #ifndef __IGT_KMS_H__
> >  #define __IGT_KMS_H__
> >  
> > @@ -37,7 +61,6 @@
> >  #include "igt_fb.h"
> >  #include "ioctl_wrappers.h"
> >  
> > -/* Low-level helpers with kmstest_ prefix */
> >  
> >  enum pipe {
> >          PIPE_ANY = -1,
> > @@ -46,7 +69,6 @@ enum pipe {
> >          PIPE_C,
> >          I915_MAX_PIPES
> >  };
> > -const char *kmstest_pipe_name(enum pipe pipe);
> >  
> >  /* We namespace this enum to not conflict with the Android i915_drm.h */
> >  enum igt_plane {
> > @@ -57,8 +79,6 @@ enum igt_plane {
> >          IGT_PLANE_CURSOR,
> >  };
> >  
> > -const char *kmstest_plane_name(enum igt_plane plane);
> > -
> >  enum port {
> >          PORT_A = 0,
> >          PORT_B,
> > @@ -68,44 +88,6 @@ enum port {
> >          I915_MAX_PORTS
> >  };
> >  
> > -/**
> > - * kmstest_port_name:
> > - * @port: display plane
> > - *
> > - * Returns: String representing @port, e.g. "A".
> > - */
> > -#define kmstest_port_name(port) ((port) + 'A')
> > -
> > -/**
> > - * kmstest_encoder_type_str:
> > - * @type: DRM_MODE_ENCODER_* enumeration value
> > - *
> > - * Returns: A string representing the drm encoder @type.
> > - */
> > -const char *kmstest_encoder_type_str(int type);
> > -
> > -/**
> > - * kmstest_connector_status_str:
> > - * @status: DRM_MODE_* connector status value
> > - *
> > - * Returns: A string representing the drm connector status @status.
> > - */
> > -const char *kmstest_connector_status_str(int status);
> > -
> > -/**
> > - * kmstest_connector_type_str:
> > - * @type: DRM_MODE_CONNECTOR_* enumeration value
> > - *
> > - * Returns: A string representing the drm connector @type.
> > - */
> > -const char *kmstest_connector_type_str(int type);
> > -
> > -void kmstest_dump_mode(drmModeModeInfo *mode);
> > -
> > -int kmstest_get_pipe_from_crtc_id(int fd, int crtc_id);
> > -void kmstest_set_vt_graphics_mode(void);
> > -void kmstest_restore_vt_mode(void);
> > -
> >  struct kmstest_connector_config {
> >  	drmModeCrtc *crtc;
> >  	drmModeConnector *connector;
> > @@ -129,25 +111,6 @@ enum kmstest_force_connector_state {
> >  	FORCE_CONNECTOR_OFF
> >  };
> >  
> > -bool kmstest_force_connector(int fd, drmModeConnector *connector,
> > -			     enum kmstest_force_connector_state state);
> > -void kmstest_edid_add_3d(const unsigned char *edid, size_t length, unsigned char *new_edid_ptr[], size_t *new_length);
> > -void kmstest_force_edid(int drm_fd, drmModeConnector *connector,
> > -			const unsigned char *edid, size_t length);
> > -
> > -bool kmstest_get_connector_default_mode(int drm_fd, drmModeConnector *connector,
> > -					drmModeModeInfo *mode);
> > -bool kmstest_get_connector_config(int drm_fd, uint32_t connector_id,
> > -				  unsigned long crtc_idx_mask,
> > -				  struct kmstest_connector_config *config);
> > -void kmstest_free_connector_config(struct kmstest_connector_config *config);
> > -
> > -void kmstest_set_connector_dpms(int fd, drmModeConnector *connector, int mode);
> > -bool kmstest_get_property(int drm_fd, uint32_t object_id, uint32_t object_type,
> > -			  const char *name, uint32_t *prop_id, uint64_t *value,
> > -			  drmModePropertyPtr *prop);
> > -void kmstest_unset_all_crtcs(int drm_fd, drmModeResPtr resources);
> > -
> >  /*
> >   * A small modeset API
> >   */
> > @@ -160,8 +123,8 @@ enum igt_commit_style {
> >  };
> >  
> >  typedef struct igt_display igt_display_t;
> > -typedef struct igt_pipe igt_pipe_t;
> >  typedef uint32_t igt_fixed_t;			/* 16.16 fixed point */
> > +typedef struct igt_pipe igt_pipe_t;
> >  
> >  typedef enum {
> >  	/* this maps to the kernel API */
> > @@ -237,17 +200,300 @@ struct igt_display {
> >  	bool has_universal_planes;
> >  };
> >  
> > +/* Low-level helpers with kmstest_ prefix */
> > +
> > +/**
> > + * kmstest_port_name:
> > + * @port: display plane
> > + *
> > + * Returns: String representing @port, e.g. "A".
> > + */
> > +#define kmstest_port_name(port) ((port) + 'A')
> > +
> > +/**
> > + * kmstest_pipe_name:
> > + * @pipe: display pipe
> > + *
> > + * Returns: String represnting @pipe, e.g. "A".
> > + */
> > +const char *kmstest_pipe_name(enum pipe pipe);
> > +
> > +/**
> > + * kmstest_plane_name:
> > + * @plane: display plane
> > + *
> > + * Returns: String represnting @pipe, e.g. "plane1".
> > + */
> > +const char *kmstest_plane_name(enum igt_plane plane);
> > +
> > +
> > +/**
> > + * kmstest_encoder_type_str:
> > + * @type: DRM_MODE_ENCODER_* enumeration value
> > + *
> > + * Returns: A string representing the drm encoder @type.
> > + */
> > +const char *kmstest_encoder_type_str(int type);
> > +
> > +/**
> > + * kmstest_connector_status_str:
> > + * @status: DRM_MODE_* connector status value
> > + *
> > + * Returns: A string representing the drm connector status @status.
> > + */
> > +const char *kmstest_connector_status_str(int status);
> > +
> > +/**
> > + * kmstest_connector_type_str:
> > + * @type: DRM_MODE_CONNECTOR_* enumeration value
> > + *
> > + * Returns: A string representing the drm connector @type.
> > + */
> > +const char *kmstest_connector_type_str(int type);
> > +
> > +/**
> > + * kmstest_dump_mode:
> > + * @mode: libdrm mode structure
> > + *
> > + * Prints @mode to stdout in a huma-readable form.
> > + */
> > +void kmstest_dump_mode(drmModeModeInfo *mode);
> > +
> > +/**
> > + * kmstest_get_pipe_from_crtc_id:
> > + * @fd: DRM fd
> > + * @crtc_id: DRM CRTC id
> > + *
> > + * Returns: The pipe number for the given DRM CRTC @crtc_id. This maps directly
> > + * to an enum pipe value used in other helper functions.
> > + */
> > +int kmstest_get_pipe_from_crtc_id(int fd, int crtc_id);
> > +
> > +/**
> > + * kmstest_set_vt_graphics_mode:
> > + *
> > + * Sets the controlling VT (if available) into graphics/raw mode and installs
> > + * an igt exit handler to set the VT back to text mode on exit. Use
> > + * #kmstest_restore_vt_mode to restore the previous VT mode manually.
> > + *
> > + * All kms tests must call this function to make sure that the fbcon doesn't
> > + * interfere by e.g. blanking the screen.
> > + */
> > +void kmstest_set_vt_graphics_mode(void);
> > +
> > +/**
> > + * kmstest_restore_vt_mode:
> > + *
> > + * Restore the VT mode in use before #kmstest_set_vt_graphics_mode was called.
> > + */
> > +void kmstest_restore_vt_mode(void);
> > +
> > +/**
> > + * kmstest_force_connector:
> > + * @fd: drm file descriptor
> > + * @connector: connector
> > + * @state: state to force on @connector
> > + *
> > + * Force the specified state on the specified connector.
> > + *
> > + * Returns: true on success
> > + */
> > +bool kmstest_force_connector(int fd, drmModeConnector *connector,
> > +			     enum kmstest_force_connector_state state);
> > +
> > +/**
> > + * kmstest_edid_add_3d:
> > + * @edid: an existing valid edid block
> > + * @length: length of @edid
> > + * @new_edid_ptr: pointer to where the new edid will be placed
> > + * @new_length: pointer to the size of the new edid
> > + *
> > + * Makes a copy of an existing edid block and adds an extension indicating
> > + * stereo 3D capabilities.
> > + */
> > +void kmstest_edid_add_3d(const unsigned char *edid, size_t length,
> > +			 unsigned char *new_edid_ptr[], size_t *new_length);
> > +
> > +/**
> > + * kmstest_force_edid:
> > + * @drm_fd: drm file descriptor
> > + * @connector: connector to set @edid on
> > + * @edid: An EDID data block
> > + * @length: length of the EDID data. #EDID_LENGTH defines the standard EDID
> > + * length
> > + *
> > + * Set the EDID data on @connector to @edid. See also #igt_kms_get_base_edid.
> > + *
> > + * If @length is zero, the forced EDID will be removed.
> > + */
> > +void kmstest_force_edid(int drm_fd, drmModeConnector *connector,
> > +			const unsigned char *edid, size_t length);
> > +
> > +/**
> > + * kmstest_get_connector_default_mode:
> > + * @drm_fd: DRM fd
> > + * @connector: libdrm connector
> > + * @mode: libdrm mode
> > + *
> > + * Retrieves the default mode for @connector and stores it in @mode.
> > + *
> > + * Returns: true on success, false on failure
> > + */
> > +bool kmstest_get_connector_default_mode(int drm_fd, drmModeConnector *connector,
> > +					drmModeModeInfo *mode);
> > +
> > +/**
> > + * kmstest_get_connector_config:
> > + * @drm_fd: DRM fd
> > + * @connector_id: DRM connector id
> > + * @crtc_idx_mask: mask of allowed DRM CRTC indices
> > + * @config: structure filled with the possible configuration
> > + *
> > + * This tries to find a suitable configuration for the given connector and CRTC
> > + * constraint and fills it into @config.
> > + */
> > +bool kmstest_get_connector_config(int drm_fd, uint32_t connector_id,
> > +				  unsigned long crtc_idx_mask,
> > +				  struct kmstest_connector_config *config);
> > +
> > +/**
> > + * kmstest_free_connector_config:
> > + * @config: connector configuration structure
> > + *
> > + * Free any resources in @config allocated in kmstest_get_connector_config().
> > + */
> > +void kmstest_free_connector_config(struct kmstest_connector_config *config);
> > +
> > +/**
> > + * kmstest_set_connector_dpms:
> > + * @fd: DRM fd
> > + * @connector: libdrm connector
> > + * @mode: DRM DPMS value
> > + *
> > + * This function sets the DPMS setting of @connector to @mode.
> > + */
> > +void kmstest_set_connector_dpms(int fd, drmModeConnector *connector, int mode);
> > +
> > +/**
> > + * kmstest_get_property:
> > + * @drm_fd: drm file descriptor
> > + * @object_id: object whose properties we're going to get
> > + * @object_type: type of obj_id (DRM_MODE_OBJECT_*)
> > + * @name: name of the property we're going to get
> > + * @prop_id: if not NULL, returns the property id
> > + * @value: if not NULL, returns the property value
> > + * @prop: if not NULL, returns the property, and the caller will have to free
> > + *        it manually.
> > + *
> > + * Finds a property with the given name on the given object.
> > + *
> > + * Returns: true in case we found something.
> > + */
> > +bool kmstest_get_property(int drm_fd, uint32_t object_id, uint32_t object_type,
> > +			  const char *name, uint32_t *prop_id, uint64_t *value,
> > +			  drmModePropertyPtr *prop);
> > +
> > +/**
> > + * kmstest_unset_all_crtcs:
> > + * @drm_fd: the DRM fd
> > + * @resources: libdrm resources pointer
> > + *
> > + * Disables all the screens.
> > + */
> > +void kmstest_unset_all_crtcs(int drm_fd, drmModeResPtr resources);
> > +
> > +
> > +/**
> > + * igt_display_init:
> > + * @display: a pointer to an #igt_display_t structure
> > + * @drm_fd: a drm file descriptor
> > + *
> > + * Initialize @display and allocate the various resources required. Use
> > + * #igt_display_fini to release the resources when they are no longer required.
> > + *
> > + */
> >  void igt_display_init(igt_display_t *display, int drm_fd);
> > +
> > +/**
> > + * igt_display_fini:
> > + * @display: a pointer to an #igt_display_t structure
> > + *
> > + * Release any resources associated with @display. This does not free @display
> > + * itself.
> > + */
> >  void igt_display_fini(igt_display_t *display);
> > -int  igt_display_commit2(igt_display_t *display, enum igt_commit_style s);
> > -int  igt_display_commit(igt_display_t *display);
> > -int  igt_display_try_commit2(igt_display_t *display, enum igt_commit_style s);
> > -int  igt_display_get_n_pipes(igt_display_t *display);
> > +
> > +/**
> > + * igt_display_commit2:
> > + * @display: DRM device handle
> > + * @s: Commit style
> > + *
> > + * Commits framebuffer and positioning changes to all planes of each display
> > + * pipe, using a specific API to perform the programming.  This function should
> > + * be used to exercise a specific driver programming API; igt_display_commit
> > + * should be used instead if the API used is unimportant to the test being run.
> > + *
> > + * This function should only be used to commit changes that are expected to
> > + * succeed, since any failure during the commit process will cause the IGT
> > + * subtest to fail.  To commit changes that are expected to fail, use
> > + * @igt_try_display_commit2 instead.
> > + *
> > + * Returns: 0 upon success.  This function will never return upon failure
> > + * since igt_fail() at lower levels will longjmp out of it.
> > + */
> > +int igt_display_commit2(igt_display_t *display, enum igt_commit_style s);
> > +
> > +/**
> > + * igt_display_commit:
> > + * @display: DRM device handle
> > + *
> > + * Commits framebuffer and positioning changes to all planes of each display
> > + * pipe.
> > + *
> > + * Returns: 0 upon success.  This function will never return upon failure
> > + * since igt_fail() at lower levels will longjmp out of it.
> > + */
> > +int igt_display_commit(igt_display_t *display);
> > +
> > +/**
> > + * igt_display_try_commit2:
> > + * @display: DRM device handle
> > + * @s: Commit style
> > + *
> > + * Attempts to commit framebuffer and positioning changes to all planes of each
> > + * display pipe.  This function should be used to commit changes that are
> > + * expected to fail, so that the error code can be checked for correctness.
> > + * For changes that are expected to succeed, use @igt_display_commit instead.
> > + *
> > + * Note that in non-atomic commit styles, no display programming will be
> > + * performed after the first failure is encountered, so only some of the
> > + * operations requested by a test may have been completed.  Tests that catch
> > + * errors returned by this function should take care to restore the display to
> > + * a sane state after a failure is detected.
> > + *
> > + * Returns: 0 upon success, otherwise the error code of the first error
> > + * encountered.
> > + */
> > +int igt_display_try_commit2(igt_display_t *display, enum igt_commit_style s);
> > +
> > +int igt_display_get_n_pipes(igt_display_t *display);
> >  
> >  const char *igt_output_name(igt_output_t *output);
> >  drmModeModeInfo *igt_output_get_mode(igt_output_t *output);
> > +
> > +/**
> > + * igt_output_override_mode:
> > + * @output: Output of which the mode will be overridden
> > + * @mode: New mode
> > + *
> > + * Overrides the output's mode with @mode, so that it is used instead of the
> > + * mode obtained with get connectors. Note that the mode is used without
> > + * checking if the output supports it, so this might lead to unexpected results.
> > + */
> >  void igt_output_override_mode(igt_output_t *output, drmModeModeInfo *mode);
> > +
> >  void igt_output_set_pipe(igt_output_t *output, enum pipe pipe);
> > +
> >  igt_plane_t *igt_output_get_plane(igt_output_t *output, enum igt_plane plane);
> >  
> >  static inline bool igt_plane_supports_rotation(igt_plane_t *plane)
> > @@ -256,15 +502,61 @@ static inline bool igt_plane_supports_rotation(igt_plane_t *plane)
> >  }
> >  
> >  void igt_plane_set_fb(igt_plane_t *plane, struct igt_fb *fb);
> > +
> >  void igt_plane_set_position(igt_plane_t *plane, int x, int y);
> > +
> > +/**
> > + * igt_plane_set_size:
> > + * @plane: plane pointer for which size to be set
> > + * @w: width
> > + * @h: height
> > + *
> > + * This function sets width and height for requested plane.
> > + * New size will be committed at plane commit time via
> > + * drmModeSetPlane().
> > + */
> >  void igt_plane_set_size(igt_plane_t *plane, int w, int h);
> > +
> >  void igt_plane_set_panning(igt_plane_t *plane, int x, int y);
> > +
> >  void igt_plane_set_rotation(igt_plane_t *plane, igt_rotation_t rotation);
> > +
> > +/**
> > + * igt_crtc_set_background:
> > + * @pipe: pipe pointer to which background color to be set
> > + * @background: background color value in BGR 16bpc
> > + *
> > + * Sets background color for requested pipe. Color value provided here
> > + * will be actually submitted at output commit time via "background_color"
> > + * property.
> > + * For example to get red as background, set background = 0x00000000FFFF.
> > + */
> >  void igt_crtc_set_background(igt_pipe_t *pipe, uint64_t background);
> > -void igt_fb_set_position(struct igt_fb *fb, igt_plane_t *plane,
> > -	uint32_t x, uint32_t y);
> > -void igt_fb_set_size(struct igt_fb *fb, igt_plane_t *plane,
> > -	uint32_t w, uint32_t h);
> > +
> > +/**
> > + * igt_fb_set_position:
> > + * @fb: framebuffer pointer
> > + * @plane: plane
> > + * @x: X position
> > + * @y: Y position
> > + *
> > + * This function sets position for requested framebuffer as src to plane.
> > + * New position will be committed at plane commit time via drmModeSetPlane().
> > + */
> > +void igt_fb_set_position(struct igt_fb *fb, igt_plane_t *plane, uint32_t x, uint32_t y);
> > +
> > +/**
> > + * igt_fb_set_size:
> > + * @fb: framebuffer pointer
> > + * @plane: plane
> > + * @w: width
> > + * @h: height
> > + *
> > + * This function sets fetch rect size from requested framebuffer as src
> > + * to plane. New size will be committed at plane commit time via
> > + * drmModeSetPlane().
> > + */
> > +void igt_fb_set_size(struct igt_fb *fb, igt_plane_t *plane, uint32_t w, uint32_t h);
> >  
> >  void igt_wait_for_vblank(int drm_fd, enum pipe pipe);
> >  
> > @@ -281,12 +573,62 @@ void igt_wait_for_vblank(int drm_fd, enum pipe pipe);
> >  
> >  #define IGT_FIXED(i,f)	((i) << 16 | (f))
> >  
> > +/**
> > + * igt_enable_connectors:
> > + *
> > + * Force connectors to be enabled where this is known to work well. Use
> > + * #igt_reset_connectors to revert the changes.
> > + *
> > + * An exit handler is installed to ensure connectors are reset when the test
> > + * exits.
> > + */
> >  void igt_enable_connectors(void);
> > +
> > +/**
> > + * igt_reset_connectors:
> > + *
> > + * Remove any forced state from the connectors.
> > + */
> >  void igt_reset_connectors(void);
> >  
> >  #define EDID_LENGTH 128
> > -const unsigned char* igt_kms_get_base_edid(void);
> > -const unsigned char* igt_kms_get_alt_edid(void);
> > +
> > +/**
> > + * igt_kms_get_base_edid:
> > + *
> > + * Get the base edid block, which includes the following modes:
> > + *
> > + *  - 1920x1080 60Hz
> > + *  - 1280x720 60Hz
> > + *  - 1024x768 60Hz
> > + *  - 800x600 60Hz
> > + *  - 640x480 60Hz
> > + *
> > + * This can be extended with further features using functions such as
> > + * #kmstest_edid_add_3d.
> > + *
> > + * Returns: a basic edid block
> > + */
> > +const unsigned char *igt_kms_get_base_edid(void);
> > +
> > +/**
> > + * igt_kms_get_alt_edid:
> > + *
> > + * Get an alternate edid block, which includes the following modes:
> > + *
> > + *  - 1400x1050 60Hz
> > + *  - 1920x1080 60Hz
> > + *  - 1280x720 60Hz
> > + *  - 1024x768 60Hz
> > + *  - 800x600 60Hz
> > + *  - 640x480 60Hz
> > + *
> > + * This can be extended with further features using functions such as
> > + * #kmstest_edid_add_3d.
> > + *
> > + * Returns: an alternate edid block
> > + */
> > +const unsigned char *igt_kms_get_alt_edid(void);
> >  
> >  
> >  #endif /* __IGT_KMS_H__ */
> > -- 
> > 2.6.2
> > 
> 
> -- 
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch

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Re: [PATCH i-g-t 1/3] lib/igt_kms migrate existing documentation to header file.

[Daniel Vetter]

On Tue, Dec 22, 2015 at 12:05:10PM +0200, Marius Vlad wrote:
> Hi,
> 
> On Mon, Dec 21, 2015 at 05:09:51PM +0100, Daniel Vetter wrote:
> > On Mon, Dec 21, 2015 at 01:07:23PM +0200, Marius Vlad wrote:
> > > Signed-off-by: Marius Vlad <marius.c.vlad@intel.com>
> > 
> > Hm, why that? Given that this is against the usual style in igt this needs
> > some justification, not an empty commit message.
> 
> I thought that aggregating all the documentation in one place looks much
> more cosmetic and easier to go through. Currently it seems rather hectic
> and disorganized: defines are documented  followed by some vague text
> surrounding some functions -- although not all files exhibit this
> behaviour is rather common from I've seen. It was rather easy to add
> other missing documentation once I had everything in one file. We can
> also add some lines into CONTRIBUTING so people are aware of it.
> 
> Secondly, most of the (user-space) libraries include the documentation
> in its header file -- hence no (proper) justification for the commit
> message.
> 
> I for one, I'd like to change all of the lib/* files with this approach.

The idea behind keeping the documentation right next to the implementation
is that it increases the chances that it gets updated when the function
interface (or semantics) changes. Only docs for #defines, static inlines
and structs should be in headers.

This is the same style as used by kerneldoc, and consistency here is good
imo.

I guess for libraries it makes sense to put fully into headers since the
primary consumer will be external people who only have the headers
installed. But for both igt and kernel the docs are for project-internal
use only, so there's no such constraint.

Given all that I prefer the current style. Also, no one else has
complained about it yet, so I think it's fine.

Thanks, Daniel

> 
> > 
> > Thanks, Daniel
> > 
> > > ---
> > >  lib/igt_kms.c | 321 +-------------------------------------
> > >  lib/igt_kms.h | 486 +++++++++++++++++++++++++++++++++++++++++++++++++---------
> > >  2 files changed, 418 insertions(+), 389 deletions(-)
> > > 
> > > diff --git a/lib/igt_kms.c b/lib/igt_kms.c
> > > index 5d5a95c..3dc559d 100644
> > > --- a/lib/igt_kms.c
> > > +++ b/lib/igt_kms.c
> > > @@ -88,23 +88,7 @@ static void update_edid_csum(unsigned char *edid)
> > >  #define EDID_NAME base_edid
> > >  #include "igt_edid_template.h"
> > >  
> > > -/**
> > > - * igt_kms_get_base_edid:
> > > - *
> > > - * Get the base edid block, which includes the following modes:
> > > - *
> > > - *  - 1920x1080 60Hz
> > > - *  - 1280x720 60Hz
> > > - *  - 1024x768 60Hz
> > > - *  - 800x600 60Hz
> > > - *  - 640x480 60Hz
> > > - *
> > > - * This can be extended with further features using functions such as
> > > - * #kmstest_edid_add_3d.
> > > - *
> > > - * Returns: a basic edid block
> > > - */
> > > -const unsigned char* igt_kms_get_base_edid(void)
> > > +const unsigned char *igt_kms_get_base_edid(void)
> > >  {
> > >  	update_edid_csum(base_edid);
> > >  
> > > @@ -128,59 +112,13 @@ const unsigned char* igt_kms_get_base_edid(void)
> > >  #define EDID_NAME alt_edid
> > >  #include "igt_edid_template.h"
> > >  
> > > -/**
> > > - * igt_kms_get_alt_edid:
> > > - *
> > > - * Get an alternate edid block, which includes the following modes:
> > > - *
> > > - *  - 1400x1050 60Hz
> > > - *  - 1920x1080 60Hz
> > > - *  - 1280x720 60Hz
> > > - *  - 1024x768 60Hz
> > > - *  - 800x600 60Hz
> > > - *  - 640x480 60Hz
> > > - *
> > > - * This can be extended with further features using functions such as
> > > - * #kmstest_edid_add_3d.
> > > - *
> > > - * Returns: an alternate edid block
> > > - */
> > > -const unsigned char* igt_kms_get_alt_edid(void)
> > > +const unsigned char *igt_kms_get_alt_edid(void)
> > >  {
> > >  	update_edid_csum(alt_edid);
> > >  
> > >  	return alt_edid;
> > >  }
> > >  
> > > -/**
> > > - * SECTION:igt_kms
> > > - * @short_description: Kernel modesetting support library
> > > - * @title: KMS
> > > - * @include: igt.h
> > > - *
> > > - * This library provides support to enumerate and set modeset configurations.
> > > - *
> > > - * There are two parts in this library: First the low level helper function
> > > - * which directly build on top of raw ioctls or the interfaces provided by
> > > - * libdrm. Those functions all have a kmstest_ prefix.
> > > - *
> > > - * The second part is a high-level library to manage modeset configurations
> > > - * which abstracts away some of the low-level details like the difference
> > > - * between legacy and universal plane support for setting cursors or in the
> > > - * future the difference between legacy and atomic commit. These high-level
> > > - * functions have all igt_ prefixes. This part is still very much work in
> > > - * progress and so also lacks a bit documentation for the individual functions.
> > > - *
> > > - * Note that this library's header pulls in the [i-g-t framebuffer](intel-gpu-tools-i-g-t-framebuffer.html)
> > > - * library as a dependency.
> > > - */
> > > -
> > > -/**
> > > - * kmstest_pipe_name:
> > > - * @pipe: display pipe
> > > - *
> > > - * Returns: String represnting @pipe, e.g. "A".
> > > - */
> > >  const char *kmstest_pipe_name(enum pipe pipe)
> > >  {
> > >  	const char *str[] = { "A", "B", "C" };
> > > @@ -191,12 +129,6 @@ const char *kmstest_pipe_name(enum pipe pipe)
> > >  	return str[pipe];
> > >  }
> > >  
> > > -/**
> > > - * kmstest_plane_name:
> > > - * @plane: display plane
> > > - *
> > > - * Returns: String represnting @pipe, e.g. "plane1".
> > > - */
> > >  const char *kmstest_plane_name(enum igt_plane plane)
> > >  {
> > >  	static const char *names[] = {
> > > @@ -235,12 +167,6 @@ static const char *mode_stereo_name(const drmModeModeInfo *mode)
> > >  	}
> > >  }
> > >  
> > > -/**
> > > - * kmstest_dump_mode:
> > > - * @mode: libdrm mode structure
> > > - *
> > > - * Prints @mode to stdout in a huma-readable form.
> > > - */
> > >  void kmstest_dump_mode(drmModeModeInfo *mode)
> > >  {
> > >  	const char *stereo = mode_stereo_name(mode);
> > > @@ -256,14 +182,6 @@ void kmstest_dump_mode(drmModeModeInfo *mode)
> > >  		 stereo ? stereo : "", stereo ? ")" : "");
> > >  }
> > >  
> > > -/**
> > > - * kmstest_get_pipe_from_crtc_id:
> > > - * @fd: DRM fd
> > > - * @crtc_id: DRM CRTC id
> > > - *
> > > - * Returns: The pipe number for the given DRM CRTC @crtc_id. This maps directly
> > > - * to an enum pipe value used in other helper functions.
> > > - */
> > >  int kmstest_get_pipe_from_crtc_id(int fd, int crtc_id)
> > >  {
> > >  	struct drm_i915_get_pipe_from_crtc_id pfci;
> > > @@ -317,11 +235,6 @@ err:
> > >  
> > >  static unsigned long orig_vt_mode = -1UL;
> > >  
> > > -/**
> > > - * kmstest_restore_vt_mode:
> > > - *
> > > - * Restore the VT mode in use before #kmstest_set_vt_graphics_mode was called.
> > > - */
> > >  void kmstest_restore_vt_mode(void)
> > >  {
> > >  	long ret;
> > > @@ -335,16 +248,6 @@ void kmstest_restore_vt_mode(void)
> > >  	}
> > >  }
> > >  
> > > -/**
> > > - * kmstest_set_vt_graphics_mode:
> > > - *
> > > - * Sets the controlling VT (if available) into graphics/raw mode and installs
> > > - * an igt exit handler to set the VT back to text mode on exit. Use
> > > - * #kmstest_restore_vt_mode to restore the previous VT mode manually.
> > > - *
> > > - * All kms tests must call this function to make sure that the fbcon doesn't
> > > - * interfere by e.g. blanking the screen.
> > > - */
> > >  void kmstest_set_vt_graphics_mode(void)
> > >  {
> > >  	long ret;
> > > @@ -367,16 +270,6 @@ static void reset_connectors_at_exit(int sig)
> > >  	igt_reset_connectors();
> > >  }
> > >  
> > > -/**
> > > - * kmstest_force_connector:
> > > - * @fd: drm file descriptor
> > > - * @connector: connector
> > > - * @state: state to force on @connector
> > > - *
> > > - * Force the specified state on the specified connector.
> > > - *
> > > - * Returns: true on success
> > > - */
> > >  bool kmstest_force_connector(int drm_fd, drmModeConnector *connector,
> > >  			     enum kmstest_force_connector_state state)
> > >  {
> > > @@ -459,18 +352,6 @@ bool kmstest_force_connector(int drm_fd, drmModeConnector *connector,
> > >  	return (ret == -1) ? false : true;
> > >  }
> > >  
> > > -/**
> > > - * kmstest_force_edid:
> > > - * @drm_fd: drm file descriptor
> > > - * @connector: connector to set @edid on
> > > - * @edid: An EDID data block
> > > - * @length: length of the EDID data. #EDID_LENGTH defines the standard EDID
> > > - * length
> > > - *
> > > - * Set the EDID data on @connector to @edid. See also #igt_kms_get_base_edid.
> > > - *
> > > - * If @length is zero, the forced EDID will be removed.
> > > - */
> > >  void kmstest_force_edid(int drm_fd, drmModeConnector *connector,
> > >  			const unsigned char *edid, size_t length)
> > >  {
> > > @@ -499,16 +380,6 @@ void kmstest_force_edid(int drm_fd, drmModeConnector *connector,
> > >  	igt_assert(ret != -1);
> > >  }
> > >  
> > > -/**
> > > - * kmstest_get_connector_default_mode:
> > > - * @drm_fd: DRM fd
> > > - * @connector: libdrm connector
> > > - * @mode: libdrm mode
> > > - *
> > > - * Retrieves the default mode for @connector and stores it in @mode.
> > > - *
> > > - * Returns: true on success, false on failure
> > > - */
> > >  bool kmstest_get_connector_default_mode(int drm_fd, drmModeConnector *connector,
> > >  					drmModeModeInfo *mode)
> > >  {
> > > @@ -532,16 +403,6 @@ bool kmstest_get_connector_default_mode(int drm_fd, drmModeConnector *connector,
> > >  	return true;
> > >  }
> > >  
> > > -/**
> > > - * kmstest_get_connector_config:
> > > - * @drm_fd: DRM fd
> > > - * @connector_id: DRM connector id
> > > - * @crtc_idx_mask: mask of allowed DRM CRTC indices
> > > - * @config: structure filled with the possible configuration
> > > - *
> > > - * This tries to find a suitable configuration for the given connector and CRTC
> > > - * constraint and fills it into @config.
> > > - */
> > >  bool kmstest_get_connector_config(int drm_fd, uint32_t connector_id,
> > >  				  unsigned long crtc_idx_mask,
> > >  				  struct kmstest_connector_config *config)
> > > @@ -633,12 +494,6 @@ err1:
> > >  	return false;
> > >  }
> > >  
> > > -/**
> > > - * kmstest_free_connector_config:
> > > - * @config: connector configuration structure
> > > - *
> > > - * Free any resources in @config allocated in kmstest_get_connector_config().
> > > - */
> > >  void kmstest_free_connector_config(struct kmstest_connector_config *config)
> > >  {
> > >  	drmModeFreeCrtc(config->crtc);
> > > @@ -646,14 +501,6 @@ void kmstest_free_connector_config(struct kmstest_connector_config *config)
> > >  	drmModeFreeConnector(config->connector);
> > >  }
> > >  
> > > -/**
> > > - * kmstest_set_connector_dpms:
> > > - * @fd: DRM fd
> > > - * @connector: libdrm connector
> > > - * @mode: DRM DPMS value
> > > - *
> > > - * This function sets the DPMS setting of @connector to @mode.
> > > - */
> > >  void kmstest_set_connector_dpms(int fd, drmModeConnector *connector, int mode)
> > >  {
> > >  	int i, dpms = 0;
> > > @@ -682,21 +529,6 @@ void kmstest_set_connector_dpms(int fd, drmModeConnector *connector, int mode)
> > >  					       dpms, mode) == 0);
> > >  }
> > >  
> > > -/**
> > > - * kmstest_get_property:
> > > - * @drm_fd: drm file descriptor
> > > - * @object_id: object whose properties we're going to get
> > > - * @object_type: type of obj_id (DRM_MODE_OBJECT_*)
> > > - * @name: name of the property we're going to get
> > > - * @prop_id: if not NULL, returns the property id
> > > - * @value: if not NULL, returns the property value
> > > - * @prop: if not NULL, returns the property, and the caller will have to free
> > > - *        it manually.
> > > - *
> > > - * Finds a property with the given name on the given object.
> > > - *
> > > - * Returns: true in case we found something.
> > > - */
> > >  bool
> > >  kmstest_get_property(int drm_fd, uint32_t object_id, uint32_t object_type,
> > >  		     const char *name, uint32_t *prop_id /* out */,
> > > @@ -734,16 +566,6 @@ kmstest_get_property(int drm_fd, uint32_t object_id, uint32_t object_type,
> > >  	return found;
> > >  }
> > >  
> > > -/**
> > > - * kmstest_edid_add_3d:
> > > - * @edid: an existing valid edid block
> > > - * @length: length of @edid
> > > - * @new_edid_ptr: pointer to where the new edid will be placed
> > > - * @new_length: pointer to the size of the new edid
> > > - *
> > > - * Makes a copy of an existing edid block and adds an extension indicating
> > > - * stereo 3D capabilities.
> > > - */
> > >  void kmstest_edid_add_3d(const unsigned char *edid, size_t length,
> > >  			 unsigned char *new_edid_ptr[], size_t *new_length)
> > >  {
> > > @@ -814,13 +636,6 @@ void kmstest_edid_add_3d(const unsigned char *edid, size_t length,
> > >  	new_edid[length + 127] = 256 - sum;
> > >  }
> > >  
> > > -/**
> > > - * kmstest_unset_all_crtcs:
> > > - * @drm_fd: the DRM fd
> > > - * @resources: libdrm resources pointer
> > > - *
> > > - * Disables all the screens.
> > > - */
> > >  void kmstest_unset_all_crtcs(int drm_fd, drmModeResPtr resources)
> > >  {
> > >  	int i, rc;
> > > @@ -964,15 +779,6 @@ static int get_drm_plane_type(int drm_fd, uint32_t plane_id)
> > >  	return DRM_PLANE_TYPE_OVERLAY;
> > >  }
> > >  
> > > -/**
> > > - * igt_display_init:
> > > - * @display: a pointer to an #igt_display_t structure
> > > - * @drm_fd: a drm file descriptor
> > > - *
> > > - * Initialize @display and allocate the various resources required. Use
> > > - * #igt_display_fini to release the resources when they are no longer required.
> > > - *
> > > - */
> > >  void igt_display_init(igt_display_t *display, int drm_fd)
> > >  {
> > >  	drmModeRes *resources;
> > > @@ -1171,13 +977,6 @@ static void igt_output_fini(igt_output_t *output)
> > >  	free(output->name);
> > >  }
> > >  
> > > -/**
> > > - * igt_display_fini:
> > > - * @display: a pointer to an #igt_display_t structure
> > > - *
> > > - * Release any resources associated with @display. This does not free @display
> > > - * itself.
> > > - */
> > >  void igt_display_fini(igt_display_t *display)
> > >  {
> > >  	int i;
> > > @@ -1648,24 +1447,6 @@ static int do_display_commit(igt_display_t *display,
> > >  	return 0;
> > >  }
> > >  
> > > -/**
> > > - * igt_display_commit2:
> > > - * @display: DRM device handle
> > > - * @s: Commit style
> > > - *
> > > - * Commits framebuffer and positioning changes to all planes of each display
> > > - * pipe, using a specific API to perform the programming.  This function should
> > > - * be used to exercise a specific driver programming API; igt_display_commit
> > > - * should be used instead if the API used is unimportant to the test being run.
> > > - *
> > > - * This function should only be used to commit changes that are expected to
> > > - * succeed, since any failure during the commit process will cause the IGT
> > > - * subtest to fail.  To commit changes that are expected to fail, use
> > > - * @igt_try_display_commit2 instead.
> > > - *
> > > - * Returns: 0 upon success.  This function will never return upon failure
> > > - * since igt_fail() at lower levels will longjmp out of it.
> > > - */
> > >  int igt_display_commit2(igt_display_t *display,
> > >  		       enum igt_commit_style s)
> > >  {
> > > @@ -1674,40 +1455,11 @@ int igt_display_commit2(igt_display_t *display,
> > >  	return 0;
> > >  }
> > >  
> > > -/**
> > > - * igt_display_try_commit2:
> > > - * @display: DRM device handle
> > > - * @s: Commit style
> > > - *
> > > - * Attempts to commit framebuffer and positioning changes to all planes of each
> > > - * display pipe.  This function should be used to commit changes that are
> > > - * expected to fail, so that the error code can be checked for correctness.
> > > - * For changes that are expected to succeed, use @igt_display_commit instead.
> > > - *
> > > - * Note that in non-atomic commit styles, no display programming will be
> > > - * performed after the first failure is encountered, so only some of the
> > > - * operations requested by a test may have been completed.  Tests that catch
> > > - * errors returned by this function should take care to restore the display to
> > > - * a sane state after a failure is detected.
> > > - *
> > > - * Returns: 0 upon success, otherwise the error code of the first error
> > > - * encountered.
> > > - */
> > >  int igt_display_try_commit2(igt_display_t *display, enum igt_commit_style s)
> > >  {
> > >  	return do_display_commit(display, s, false);
> > >  }
> > >  
> > > -/**
> > > - * igt_display_commit:
> > > - * @display: DRM device handle
> > > - *
> > > - * Commits framebuffer and positioning changes to all planes of each display
> > > - * pipe.
> > > - *
> > > - * Returns: 0 upon success.  This function will never return upon failure
> > > - * since igt_fail() at lower levels will longjmp out of it.
> > > - */
> > >  int igt_display_commit(igt_display_t *display)
> > >  {
> > >  	return igt_display_commit2(display, COMMIT_LEGACY);
> > > @@ -1723,15 +1475,6 @@ drmModeModeInfo *igt_output_get_mode(igt_output_t *output)
> > >  	return &output->config.default_mode;
> > >  }
> > >  
> > > -/**
> > > - * igt_output_override_mode:
> > > - * @output: Output of which the mode will be overridden
> > > - * @mode: New mode
> > > - *
> > > - * Overrides the output's mode with @mode, so that it is used instead of the
> > > - * mode obtained with get connectors. Note that the mode is used without
> > > - * checking if the output supports it, so this might lead to unexpected results.
> > > - */
> > >  void igt_output_override_mode(igt_output_t *output, drmModeModeInfo *mode)
> > >  {
> > >  	output->override_mode = *mode;
> > > @@ -1803,16 +1546,6 @@ void igt_plane_set_position(igt_plane_t *plane, int x, int y)
> > >  	plane->position_changed = true;
> > >  }
> > >  
> > > -/**
> > > - * igt_plane_set_size:
> > > - * @plane: plane pointer for which size to be set
> > > - * @w: width
> > > - * @h: height
> > > - *
> > > - * This function sets width and height for requested plane.
> > > - * New size will be committed at plane commit time via
> > > - * drmModeSetPlane().
> > > - */
> > >  void igt_plane_set_size(igt_plane_t *plane, int w, int h)
> > >  {
> > >  	igt_pipe_t *pipe = plane->pipe;
> > > @@ -1827,16 +1560,6 @@ void igt_plane_set_size(igt_plane_t *plane, int w, int h)
> > >  	plane->size_changed = true;
> > >  }
> > >  
> > > -/**
> > > - * igt_fb_set_position:
> > > - * @fb: framebuffer pointer
> > > - * @plane: plane
> > > - * @x: X position
> > > - * @y: Y position
> > > - *
> > > - * This function sets position for requested framebuffer as src to plane.
> > > - * New position will be committed at plane commit time via drmModeSetPlane().
> > > - */
> > >  void igt_fb_set_position(struct igt_fb *fb, igt_plane_t *plane,
> > >  	uint32_t x, uint32_t y)
> > >  {
> > > @@ -1852,17 +1575,6 @@ void igt_fb_set_position(struct igt_fb *fb, igt_plane_t *plane,
> > >  	plane->fb_changed = true;
> > >  }
> > >  
> > > -/**
> > > - * igt_fb_set_size:
> > > - * @fb: framebuffer pointer
> > > - * @plane: plane
> > > - * @w: width
> > > - * @h: height
> > > - *
> > > - * This function sets fetch rect size from requested framebuffer as src
> > > - * to plane. New size will be committed at plane commit time via
> > > - * drmModeSetPlane().
> > > - */
> > >  void igt_fb_set_size(struct igt_fb *fb, igt_plane_t *plane,
> > >  	uint32_t w, uint32_t h)
> > >  {
> > > @@ -1923,16 +1635,6 @@ void igt_plane_set_rotation(igt_plane_t *plane, igt_rotation_t rotation)
> > >  	plane->rotation_changed = true;
> > >  }
> > >  
> > > -/**
> > > - * igt_crtc_set_background:
> > > - * @pipe: pipe pointer to which background color to be set
> > > - * @background: background color value in BGR 16bpc
> > > - *
> > > - * Sets background color for requested pipe. Color value provided here
> > > - * will be actually submitted at output commit time via "background_color"
> > > - * property.
> > > - * For example to get red as background, set background = 0x00000000FFFF.
> > > - */
> > >  void igt_crtc_set_background(igt_pipe_t *pipe, uint64_t background)
> > >  {
> > >  	igt_display_t *display = pipe->display;
> > > @@ -1946,7 +1648,6 @@ void igt_crtc_set_background(igt_pipe_t *pipe, uint64_t background)
> > >  	pipe->background_changed = true;
> > >  }
> > >  
> > > -
> > >  void igt_wait_for_vblank(int drm_fd, enum pipe pipe)
> > >  {
> > >  	drmVBlank wait_vbl;
> > > @@ -1960,15 +1661,6 @@ void igt_wait_for_vblank(int drm_fd, enum pipe pipe)
> > >  	igt_assert(drmWaitVBlank(drm_fd, &wait_vbl) == 0);
> > >  }
> > >  
> > > -/**
> > > - * igt_enable_connectors:
> > > - *
> > > - * Force connectors to be enabled where this is known to work well. Use
> > > - * #igt_reset_connectors to revert the changes.
> > > - *
> > > - * An exit handler is installed to ensure connectors are reset when the test
> > > - * exits.
> > > - */
> > >  void igt_enable_connectors(void)
> > >  {
> > >  	drmModeRes *res;
> > > @@ -1983,8 +1675,8 @@ void igt_enable_connectors(void)
> > >  
> > >  		c = drmModeGetConnectorCurrent(drm_fd, res->connectors[i]);
> > >  
> > > -		/* don't attempt to force connectors that are already connected
> > > -		 */
> > > +		/* don't attempt to force connectors that
> > > +		 * are already connected */
> > >  		if (c->connection == DRM_MODE_CONNECTED)
> > >  			continue;
> > >  
> > > @@ -2001,11 +1693,6 @@ void igt_enable_connectors(void)
> > >  	close(drm_fd);
> > >  }
> > >  
> > > -/**
> > > - * igt_reset_connectors:
> > > - *
> > > - * Remove any forced state from the connectors.
> > > - */
> > >  void igt_reset_connectors(void)
> > >  {
> > >  	char **tmp;
> > > diff --git a/lib/igt_kms.h b/lib/igt_kms.h
> > > index 94f315f..2cc8a3b 100644
> > > --- a/lib/igt_kms.h
> > > +++ b/lib/igt_kms.h
> > > @@ -25,6 +25,30 @@
> > >   * 	Damien Lespiau <damien.lespiau@intel.com>
> > >   */
> > >  
> > > +/**
> > > + * SECTION:igt_kms
> > > + * @short_description: Kernel modesetting support library
> > > + * @title: KMS
> > > + * @include: igt.h
> > > + *
> > > + * This library provides support to enumerate and set modeset configurations.
> > > + *
> > > + * There are two parts in this library: First the low level helper function
> > > + * which directly build on top of raw ioctls or the interfaces provided by
> > > + * libdrm. Those functions all have a kmstest_ prefix.
> > > + *
> > > + * The second part is a high-level library to manage modeset configurations
> > > + * which abstracts away some of the low-level details like the difference
> > > + * between legacy and universal plane support for setting cursors or in the
> > > + * future the difference between legacy and atomic commit. These high-level
> > > + * functions have all igt_ prefixes. This part is still very much work in
> > > + * progress and so also lacks a bit documentation for the individual functions.
> > > + *
> > > + * Note that this library's header pulls in the [i-g-t
> > > + * framebuffer](intel-gpu-tools-Framebuffer.html) library as a
> > > + * dependency.
> > > + */
> > > +
> > >  #ifndef __IGT_KMS_H__
> > >  #define __IGT_KMS_H__
> > >  
> > > @@ -37,7 +61,6 @@
> > >  #include "igt_fb.h"
> > >  #include "ioctl_wrappers.h"
> > >  
> > > -/* Low-level helpers with kmstest_ prefix */
> > >  
> > >  enum pipe {
> > >          PIPE_ANY = -1,
> > > @@ -46,7 +69,6 @@ enum pipe {
> > >          PIPE_C,
> > >          I915_MAX_PIPES
> > >  };
> > > -const char *kmstest_pipe_name(enum pipe pipe);
> > >  
> > >  /* We namespace this enum to not conflict with the Android i915_drm.h */
> > >  enum igt_plane {
> > > @@ -57,8 +79,6 @@ enum igt_plane {
> > >          IGT_PLANE_CURSOR,
> > >  };
> > >  
> > > -const char *kmstest_plane_name(enum igt_plane plane);
> > > -
> > >  enum port {
> > >          PORT_A = 0,
> > >          PORT_B,
> > > @@ -68,44 +88,6 @@ enum port {
> > >          I915_MAX_PORTS
> > >  };
> > >  
> > > -/**
> > > - * kmstest_port_name:
> > > - * @port: display plane
> > > - *
> > > - * Returns: String representing @port, e.g. "A".
> > > - */
> > > -#define kmstest_port_name(port) ((port) + 'A')
> > > -
> > > -/**
> > > - * kmstest_encoder_type_str:
> > > - * @type: DRM_MODE_ENCODER_* enumeration value
> > > - *
> > > - * Returns: A string representing the drm encoder @type.
> > > - */
> > > -const char *kmstest_encoder_type_str(int type);
> > > -
> > > -/**
> > > - * kmstest_connector_status_str:
> > > - * @status: DRM_MODE_* connector status value
> > > - *
> > > - * Returns: A string representing the drm connector status @status.
> > > - */
> > > -const char *kmstest_connector_status_str(int status);
> > > -
> > > -/**
> > > - * kmstest_connector_type_str:
> > > - * @type: DRM_MODE_CONNECTOR_* enumeration value
> > > - *
> > > - * Returns: A string representing the drm connector @type.
> > > - */
> > > -const char *kmstest_connector_type_str(int type);
> > > -
> > > -void kmstest_dump_mode(drmModeModeInfo *mode);
> > > -
> > > -int kmstest_get_pipe_from_crtc_id(int fd, int crtc_id);
> > > -void kmstest_set_vt_graphics_mode(void);
> > > -void kmstest_restore_vt_mode(void);
> > > -
> > >  struct kmstest_connector_config {
> > >  	drmModeCrtc *crtc;
> > >  	drmModeConnector *connector;
> > > @@ -129,25 +111,6 @@ enum kmstest_force_connector_state {
> > >  	FORCE_CONNECTOR_OFF
> > >  };
> > >  
> > > -bool kmstest_force_connector(int fd, drmModeConnector *connector,
> > > -			     enum kmstest_force_connector_state state);
> > > -void kmstest_edid_add_3d(const unsigned char *edid, size_t length, unsigned char *new_edid_ptr[], size_t *new_length);
> > > -void kmstest_force_edid(int drm_fd, drmModeConnector *connector,
> > > -			const unsigned char *edid, size_t length);
> > > -
> > > -bool kmstest_get_connector_default_mode(int drm_fd, drmModeConnector *connector,
> > > -					drmModeModeInfo *mode);
> > > -bool kmstest_get_connector_config(int drm_fd, uint32_t connector_id,
> > > -				  unsigned long crtc_idx_mask,
> > > -				  struct kmstest_connector_config *config);
> > > -void kmstest_free_connector_config(struct kmstest_connector_config *config);
> > > -
> > > -void kmstest_set_connector_dpms(int fd, drmModeConnector *connector, int mode);
> > > -bool kmstest_get_property(int drm_fd, uint32_t object_id, uint32_t object_type,
> > > -			  const char *name, uint32_t *prop_id, uint64_t *value,
> > > -			  drmModePropertyPtr *prop);
> > > -void kmstest_unset_all_crtcs(int drm_fd, drmModeResPtr resources);
> > > -
> > >  /*
> > >   * A small modeset API
> > >   */
> > > @@ -160,8 +123,8 @@ enum igt_commit_style {
> > >  };
> > >  
> > >  typedef struct igt_display igt_display_t;
> > > -typedef struct igt_pipe igt_pipe_t;
> > >  typedef uint32_t igt_fixed_t;			/* 16.16 fixed point */
> > > +typedef struct igt_pipe igt_pipe_t;
> > >  
> > >  typedef enum {
> > >  	/* this maps to the kernel API */
> > > @@ -237,17 +200,300 @@ struct igt_display {
> > >  	bool has_universal_planes;
> > >  };
> > >  
> > > +/* Low-level helpers with kmstest_ prefix */
> > > +
> > > +/**
> > > + * kmstest_port_name:
> > > + * @port: display plane
> > > + *
> > > + * Returns: String representing @port, e.g. "A".
> > > + */
> > > +#define kmstest_port_name(port) ((port) + 'A')
> > > +
> > > +/**
> > > + * kmstest_pipe_name:
> > > + * @pipe: display pipe
> > > + *
> > > + * Returns: String represnting @pipe, e.g. "A".
> > > + */
> > > +const char *kmstest_pipe_name(enum pipe pipe);
> > > +
> > > +/**
> > > + * kmstest_plane_name:
> > > + * @plane: display plane
> > > + *
> > > + * Returns: String represnting @pipe, e.g. "plane1".
> > > + */
> > > +const char *kmstest_plane_name(enum igt_plane plane);
> > > +
> > > +
> > > +/**
> > > + * kmstest_encoder_type_str:
> > > + * @type: DRM_MODE_ENCODER_* enumeration value
> > > + *
> > > + * Returns: A string representing the drm encoder @type.
> > > + */
> > > +const char *kmstest_encoder_type_str(int type);
> > > +
> > > +/**
> > > + * kmstest_connector_status_str:
> > > + * @status: DRM_MODE_* connector status value
> > > + *
> > > + * Returns: A string representing the drm connector status @status.
> > > + */
> > > +const char *kmstest_connector_status_str(int status);
> > > +
> > > +/**
> > > + * kmstest_connector_type_str:
> > > + * @type: DRM_MODE_CONNECTOR_* enumeration value
> > > + *
> > > + * Returns: A string representing the drm connector @type.
> > > + */
> > > +const char *kmstest_connector_type_str(int type);
> > > +
> > > +/**
> > > + * kmstest_dump_mode:
> > > + * @mode: libdrm mode structure
> > > + *
> > > + * Prints @mode to stdout in a huma-readable form.
> > > + */
> > > +void kmstest_dump_mode(drmModeModeInfo *mode);
> > > +
> > > +/**
> > > + * kmstest_get_pipe_from_crtc_id:
> > > + * @fd: DRM fd
> > > + * @crtc_id: DRM CRTC id
> > > + *
> > > + * Returns: The pipe number for the given DRM CRTC @crtc_id. This maps directly
> > > + * to an enum pipe value used in other helper functions.
> > > + */
> > > +int kmstest_get_pipe_from_crtc_id(int fd, int crtc_id);
> > > +
> > > +/**
> > > + * kmstest_set_vt_graphics_mode:
> > > + *
> > > + * Sets the controlling VT (if available) into graphics/raw mode and installs
> > > + * an igt exit handler to set the VT back to text mode on exit. Use
> > > + * #kmstest_restore_vt_mode to restore the previous VT mode manually.
> > > + *
> > > + * All kms tests must call this function to make sure that the fbcon doesn't
> > > + * interfere by e.g. blanking the screen.
> > > + */
> > > +void kmstest_set_vt_graphics_mode(void);
> > > +
> > > +/**
> > > + * kmstest_restore_vt_mode:
> > > + *
> > > + * Restore the VT mode in use before #kmstest_set_vt_graphics_mode was called.
> > > + */
> > > +void kmstest_restore_vt_mode(void);
> > > +
> > > +/**
> > > + * kmstest_force_connector:
> > > + * @fd: drm file descriptor
> > > + * @connector: connector
> > > + * @state: state to force on @connector
> > > + *
> > > + * Force the specified state on the specified connector.
> > > + *
> > > + * Returns: true on success
> > > + */
> > > +bool kmstest_force_connector(int fd, drmModeConnector *connector,
> > > +			     enum kmstest_force_connector_state state);
> > > +
> > > +/**
> > > + * kmstest_edid_add_3d:
> > > + * @edid: an existing valid edid block
> > > + * @length: length of @edid
> > > + * @new_edid_ptr: pointer to where the new edid will be placed
> > > + * @new_length: pointer to the size of the new edid
> > > + *
> > > + * Makes a copy of an existing edid block and adds an extension indicating
> > > + * stereo 3D capabilities.
> > > + */
> > > +void kmstest_edid_add_3d(const unsigned char *edid, size_t length,
> > > +			 unsigned char *new_edid_ptr[], size_t *new_length);
> > > +
> > > +/**
> > > + * kmstest_force_edid:
> > > + * @drm_fd: drm file descriptor
> > > + * @connector: connector to set @edid on
> > > + * @edid: An EDID data block
> > > + * @length: length of the EDID data. #EDID_LENGTH defines the standard EDID
> > > + * length
> > > + *
> > > + * Set the EDID data on @connector to @edid. See also #igt_kms_get_base_edid.
> > > + *
> > > + * If @length is zero, the forced EDID will be removed.
> > > + */
> > > +void kmstest_force_edid(int drm_fd, drmModeConnector *connector,
> > > +			const unsigned char *edid, size_t length);
> > > +
> > > +/**
> > > + * kmstest_get_connector_default_mode:
> > > + * @drm_fd: DRM fd
> > > + * @connector: libdrm connector
> > > + * @mode: libdrm mode
> > > + *
> > > + * Retrieves the default mode for @connector and stores it in @mode.
> > > + *
> > > + * Returns: true on success, false on failure
> > > + */
> > > +bool kmstest_get_connector_default_mode(int drm_fd, drmModeConnector *connector,
> > > +					drmModeModeInfo *mode);
> > > +
> > > +/**
> > > + * kmstest_get_connector_config:
> > > + * @drm_fd: DRM fd
> > > + * @connector_id: DRM connector id
> > > + * @crtc_idx_mask: mask of allowed DRM CRTC indices
> > > + * @config: structure filled with the possible configuration
> > > + *
> > > + * This tries to find a suitable configuration for the given connector and CRTC
> > > + * constraint and fills it into @config.
> > > + */
> > > +bool kmstest_get_connector_config(int drm_fd, uint32_t connector_id,
> > > +				  unsigned long crtc_idx_mask,
> > > +				  struct kmstest_connector_config *config);
> > > +
> > > +/**
> > > + * kmstest_free_connector_config:
> > > + * @config: connector configuration structure
> > > + *
> > > + * Free any resources in @config allocated in kmstest_get_connector_config().
> > > + */
> > > +void kmstest_free_connector_config(struct kmstest_connector_config *config);
> > > +
> > > +/**
> > > + * kmstest_set_connector_dpms:
> > > + * @fd: DRM fd
> > > + * @connector: libdrm connector
> > > + * @mode: DRM DPMS value
> > > + *
> > > + * This function sets the DPMS setting of @connector to @mode.
> > > + */
> > > +void kmstest_set_connector_dpms(int fd, drmModeConnector *connector, int mode);
> > > +
> > > +/**
> > > + * kmstest_get_property:
> > > + * @drm_fd: drm file descriptor
> > > + * @object_id: object whose properties we're going to get
> > > + * @object_type: type of obj_id (DRM_MODE_OBJECT_*)
> > > + * @name: name of the property we're going to get
> > > + * @prop_id: if not NULL, returns the property id
> > > + * @value: if not NULL, returns the property value
> > > + * @prop: if not NULL, returns the property, and the caller will have to free
> > > + *        it manually.
> > > + *
> > > + * Finds a property with the given name on the given object.
> > > + *
> > > + * Returns: true in case we found something.
> > > + */
> > > +bool kmstest_get_property(int drm_fd, uint32_t object_id, uint32_t object_type,
> > > +			  const char *name, uint32_t *prop_id, uint64_t *value,
> > > +			  drmModePropertyPtr *prop);
> > > +
> > > +/**
> > > + * kmstest_unset_all_crtcs:
> > > + * @drm_fd: the DRM fd
> > > + * @resources: libdrm resources pointer
> > > + *
> > > + * Disables all the screens.
> > > + */
> > > +void kmstest_unset_all_crtcs(int drm_fd, drmModeResPtr resources);
> > > +
> > > +
> > > +/**
> > > + * igt_display_init:
> > > + * @display: a pointer to an #igt_display_t structure
> > > + * @drm_fd: a drm file descriptor
> > > + *
> > > + * Initialize @display and allocate the various resources required. Use
> > > + * #igt_display_fini to release the resources when they are no longer required.
> > > + *
> > > + */
> > >  void igt_display_init(igt_display_t *display, int drm_fd);
> > > +
> > > +/**
> > > + * igt_display_fini:
> > > + * @display: a pointer to an #igt_display_t structure
> > > + *
> > > + * Release any resources associated with @display. This does not free @display
> > > + * itself.
> > > + */
> > >  void igt_display_fini(igt_display_t *display);
> > > -int  igt_display_commit2(igt_display_t *display, enum igt_commit_style s);
> > > -int  igt_display_commit(igt_display_t *display);
> > > -int  igt_display_try_commit2(igt_display_t *display, enum igt_commit_style s);
> > > -int  igt_display_get_n_pipes(igt_display_t *display);
> > > +
> > > +/**
> > > + * igt_display_commit2:
> > > + * @display: DRM device handle
> > > + * @s: Commit style
> > > + *
> > > + * Commits framebuffer and positioning changes to all planes of each display
> > > + * pipe, using a specific API to perform the programming.  This function should
> > > + * be used to exercise a specific driver programming API; igt_display_commit
> > > + * should be used instead if the API used is unimportant to the test being run.
> > > + *
> > > + * This function should only be used to commit changes that are expected to
> > > + * succeed, since any failure during the commit process will cause the IGT
> > > + * subtest to fail.  To commit changes that are expected to fail, use
> > > + * @igt_try_display_commit2 instead.
> > > + *
> > > + * Returns: 0 upon success.  This function will never return upon failure
> > > + * since igt_fail() at lower levels will longjmp out of it.
> > > + */
> > > +int igt_display_commit2(igt_display_t *display, enum igt_commit_style s);
> > > +
> > > +/**
> > > + * igt_display_commit:
> > > + * @display: DRM device handle
> > > + *
> > > + * Commits framebuffer and positioning changes to all planes of each display
> > > + * pipe.
> > > + *
> > > + * Returns: 0 upon success.  This function will never return upon failure
> > > + * since igt_fail() at lower levels will longjmp out of it.
> > > + */
> > > +int igt_display_commit(igt_display_t *display);
> > > +
> > > +/**
> > > + * igt_display_try_commit2:
> > > + * @display: DRM device handle
> > > + * @s: Commit style
> > > + *
> > > + * Attempts to commit framebuffer and positioning changes to all planes of each
> > > + * display pipe.  This function should be used to commit changes that are
> > > + * expected to fail, so that the error code can be checked for correctness.
> > > + * For changes that are expected to succeed, use @igt_display_commit instead.
> > > + *
> > > + * Note that in non-atomic commit styles, no display programming will be
> > > + * performed after the first failure is encountered, so only some of the
> > > + * operations requested by a test may have been completed.  Tests that catch
> > > + * errors returned by this function should take care to restore the display to
> > > + * a sane state after a failure is detected.
> > > + *
> > > + * Returns: 0 upon success, otherwise the error code of the first error
> > > + * encountered.
> > > + */
> > > +int igt_display_try_commit2(igt_display_t *display, enum igt_commit_style s);
> > > +
> > > +int igt_display_get_n_pipes(igt_display_t *display);
> > >  
> > >  const char *igt_output_name(igt_output_t *output);
> > >  drmModeModeInfo *igt_output_get_mode(igt_output_t *output);
> > > +
> > > +/**
> > > + * igt_output_override_mode:
> > > + * @output: Output of which the mode will be overridden
> > > + * @mode: New mode
> > > + *
> > > + * Overrides the output's mode with @mode, so that it is used instead of the
> > > + * mode obtained with get connectors. Note that the mode is used without
> > > + * checking if the output supports it, so this might lead to unexpected results.
> > > + */
> > >  void igt_output_override_mode(igt_output_t *output, drmModeModeInfo *mode);
> > > +
> > >  void igt_output_set_pipe(igt_output_t *output, enum pipe pipe);
> > > +
> > >  igt_plane_t *igt_output_get_plane(igt_output_t *output, enum igt_plane plane);
> > >  
> > >  static inline bool igt_plane_supports_rotation(igt_plane_t *plane)
> > > @@ -256,15 +502,61 @@ static inline bool igt_plane_supports_rotation(igt_plane_t *plane)
> > >  }
> > >  
> > >  void igt_plane_set_fb(igt_plane_t *plane, struct igt_fb *fb);
> > > +
> > >  void igt_plane_set_position(igt_plane_t *plane, int x, int y);
> > > +
> > > +/**
> > > + * igt_plane_set_size:
> > > + * @plane: plane pointer for which size to be set
> > > + * @w: width
> > > + * @h: height
> > > + *
> > > + * This function sets width and height for requested plane.
> > > + * New size will be committed at plane commit time via
> > > + * drmModeSetPlane().
> > > + */
> > >  void igt_plane_set_size(igt_plane_t *plane, int w, int h);
> > > +
> > >  void igt_plane_set_panning(igt_plane_t *plane, int x, int y);
> > > +
> > >  void igt_plane_set_rotation(igt_plane_t *plane, igt_rotation_t rotation);
> > > +
> > > +/**
> > > + * igt_crtc_set_background:
> > > + * @pipe: pipe pointer to which background color to be set
> > > + * @background: background color value in BGR 16bpc
> > > + *
> > > + * Sets background color for requested pipe. Color value provided here
> > > + * will be actually submitted at output commit time via "background_color"
> > > + * property.
> > > + * For example to get red as background, set background = 0x00000000FFFF.
> > > + */
> > >  void igt_crtc_set_background(igt_pipe_t *pipe, uint64_t background);
> > > -void igt_fb_set_position(struct igt_fb *fb, igt_plane_t *plane,
> > > -	uint32_t x, uint32_t y);
> > > -void igt_fb_set_size(struct igt_fb *fb, igt_plane_t *plane,
> > > -	uint32_t w, uint32_t h);
> > > +
> > > +/**
> > > + * igt_fb_set_position:
> > > + * @fb: framebuffer pointer
> > > + * @plane: plane
> > > + * @x: X position
> > > + * @y: Y position
> > > + *
> > > + * This function sets position for requested framebuffer as src to plane.
> > > + * New position will be committed at plane commit time via drmModeSetPlane().
> > > + */
> > > +void igt_fb_set_position(struct igt_fb *fb, igt_plane_t *plane, uint32_t x, uint32_t y);
> > > +
> > > +/**
> > > + * igt_fb_set_size:
> > > + * @fb: framebuffer pointer
> > > + * @plane: plane
> > > + * @w: width
> > > + * @h: height
> > > + *
> > > + * This function sets fetch rect size from requested framebuffer as src
> > > + * to plane. New size will be committed at plane commit time via
> > > + * drmModeSetPlane().
> > > + */
> > > +void igt_fb_set_size(struct igt_fb *fb, igt_plane_t *plane, uint32_t w, uint32_t h);
> > >  
> > >  void igt_wait_for_vblank(int drm_fd, enum pipe pipe);
> > >  
> > > @@ -281,12 +573,62 @@ void igt_wait_for_vblank(int drm_fd, enum pipe pipe);
> > >  
> > >  #define IGT_FIXED(i,f)	((i) << 16 | (f))
> > >  
> > > +/**
> > > + * igt_enable_connectors:
> > > + *
> > > + * Force connectors to be enabled where this is known to work well. Use
> > > + * #igt_reset_connectors to revert the changes.
> > > + *
> > > + * An exit handler is installed to ensure connectors are reset when the test
> > > + * exits.
> > > + */
> > >  void igt_enable_connectors(void);
> > > +
> > > +/**
> > > + * igt_reset_connectors:
> > > + *
> > > + * Remove any forced state from the connectors.
> > > + */
> > >  void igt_reset_connectors(void);
> > >  
> > >  #define EDID_LENGTH 128
> > > -const unsigned char* igt_kms_get_base_edid(void);
> > > -const unsigned char* igt_kms_get_alt_edid(void);
> > > +
> > > +/**
> > > + * igt_kms_get_base_edid:
> > > + *
> > > + * Get the base edid block, which includes the following modes:
> > > + *
> > > + *  - 1920x1080 60Hz
> > > + *  - 1280x720 60Hz
> > > + *  - 1024x768 60Hz
> > > + *  - 800x600 60Hz
> > > + *  - 640x480 60Hz
> > > + *
> > > + * This can be extended with further features using functions such as
> > > + * #kmstest_edid_add_3d.
> > > + *
> > > + * Returns: a basic edid block
> > > + */
> > > +const unsigned char *igt_kms_get_base_edid(void);
> > > +
> > > +/**
> > > + * igt_kms_get_alt_edid:
> > > + *
> > > + * Get an alternate edid block, which includes the following modes:
> > > + *
> > > + *  - 1400x1050 60Hz
> > > + *  - 1920x1080 60Hz
> > > + *  - 1280x720 60Hz
> > > + *  - 1024x768 60Hz
> > > + *  - 800x600 60Hz
> > > + *  - 640x480 60Hz
> > > + *
> > > + * This can be extended with further features using functions such as
> > > + * #kmstest_edid_add_3d.
> > > + *
> > > + * Returns: an alternate edid block
> > > + */
> > > +const unsigned char *igt_kms_get_alt_edid(void);
> > >  
> > >  
> > >  #endif /* __IGT_KMS_H__ */
> > > -- 
> > > 2.6.2
> > > 
> > 
> > -- 
> > Daniel Vetter
> > Software Engineer, Intel Corporation
> > http://blog.ffwll.ch



-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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Re: [PATCH i-g-t 1/3] lib/igt_kms migrate existing documentation to header file.

[Marius Vlad]

[-- Attachment #1.1: Type: text/plain, Size: 47011 bytes --]

On Tue, Dec 22, 2015 at 11:20:19AM +0100, Daniel Vetter wrote:
> On Tue, Dec 22, 2015 at 12:05:10PM +0200, Marius Vlad wrote:
> > Hi,
> > 
> > On Mon, Dec 21, 2015 at 05:09:51PM +0100, Daniel Vetter wrote:
> > > On Mon, Dec 21, 2015 at 01:07:23PM +0200, Marius Vlad wrote:
> > > > Signed-off-by: Marius Vlad <marius.c.vlad@intel.com>
> > > 
> > > Hm, why that? Given that this is against the usual style in igt this needs
> > > some justification, not an empty commit message.
> > 
> > I thought that aggregating all the documentation in one place looks much
> > more cosmetic and easier to go through. Currently it seems rather hectic
> > and disorganized: defines are documented  followed by some vague text
> > surrounding some functions -- although not all files exhibit this
> > behaviour is rather common from I've seen. It was rather easy to add
> > other missing documentation once I had everything in one file. We can
> > also add some lines into CONTRIBUTING so people are aware of it.
> > 
> > Secondly, most of the (user-space) libraries include the documentation
> > in its header file -- hence no (proper) justification for the commit
> > message.
> > 
> > I for one, I'd like to change all of the lib/* files with this approach.
> 
> The idea behind keeping the documentation right next to the implementation
> is that it increases the chances that it gets updated when the function
> interface (or semantics) changes. Only docs for #defines, static inlines
> and structs should be in headers.
> 
> This is the same style as used by kerneldoc, and consistency here is good
> imo.
> 
> I guess for libraries it makes sense to put fully into headers since the
> primary consumer will be external people who only have the headers
> installed. But for both igt and kernel the docs are for project-internal
> use only, so there's no such constraint.

Alright. I'll keep them as is. Thanks for the feedback.

> 
> Given all that I prefer the current style. Also, no one else has
> complained about it yet, so I think it's fine.
> 
> Thanks, Daniel
> 
> > 
> > > 
> > > Thanks, Daniel
> > > 
> > > > ---
> > > >  lib/igt_kms.c | 321 +-------------------------------------
> > > >  lib/igt_kms.h | 486 +++++++++++++++++++++++++++++++++++++++++++++++++---------
> > > >  2 files changed, 418 insertions(+), 389 deletions(-)
> > > > 
> > > > diff --git a/lib/igt_kms.c b/lib/igt_kms.c
> > > > index 5d5a95c..3dc559d 100644
> > > > --- a/lib/igt_kms.c
> > > > +++ b/lib/igt_kms.c
> > > > @@ -88,23 +88,7 @@ static void update_edid_csum(unsigned char *edid)
> > > >  #define EDID_NAME base_edid
> > > >  #include "igt_edid_template.h"
> > > >  
> > > > -/**
> > > > - * igt_kms_get_base_edid:
> > > > - *
> > > > - * Get the base edid block, which includes the following modes:
> > > > - *
> > > > - *  - 1920x1080 60Hz
> > > > - *  - 1280x720 60Hz
> > > > - *  - 1024x768 60Hz
> > > > - *  - 800x600 60Hz
> > > > - *  - 640x480 60Hz
> > > > - *
> > > > - * This can be extended with further features using functions such as
> > > > - * #kmstest_edid_add_3d.
> > > > - *
> > > > - * Returns: a basic edid block
> > > > - */
> > > > -const unsigned char* igt_kms_get_base_edid(void)
> > > > +const unsigned char *igt_kms_get_base_edid(void)
> > > >  {
> > > >  	update_edid_csum(base_edid);
> > > >  
> > > > @@ -128,59 +112,13 @@ const unsigned char* igt_kms_get_base_edid(void)
> > > >  #define EDID_NAME alt_edid
> > > >  #include "igt_edid_template.h"
> > > >  
> > > > -/**
> > > > - * igt_kms_get_alt_edid:
> > > > - *
> > > > - * Get an alternate edid block, which includes the following modes:
> > > > - *
> > > > - *  - 1400x1050 60Hz
> > > > - *  - 1920x1080 60Hz
> > > > - *  - 1280x720 60Hz
> > > > - *  - 1024x768 60Hz
> > > > - *  - 800x600 60Hz
> > > > - *  - 640x480 60Hz
> > > > - *
> > > > - * This can be extended with further features using functions such as
> > > > - * #kmstest_edid_add_3d.
> > > > - *
> > > > - * Returns: an alternate edid block
> > > > - */
> > > > -const unsigned char* igt_kms_get_alt_edid(void)
> > > > +const unsigned char *igt_kms_get_alt_edid(void)
> > > >  {
> > > >  	update_edid_csum(alt_edid);
> > > >  
> > > >  	return alt_edid;
> > > >  }
> > > >  
> > > > -/**
> > > > - * SECTION:igt_kms
> > > > - * @short_description: Kernel modesetting support library
> > > > - * @title: KMS
> > > > - * @include: igt.h
> > > > - *
> > > > - * This library provides support to enumerate and set modeset configurations.
> > > > - *
> > > > - * There are two parts in this library: First the low level helper function
> > > > - * which directly build on top of raw ioctls or the interfaces provided by
> > > > - * libdrm. Those functions all have a kmstest_ prefix.
> > > > - *
> > > > - * The second part is a high-level library to manage modeset configurations
> > > > - * which abstracts away some of the low-level details like the difference
> > > > - * between legacy and universal plane support for setting cursors or in the
> > > > - * future the difference between legacy and atomic commit. These high-level
> > > > - * functions have all igt_ prefixes. This part is still very much work in
> > > > - * progress and so also lacks a bit documentation for the individual functions.
> > > > - *
> > > > - * Note that this library's header pulls in the [i-g-t framebuffer](intel-gpu-tools-i-g-t-framebuffer.html)
> > > > - * library as a dependency.
> > > > - */
> > > > -
> > > > -/**
> > > > - * kmstest_pipe_name:
> > > > - * @pipe: display pipe
> > > > - *
> > > > - * Returns: String represnting @pipe, e.g. "A".
> > > > - */
> > > >  const char *kmstest_pipe_name(enum pipe pipe)
> > > >  {
> > > >  	const char *str[] = { "A", "B", "C" };
> > > > @@ -191,12 +129,6 @@ const char *kmstest_pipe_name(enum pipe pipe)
> > > >  	return str[pipe];
> > > >  }
> > > >  
> > > > -/**
> > > > - * kmstest_plane_name:
> > > > - * @plane: display plane
> > > > - *
> > > > - * Returns: String represnting @pipe, e.g. "plane1".
> > > > - */
> > > >  const char *kmstest_plane_name(enum igt_plane plane)
> > > >  {
> > > >  	static const char *names[] = {
> > > > @@ -235,12 +167,6 @@ static const char *mode_stereo_name(const drmModeModeInfo *mode)
> > > >  	}
> > > >  }
> > > >  
> > > > -/**
> > > > - * kmstest_dump_mode:
> > > > - * @mode: libdrm mode structure
> > > > - *
> > > > - * Prints @mode to stdout in a huma-readable form.
> > > > - */
> > > >  void kmstest_dump_mode(drmModeModeInfo *mode)
> > > >  {
> > > >  	const char *stereo = mode_stereo_name(mode);
> > > > @@ -256,14 +182,6 @@ void kmstest_dump_mode(drmModeModeInfo *mode)
> > > >  		 stereo ? stereo : "", stereo ? ")" : "");
> > > >  }
> > > >  
> > > > -/**
> > > > - * kmstest_get_pipe_from_crtc_id:
> > > > - * @fd: DRM fd
> > > > - * @crtc_id: DRM CRTC id
> > > > - *
> > > > - * Returns: The pipe number for the given DRM CRTC @crtc_id. This maps directly
> > > > - * to an enum pipe value used in other helper functions.
> > > > - */
> > > >  int kmstest_get_pipe_from_crtc_id(int fd, int crtc_id)
> > > >  {
> > > >  	struct drm_i915_get_pipe_from_crtc_id pfci;
> > > > @@ -317,11 +235,6 @@ err:
> > > >  
> > > >  static unsigned long orig_vt_mode = -1UL;
> > > >  
> > > > -/**
> > > > - * kmstest_restore_vt_mode:
> > > > - *
> > > > - * Restore the VT mode in use before #kmstest_set_vt_graphics_mode was called.
> > > > - */
> > > >  void kmstest_restore_vt_mode(void)
> > > >  {
> > > >  	long ret;
> > > > @@ -335,16 +248,6 @@ void kmstest_restore_vt_mode(void)
> > > >  	}
> > > >  }
> > > >  
> > > > -/**
> > > > - * kmstest_set_vt_graphics_mode:
> > > > - *
> > > > - * Sets the controlling VT (if available) into graphics/raw mode and installs
> > > > - * an igt exit handler to set the VT back to text mode on exit. Use
> > > > - * #kmstest_restore_vt_mode to restore the previous VT mode manually.
> > > > - *
> > > > - * All kms tests must call this function to make sure that the fbcon doesn't
> > > > - * interfere by e.g. blanking the screen.
> > > > - */
> > > >  void kmstest_set_vt_graphics_mode(void)
> > > >  {
> > > >  	long ret;
> > > > @@ -367,16 +270,6 @@ static void reset_connectors_at_exit(int sig)
> > > >  	igt_reset_connectors();
> > > >  }
> > > >  
> > > > -/**
> > > > - * kmstest_force_connector:
> > > > - * @fd: drm file descriptor
> > > > - * @connector: connector
> > > > - * @state: state to force on @connector
> > > > - *
> > > > - * Force the specified state on the specified connector.
> > > > - *
> > > > - * Returns: true on success
> > > > - */
> > > >  bool kmstest_force_connector(int drm_fd, drmModeConnector *connector,
> > > >  			     enum kmstest_force_connector_state state)
> > > >  {
> > > > @@ -459,18 +352,6 @@ bool kmstest_force_connector(int drm_fd, drmModeConnector *connector,
> > > >  	return (ret == -1) ? false : true;
> > > >  }
> > > >  
> > > > -/**
> > > > - * kmstest_force_edid:
> > > > - * @drm_fd: drm file descriptor
> > > > - * @connector: connector to set @edid on
> > > > - * @edid: An EDID data block
> > > > - * @length: length of the EDID data. #EDID_LENGTH defines the standard EDID
> > > > - * length
> > > > - *
> > > > - * Set the EDID data on @connector to @edid. See also #igt_kms_get_base_edid.
> > > > - *
> > > > - * If @length is zero, the forced EDID will be removed.
> > > > - */
> > > >  void kmstest_force_edid(int drm_fd, drmModeConnector *connector,
> > > >  			const unsigned char *edid, size_t length)
> > > >  {
> > > > @@ -499,16 +380,6 @@ void kmstest_force_edid(int drm_fd, drmModeConnector *connector,
> > > >  	igt_assert(ret != -1);
> > > >  }
> > > >  
> > > > -/**
> > > > - * kmstest_get_connector_default_mode:
> > > > - * @drm_fd: DRM fd
> > > > - * @connector: libdrm connector
> > > > - * @mode: libdrm mode
> > > > - *
> > > > - * Retrieves the default mode for @connector and stores it in @mode.
> > > > - *
> > > > - * Returns: true on success, false on failure
> > > > - */
> > > >  bool kmstest_get_connector_default_mode(int drm_fd, drmModeConnector *connector,
> > > >  					drmModeModeInfo *mode)
> > > >  {
> > > > @@ -532,16 +403,6 @@ bool kmstest_get_connector_default_mode(int drm_fd, drmModeConnector *connector,
> > > >  	return true;
> > > >  }
> > > >  
> > > > -/**
> > > > - * kmstest_get_connector_config:
> > > > - * @drm_fd: DRM fd
> > > > - * @connector_id: DRM connector id
> > > > - * @crtc_idx_mask: mask of allowed DRM CRTC indices
> > > > - * @config: structure filled with the possible configuration
> > > > - *
> > > > - * This tries to find a suitable configuration for the given connector and CRTC
> > > > - * constraint and fills it into @config.
> > > > - */
> > > >  bool kmstest_get_connector_config(int drm_fd, uint32_t connector_id,
> > > >  				  unsigned long crtc_idx_mask,
> > > >  				  struct kmstest_connector_config *config)
> > > > @@ -633,12 +494,6 @@ err1:
> > > >  	return false;
> > > >  }
> > > >  
> > > > -/**
> > > > - * kmstest_free_connector_config:
> > > > - * @config: connector configuration structure
> > > > - *
> > > > - * Free any resources in @config allocated in kmstest_get_connector_config().
> > > > - */
> > > >  void kmstest_free_connector_config(struct kmstest_connector_config *config)
> > > >  {
> > > >  	drmModeFreeCrtc(config->crtc);
> > > > @@ -646,14 +501,6 @@ void kmstest_free_connector_config(struct kmstest_connector_config *config)
> > > >  	drmModeFreeConnector(config->connector);
> > > >  }
> > > >  
> > > > -/**
> > > > - * kmstest_set_connector_dpms:
> > > > - * @fd: DRM fd
> > > > - * @connector: libdrm connector
> > > > - * @mode: DRM DPMS value
> > > > - *
> > > > - * This function sets the DPMS setting of @connector to @mode.
> > > > - */
> > > >  void kmstest_set_connector_dpms(int fd, drmModeConnector *connector, int mode)
> > > >  {
> > > >  	int i, dpms = 0;
> > > > @@ -682,21 +529,6 @@ void kmstest_set_connector_dpms(int fd, drmModeConnector *connector, int mode)
> > > >  					       dpms, mode) == 0);
> > > >  }
> > > >  
> > > > -/**
> > > > - * kmstest_get_property:
> > > > - * @drm_fd: drm file descriptor
> > > > - * @object_id: object whose properties we're going to get
> > > > - * @object_type: type of obj_id (DRM_MODE_OBJECT_*)
> > > > - * @name: name of the property we're going to get
> > > > - * @prop_id: if not NULL, returns the property id
> > > > - * @value: if not NULL, returns the property value
> > > > - * @prop: if not NULL, returns the property, and the caller will have to free
> > > > - *        it manually.
> > > > - *
> > > > - * Finds a property with the given name on the given object.
> > > > - *
> > > > - * Returns: true in case we found something.
> > > > - */
> > > >  bool
> > > >  kmstest_get_property(int drm_fd, uint32_t object_id, uint32_t object_type,
> > > >  		     const char *name, uint32_t *prop_id /* out */,
> > > > @@ -734,16 +566,6 @@ kmstest_get_property(int drm_fd, uint32_t object_id, uint32_t object_type,
> > > >  	return found;
> > > >  }
> > > >  
> > > > -/**
> > > > - * kmstest_edid_add_3d:
> > > > - * @edid: an existing valid edid block
> > > > - * @length: length of @edid
> > > > - * @new_edid_ptr: pointer to where the new edid will be placed
> > > > - * @new_length: pointer to the size of the new edid
> > > > - *
> > > > - * Makes a copy of an existing edid block and adds an extension indicating
> > > > - * stereo 3D capabilities.
> > > > - */
> > > >  void kmstest_edid_add_3d(const unsigned char *edid, size_t length,
> > > >  			 unsigned char *new_edid_ptr[], size_t *new_length)
> > > >  {
> > > > @@ -814,13 +636,6 @@ void kmstest_edid_add_3d(const unsigned char *edid, size_t length,
> > > >  	new_edid[length + 127] = 256 - sum;
> > > >  }
> > > >  
> > > > -/**
> > > > - * kmstest_unset_all_crtcs:
> > > > - * @drm_fd: the DRM fd
> > > > - * @resources: libdrm resources pointer
> > > > - *
> > > > - * Disables all the screens.
> > > > - */
> > > >  void kmstest_unset_all_crtcs(int drm_fd, drmModeResPtr resources)
> > > >  {
> > > >  	int i, rc;
> > > > @@ -964,15 +779,6 @@ static int get_drm_plane_type(int drm_fd, uint32_t plane_id)
> > > >  	return DRM_PLANE_TYPE_OVERLAY;
> > > >  }
> > > >  
> > > > -/**
> > > > - * igt_display_init:
> > > > - * @display: a pointer to an #igt_display_t structure
> > > > - * @drm_fd: a drm file descriptor
> > > > - *
> > > > - * Initialize @display and allocate the various resources required. Use
> > > > - * #igt_display_fini to release the resources when they are no longer required.
> > > > - *
> > > > - */
> > > >  void igt_display_init(igt_display_t *display, int drm_fd)
> > > >  {
> > > >  	drmModeRes *resources;
> > > > @@ -1171,13 +977,6 @@ static void igt_output_fini(igt_output_t *output)
> > > >  	free(output->name);
> > > >  }
> > > >  
> > > > -/**
> > > > - * igt_display_fini:
> > > > - * @display: a pointer to an #igt_display_t structure
> > > > - *
> > > > - * Release any resources associated with @display. This does not free @display
> > > > - * itself.
> > > > - */
> > > >  void igt_display_fini(igt_display_t *display)
> > > >  {
> > > >  	int i;
> > > > @@ -1648,24 +1447,6 @@ static int do_display_commit(igt_display_t *display,
> > > >  	return 0;
> > > >  }
> > > >  
> > > > -/**
> > > > - * igt_display_commit2:
> > > > - * @display: DRM device handle
> > > > - * @s: Commit style
> > > > - *
> > > > - * Commits framebuffer and positioning changes to all planes of each display
> > > > - * pipe, using a specific API to perform the programming.  This function should
> > > > - * be used to exercise a specific driver programming API; igt_display_commit
> > > > - * should be used instead if the API used is unimportant to the test being run.
> > > > - *
> > > > - * This function should only be used to commit changes that are expected to
> > > > - * succeed, since any failure during the commit process will cause the IGT
> > > > - * subtest to fail.  To commit changes that are expected to fail, use
> > > > - * @igt_try_display_commit2 instead.
> > > > - *
> > > > - * Returns: 0 upon success.  This function will never return upon failure
> > > > - * since igt_fail() at lower levels will longjmp out of it.
> > > > - */
> > > >  int igt_display_commit2(igt_display_t *display,
> > > >  		       enum igt_commit_style s)
> > > >  {
> > > > @@ -1674,40 +1455,11 @@ int igt_display_commit2(igt_display_t *display,
> > > >  	return 0;
> > > >  }
> > > >  
> > > > -/**
> > > > - * igt_display_try_commit2:
> > > > - * @display: DRM device handle
> > > > - * @s: Commit style
> > > > - *
> > > > - * Attempts to commit framebuffer and positioning changes to all planes of each
> > > > - * display pipe.  This function should be used to commit changes that are
> > > > - * expected to fail, so that the error code can be checked for correctness.
> > > > - * For changes that are expected to succeed, use @igt_display_commit instead.
> > > > - *
> > > > - * Note that in non-atomic commit styles, no display programming will be
> > > > - * performed after the first failure is encountered, so only some of the
> > > > - * operations requested by a test may have been completed.  Tests that catch
> > > > - * errors returned by this function should take care to restore the display to
> > > > - * a sane state after a failure is detected.
> > > > - *
> > > > - * Returns: 0 upon success, otherwise the error code of the first error
> > > > - * encountered.
> > > > - */
> > > >  int igt_display_try_commit2(igt_display_t *display, enum igt_commit_style s)
> > > >  {
> > > >  	return do_display_commit(display, s, false);
> > > >  }
> > > >  
> > > > -/**
> > > > - * igt_display_commit:
> > > > - * @display: DRM device handle
> > > > - *
> > > > - * Commits framebuffer and positioning changes to all planes of each display
> > > > - * pipe.
> > > > - *
> > > > - * Returns: 0 upon success.  This function will never return upon failure
> > > > - * since igt_fail() at lower levels will longjmp out of it.
> > > > - */
> > > >  int igt_display_commit(igt_display_t *display)
> > > >  {
> > > >  	return igt_display_commit2(display, COMMIT_LEGACY);
> > > > @@ -1723,15 +1475,6 @@ drmModeModeInfo *igt_output_get_mode(igt_output_t *output)
> > > >  	return &output->config.default_mode;
> > > >  }
> > > >  
> > > > -/**
> > > > - * igt_output_override_mode:
> > > > - * @output: Output of which the mode will be overridden
> > > > - * @mode: New mode
> > > > - *
> > > > - * Overrides the output's mode with @mode, so that it is used instead of the
> > > > - * mode obtained with get connectors. Note that the mode is used without
> > > > - * checking if the output supports it, so this might lead to unexpected results.
> > > > - */
> > > >  void igt_output_override_mode(igt_output_t *output, drmModeModeInfo *mode)
> > > >  {
> > > >  	output->override_mode = *mode;
> > > > @@ -1803,16 +1546,6 @@ void igt_plane_set_position(igt_plane_t *plane, int x, int y)
> > > >  	plane->position_changed = true;
> > > >  }
> > > >  
> > > > -/**
> > > > - * igt_plane_set_size:
> > > > - * @plane: plane pointer for which size to be set
> > > > - * @w: width
> > > > - * @h: height
> > > > - *
> > > > - * This function sets width and height for requested plane.
> > > > - * New size will be committed at plane commit time via
> > > > - * drmModeSetPlane().
> > > > - */
> > > >  void igt_plane_set_size(igt_plane_t *plane, int w, int h)
> > > >  {
> > > >  	igt_pipe_t *pipe = plane->pipe;
> > > > @@ -1827,16 +1560,6 @@ void igt_plane_set_size(igt_plane_t *plane, int w, int h)
> > > >  	plane->size_changed = true;
> > > >  }
> > > >  
> > > > -/**
> > > > - * igt_fb_set_position:
> > > > - * @fb: framebuffer pointer
> > > > - * @plane: plane
> > > > - * @x: X position
> > > > - * @y: Y position
> > > > - *
> > > > - * This function sets position for requested framebuffer as src to plane.
> > > > - * New position will be committed at plane commit time via drmModeSetPlane().
> > > > - */
> > > >  void igt_fb_set_position(struct igt_fb *fb, igt_plane_t *plane,
> > > >  	uint32_t x, uint32_t y)
> > > >  {
> > > > @@ -1852,17 +1575,6 @@ void igt_fb_set_position(struct igt_fb *fb, igt_plane_t *plane,
> > > >  	plane->fb_changed = true;
> > > >  }
> > > >  
> > > > -/**
> > > > - * igt_fb_set_size:
> > > > - * @fb: framebuffer pointer
> > > > - * @plane: plane
> > > > - * @w: width
> > > > - * @h: height
> > > > - *
> > > > - * This function sets fetch rect size from requested framebuffer as src
> > > > - * to plane. New size will be committed at plane commit time via
> > > > - * drmModeSetPlane().
> > > > - */
> > > >  void igt_fb_set_size(struct igt_fb *fb, igt_plane_t *plane,
> > > >  	uint32_t w, uint32_t h)
> > > >  {
> > > > @@ -1923,16 +1635,6 @@ void igt_plane_set_rotation(igt_plane_t *plane, igt_rotation_t rotation)
> > > >  	plane->rotation_changed = true;
> > > >  }
> > > >  
> > > > -/**
> > > > - * igt_crtc_set_background:
> > > > - * @pipe: pipe pointer to which background color to be set
> > > > - * @background: background color value in BGR 16bpc
> > > > - *
> > > > - * Sets background color for requested pipe. Color value provided here
> > > > - * will be actually submitted at output commit time via "background_color"
> > > > - * property.
> > > > - * For example to get red as background, set background = 0x00000000FFFF.
> > > > - */
> > > >  void igt_crtc_set_background(igt_pipe_t *pipe, uint64_t background)
> > > >  {
> > > >  	igt_display_t *display = pipe->display;
> > > > @@ -1946,7 +1648,6 @@ void igt_crtc_set_background(igt_pipe_t *pipe, uint64_t background)
> > > >  	pipe->background_changed = true;
> > > >  }
> > > >  
> > > > -
> > > >  void igt_wait_for_vblank(int drm_fd, enum pipe pipe)
> > > >  {
> > > >  	drmVBlank wait_vbl;
> > > > @@ -1960,15 +1661,6 @@ void igt_wait_for_vblank(int drm_fd, enum pipe pipe)
> > > >  	igt_assert(drmWaitVBlank(drm_fd, &wait_vbl) == 0);
> > > >  }
> > > >  
> > > > -/**
> > > > - * igt_enable_connectors:
> > > > - *
> > > > - * Force connectors to be enabled where this is known to work well. Use
> > > > - * #igt_reset_connectors to revert the changes.
> > > > - *
> > > > - * An exit handler is installed to ensure connectors are reset when the test
> > > > - * exits.
> > > > - */
> > > >  void igt_enable_connectors(void)
> > > >  {
> > > >  	drmModeRes *res;
> > > > @@ -1983,8 +1675,8 @@ void igt_enable_connectors(void)
> > > >  
> > > >  		c = drmModeGetConnectorCurrent(drm_fd, res->connectors[i]);
> > > >  
> > > > -		/* don't attempt to force connectors that are already connected
> > > > -		 */
> > > > +		/* don't attempt to force connectors that
> > > > +		 * are already connected */
> > > >  		if (c->connection == DRM_MODE_CONNECTED)
> > > >  			continue;
> > > >  
> > > > @@ -2001,11 +1693,6 @@ void igt_enable_connectors(void)
> > > >  	close(drm_fd);
> > > >  }
> > > >  
> > > > -/**
> > > > - * igt_reset_connectors:
> > > > - *
> > > > - * Remove any forced state from the connectors.
> > > > - */
> > > >  void igt_reset_connectors(void)
> > > >  {
> > > >  	char **tmp;
> > > > diff --git a/lib/igt_kms.h b/lib/igt_kms.h
> > > > index 94f315f..2cc8a3b 100644
> > > > --- a/lib/igt_kms.h
> > > > +++ b/lib/igt_kms.h
> > > > @@ -25,6 +25,30 @@
> > > >   * 	Damien Lespiau <damien.lespiau@intel.com>
> > > >   */
> > > >  
> > > > +/**
> > > > + * SECTION:igt_kms
> > > > + * @short_description: Kernel modesetting support library
> > > > + * @title: KMS
> > > > + * @include: igt.h
> > > > + *
> > > > + * This library provides support to enumerate and set modeset configurations.
> > > > + *
> > > > + * There are two parts in this library: First the low level helper function
> > > > + * which directly build on top of raw ioctls or the interfaces provided by
> > > > + * libdrm. Those functions all have a kmstest_ prefix.
> > > > + *
> > > > + * The second part is a high-level library to manage modeset configurations
> > > > + * which abstracts away some of the low-level details like the difference
> > > > + * between legacy and universal plane support for setting cursors or in the
> > > > + * future the difference between legacy and atomic commit. These high-level
> > > > + * functions have all igt_ prefixes. This part is still very much work in
> > > > + * progress and so also lacks a bit documentation for the individual functions.
> > > > + *
> > > > + * Note that this library's header pulls in the [i-g-t
> > > > + * framebuffer](intel-gpu-tools-Framebuffer.html) library as a
> > > > + * dependency.
> > > > + */
> > > > +
> > > >  #ifndef __IGT_KMS_H__
> > > >  #define __IGT_KMS_H__
> > > >  
> > > > @@ -37,7 +61,6 @@
> > > >  #include "igt_fb.h"
> > > >  #include "ioctl_wrappers.h"
> > > >  
> > > > -/* Low-level helpers with kmstest_ prefix */
> > > >  
> > > >  enum pipe {
> > > >          PIPE_ANY = -1,
> > > > @@ -46,7 +69,6 @@ enum pipe {
> > > >          PIPE_C,
> > > >          I915_MAX_PIPES
> > > >  };
> > > > -const char *kmstest_pipe_name(enum pipe pipe);
> > > >  
> > > >  /* We namespace this enum to not conflict with the Android i915_drm.h */
> > > >  enum igt_plane {
> > > > @@ -57,8 +79,6 @@ enum igt_plane {
> > > >          IGT_PLANE_CURSOR,
> > > >  };
> > > >  
> > > > -const char *kmstest_plane_name(enum igt_plane plane);
> > > > -
> > > >  enum port {
> > > >          PORT_A = 0,
> > > >          PORT_B,
> > > > @@ -68,44 +88,6 @@ enum port {
> > > >          I915_MAX_PORTS
> > > >  };
> > > >  
> > > > -/**
> > > > - * kmstest_port_name:
> > > > - * @port: display plane
> > > > - *
> > > > - * Returns: String representing @port, e.g. "A".
> > > > - */
> > > > -#define kmstest_port_name(port) ((port) + 'A')
> > > > -
> > > > -/**
> > > > - * kmstest_encoder_type_str:
> > > > - * @type: DRM_MODE_ENCODER_* enumeration value
> > > > - *
> > > > - * Returns: A string representing the drm encoder @type.
> > > > - */
> > > > -const char *kmstest_encoder_type_str(int type);
> > > > -
> > > > -/**
> > > > - * kmstest_connector_status_str:
> > > > - * @status: DRM_MODE_* connector status value
> > > > - *
> > > > - * Returns: A string representing the drm connector status @status.
> > > > - */
> > > > -const char *kmstest_connector_status_str(int status);
> > > > -
> > > > -/**
> > > > - * kmstest_connector_type_str:
> > > > - * @type: DRM_MODE_CONNECTOR_* enumeration value
> > > > - *
> > > > - * Returns: A string representing the drm connector @type.
> > > > - */
> > > > -const char *kmstest_connector_type_str(int type);
> > > > -
> > > > -void kmstest_dump_mode(drmModeModeInfo *mode);
> > > > -
> > > > -int kmstest_get_pipe_from_crtc_id(int fd, int crtc_id);
> > > > -void kmstest_set_vt_graphics_mode(void);
> > > > -void kmstest_restore_vt_mode(void);
> > > > -
> > > >  struct kmstest_connector_config {
> > > >  	drmModeCrtc *crtc;
> > > >  	drmModeConnector *connector;
> > > > @@ -129,25 +111,6 @@ enum kmstest_force_connector_state {
> > > >  	FORCE_CONNECTOR_OFF
> > > >  };
> > > >  
> > > > -bool kmstest_force_connector(int fd, drmModeConnector *connector,
> > > > -			     enum kmstest_force_connector_state state);
> > > > -void kmstest_edid_add_3d(const unsigned char *edid, size_t length, unsigned char *new_edid_ptr[], size_t *new_length);
> > > > -void kmstest_force_edid(int drm_fd, drmModeConnector *connector,
> > > > -			const unsigned char *edid, size_t length);
> > > > -
> > > > -bool kmstest_get_connector_default_mode(int drm_fd, drmModeConnector *connector,
> > > > -					drmModeModeInfo *mode);
> > > > -bool kmstest_get_connector_config(int drm_fd, uint32_t connector_id,
> > > > -				  unsigned long crtc_idx_mask,
> > > > -				  struct kmstest_connector_config *config);
> > > > -void kmstest_free_connector_config(struct kmstest_connector_config *config);
> > > > -
> > > > -void kmstest_set_connector_dpms(int fd, drmModeConnector *connector, int mode);
> > > > -bool kmstest_get_property(int drm_fd, uint32_t object_id, uint32_t object_type,
> > > > -			  const char *name, uint32_t *prop_id, uint64_t *value,
> > > > -			  drmModePropertyPtr *prop);
> > > > -void kmstest_unset_all_crtcs(int drm_fd, drmModeResPtr resources);
> > > > -
> > > >  /*
> > > >   * A small modeset API
> > > >   */
> > > > @@ -160,8 +123,8 @@ enum igt_commit_style {
> > > >  };
> > > >  
> > > >  typedef struct igt_display igt_display_t;
> > > > -typedef struct igt_pipe igt_pipe_t;
> > > >  typedef uint32_t igt_fixed_t;			/* 16.16 fixed point */
> > > > +typedef struct igt_pipe igt_pipe_t;
> > > >  
> > > >  typedef enum {
> > > >  	/* this maps to the kernel API */
> > > > @@ -237,17 +200,300 @@ struct igt_display {
> > > >  	bool has_universal_planes;
> > > >  };
> > > >  
> > > > +/* Low-level helpers with kmstest_ prefix */
> > > > +
> > > > +/**
> > > > + * kmstest_port_name:
> > > > + * @port: display plane
> > > > + *
> > > > + * Returns: String representing @port, e.g. "A".
> > > > + */
> > > > +#define kmstest_port_name(port) ((port) + 'A')
> > > > +
> > > > +/**
> > > > + * kmstest_pipe_name:
> > > > + * @pipe: display pipe
> > > > + *
> > > > + * Returns: String represnting @pipe, e.g. "A".
> > > > + */
> > > > +const char *kmstest_pipe_name(enum pipe pipe);
> > > > +
> > > > +/**
> > > > + * kmstest_plane_name:
> > > > + * @plane: display plane
> > > > + *
> > > > + * Returns: String represnting @pipe, e.g. "plane1".
> > > > + */
> > > > +const char *kmstest_plane_name(enum igt_plane plane);
> > > > +
> > > > +
> > > > +/**
> > > > + * kmstest_encoder_type_str:
> > > > + * @type: DRM_MODE_ENCODER_* enumeration value
> > > > + *
> > > > + * Returns: A string representing the drm encoder @type.
> > > > + */
> > > > +const char *kmstest_encoder_type_str(int type);
> > > > +
> > > > +/**
> > > > + * kmstest_connector_status_str:
> > > > + * @status: DRM_MODE_* connector status value
> > > > + *
> > > > + * Returns: A string representing the drm connector status @status.
> > > > + */
> > > > +const char *kmstest_connector_status_str(int status);
> > > > +
> > > > +/**
> > > > + * kmstest_connector_type_str:
> > > > + * @type: DRM_MODE_CONNECTOR_* enumeration value
> > > > + *
> > > > + * Returns: A string representing the drm connector @type.
> > > > + */
> > > > +const char *kmstest_connector_type_str(int type);
> > > > +
> > > > +/**
> > > > + * kmstest_dump_mode:
> > > > + * @mode: libdrm mode structure
> > > > + *
> > > > + * Prints @mode to stdout in a huma-readable form.
> > > > + */
> > > > +void kmstest_dump_mode(drmModeModeInfo *mode);
> > > > +
> > > > +/**
> > > > + * kmstest_get_pipe_from_crtc_id:
> > > > + * @fd: DRM fd
> > > > + * @crtc_id: DRM CRTC id
> > > > + *
> > > > + * Returns: The pipe number for the given DRM CRTC @crtc_id. This maps directly
> > > > + * to an enum pipe value used in other helper functions.
> > > > + */
> > > > +int kmstest_get_pipe_from_crtc_id(int fd, int crtc_id);
> > > > +
> > > > +/**
> > > > + * kmstest_set_vt_graphics_mode:
> > > > + *
> > > > + * Sets the controlling VT (if available) into graphics/raw mode and installs
> > > > + * an igt exit handler to set the VT back to text mode on exit. Use
> > > > + * #kmstest_restore_vt_mode to restore the previous VT mode manually.
> > > > + *
> > > > + * All kms tests must call this function to make sure that the fbcon doesn't
> > > > + * interfere by e.g. blanking the screen.
> > > > + */
> > > > +void kmstest_set_vt_graphics_mode(void);
> > > > +
> > > > +/**
> > > > + * kmstest_restore_vt_mode:
> > > > + *
> > > > + * Restore the VT mode in use before #kmstest_set_vt_graphics_mode was called.
> > > > + */
> > > > +void kmstest_restore_vt_mode(void);
> > > > +
> > > > +/**
> > > > + * kmstest_force_connector:
> > > > + * @fd: drm file descriptor
> > > > + * @connector: connector
> > > > + * @state: state to force on @connector
> > > > + *
> > > > + * Force the specified state on the specified connector.
> > > > + *
> > > > + * Returns: true on success
> > > > + */
> > > > +bool kmstest_force_connector(int fd, drmModeConnector *connector,
> > > > +			     enum kmstest_force_connector_state state);
> > > > +
> > > > +/**
> > > > + * kmstest_edid_add_3d:
> > > > + * @edid: an existing valid edid block
> > > > + * @length: length of @edid
> > > > + * @new_edid_ptr: pointer to where the new edid will be placed
> > > > + * @new_length: pointer to the size of the new edid
> > > > + *
> > > > + * Makes a copy of an existing edid block and adds an extension indicating
> > > > + * stereo 3D capabilities.
> > > > + */
> > > > +void kmstest_edid_add_3d(const unsigned char *edid, size_t length,
> > > > +			 unsigned char *new_edid_ptr[], size_t *new_length);
> > > > +
> > > > +/**
> > > > + * kmstest_force_edid:
> > > > + * @drm_fd: drm file descriptor
> > > > + * @connector: connector to set @edid on
> > > > + * @edid: An EDID data block
> > > > + * @length: length of the EDID data. #EDID_LENGTH defines the standard EDID
> > > > + * length
> > > > + *
> > > > + * Set the EDID data on @connector to @edid. See also #igt_kms_get_base_edid.
> > > > + *
> > > > + * If @length is zero, the forced EDID will be removed.
> > > > + */
> > > > +void kmstest_force_edid(int drm_fd, drmModeConnector *connector,
> > > > +			const unsigned char *edid, size_t length);
> > > > +
> > > > +/**
> > > > + * kmstest_get_connector_default_mode:
> > > > + * @drm_fd: DRM fd
> > > > + * @connector: libdrm connector
> > > > + * @mode: libdrm mode
> > > > + *
> > > > + * Retrieves the default mode for @connector and stores it in @mode.
> > > > + *
> > > > + * Returns: true on success, false on failure
> > > > + */
> > > > +bool kmstest_get_connector_default_mode(int drm_fd, drmModeConnector *connector,
> > > > +					drmModeModeInfo *mode);
> > > > +
> > > > +/**
> > > > + * kmstest_get_connector_config:
> > > > + * @drm_fd: DRM fd
> > > > + * @connector_id: DRM connector id
> > > > + * @crtc_idx_mask: mask of allowed DRM CRTC indices
> > > > + * @config: structure filled with the possible configuration
> > > > + *
> > > > + * This tries to find a suitable configuration for the given connector and CRTC
> > > > + * constraint and fills it into @config.
> > > > + */
> > > > +bool kmstest_get_connector_config(int drm_fd, uint32_t connector_id,
> > > > +				  unsigned long crtc_idx_mask,
> > > > +				  struct kmstest_connector_config *config);
> > > > +
> > > > +/**
> > > > + * kmstest_free_connector_config:
> > > > + * @config: connector configuration structure
> > > > + *
> > > > + * Free any resources in @config allocated in kmstest_get_connector_config().
> > > > + */
> > > > +void kmstest_free_connector_config(struct kmstest_connector_config *config);
> > > > +
> > > > +/**
> > > > + * kmstest_set_connector_dpms:
> > > > + * @fd: DRM fd
> > > > + * @connector: libdrm connector
> > > > + * @mode: DRM DPMS value
> > > > + *
> > > > + * This function sets the DPMS setting of @connector to @mode.
> > > > + */
> > > > +void kmstest_set_connector_dpms(int fd, drmModeConnector *connector, int mode);
> > > > +
> > > > +/**
> > > > + * kmstest_get_property:
> > > > + * @drm_fd: drm file descriptor
> > > > + * @object_id: object whose properties we're going to get
> > > > + * @object_type: type of obj_id (DRM_MODE_OBJECT_*)
> > > > + * @name: name of the property we're going to get
> > > > + * @prop_id: if not NULL, returns the property id
> > > > + * @value: if not NULL, returns the property value
> > > > + * @prop: if not NULL, returns the property, and the caller will have to free
> > > > + *        it manually.
> > > > + *
> > > > + * Finds a property with the given name on the given object.
> > > > + *
> > > > + * Returns: true in case we found something.
> > > > + */
> > > > +bool kmstest_get_property(int drm_fd, uint32_t object_id, uint32_t object_type,
> > > > +			  const char *name, uint32_t *prop_id, uint64_t *value,
> > > > +			  drmModePropertyPtr *prop);
> > > > +
> > > > +/**
> > > > + * kmstest_unset_all_crtcs:
> > > > + * @drm_fd: the DRM fd
> > > > + * @resources: libdrm resources pointer
> > > > + *
> > > > + * Disables all the screens.
> > > > + */
> > > > +void kmstest_unset_all_crtcs(int drm_fd, drmModeResPtr resources);
> > > > +
> > > > +
> > > > +/**
> > > > + * igt_display_init:
> > > > + * @display: a pointer to an #igt_display_t structure
> > > > + * @drm_fd: a drm file descriptor
> > > > + *
> > > > + * Initialize @display and allocate the various resources required. Use
> > > > + * #igt_display_fini to release the resources when they are no longer required.
> > > > + *
> > > > + */
> > > >  void igt_display_init(igt_display_t *display, int drm_fd);
> > > > +
> > > > +/**
> > > > + * igt_display_fini:
> > > > + * @display: a pointer to an #igt_display_t structure
> > > > + *
> > > > + * Release any resources associated with @display. This does not free @display
> > > > + * itself.
> > > > + */
> > > >  void igt_display_fini(igt_display_t *display);
> > > > -int  igt_display_commit2(igt_display_t *display, enum igt_commit_style s);
> > > > -int  igt_display_commit(igt_display_t *display);
> > > > -int  igt_display_try_commit2(igt_display_t *display, enum igt_commit_style s);
> > > > -int  igt_display_get_n_pipes(igt_display_t *display);
> > > > +
> > > > +/**
> > > > + * igt_display_commit2:
> > > > + * @display: DRM device handle
> > > > + * @s: Commit style
> > > > + *
> > > > + * Commits framebuffer and positioning changes to all planes of each display
> > > > + * pipe, using a specific API to perform the programming.  This function should
> > > > + * be used to exercise a specific driver programming API; igt_display_commit
> > > > + * should be used instead if the API used is unimportant to the test being run.
> > > > + *
> > > > + * This function should only be used to commit changes that are expected to
> > > > + * succeed, since any failure during the commit process will cause the IGT
> > > > + * subtest to fail.  To commit changes that are expected to fail, use
> > > > + * @igt_try_display_commit2 instead.
> > > > + *
> > > > + * Returns: 0 upon success.  This function will never return upon failure
> > > > + * since igt_fail() at lower levels will longjmp out of it.
> > > > + */
> > > > +int igt_display_commit2(igt_display_t *display, enum igt_commit_style s);
> > > > +
> > > > +/**
> > > > + * igt_display_commit:
> > > > + * @display: DRM device handle
> > > > + *
> > > > + * Commits framebuffer and positioning changes to all planes of each display
> > > > + * pipe.
> > > > + *
> > > > + * Returns: 0 upon success.  This function will never return upon failure
> > > > + * since igt_fail() at lower levels will longjmp out of it.
> > > > + */
> > > > +int igt_display_commit(igt_display_t *display);
> > > > +
> > > > +/**
> > > > + * igt_display_try_commit2:
> > > > + * @display: DRM device handle
> > > > + * @s: Commit style
> > > > + *
> > > > + * Attempts to commit framebuffer and positioning changes to all planes of each
> > > > + * display pipe.  This function should be used to commit changes that are
> > > > + * expected to fail, so that the error code can be checked for correctness.
> > > > + * For changes that are expected to succeed, use @igt_display_commit instead.
> > > > + *
> > > > + * Note that in non-atomic commit styles, no display programming will be
> > > > + * performed after the first failure is encountered, so only some of the
> > > > + * operations requested by a test may have been completed.  Tests that catch
> > > > + * errors returned by this function should take care to restore the display to
> > > > + * a sane state after a failure is detected.
> > > > + *
> > > > + * Returns: 0 upon success, otherwise the error code of the first error
> > > > + * encountered.
> > > > + */
> > > > +int igt_display_try_commit2(igt_display_t *display, enum igt_commit_style s);
> > > > +
> > > > +int igt_display_get_n_pipes(igt_display_t *display);
> > > >  
> > > >  const char *igt_output_name(igt_output_t *output);
> > > >  drmModeModeInfo *igt_output_get_mode(igt_output_t *output);
> > > > +
> > > > +/**
> > > > + * igt_output_override_mode:
> > > > + * @output: Output of which the mode will be overridden
> > > > + * @mode: New mode
> > > > + *
> > > > + * Overrides the output's mode with @mode, so that it is used instead of the
> > > > + * mode obtained with get connectors. Note that the mode is used without
> > > > + * checking if the output supports it, so this might lead to unexpected results.
> > > > + */
> > > >  void igt_output_override_mode(igt_output_t *output, drmModeModeInfo *mode);
> > > > +
> > > >  void igt_output_set_pipe(igt_output_t *output, enum pipe pipe);
> > > > +
> > > >  igt_plane_t *igt_output_get_plane(igt_output_t *output, enum igt_plane plane);
> > > >  
> > > >  static inline bool igt_plane_supports_rotation(igt_plane_t *plane)
> > > > @@ -256,15 +502,61 @@ static inline bool igt_plane_supports_rotation(igt_plane_t *plane)
> > > >  }
> > > >  
> > > >  void igt_plane_set_fb(igt_plane_t *plane, struct igt_fb *fb);
> > > > +
> > > >  void igt_plane_set_position(igt_plane_t *plane, int x, int y);
> > > > +
> > > > +/**
> > > > + * igt_plane_set_size:
> > > > + * @plane: plane pointer for which size to be set
> > > > + * @w: width
> > > > + * @h: height
> > > > + *
> > > > + * This function sets width and height for requested plane.
> > > > + * New size will be committed at plane commit time via
> > > > + * drmModeSetPlane().
> > > > + */
> > > >  void igt_plane_set_size(igt_plane_t *plane, int w, int h);
> > > > +
> > > >  void igt_plane_set_panning(igt_plane_t *plane, int x, int y);
> > > > +
> > > >  void igt_plane_set_rotation(igt_plane_t *plane, igt_rotation_t rotation);
> > > > +
> > > > +/**
> > > > + * igt_crtc_set_background:
> > > > + * @pipe: pipe pointer to which background color to be set
> > > > + * @background: background color value in BGR 16bpc
> > > > + *
> > > > + * Sets background color for requested pipe. Color value provided here
> > > > + * will be actually submitted at output commit time via "background_color"
> > > > + * property.
> > > > + * For example to get red as background, set background = 0x00000000FFFF.
> > > > + */
> > > >  void igt_crtc_set_background(igt_pipe_t *pipe, uint64_t background);
> > > > -void igt_fb_set_position(struct igt_fb *fb, igt_plane_t *plane,
> > > > -	uint32_t x, uint32_t y);
> > > > -void igt_fb_set_size(struct igt_fb *fb, igt_plane_t *plane,
> > > > -	uint32_t w, uint32_t h);
> > > > +
> > > > +/**
> > > > + * igt_fb_set_position:
> > > > + * @fb: framebuffer pointer
> > > > + * @plane: plane
> > > > + * @x: X position
> > > > + * @y: Y position
> > > > + *
> > > > + * This function sets position for requested framebuffer as src to plane.
> > > > + * New position will be committed at plane commit time via drmModeSetPlane().
> > > > + */
> > > > +void igt_fb_set_position(struct igt_fb *fb, igt_plane_t *plane, uint32_t x, uint32_t y);
> > > > +
> > > > +/**
> > > > + * igt_fb_set_size:
> > > > + * @fb: framebuffer pointer
> > > > + * @plane: plane
> > > > + * @w: width
> > > > + * @h: height
> > > > + *
> > > > + * This function sets fetch rect size from requested framebuffer as src
> > > > + * to plane. New size will be committed at plane commit time via
> > > > + * drmModeSetPlane().
> > > > + */
> > > > +void igt_fb_set_size(struct igt_fb *fb, igt_plane_t *plane, uint32_t w, uint32_t h);
> > > >  
> > > >  void igt_wait_for_vblank(int drm_fd, enum pipe pipe);
> > > >  
> > > > @@ -281,12 +573,62 @@ void igt_wait_for_vblank(int drm_fd, enum pipe pipe);
> > > >  
> > > >  #define IGT_FIXED(i,f)	((i) << 16 | (f))
> > > >  
> > > > +/**
> > > > + * igt_enable_connectors:
> > > > + *
> > > > + * Force connectors to be enabled where this is known to work well. Use
> > > > + * #igt_reset_connectors to revert the changes.
> > > > + *
> > > > + * An exit handler is installed to ensure connectors are reset when the test
> > > > + * exits.
> > > > + */
> > > >  void igt_enable_connectors(void);
> > > > +
> > > > +/**
> > > > + * igt_reset_connectors:
> > > > + *
> > > > + * Remove any forced state from the connectors.
> > > > + */
> > > >  void igt_reset_connectors(void);
> > > >  
> > > >  #define EDID_LENGTH 128
> > > > -const unsigned char* igt_kms_get_base_edid(void);
> > > > -const unsigned char* igt_kms_get_alt_edid(void);
> > > > +
> > > > +/**
> > > > + * igt_kms_get_base_edid:
> > > > + *
> > > > + * Get the base edid block, which includes the following modes:
> > > > + *
> > > > + *  - 1920x1080 60Hz
> > > > + *  - 1280x720 60Hz
> > > > + *  - 1024x768 60Hz
> > > > + *  - 800x600 60Hz
> > > > + *  - 640x480 60Hz
> > > > + *
> > > > + * This can be extended with further features using functions such as
> > > > + * #kmstest_edid_add_3d.
> > > > + *
> > > > + * Returns: a basic edid block
> > > > + */
> > > > +const unsigned char *igt_kms_get_base_edid(void);
> > > > +
> > > > +/**
> > > > + * igt_kms_get_alt_edid:
> > > > + *
> > > > + * Get an alternate edid block, which includes the following modes:
> > > > + *
> > > > + *  - 1400x1050 60Hz
> > > > + *  - 1920x1080 60Hz
> > > > + *  - 1280x720 60Hz
> > > > + *  - 1024x768 60Hz
> > > > + *  - 800x600 60Hz
> > > > + *  - 640x480 60Hz
> > > > + *
> > > > + * This can be extended with further features using functions such as
> > > > + * #kmstest_edid_add_3d.
> > > > + *
> > > > + * Returns: an alternate edid block
> > > > + */
> > > > +const unsigned char *igt_kms_get_alt_edid(void);
> > > >  
> > > >  
> > > >  #endif /* __IGT_KMS_H__ */
> > > > -- 
> > > > 2.6.2
> > > > 
> > > 
> > > -- 
> > > Daniel Vetter
> > > Software Engineer, Intel Corporation
> > > http://blog.ffwll.ch
> 
> 
> 
> -- 
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx

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Re: [PATCH i-g-t 0/2] Improve remaining documentation for igt_kms

[Daniel Vetter]

On Thu, Jan 07, 2016 at 04:10:07PM +0200, Marius Vlad wrote:
> 
> 

When resending pls write some indication of what changed, both in the over
and in the patches themselves. In the patches we do a more formal
changelog even, with a per-change v2: heading.

Also when resending the entire series please start a new thread.

Thanks, Daniel

> Marius Vlad (2):
>   lib/igt_kms: Improve documentation.
>   lib/igt_kms: Short description between Intel/DRM terminology.
> 
>  lib/igt_kms.c | 242 ++++++++++++++++++++++++++++++++++++++++++++++++----------
>  lib/igt_kms.h | 123 +++++++++++++++++++++++++++--
>  2 files changed, 318 insertions(+), 47 deletions(-)
> 
> -- 
> 2.6.2
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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