From 1c0814fed3a558146402713028cb7114734ec172 Mon Sep 17 00:00:00 2001 From: Damien Lespiau Date: Wed, 25 Sep 2013 16:45:20 +0100 Subject: drm: Add a SET_CLIENT_CAP ioctl MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This ioctl can be used to turn some knobs in a DRM driver. The client can ask the DRM core for an alternate view of the reality: it can be useful to be able to instruct the core that the DRM client can handle new functionnality that would otherwise break current ABI. v2: Rename to ioctl from SET_CAP to SET_CLIENT_CAP (Chris Wilson) Reviewed-by: Ville Syrjälä Signed-off-by: Damien Lespiau Acked-by: Dave Airlie Signed-off-by: Daniel Vetter --- drivers/gpu/drm/drm_ioctl.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'drivers/gpu/drm/drm_ioctl.c') diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c index 07247e2855a..15da4124ee1 100644 --- a/drivers/gpu/drm/drm_ioctl.c +++ b/drivers/gpu/drm/drm_ioctl.c @@ -302,6 +302,15 @@ int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv) return 0; } +/** + * Set device/driver capabilities + */ +int +drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv) +{ + return -EINVAL; +} + /** * Setversion ioctl. * -- cgit v1.2.3-70-g09d2 From 61d8e3282541139cf5bb31e4c42f952a6cc168f8 Mon Sep 17 00:00:00 2001 From: Damien Lespiau Date: Wed, 25 Sep 2013 16:45:22 +0100 Subject: drm: Add a STEREO_3D capability to the SET_CLIENT_CAP ioctl MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This capability allows user space to control the delivery of modes with the 3D flags set. This is to not play games with current user space users not knowing anything about stereo 3D flags and that could try to set a mode with one or several of those bits set. So, the plan is to remove the stereo modes from the list of modes we give to DRM clients by default, and let them through if we are being told otherwise. stereo_allowed is bound to the drm_file structure to make it a per-client setting, not a global one. v2: Replace clearing 3D flags by discarding the stereo modes now that they are regular modes. v3: SET_CAP -> SET_CLIENT_CAP rename (Chris Wilson) Reviewed-by: Ville Syrjälä Signed-off-by: Damien Lespiau Acked-by: Dave Airlie Signed-off-by: Daniel Vetter --- drivers/gpu/drm/drm_crtc.c | 19 ++++++++++++++++++- drivers/gpu/drm/drm_ioctl.c | 14 +++++++++++++- include/drm/drmP.h | 3 +++ include/uapi/drm/drm.h | 9 +++++++++ 4 files changed, 43 insertions(+), 2 deletions(-) (limited to 'drivers/gpu/drm/drm_ioctl.c') diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index e79577cb466..454ac8a6381 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -1581,6 +1581,19 @@ out: return ret; } +static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, + const struct drm_file *file_priv) +{ + /* + * If user-space hasn't configured the driver to expose the stereo 3D + * modes, don't expose them. + */ + if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) + return false; + + return true; +} + /** * drm_mode_getconnector - get connector configuration * @dev: drm device for the ioctl @@ -1646,7 +1659,8 @@ int drm_mode_getconnector(struct drm_device *dev, void *data, /* delayed so we get modes regardless of pre-fill_modes state */ list_for_each_entry(mode, &connector->modes, head) - mode_count++; + if (drm_mode_expose_to_userspace(mode, file_priv)) + mode_count++; out_resp->connector_id = connector->base.id; out_resp->connector_type = connector->connector_type; @@ -1668,6 +1682,9 @@ int drm_mode_getconnector(struct drm_device *dev, void *data, copied = 0; mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; list_for_each_entry(mode, &connector->modes, head) { + if (!drm_mode_expose_to_userspace(mode, file_priv)) + continue; + drm_crtc_convert_to_umode(&u_mode, mode); if (copy_to_user(mode_ptr + copied, &u_mode, sizeof(u_mode))) { diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c index 15da4124ee1..dffc836144c 100644 --- a/drivers/gpu/drm/drm_ioctl.c +++ b/drivers/gpu/drm/drm_ioctl.c @@ -308,7 +308,19 @@ int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv) int drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv) { - return -EINVAL; + struct drm_set_client_cap *req = data; + + switch (req->capability) { + case DRM_CLIENT_CAP_STEREO_3D: + if (req->value > 1) + return -EINVAL; + file_priv->stereo_allowed = req->value; + break; + default: + return -EINVAL; + } + + return 0; } /** diff --git a/include/drm/drmP.h b/include/drm/drmP.h index dbc86b06a72..c65f496ad6b 100644 --- a/include/drm/drmP.h +++ b/include/drm/drmP.h @@ -433,6 +433,9 @@ struct drm_file { struct drm_master *master; /* master this node is currently associated with N.B. not always minor->master */ + /* true when the client has asked us to expose stereo 3D mode flags */ + bool stereo_allowed; + /** * fbs - List of framebuffers associated with this file. * diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h index 526baed365f..9b24d65fed7 100644 --- a/include/uapi/drm/drm.h +++ b/include/uapi/drm/drm.h @@ -627,6 +627,15 @@ struct drm_get_cap { __u64 value; }; +/** + * DRM_CLIENT_CAP_STEREO_3D + * + * if set to 1, the DRM core will expose the stereo 3D capabilities of the + * monitor by advertising the supported 3D layouts in the flags of struct + * drm_mode_modeinfo. + */ +#define DRM_CLIENT_CAP_STEREO_3D 1 + /** DRM_IOCTL_SET_CLIENT_CAP ioctl argument type */ struct drm_set_client_cap { __u64 capability; -- cgit v1.2.3-70-g09d2