From: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>
If the user mode does not support aspect-ratio, and requests for
a modeset with aspect ratio flags, then the flag bits reprsenting
aspect ratio must be ignored.
Similarly, if user space doesn't set the aspect ratio client cap,
while preparing a usermode, the aspect-ratio info must not be given
into it.
This patch:
1. adds a new bit field aspect_ratio_allowed in drm_atomic_state,
which is set only if the aspect-ratio is supported by the user.
2. discards the aspect-ratio info from the user mode while
preparing kernel mode structure, during modeset, if the
user does not support aspect ratio.
3. avoids setting the aspect-ratio info in user-mode, while
converting user-mode from the kernel-mode.
Cc: Ville Syrjala <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: Shashank Sharma <shashank.sharma@xxxxxxxxx>
Cc: Jose Abreu <jose.abreu@xxxxxxxxxxxx>
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>
---
drivers/gpu/drm/drm_atomic.c | 40 +++++++++++++++++++++++++++++++++-------
drivers/gpu/drm/drm_crtc.c | 19 +++++++++++++++++++
include/drm/drm_atomic.h | 2 ++
3 files changed, 54 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 37445d5..b9743af 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -338,18 +338,30 @@ int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state,
state->mode_blob = NULL;
if (mode) {
- drm_mode_convert_to_umode(&umode, mode);
+ /*
+ * If the user has not asked for aspect ratio support,
+ * take a copy of the 'mode' and set the aspect ratio as
+ * None. This copy is used to prepare the user-mode with no
+ * aspect-ratio info.
+ */
+ struct drm_display_mode ar_mode;
+ struct drm_atomic_state *atomic_state = state->state;
+
+ drm_mode_copy(&ar_mode, mode);
+ if (atomic_state && !atomic_state->allow_aspect_ratio)
+ ar_mode.picture_aspect_ratio = HDMI_PICTURE_ASPECT_NONE;
+ drm_mode_convert_to_umode(&umode, &ar_mode);
state->mode_blob =
drm_property_create_blob(state->crtc->dev,
- sizeof(umode),
- &umode);
+ sizeof(umode),
+ &umode);
if (IS_ERR(state->mode_blob))
return PTR_ERR(state->mode_blob);
- drm_mode_copy(&state->mode, mode);
+ drm_mode_copy(&state->mode, &ar_mode);
state->enable = true;
DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n",
- mode->name, state);
+ ar_mode.name, state);
} else {
memset(&state->mode, 0, sizeof(state->mode));
state->enable = false;
@@ -386,10 +398,23 @@ int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state,
memset(&state->mode, 0, sizeof(state->mode));
if (blob) {
+ struct drm_mode_modeinfo *ar_umode;
+ struct drm_atomic_state *atomic_state;
+
+ /*
+ * If the user-space does not ask for aspect-ratio
+ * the aspect ratio bits in the drmModeModeinfo from user,
+ * does not mean anything. Therefore these bits must be
+ * discarded.
+ */
+ ar_umode = (struct drm_mode_modeinfo *) blob->data;
+ atomic_state = state->state;
+ if (atomic_state && !atomic_state->allow_aspect_ratio)
+ ar_umode->flags &= (~DRM_MODE_FLAG_PIC_AR_MASK);
if (blob->length != sizeof(struct drm_mode_modeinfo) ||
drm_mode_convert_umode(&state->mode,
- (const struct drm_mode_modeinfo *)
- blob->data))
+ (const struct drm_mode_modeinfo *)
+ ar_umode))
return -EINVAL;
state->mode_blob = drm_property_blob_get(blob);
@@ -2229,6 +2254,7 @@ int drm_mode_atomic_ioctl(struct drm_device *dev,
state->acquire_ctx = &ctx;
state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET);
+ state->allow_aspect_ratio = file_priv->aspect_ratio_allowed;
retry:
plane_mask = 0;
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index f0556e6..a2d34fa 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -425,6 +425,13 @@ int drm_mode_getcrtc(struct drm_device *dev,
drm_modeset_lock(&crtc->mutex, NULL);
if (crtc->state) {
if (crtc->state->enable) {
+ /*
+ * If the aspect-ratio is not required by the,
+ * userspace, do not set the aspect-ratio flags.
+ */
+ if (!file_priv->aspect_ratio_allowed)
+ crtc->state->mode.picture_aspect_ratio =
+ HDMI_PICTURE_ASPECT_NONE;
drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode);
crtc_resp->mode_valid = 1;
@@ -435,6 +442,13 @@ int drm_mode_getcrtc(struct drm_device *dev,
crtc_resp->x = crtc->x;
crtc_resp->y = crtc->y;
if (crtc->enabled) {
+ /*
+ * If the aspect-ratio is not required by the,
+ * userspace, do not set the aspect-ratio flags.
+ */
+ if (!file_priv->aspect_ratio_allowed)
+ crtc->mode.picture_aspect_ratio =
+ HDMI_PICTURE_ASPECT_NONE;
drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode);
crtc_resp->mode_valid = 1;
@@ -610,6 +624,11 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
goto out;
}
+ /* If the user does not ask for aspect ratio, reset the aspect
+ * ratio bits in the usermode.
+ */
+ if (!file_priv->aspect_ratio_allowed)
+ crtc_req->mode.flags &= (~DRM_MODE_FLAG_PIC_AR_MASK);
ret = drm_mode_convert_umode(mode, &crtc_req->mode);
if (ret) {
DRM_DEBUG_KMS("Invalid mode\n");
diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
index 5afd6e3..ae74b2c 100644
--- a/include/drm/drm_atomic.h
+++ b/include/drm/drm_atomic.h
@@ -209,6 +209,7 @@ struct __drm_private_objs_state {
* @ref: count of all references to this state (will not be freed until zero)
* @dev: parent DRM device
* @allow_modeset: allow full modeset
+ * @allow_aspect_ratio: allow the aspect ratio info to be passes to user
* @legacy_cursor_update: hint to enforce legacy cursor IOCTL semantics
* @async_update: hint for asynchronous plane update
* @planes: pointer to array of structures with per-plane data
@@ -224,6 +225,7 @@ struct drm_atomic_state {
struct drm_device *dev;
bool allow_modeset : 1;
+ bool allow_aspect_ratio : 1;
bool legacy_cursor_update : 1;
bool async_update : 1;
struct __drm_planes_state *planes;
--
2.7.4
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