From: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>
We parse the EDID and add all the modes in the connector's modelist.
This adds CEA modes with aspect ratio information too, regadless of
whether user space requested this information or not.
This patch prunes the modes with aspect-ratio information, from a
connector's modelist, if the user-space has not set the aspect ratio
DRM client cap.
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>
V3: As suggested by Ville, modified the mechanism of pruning of modes
with aspect-ratio, if the aspect-ratio is not supported. Instead
of straight away pruning such a mode, the mode is retained with
aspect ratio bits set to zero, provided it is unique.
V4: rebase
V5: Addressed review comments from Ville:
-used a pointer to store last valid mode.
-avoided, modifying of picture_aspect_ratio in kernel mode,
instead only flags bits of user mode are reset (if aspect-ratio
is not supported).
---
drivers/gpu/drm/drm_connector.c | 45 ++++++++++++++++++++++++++++++++++++-----
1 file changed, 40 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 16b9c38..49778e8 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -1507,8 +1507,10 @@ static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *conne
return connector->encoder;
}
-static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
- const struct drm_file *file_priv)
+static bool
+drm_mode_expose_to_userspace(const struct drm_display_mode *last_mode,
+ 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
@@ -1516,6 +1518,23 @@ static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
*/
if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
return false;
+ /*
+ * If user-space hasn't configured the driver to expose the modes
+ * with aspect-ratio, don't expose them. But in case of a unique
+ * mode, let the mode be passed, so that it can be enumerated with
+ * aspect ratio bits erased.
+ */
+ if (!file_priv->aspect_ratio_allowed &&
+ mode->picture_aspect_ratio != HDMI_PICTURE_ASPECT_NONE) {
+ if (last_mode && !drm_mode_match(mode, last_mode,
+ DRM_MODE_MATCH_TIMINGS |
+ DRM_MODE_MATCH_CLOCK |
+ DRM_MODE_MATCH_FLAGS |
+ DRM_MODE_MATCH_3D_FLAGS))
+ return true;
+ else
+ return false;
+ }
return true;
}
@@ -1527,6 +1546,7 @@ int drm_mode_getconnector(struct drm_device *dev, void *data,
struct drm_connector *connector;
struct drm_encoder *encoder;
struct drm_display_mode *mode;
+ struct drm_display_mode *last_valid_mode;
int mode_count = 0;
int encoders_count = 0;
int ret = 0;
@@ -1582,9 +1602,13 @@ int drm_mode_getconnector(struct drm_device *dev, void *data,
out_resp->connection = connector->status;
/* delayed so we get modes regardless of pre-fill_modes state */
+ last_valid_mode = NULL;
list_for_each_entry(mode, &connector->modes, head)
- if (drm_mode_expose_to_userspace(mode, file_priv))
+ if (drm_mode_expose_to_userspace(last_valid_mode, mode,
+ file_priv)) {
mode_count++;
+ last_valid_mode = mode;
+ }
/*
* This ioctl is called twice, once to determine how much space is
@@ -1593,11 +1617,21 @@ int drm_mode_getconnector(struct drm_device *dev, void *data,
if ((out_resp->count_modes >= mode_count) && mode_count) {
copied = 0;
mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
+ last_valid_mode = NULL;
list_for_each_entry(mode, &connector->modes, head) {
- if (!drm_mode_expose_to_userspace(mode, file_priv))
+ if (!drm_mode_expose_to_userspace(last_valid_mode,
+ mode,
+ file_priv))
continue;
-
drm_mode_convert_to_umode(&u_mode, mode);
+
+ /*
+ * Reset the aspect-ratio flag bits from the user mode,
+ * if the user mode does have aspect ratio capability.
+ */
+ if (!file_priv->aspect_ratio_allowed)
+ u_mode.flags &= (~DRM_MODE_FLAG_PIC_AR_MASK);
+
if (copy_to_user(mode_ptr + copied,
&u_mode, sizeof(u_mode))) {
ret = -EFAULT;
@@ -1605,6 +1639,7 @@ int drm_mode_getconnector(struct drm_device *dev, void *data,
goto out;
}
+ last_valid_mode = mode;
copied++;
}
}
--
2.7.4
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