diff mbox

[v3] drm: add support for additional stereo 3D modes

Message ID 1381935530-6393-1-git-send-email-thomas.wood@intel.com (mailing list archive)
State Accepted
Headers show

Commit Message

Thomas Wood Oct. 16, 2013, 2:58 p.m. UTC 
Parse the 3D_Structure_ALL and 3D_MASK fields of the HDMI Vendor
Specific Data Block to expose more stereo 3D modes.

v2: Use (1 << 0) for consistency. (Ville Syrjälä)
    Skip adding any modes if 3D_MASK is indicated as being present but
    the length only includes 3D_Structure_ALL. (Ville Syrjälä)
    Check that the value of HDMI_3D_LEN is large enough to include
    3D_Structure_ALL and 3D_MASK, if they are present. (Ville Syrjälä)
v3: Increment offset before the length checks. (Ville Syrjälä)

Signed-off-by: Thomas Wood <thomas.wood@intel.com>
---
 drivers/gpu/drm/drm_edid.c | 103 +++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 94 insertions(+), 9 deletions(-)

Comments

Ville Syrjälä Oct. 16, 2013, 3:07 p.m. UTC | #1 
On Wed, Oct 16, 2013 at 03:58:50PM +0100, Thomas Wood wrote:
> Parse the 3D_Structure_ALL and 3D_MASK fields of the HDMI Vendor
> Specific Data Block to expose more stereo 3D modes.
> 
> v2: Use (1 << 0) for consistency. (Ville Syrjälä)
>     Skip adding any modes if 3D_MASK is indicated as being present but
>     the length only includes 3D_Structure_ALL. (Ville Syrjälä)
>     Check that the value of HDMI_3D_LEN is large enough to include
>     3D_Structure_ALL and 3D_MASK, if they are present. (Ville Syrjälä)
> v3: Increment offset before the length checks. (Ville Syrjälä)
> 
> Signed-off-by: Thomas Wood <thomas.wood@intel.com>

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

> ---
>  drivers/gpu/drm/drm_edid.c | 103 +++++++++++++++++++++++++++++++++++++++++----
>  1 file changed, 94 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 9e81609..f1764ec 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -2652,6 +2652,50 @@ static int add_hdmi_mode(struct drm_connector *connector, u8 vic)
>  	return 1;
>  }
>  
> +static int add_3d_struct_modes(struct drm_connector *connector, u16 structure,
> +			       const u8 *video_db, u8 video_len, u8 video_index)
> +{
> +	struct drm_device *dev = connector->dev;
> +	struct drm_display_mode *newmode;
> +	int modes = 0;
> +	u8 cea_mode;
> +
> +	if (video_db == NULL || video_index > video_len)
> +		return 0;
> +
> +	/* CEA modes are numbered 1..127 */
> +	cea_mode = (video_db[video_index] & 127) - 1;
> +	if (cea_mode >= ARRAY_SIZE(edid_cea_modes))
> +		return 0;
> +
> +	if (structure & (1 << 0)) {
> +		newmode = drm_mode_duplicate(dev, &edid_cea_modes[cea_mode]);
> +		if (newmode) {
> +			newmode->flags |= DRM_MODE_FLAG_3D_FRAME_PACKING;
> +			drm_mode_probed_add(connector, newmode);
> +			modes++;
> +		}
> +	}
> +	if (structure & (1 << 6)) {
> +		newmode = drm_mode_duplicate(dev, &edid_cea_modes[cea_mode]);
> +		if (newmode) {
> +			newmode->flags |= DRM_MODE_FLAG_3D_TOP_AND_BOTTOM;
> +			drm_mode_probed_add(connector, newmode);
> +			modes++;
> +		}
> +	}
> +	if (structure & (1 << 8)) {
> +		newmode = drm_mode_duplicate(dev, &edid_cea_modes[cea_mode]);
> +		if (newmode) {
> +			newmode->flags = DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF;
> +			drm_mode_probed_add(connector, newmode);
> +			modes++;
> +		}
> +	}
> +
> +	return modes;
> +}
> +
>  /*
>   * do_hdmi_vsdb_modes - Parse the HDMI Vendor Specific data block
>   * @connector: connector corresponding to the HDMI sink
> @@ -2662,10 +2706,13 @@ static int add_hdmi_mode(struct drm_connector *connector, u8 vic)
>   * also adds the stereo 3d modes when applicable.
>   */
>  static int
> -do_hdmi_vsdb_modes(struct drm_connector *connector, const u8 *db, u8 len)
> +do_hdmi_vsdb_modes(struct drm_connector *connector, const u8 *db, u8 len,
> +		   const u8 *video_db, u8 video_len)
>  {
> -	int modes = 0, offset = 0, i;
> -	u8 vic_len;
> +	int modes = 0, offset = 0, i, multi_present = 0;
> +	u8 vic_len, hdmi_3d_len = 0;
> +	u16 mask;
> +	u16 structure_all;
>  
>  	if (len < 8)
>  		goto out;
> @@ -2689,11 +2736,16 @@ do_hdmi_vsdb_modes(struct drm_connector *connector, const u8 *db, u8 len)
>  
>  	/* 3D_Present */
>  	offset++;
> -	if (db[8 + offset] & (1 << 7))
> +	if (db[8 + offset] & (1 << 7)) {
>  		modes += add_hdmi_mandatory_stereo_modes(connector);
>  
> +		/* 3D_Multi_present */
> +		multi_present = (db[8 + offset] & 0x60) >> 5;
> +	}
> +
>  	offset++;
>  	vic_len = db[8 + offset] >> 5;
> +	hdmi_3d_len = db[8 + offset] & 0x1f;
>  
>  	for (i = 0; i < vic_len && len >= (9 + offset + i); i++) {
>  		u8 vic;
> @@ -2701,6 +2753,35 @@ do_hdmi_vsdb_modes(struct drm_connector *connector, const u8 *db, u8 len)
>  		vic = db[9 + offset + i];
>  		modes += add_hdmi_mode(connector, vic);
>  	}
> +	offset += 1 + vic_len;
> +
> +	if (!(multi_present == 1 || multi_present == 2))
> +		goto out;
> +
> +	if ((multi_present == 1 && len < (9 + offset)) ||
> +	    (multi_present == 2 && len < (11 + offset)))
> +		goto out;
> +
> +	if ((multi_present == 1 && hdmi_3d_len < 2) ||
> +	    (multi_present == 2 && hdmi_3d_len < 4))
> +		goto out;
> +
> +	/* 3D_Structure_ALL */
> +	structure_all = (db[8 + offset] << 8) | db[9 + offset];
> +
> +	/* check if 3D_MASK is present */
> +	if (multi_present == 2)
> +		mask = (db[10 + offset] << 8) | db[11 + offset];
> +	else
> +		mask = 0xffff;
> +
> +	for (i = 0; i < 16; i++) {
> +		if (mask & (1 << i))
> +			modes += add_3d_struct_modes(connector,
> +						     structure_all,
> +						     video_db,
> +						     video_len, i);
> +	}
>  
>  out:
>  	return modes;
> @@ -2759,8 +2840,8 @@ static int
>  add_cea_modes(struct drm_connector *connector, struct edid *edid)
>  {
>  	const u8 *cea = drm_find_cea_extension(edid);
> -	const u8 *db, *hdmi = NULL;
> -	u8 dbl, hdmi_len;
> +	const u8 *db, *hdmi = NULL, *video = NULL;
> +	u8 dbl, hdmi_len, video_len = 0;
>  	int modes = 0;
>  
>  	if (cea && cea_revision(cea) >= 3) {
> @@ -2773,8 +2854,11 @@ add_cea_modes(struct drm_connector *connector, struct edid *edid)
>  			db = &cea[i];
>  			dbl = cea_db_payload_len(db);
>  
> -			if (cea_db_tag(db) == VIDEO_BLOCK)
> -				modes += do_cea_modes(connector, db + 1, dbl);
> +			if (cea_db_tag(db) == VIDEO_BLOCK) {
> +				video = db + 1;
> +				video_len = dbl;
> +				modes += do_cea_modes(connector, video, dbl);
> +			}
>  			else if (cea_db_is_hdmi_vsdb(db)) {
>  				hdmi = db;
>  				hdmi_len = dbl;
> @@ -2787,7 +2871,8 @@ add_cea_modes(struct drm_connector *connector, struct edid *edid)
>  	 * be patching their flags when the sink supports stereo 3D.
>  	 */
>  	if (hdmi)
> -		modes += do_hdmi_vsdb_modes(connector, hdmi, hdmi_len);
> +		modes += do_hdmi_vsdb_modes(connector, hdmi, hdmi_len, video,
> +					    video_len);
>  
>  	return modes;
>  }
> -- 
> 1.8.3.1
Daniel Vetter Oct. 16, 2013, 5:48 p.m. UTC | #2 
On Wed, Oct 16, 2013 at 06:07:30PM +0300, Ville Syrjälä wrote:
> On Wed, Oct 16, 2013 at 03:58:50PM +0100, Thomas Wood wrote:
> > Parse the 3D_Structure_ALL and 3D_MASK fields of the HDMI Vendor
> > Specific Data Block to expose more stereo 3D modes.
> > 
> > v2: Use (1 << 0) for consistency. (Ville Syrjälä)
> >     Skip adding any modes if 3D_MASK is indicated as being present but
> >     the length only includes 3D_Structure_ALL. (Ville Syrjälä)
> >     Check that the value of HDMI_3D_LEN is large enough to include
> >     3D_Structure_ALL and 3D_MASK, if they are present. (Ville Syrjälä)
> > v3: Increment offset before the length checks. (Ville Syrjälä)
> > 
> > Signed-off-by: Thomas Wood <thomas.wood@intel.com>
> 
> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

Queued for -next, thanks for the patch.
-Daniel
diff mbox

Patch

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 9e81609..f1764ec 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -2652,6 +2652,50 @@  static int add_hdmi_mode(struct drm_connector *connector, u8 vic)
 	return 1;
 }
 
+static int add_3d_struct_modes(struct drm_connector *connector, u16 structure,
+			       const u8 *video_db, u8 video_len, u8 video_index)
+{
+	struct drm_device *dev = connector->dev;
+	struct drm_display_mode *newmode;
+	int modes = 0;
+	u8 cea_mode;
+
+	if (video_db == NULL || video_index > video_len)
+		return 0;
+
+	/* CEA modes are numbered 1..127 */
+	cea_mode = (video_db[video_index] & 127) - 1;
+	if (cea_mode >= ARRAY_SIZE(edid_cea_modes))
+		return 0;
+
+	if (structure & (1 << 0)) {
+		newmode = drm_mode_duplicate(dev, &edid_cea_modes[cea_mode]);
+		if (newmode) {
+			newmode->flags |= DRM_MODE_FLAG_3D_FRAME_PACKING;
+			drm_mode_probed_add(connector, newmode);
+			modes++;
+		}
+	}
+	if (structure & (1 << 6)) {
+		newmode = drm_mode_duplicate(dev, &edid_cea_modes[cea_mode]);
+		if (newmode) {
+			newmode->flags |= DRM_MODE_FLAG_3D_TOP_AND_BOTTOM;
+			drm_mode_probed_add(connector, newmode);
+			modes++;
+		}
+	}
+	if (structure & (1 << 8)) {
+		newmode = drm_mode_duplicate(dev, &edid_cea_modes[cea_mode]);
+		if (newmode) {
+			newmode->flags = DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF;
+			drm_mode_probed_add(connector, newmode);
+			modes++;
+		}
+	}
+
+	return modes;
+}
+
 /*
  * do_hdmi_vsdb_modes - Parse the HDMI Vendor Specific data block
  * @connector: connector corresponding to the HDMI sink
@@ -2662,10 +2706,13 @@  static int add_hdmi_mode(struct drm_connector *connector, u8 vic)
  * also adds the stereo 3d modes when applicable.
  */
 static int
-do_hdmi_vsdb_modes(struct drm_connector *connector, const u8 *db, u8 len)
+do_hdmi_vsdb_modes(struct drm_connector *connector, const u8 *db, u8 len,
+		   const u8 *video_db, u8 video_len)
 {
-	int modes = 0, offset = 0, i;
-	u8 vic_len;
+	int modes = 0, offset = 0, i, multi_present = 0;
+	u8 vic_len, hdmi_3d_len = 0;
+	u16 mask;
+	u16 structure_all;
 
 	if (len < 8)
 		goto out;
@@ -2689,11 +2736,16 @@  do_hdmi_vsdb_modes(struct drm_connector *connector, const u8 *db, u8 len)
 
 	/* 3D_Present */
 	offset++;
-	if (db[8 + offset] & (1 << 7))
+	if (db[8 + offset] & (1 << 7)) {
 		modes += add_hdmi_mandatory_stereo_modes(connector);
 
+		/* 3D_Multi_present */
+		multi_present = (db[8 + offset] & 0x60) >> 5;
+	}
+
 	offset++;
 	vic_len = db[8 + offset] >> 5;
+	hdmi_3d_len = db[8 + offset] & 0x1f;
 
 	for (i = 0; i < vic_len && len >= (9 + offset + i); i++) {
 		u8 vic;
@@ -2701,6 +2753,35 @@  do_hdmi_vsdb_modes(struct drm_connector *connector, const u8 *db, u8 len)
 		vic = db[9 + offset + i];
 		modes += add_hdmi_mode(connector, vic);
 	}
+	offset += 1 + vic_len;
+
+	if (!(multi_present == 1 || multi_present == 2))
+		goto out;
+
+	if ((multi_present == 1 && len < (9 + offset)) ||
+	    (multi_present == 2 && len < (11 + offset)))
+		goto out;
+
+	if ((multi_present == 1 && hdmi_3d_len < 2) ||
+	    (multi_present == 2 && hdmi_3d_len < 4))
+		goto out;
+
+	/* 3D_Structure_ALL */
+	structure_all = (db[8 + offset] << 8) | db[9 + offset];
+
+	/* check if 3D_MASK is present */
+	if (multi_present == 2)
+		mask = (db[10 + offset] << 8) | db[11 + offset];
+	else
+		mask = 0xffff;
+
+	for (i = 0; i < 16; i++) {
+		if (mask & (1 << i))
+			modes += add_3d_struct_modes(connector,
+						     structure_all,
+						     video_db,
+						     video_len, i);
+	}
 
 out:
 	return modes;
@@ -2759,8 +2840,8 @@  static int
 add_cea_modes(struct drm_connector *connector, struct edid *edid)
 {
 	const u8 *cea = drm_find_cea_extension(edid);
-	const u8 *db, *hdmi = NULL;
-	u8 dbl, hdmi_len;
+	const u8 *db, *hdmi = NULL, *video = NULL;
+	u8 dbl, hdmi_len, video_len = 0;
 	int modes = 0;
 
 	if (cea && cea_revision(cea) >= 3) {
@@ -2773,8 +2854,11 @@  add_cea_modes(struct drm_connector *connector, struct edid *edid)
 			db = &cea[i];
 			dbl = cea_db_payload_len(db);
 
-			if (cea_db_tag(db) == VIDEO_BLOCK)
-				modes += do_cea_modes(connector, db + 1, dbl);
+			if (cea_db_tag(db) == VIDEO_BLOCK) {
+				video = db + 1;
+				video_len = dbl;
+				modes += do_cea_modes(connector, video, dbl);
+			}
 			else if (cea_db_is_hdmi_vsdb(db)) {
 				hdmi = db;
 				hdmi_len = dbl;
@@ -2787,7 +2871,8 @@  add_cea_modes(struct drm_connector *connector, struct edid *edid)
 	 * be patching their flags when the sink supports stereo 3D.
 	 */
 	if (hdmi)
-		modes += do_hdmi_vsdb_modes(connector, hdmi, hdmi_len);
+		modes += do_hdmi_vsdb_modes(connector, hdmi, hdmi_len, video,
+					    video_len);
 
 	return modes;
 }