For now, let's just look at the 3D_present flag of the CEA HDMI vendor block to detect if the sink supports a small list of then mandatory 3D formats.
See the HDMI 1.4a 3D extraction for detail: http://www.hdmi.org/manufacturer/specification.aspx Signed-off-by: Damien Lespiau <damien.lesp...@intel.com> --- drivers/gpu/drm/drm_edid.c | 75 +++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 68 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index a207cc3..9d9881b 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -2550,13 +2550,60 @@ do_cea_modes(struct drm_connector *connector, const u8 *db, u8 len) return modes; } +struct s3d_mandatory_mode { + int width, height, freq; + unsigned int interlace_flag, formats; +}; + +static const struct s3d_mandatory_mode s3d_mandatory_modes[] = { + { 1920, 1080, 24, 0, + DRM_MODE_FLAG_3D_TOP_AND_BOTTOM | DRM_MODE_FLAG_3D_FRAME_PACKING }, + { 1920, 1080, 50, DRM_MODE_FLAG_INTERLACE, + DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF }, + { 1920, 1080, 60, DRM_MODE_FLAG_INTERLACE, + DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF }, + { 1280, 720, 50, 0, + DRM_MODE_FLAG_3D_TOP_AND_BOTTOM | DRM_MODE_FLAG_3D_FRAME_PACKING }, + { 1280, 720, 60, 0, + DRM_MODE_FLAG_3D_TOP_AND_BOTTOM | DRM_MODE_FLAG_3D_FRAME_PACKING } +}; + +static bool match_s3d_mandatory_mode(const struct drm_display_mode *mode, + const struct s3d_mandatory_mode *s3d_mode) +{ + unsigned int interlaced = mode->flags & DRM_MODE_FLAG_INTERLACE; + + return mode->hdisplay == s3d_mode->width && + mode->vdisplay == s3d_mode->height && + interlaced == s3d_mode->interlace_flag && + drm_mode_vrefresh(mode) == s3d_mode->freq; +} + +static void hdmi_patch_stereo_mode(struct drm_display_mode *mode) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(s3d_mandatory_modes); i++) + if (match_s3d_mandatory_mode(mode, &s3d_mandatory_modes[i])) + mode->flags |= s3d_mandatory_modes[i].formats; +} + +static void hdmi_patch_stereo_modes(struct drm_connector *connector) +{ + struct drm_display_mode *mode; + + list_for_each_entry(mode, &connector->probed_modes, head) + hdmi_patch_stereo_mode(mode); +} + /* * do_hdmi_vsdb_modes - Parse the HDMI Vendor Specific data block * @connector: connector corresponding to the HDMI sink * @db: start of the CEA vendor specific block * @len: length of the CEA block payload, ie. one can access up to db[len] * - * Parses the HDMI VSDB looking for modes to add to @connector. + * Parses the HDMI VSDB looking for modes to add to @connector. This function + * also adds the stereo 3d flags to already added modes. */ static int do_hdmi_vsdb_modes(struct drm_connector *connector, const u8 *db, u8 len) @@ -2582,10 +2629,15 @@ do_hdmi_vsdb_modes(struct drm_connector *connector, const u8 *db, u8 len) /* the declared length is not long enough for the 2 first bytes * of additional video format capabilities */ - offset += 2; - if (len < (8 + offset)) + if (len < (8 + offset + 2)) goto out; + /* 3D_Present */ + offset++; + if (db[8 + offset] & (1 << 7)) + hdmi_patch_stereo_modes(connector); + + offset++; vic_len = db[8 + offset] >> 5; for (i = 0; i < vic_len && len >= (9 + offset + i); i++) { @@ -2665,8 +2717,8 @@ static int add_cea_modes(struct drm_connector *connector, struct edid *edid) { const u8 *cea = drm_find_cea_extension(edid); - const u8 *db; - u8 dbl; + const u8 *db, *hdmi = NULL; + u8 dbl, hdmi_len; int modes = 0; if (cea && cea_revision(cea) >= 3) { @@ -2681,11 +2733,20 @@ add_cea_modes(struct drm_connector *connector, struct edid *edid) if (cea_db_tag(db) == VIDEO_BLOCK) modes += do_cea_modes(connector, db + 1, dbl); - else if (cea_db_is_hdmi_vsdb(db)) - modes += do_hdmi_vsdb_modes(connector, db, dbl); + else if (cea_db_is_hdmi_vsdb(db)) { + hdmi = db; + hdmi_len = dbl; + } } } + /* + * We parse the HDMI VSDB after having added the cea modes as we will + * be patching their flags when the sink supports stereo 3D. + */ + if (hdmi) + modes += do_hdmi_vsdb_modes(connector, hdmi, hdmi_len); + return modes; } -- 1.8.3.1 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/dri-devel
