On Fri, Nov 29, 2013 at 03:33:28PM +0000, Thomas Wood wrote:
> Parse 2D_VIC_order_X and 3D_Structure_X from the list at the end of the
> HDMI Vendor Specific Data Block.
>
> v2: Use an offset value depending on 3D_Multi_present and add
> detail_present. (Ville Syrjälä)
>
> Signed-off-by: Thomas Wood <thomas.wood@xxxxxxxxx>
> ---
> drivers/gpu/drm/drm_edid.c | 64 ++++++++++++++++++++++++++++++++++++++++++----
> 1 file changed, 59 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index f1d6e1e..9426563 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -2734,7 +2734,7 @@ static int
> 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, multi_present = 0;
> + int modes = 0, offset = 0, i, multi_present = 0, multi_len;
> u8 vic_len, hdmi_3d_len = 0;
> u16 mask;
> u16 structure_all;
> @@ -2783,12 +2783,15 @@ do_hdmi_vsdb_modes(struct drm_connector *connector, const u8 *db, u8 len,
> if (!(multi_present == 1 || multi_present == 2))
> goto out;
We should actually skip the 3D_Structure_ALL/MASK stuff in
this case, but we should still go on and parse the 2D_VIC_order
stuff. So this check should be removed.
>
> - if ((multi_present == 1 && len < (9 + offset)) ||
> - (multi_present == 2 && len < (11 + offset)))
> + if (multi_present == 1)
> + multi_len = 2;
> + else
and this should then be 'else if (multi_present == 2)' and
initialize multi_len to 0 in the beginning.
> + multi_len = 4;
> +
> + if (len < (offset + hdmi_3d_len))
At this point db[8 + offset] we be the first 3d byte, so
I think this should actually be something like:
if (len < (8 + offset + hdmi_3d_len - 1))
> goto out;
>
> - if ((multi_present == 1 && hdmi_3d_len < 2) ||
> - (multi_present == 2 && hdmi_3d_len < 4))
> + if (hdmi_3d_len < multi_len)
> goto out;
>
> /* 3D_Structure_ALL */
> @@ -2808,6 +2811,57 @@ do_hdmi_vsdb_modes(struct drm_connector *connector, const u8 *db, u8 len,
> video_len, i);
> }
>
> + if (hdmi_3d_len <= multi_len)
> + goto out;
Already checked, except the == case, but the loop will check
that for us, so this check can be dropped.
> +
> + offset += multi_len;
> +
> + for (i = 0; i < (hdmi_3d_len - multi_len); i++) {
> + int vic_index;
> + struct drm_display_mode *newmode = NULL;
> + unsigned int newflag = 0;
> + bool detail_present;
> +
> + detail_present = ((db[8 + offset + i] & 0x0f) > 7);
> +
> + if (detail_present && (i + 1 == hdmi_3d_len - multi_len))
> + break;
> +
> + /* 2D_VIC_order_X */
> + vic_index = db[8 + offset + i] >> 4;
> +
> + /* 3D_Structure_X */
> + switch (db[8 + offset + i] & 0x0f) {
> + case 0:
> + newflag = DRM_MODE_FLAG_3D_FRAME_PACKING;
> + break;
> + case 6:
> + newflag = DRM_MODE_FLAG_3D_TOP_AND_BOTTOM;
> + break;
> + case 8:
> + /* 3D_Detail_X */
> + if ((db[9 + offset + i] >> 4) == 1)
> + newflag = DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF;
> + break;
> + }
> +
> + if (newflag != 0) {
> + newmode = drm_display_mode_from_vic_index(connector,
> + video_db,
> + video_len,
> + vic_index);
> +
> + if (newmode) {
> + newmode->flags |= newflag;
> + drm_mode_probed_add(connector, newmode);
> + modes++;
> + }
> + }
> +
> + if (detail_present)
> + i++;
> + }
> +
> out:
> return modes;
> }
> --
> 1.8.4.2
>
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--
Ville Syrjälä
Intel OTC
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