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drm/edid: parse the list of additional 3D modes

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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)
v3: Make sure the list is parsed even if 3D_Structure_ALL/MASK is not
    present. (Ville Syrjälä)
    Fix one length check and remove another. (Ville Syrjälä)

Signed-off-by: Thomas Wood <thomas.wood@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Thomas Wood 2013-11-29 18:18:58 +00:00 committed by Daniel Vetter
parent aff04ace4e
commit 0e5083aa9d
1 changed files with 77 additions and 25 deletions
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102
drivers/gpu/drm/drm_edid.c
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@ -2739,7 +2739,7 @@ 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;
@ -2785,32 +2785,84 @@ do_hdmi_vsdb_modes(struct drm_connector *connector, const u8 *db, u8 len,
}
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];
if (multi_present == 1)
multi_len = 2;
else if (multi_present == 2)
multi_len = 4;
else
mask = 0xffff;
multi_len = 0;
for (i = 0; i < 16; i++) {
if (mask & (1 << i))
modes += add_3d_struct_modes(connector,
structure_all,
video_db,
video_len, i);
if (len < (8 + offset + hdmi_3d_len - 1))
goto out;
if (hdmi_3d_len < multi_len)
goto out;
if (multi_present == 1 || multi_present == 2) {
/* 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);
}
}
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: