On Thu, 2017-07-27 at 15:47 +0300, Andrey Gusakov wrote:
Do not fail data rates higher than 2.7 and more than 2 lanes. Try to fall back to 2.7Gbps and 2 lanes.
Signed-off-by: Andrey Gusakov andrey.gusakov@cogentembedded.com
drivers/gpu/drm/bridge/tc358767.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c index 5c26488e7a2d..f605bb7d1aa3 100644 --- a/drivers/gpu/drm/bridge/tc358767.c +++ b/drivers/gpu/drm/bridge/tc358767.c @@ -603,8 +603,15 @@ static int tc_get_display_props(struct tc_data *tc) ret = drm_dp_link_probe(&tc->aux, &tc->link.base); if (ret < 0) goto err_dpcd_read;
- if ((tc->link.base.rate != 162000) && (tc->link.base.rate != 270000))
goto err_dpcd_inval;
if ((tc->link.base.rate != 162000) && (tc->link.base.rate != 270000)) {
dev_dbg(tc->dev, "Falling to 2.7 Gbps rate\n");tc->link.base.rate = 270000;}
if (tc->link.base.num_lanes > 2) {
dev_dbg(tc->dev, "Falling to 2 lanes\n");tc->link.base.num_lanes = 2;}
ret = drm_dp_dpcd_readb(&tc->aux, DP_MAX_DOWNSPREAD, tmp); if (ret < 0)
@@ -637,9 +644,6 @@ static int tc_get_display_props(struct tc_data *tc) err_dpcd_read: dev_err(tc->dev, "failed to read DPCD: %d\n", ret); return ret; -err_dpcd_inval:
- dev_err(tc->dev, "invalid DPCD\n");
- return -EINVAL;
}
static int tc_set_video_mode(struct tc_data *tc, struct drm_display_mode *mode)
Acked-by: Philipp Zabel p.zabel@pengutronix.de
regards Philipp