There are some IP limit on rk3288 that only support 4 physical lanes of 2.7/1.6 Gbps/lane, so seprate them out by device_type flag.
Tested-by: Javier Martinez Canillas javier@osg.samsung.com Signed-off-by: Yakir Yang ykk@rock-chips.com --- Changes in v8: None Changes in v7: None Changes in v6: None Changes in v5: None Changes in v4: - Seprate the link-rate and lane-count limit out with the device_type flag. (Thierry)
Changes in v3: None Changes in v2: None
drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 33 ++++++++++++++-------- drivers/gpu/drm/bridge/analogix/analogix_dp_core.h | 4 +-- 2 files changed, 23 insertions(+), 14 deletions(-)
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index 6307060..563ffb1d 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -890,8 +890,8 @@ static void analogix_dp_commit(struct analogix_dp_device *dp) return; }
- ret = analogix_dp_set_link_train(dp, dp->video_info.lane_count, - dp->video_info.link_rate); + ret = analogix_dp_set_link_train(dp, dp->video_info.max_lane_count, + dp->video_info.max_link_rate); if (ret) { dev_err(dp->dev, "unable to do link train\n"); return; @@ -1156,16 +1156,25 @@ static int analogix_dp_dt_parse_pdata(struct analogix_dp_device *dp) struct device_node *dp_node = dp->dev->of_node; struct video_info *video_info = &dp->video_info;
- if (of_property_read_u32(dp_node, "samsung,link-rate", - &video_info->link_rate)) { - dev_err(dp->dev, "failed to get link-rate\n"); - return -EINVAL; - } - - if (of_property_read_u32(dp_node, "samsung,lane-count", - &video_info->lane_count)) { - dev_err(dp->dev, "failed to get lane-count\n"); - return -EINVAL; + switch (dp->plat_data && dp->plat_data->dev_type) { + case RK3288_DP: + /* + * Like Rk3288 DisplayPort TRM indicate that "Main link + * containing 4 physical lanes of 2.7/1.62 Gbps/lane". + */ + video_info->max_link_rate = 0x0A; + video_info->max_lane_count = 0x04; + break; + case EXYNOS_DP: + /* + * NOTE: those property parseing code is used for + * providing backward compatibility for samsung platform. + */ + of_property_read_u32(dp_node, "samsung,link-rate", + &video_info->max_link_rate); + of_property_read_u32(dp_node, "samsung,lane-count", + &video_info->max_lane_count); + break; }
return 0; diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h index e37cef6..e6f8243 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h @@ -129,8 +129,8 @@ struct video_info { enum color_coefficient ycbcr_coeff; enum color_depth color_depth;
- enum link_rate_type link_rate; - enum link_lane_count_type lane_count; + enum link_rate_type max_link_rate; + enum link_lane_count_type max_lane_count; };
struct link_train {