drm: bridge: analogix/dp: add max link rate and lane count limit for RK3288
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: Caesar Wang <wxt@rock-chips.com> Tested-by: Douglas Anderson <dianders@chromium.org> Tested-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Yakir Yang <ykk@rock-chips.com>
This commit is contained in:
parent
bcec20fd5a
commit
0d0abd894e
|
@ -893,8 +893,8 @@ 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;
|
||||
|
@ -1203,16 +1203,25 @@ 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->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;
|
||||
|
|
|
@ -123,8 +123,8 @@ struct video_info {
|
|||
enum color_coefficient ycbcr_coeff;
|
||||
enum color_depth color_depth;
|
||||
|
||||
int link_rate;
|
||||
enum link_lane_count_type lane_count;
|
||||
int max_link_rate;
|
||||
enum link_lane_count_type max_lane_count;
|
||||
};
|
||||
|
||||
struct link_train {
|
||||
|
|
Loading…
Reference in a new issue