diff options
| author | Kuogee Hsieh <khsieh@codeaurora.org> | 2020-12-18 09:53:40 -0800 |
|---|---|---|
| committer | Rob Clark <robdclark@chromium.org> | 2021-01-07 09:11:02 -0800 |
| commit | 2b5f09cadfc576817c0450e01d454f750909b103 (patch) | |
| tree | 67f762e91b38d0c4ff9bd2c22238e611661ddf2d /drivers/gpu | |
| parent | 07fcad0d726d5da7c43f1c8e8fdb66c93a140ca5 (diff) | |
| download | linux-stable-2b5f09cadfc576817c0450e01d454f750909b103.tar.gz linux-stable-2b5f09cadfc576817c0450e01d454f750909b103.tar.bz2 linux-stable-2b5f09cadfc576817c0450e01d454f750909b103.zip | |
drm/msm/dp: postpone irq_hpd event during connection pending state
irq_hpd event can only be executed at connected state. Therefore
irq_hpd event should be postponed if it happened at connection
pending state. This patch also make sure both link rate and lane
are valid before start link training.
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_display.c | 7 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_panel.c | 12 |
2 files changed, 16 insertions, 3 deletions
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 6e971d552911..3bc7ed21de28 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -693,6 +693,13 @@ static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data) return 0; } + if (state == ST_CONNECT_PENDING) { + /* wait until ST_CONNECTED */ + dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */ + mutex_unlock(&dp->event_mutex); + return 0; + } + ret = dp_display_usbpd_attention_cb(&dp->pdev->dev); if (ret == -ECONNRESET) { /* cable unplugged */ dp->core_initialized = false; diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_panel.c index 97dca3e378b7..d1780bcac8cc 100644 --- a/drivers/gpu/drm/msm/dp/dp_panel.c +++ b/drivers/gpu/drm/msm/dp/dp_panel.c @@ -167,12 +167,18 @@ int dp_panel_read_sink_caps(struct dp_panel *dp_panel, panel = container_of(dp_panel, struct dp_panel_private, dp_panel); rc = dp_panel_read_dpcd(dp_panel); + if (rc) { + DRM_ERROR("read dpcd failed %d\n", rc); + return rc; + } + bw_code = drm_dp_link_rate_to_bw_code(dp_panel->link_info.rate); - if (rc || !is_link_rate_valid(bw_code) || + if (!is_link_rate_valid(bw_code) || !is_lane_count_valid(dp_panel->link_info.num_lanes) || (bw_code > dp_panel->max_bw_code)) { - DRM_ERROR("read dpcd failed %d\n", rc); - return rc; + DRM_ERROR("Illegal link rate=%d lane=%d\n", dp_panel->link_info.rate, + dp_panel->link_info.num_lanes); + return -EINVAL; } if (dp_panel->dfp_present) { |