@@ -441,7 +441,7 @@ int msm_dp_audio_hw_params(struct device *dev,
* such cases check for connection status and bail out if not
* connected.
*/
- if (!msm_dp_display->power_on) {
+ if (!msm_dp_display_get_active_stream_cnt(msm_dp_display)) {
rc = -EINVAL;
goto end;
}
@@ -111,6 +111,8 @@ struct msm_dp_display_private {
bool wide_bus_supported;
+ u32 active_stream_cnt;
+
struct msm_dp_audio *audio;
};
@@ -187,6 +189,15 @@ static const struct of_device_id msm_dp_dt_match[] = {
{}
};
+int msm_dp_display_get_active_stream_cnt(struct msm_dp *msm_dp)
+{
+ struct msm_dp_display_private *msm_dp_display;
+
+ msm_dp_display = container_of(msm_dp, struct msm_dp_display_private, msm_dp_display);
+
+ return msm_dp_display->active_stream_cnt;
+}
+
static struct msm_dp_display_private *dev_get_dp_display_private(struct device *dev)
{
struct msm_dp *dp = dev_get_drvdata(dev);
@@ -662,7 +673,7 @@ static int msm_dp_hpd_unplug_handle(struct msm_dp_display_private *dp, u32 data)
*/
msm_dp_display_notify_disconnect(&dp->msm_dp_display.pdev->dev);
- if (!dp->msm_dp_display.power_on) {
+ if (!dp->active_stream_cnt) {
dp->hpd_state = ST_DISCONNECTED;
} else {
dp->hpd_state = ST_DISCONNECT_PENDING;
@@ -856,7 +867,7 @@ static int msm_dp_display_prepare(struct msm_dp_display_private *dp)
return rc;
}
- if (dp->hpd_state == ST_CONNECTED && !msm_dp_display->power_on) {
+ if (dp->hpd_state == ST_CONNECTED && !dp->active_stream_cnt) {
msm_dp_display_host_phy_init(dp);
force_link_train = true;
}
@@ -872,17 +883,10 @@ static int msm_dp_display_enable(struct msm_dp_display_private *dp,
struct msm_dp_panel *msm_dp_panel)
{
int rc = 0;
- struct msm_dp *msm_dp_display = &dp->msm_dp_display;
drm_dbg_dp(dp->drm_dev, "sink_count=%d\n", dp->link->sink_count);
- if (msm_dp_display->power_on) {
- drm_dbg_dp(dp->drm_dev, "Link already setup, return\n");
- return 0;
- }
rc = msm_dp_ctrl_on_stream(dp->ctrl, msm_dp_panel, dp->max_stream);
- if (!rc)
- msm_dp_display->power_on = true;
return rc;
}
@@ -929,16 +933,14 @@ static void msm_dp_display_audio_notify_disable(struct msm_dp_display_private *d
static int msm_dp_display_disable(struct msm_dp_display_private *dp,
struct msm_dp_panel *msm_dp_panel)
{
- struct msm_dp *msm_dp_display = &dp->msm_dp_display;
-
- if (!msm_dp_display->power_on)
+ if (!dp->active_stream_cnt)
return 0;
msm_dp_ctrl_clear_vsc_sdp_pkt(dp->ctrl, msm_dp_panel);
msm_dp_ctrl_stream_clk_off(dp->ctrl, msm_dp_panel);
- msm_dp_display->power_on = false;
+ dp->active_stream_cnt--;
drm_dbg_dp(dp->drm_dev, "sink count: %d\n", dp->link->sink_count);
return 0;
@@ -1096,7 +1098,7 @@ void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp)
*/
mutex_lock(&msm_dp_display->event_mutex);
- if (!dp->power_on) {
+ if (!msm_dp_display->active_stream_cnt) {
mutex_unlock(&msm_dp_display->event_mutex);
return;
}
@@ -1621,6 +1623,8 @@ void msm_dp_display_enable_helper(struct msm_dp *dp, struct msm_dp_panel *msm_dp
}
}
+ msm_dp_display->active_stream_cnt++;
+
/* completed connection */
msm_dp_display->hpd_state = ST_CONNECTED;
@@ -1645,6 +1649,11 @@ void msm_dp_display_disable_helper(struct msm_dp *dp, struct msm_dp_panel *msm_d
msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display);
+ if (!msm_dp_display->active_stream_cnt) {
+ drm_dbg_dp(dp->drm_dev, "no active streams\n");
+ return;
+ }
+
if (msm_dp_display->max_stream > DEFAULT_STREAM_COUNT)
msm_dp_ctrl_push_vcpf(msm_dp_display->ctrl, msm_dp_panel);
else
@@ -1676,6 +1685,11 @@ void msm_dp_display_unprepare(struct msm_dp *msm_dp)
return;
}
+ if (msm_dp_display->active_stream_cnt) {
+ drm_dbg_dp(msm_dp->drm_dev, "stream still active, return\n");
+ return;
+ }
+
/* dongle is still connected but sinks are disconnected */
if (msm_dp_display->link->sink_count == 0)
msm_dp_ctrl_psm_config(msm_dp_display->ctrl);
@@ -20,7 +20,6 @@ struct msm_dp {
struct drm_bridge *next_bridge;
bool link_ready;
bool audio_enabled;
- bool power_on;
bool prepared;
bool mst_active;
unsigned int connector_type;
@@ -67,4 +66,6 @@ void msm_dp_display_atomic_post_disable_helper(struct msm_dp *msm_dp,
void msm_dp_display_unprepare(struct msm_dp *dp);
+int msm_dp_display_get_active_stream_cnt(struct msm_dp *msm_dp);
+
#endif /* _DP_DISPLAY_H_ */
For DP MST, the link clock and power domain resources stay on until both streams have been disabled OR we receive hotplug. Introduce an active_stream_cnt to track the number of active streams and necessary state handling. Replace the power_on variable with active_stream_cnt as power_on boolean works only for a single stream. Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com> --- drivers/gpu/drm/msm/dp/dp_audio.c | 2 +- drivers/gpu/drm/msm/dp/dp_display.c | 42 ++++++++++++++++++++++++------------- drivers/gpu/drm/msm/dp/dp_display.h | 3 ++- 3 files changed, 31 insertions(+), 16 deletions(-)