Add the hook_plugged_cb op for the MSM DP driver to signal connect
and disconnect events to the hdmi-codec driver which in-turn shall
notify the audio subsystem to start a new or teardown an existing
session.
Signed-off-by: Abhinav Kumar <abhin...@codeaurora.org>
---
drivers/gpu/drm/msm/dp/dp_audio.c | 25 ++++++++++++++++++++++++-
drivers/gpu/drm/msm/dp/dp_display.c | 25 +++++++++++++++++++++++++
drivers/gpu/drm/msm/dp/dp_display.h | 7 +++++++
3 files changed, 56 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/msm/dp/dp_audio.c
b/drivers/gpu/drm/msm/dp/dp_audio.c
index 75556eea1059..11fa5ad7a801 100644
--- a/drivers/gpu/drm/msm/dp/dp_audio.c
+++ b/drivers/gpu/drm/msm/dp/dp_audio.c
@@ -10,7 +10,6 @@
#include <drm/drm_dp_helper.h>
#include <drm/drm_edid.h>
-#include <sound/hdmi-codec.h>
#include "dp_catalog.h"
#include "dp_audio.h"
@@ -442,6 +441,29 @@ static struct dp_audio_private *dp_audio_get_data(struct
platform_device *pdev)
return container_of(dp_audio, struct dp_audio_private, dp_audio);
}
+static int dp_audio_hook_plugged_cb(struct device *dev, void *data,
+ hdmi_codec_plugged_cb fn,
+ struct device *codec_dev)
+{
+
+ struct platform_device *pdev;
+ struct msm_dp *dp_display;
+
+ pdev = to_platform_device(dev);
+ if (!pdev) {
+ pr_err("invalid input\n");
+ return -ENODEV;
+ }
+
+ dp_display = platform_get_drvdata(pdev);
+ if (!dp_display) {
+ pr_err("invalid input\n");
+ return -ENODEV;
+ }
+
+ return dp_display_set_plugged_cb(dp_display, fn, codec_dev);
+}
+
static int dp_audio_get_eld(struct device *dev,
void *data, uint8_t *buf, size_t len)
{
@@ -513,6 +535,7 @@ static const struct hdmi_codec_ops dp_audio_codec_ops = {
.hw_params = dp_audio_hw_params,
.audio_shutdown = dp_audio_shutdown,
.get_eld = dp_audio_get_eld,
+ .hook_plugged_cb = dp_audio_hook_plugged_cb,
};
static struct hdmi_codec_pdata codec_data = {
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c
b/drivers/gpu/drm/msm/dp/dp_display.c
index 0e3e13337d23..302cf7ea65d7 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -711,6 +711,13 @@ static int dp_display_prepare(struct msm_dp *dp)
return 0;
}
+static void dp_display_handle_plugged_change(struct msm_dp *dp_display,
+ bool plugged)
+{
+ if (dp_display->plugged_cb && dp_display->codec_dev)
+ dp_display->plugged_cb(dp_display->codec_dev, plugged);
+}
+
static int dp_display_enable(struct dp_display_private *dp, u32 data)
{
int rc = 0;
@@ -741,6 +748,8 @@ static int dp_display_post_enable(struct msm_dp *dp_display)
dp->audio->lane_count = dp->link->link_params.num_lanes;
}
+ /* signal the connect event late to synchronize video and display */
+ dp_display_handle_plugged_change(dp_display, true);
return 0;
}
@@ -750,6 +759,9 @@ static int dp_display_pre_disable(struct msm_dp *dp_display)
dp = container_of(dp_display, struct dp_display_private, dp_display);
+ /* signal the disconnect event early to ensure proper teardown */
+ dp_display_handle_plugged_change(dp_display, false);
+
return 0;
}
@@ -772,6 +784,19 @@ static int dp_display_unprepare(struct msm_dp *dp)
return 0;
}
+int dp_display_set_plugged_cb(struct msm_dp *dp_display,
+ hdmi_codec_plugged_cb fn, struct device *codec_dev)
+{
+ bool plugged;
+
+ dp_display->plugged_cb = fn;
+ dp_display->codec_dev = codec_dev;
+ plugged = dp_display->is_connected;
+ dp_display_handle_plugged_change(dp_display, plugged);
+
+ return 0;
+}
+
int dp_display_validate_mode(struct msm_dp *dp, u32 mode_pclk_khz)
{
const u32 num_components = 3, default_bpp = 24;
diff --git a/drivers/gpu/drm/msm/dp/dp_display.h
b/drivers/gpu/drm/msm/dp/dp_display.h
index 1e0d2b9d9a2a..5020faf360db 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.h
+++ b/drivers/gpu/drm/msm/dp/dp_display.h
@@ -7,18 +7,25 @@
#define _DP_DISPLAY_H_
#include "dp_panel.h"
+#include <sound/hdmi-codec.h>
struct msm_dp {
struct drm_device *drm_dev;
+ struct device *codec_dev;
struct drm_connector *connector;
struct drm_encoder *encoder;
bool is_connected;
+
+ hdmi_codec_plugged_cb plugged_cb;
+
u32 max_pclk_khz;
u32 max_dp_lanes;
struct dp_audio *dp_audio;
};
+int dp_display_set_plugged_cb(struct msm_dp *dp_display,
+ hdmi_codec_plugged_cb fn, struct device *codec_dev);
int dp_display_validate_mode(struct msm_dp *dp_display, u32 mode_pclk_khz);
int dp_display_get_modes(struct msm_dp *dp_display,
struct dp_display_mode *dp_mode);
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
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