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 abhinavk@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);