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* [PATCH] drm/display: add hw_params callback function to drm_connector_hdmi_audio_ops
@ 2025-09-24  8:57 Jianfeng Liu
  2025-09-24 20:17 ` Dmitry Baryshkov
  0 siblings, 1 reply; 8+ messages in thread
From: Jianfeng Liu @ 2025-09-24  8:57 UTC (permalink / raw)
  To: linux-arm-msm
  Cc: Xilin Wu, Jianfeng Liu, Abhinav Kumar, David Airlie,
	Dmitry Baryshkov, Maarten Lankhorst, Mark Brown, Maxime Ripard,
	Simona Vetter, Thomas Zimmermann, dri-devel, linux-kernel

After reusing drm_hdmi_audio_* helpers and drm_bridge_connector
integration in drm/msm/dp, we have dropped msm_dp_audio_hw_params and
use msm_dp_audio_prepare instead. While userspace is still calling
hw_params to do audio initialization, and we get the following errors:

[ 784.904566] qcom-apm gprsvc:service:2:1: Error (1) Processing 0x01001002 cmd
[ 784.912185] qcom-apm gprsvc:service:2:1: DSP returned error[1001002] 1
[ 784.918927] q6apm-lpass-dais 3700000.remoteproc:glink-edge:gpr:service@1:bedais: Failed to start APM port 104
[ 784.929947] q6apm-lpass-dais 3700000.remoteproc:glink-edge:gpr:service@1:bedais: ASoC error (-22): at snd_soc_dai_prepare() on DISPLAY_PORT_RX_0

msm_dp_audio_prepare is not called because hdmi-codec driver only checks
and runs hw_params. This commit will add hw_params callback function
same as drm_connector_hdmi_audio_prepare, so that hdmi-codec driver can
work with userspace alsa.

Tested with Radxa Dragon Q6A.

Fixes: 98a8920e7b07 ("drm/msm/dp: reuse generic HDMI codec implementation")

Signed-off-by: Jianfeng Liu <liujianfeng1994@gmail.com>
---

 drivers/gpu/drm/display/drm_hdmi_audio_helper.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/display/drm_hdmi_audio_helper.c b/drivers/gpu/drm/display/drm_hdmi_audio_helper.c
index 7d78b02c1446..6ca1c7ad0632 100644
--- a/drivers/gpu/drm/display/drm_hdmi_audio_helper.c
+++ b/drivers/gpu/drm/display/drm_hdmi_audio_helper.c
@@ -130,6 +130,7 @@ EXPORT_SYMBOL(drm_connector_hdmi_audio_plugged_notify);
 
 static const struct hdmi_codec_ops drm_connector_hdmi_audio_ops = {
 	.audio_startup = drm_connector_hdmi_audio_startup,
+	.hw_params = drm_connector_hdmi_audio_prepare,
 	.prepare = drm_connector_hdmi_audio_prepare,
 	.audio_shutdown = drm_connector_hdmi_audio_shutdown,
 	.mute_stream = drm_connector_hdmi_audio_mute_stream,
-- 
2.43.0


^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2025-09-25  3:43 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2025-09-24  8:57 [PATCH] drm/display: add hw_params callback function to drm_connector_hdmi_audio_ops Jianfeng Liu
2025-09-24 20:17 ` Dmitry Baryshkov
2025-09-25  1:51   ` Jianfeng Liu
2025-09-25  2:18     ` Dmitry Baryshkov
2025-09-25  2:57       ` Jianfeng Liu
2025-09-25  3:08         ` Dmitry Baryshkov
2025-09-25  3:23           ` Jianfeng Liu
2025-09-25  3:43             ` Dmitry Baryshkov

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