This is a note to let you know that I've just added the patch titled
drm/i915: always update ELD connector type after get modes
to the 4.13-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-i915-always-update-eld-connector-type-after-get-modes.patch
and it can be found in the queue-4.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2d8f63297b9f0b430c96329893667c0bfdcbd47e Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@xxxxxxxxx>
Date: Tue, 19 Sep 2017 18:38:13 +0300
Subject: drm/i915: always update ELD connector type after get modes
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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From: Jani Nikula <jani.nikula@xxxxxxxxx>
commit 2d8f63297b9f0b430c96329893667c0bfdcbd47e upstream.
drm_edid_to_eld() initializes the connector ELD to zero, overwriting the
ELD connector type initialized in intel_audio_codec_enable(). If
userspace does getconnector and thus get_modes after modeset, a
subsequent audio component i915_audio_component_get_eld() call will
receive an ELD without the connector type properly set. It's fine for
HDMI, but screws up audio for DP.
Always set the ELD connector type at intel_connector_update_modes()
based on the connector type. We can drop the connector type update from
intel_audio_codec_enable().
Credits to Joseph Nuzman <jnuzman@xxxxxxxxx> for figuring this out.
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: Joseph Nuzman <jnuzman@xxxxxxxxx>
Reported-by: Joseph Nuzman <jnuzman@xxxxxxxxx>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101583
Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Tested-by: Joseph Nuzman <jnuzman@xxxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20170919153813.29808-1-jani.nikula@xxxxxxxxx
(cherry picked from commit d81fb7fd9436e81fda67e5bc8ed0713aa28d3db2)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_audio.c | 5 -----
drivers/gpu/drm/i915/intel_modes.c | 17 +++++++++++++++++
2 files changed, 17 insertions(+), 5 deletions(-)
--- a/drivers/gpu/drm/i915/intel_audio.c
+++ b/drivers/gpu/drm/i915/intel_audio.c
@@ -606,11 +606,6 @@ void intel_audio_codec_enable(struct int
connector->encoder->base.id,
connector->encoder->name);
- /* ELD Conn_Type */
- connector->eld[5] &= ~(3 << 2);
- if (intel_crtc_has_dp_encoder(crtc_state))
- connector->eld[5] |= (1 << 2);
-
connector->eld[6] = drm_av_sync_delay(connector, adjusted_mode) / 2;
if (dev_priv->display.audio_codec_enable)
--- a/drivers/gpu/drm/i915/intel_modes.c
+++ b/drivers/gpu/drm/i915/intel_modes.c
@@ -30,6 +30,21 @@
#include "intel_drv.h"
#include "i915_drv.h"
+static void intel_connector_update_eld_conn_type(struct drm_connector *connector)
+{
+ u8 conn_type;
+
+ if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
+ connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
+ conn_type = DRM_ELD_CONN_TYPE_DP;
+ } else {
+ conn_type = DRM_ELD_CONN_TYPE_HDMI;
+ }
+
+ connector->eld[DRM_ELD_SAD_COUNT_CONN_TYPE] &= ~DRM_ELD_CONN_TYPE_MASK;
+ connector->eld[DRM_ELD_SAD_COUNT_CONN_TYPE] |= conn_type;
+}
+
/**
* intel_connector_update_modes - update connector from edid
* @connector: DRM connector device to use
@@ -44,6 +59,8 @@ int intel_connector_update_modes(struct
ret = drm_add_edid_modes(connector, edid);
drm_edid_to_eld(connector, edid);
+ intel_connector_update_eld_conn_type(connector);
+
return ret;
}
Patches currently in stable-queue which might be from jani.nikula@xxxxxxxxx are
queue-4.13/drm-i915-always-update-eld-connector-type-after-get-modes.patch
queue-4.13/drm-i915-bios-ignore-hdmi-on-port-a.patch