* [PATCH] Revert "drm/amd/display: To modify the condition in indicating branch device"
@ 2021-03-24 1:24 Alex Deucher
0 siblings, 0 replies; 3+ messages in thread
From: Alex Deucher @ 2021-03-24 1:24 UTC (permalink / raw)
To: amd-gfx; +Cc: Alex Deucher, Martin Tsai, Bindu Ramamurthy
This breaks HDMI audio.
This reverts commit 9413b23fadad3861f5afd626ac44ef83ad8068ab.
Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1536
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: Martin Tsai <martin.tsai@amd.com>
Cc: Bindu Ramamurthy <bindu.r@amd.com>
---
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
index 484d96f78ade..18adf4ea6044 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
@@ -3192,7 +3192,13 @@ static void get_active_converter_info(
}
/* DPCD 0x5 bit 0 = 1, it indicate it's branch device */
- link->dpcd_caps.is_branch_dev = ds_port.fields.PORT_PRESENT;
+ if (ds_port.fields.PORT_TYPE == DOWNSTREAM_DP) {
+ link->dpcd_caps.is_branch_dev = false;
+ }
+
+ else {
+ link->dpcd_caps.is_branch_dev = ds_port.fields.PORT_PRESENT;
+ }
switch (ds_port.fields.PORT_TYPE) {
case DOWNSTREAM_VGA:
--
2.30.2
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^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] Revert "drm/amd/display: To modify the condition in indicating branch device"
2022-01-24 14:17 Alex Deucher
@ 2022-01-24 21:39 ` Harry Wentland
0 siblings, 0 replies; 3+ messages in thread
From: Harry Wentland @ 2022-01-24 21:39 UTC (permalink / raw)
To: Alex Deucher, amd-gfx; +Cc: Siqueira, Rodrigo, Martin Tsai, Bindu Ramamurthy
On 2022-01-24 09:17, Alex Deucher wrote:
> This breaks HDMI audio.
>
Do we have more info? This is DP code, but maybe the display is connected via a DP-HDMI adapter? Or via a n MST or USB-C hub?
As Siqueira mentioned, we couldn't reproduce the issue and the original change was intended to fix an issue with some receivers. Simply reverting it would likely reintroduce that bug.
Harry
> This reverts commit 9413b23fadad3861f5afd626ac44ef83ad8068ab.
>
> Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1536
> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
> Cc: Martin Tsai <martin.tsai@amd.com>
> Cc: Bindu Ramamurthy <bindu.r@amd.com>
> ---
> drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 8 +++++++-
> 1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
> index 6f6929435885..eb4432dca761 100644
> --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
> +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
> @@ -5039,7 +5039,13 @@ static void get_active_converter_info(
> }
>
> /* DPCD 0x5 bit 0 = 1, it indicate it's branch device */
> - link->dpcd_caps.is_branch_dev = ds_port.fields.PORT_PRESENT;
> + if (ds_port.fields.PORT_TYPE == DOWNSTREAM_DP) {
> + link->dpcd_caps.is_branch_dev = false;
> + }
> +
> + else {
> + link->dpcd_caps.is_branch_dev = ds_port.fields.PORT_PRESENT;
> + }
>
> switch (ds_port.fields.PORT_TYPE) {
> case DOWNSTREAM_VGA:
^ permalink raw reply [flat|nested] 3+ messages in thread
* [PATCH] Revert "drm/amd/display: To modify the condition in indicating branch device"
@ 2022-01-24 14:17 Alex Deucher
2022-01-24 21:39 ` Harry Wentland
0 siblings, 1 reply; 3+ messages in thread
From: Alex Deucher @ 2022-01-24 14:17 UTC (permalink / raw)
To: amd-gfx; +Cc: Alex Deucher, Martin Tsai, Bindu Ramamurthy
This breaks HDMI audio.
This reverts commit 9413b23fadad3861f5afd626ac44ef83ad8068ab.
Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1536
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: Martin Tsai <martin.tsai@amd.com>
Cc: Bindu Ramamurthy <bindu.r@amd.com>
---
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
index 6f6929435885..eb4432dca761 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
@@ -5039,7 +5039,13 @@ static void get_active_converter_info(
}
/* DPCD 0x5 bit 0 = 1, it indicate it's branch device */
- link->dpcd_caps.is_branch_dev = ds_port.fields.PORT_PRESENT;
+ if (ds_port.fields.PORT_TYPE == DOWNSTREAM_DP) {
+ link->dpcd_caps.is_branch_dev = false;
+ }
+
+ else {
+ link->dpcd_caps.is_branch_dev = ds_port.fields.PORT_PRESENT;
+ }
switch (ds_port.fields.PORT_TYPE) {
case DOWNSTREAM_VGA:
--
2.34.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
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2021-03-24 1:24 [PATCH] Revert "drm/amd/display: To modify the condition in indicating branch device" Alex Deucher
2022-01-24 14:17 Alex Deucher
2022-01-24 21:39 ` Harry Wentland
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