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Message-Id: <20250505223922.2682012-305-sashal@kernel.org>
Date: Mon, 5 May 2025 18:36:21 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
stable@...r.kernel.org
Cc: Harry Wentland <harry.wentland@....com>,
Alex Hung <alex.hung@....com>,
Roman Li <roman.li@....com>,
Daniel Wheeler <daniel.wheeler@....com>,
Alex Deucher <alexander.deucher@....com>,
Sasha Levin <sashal@...nel.org>,
sunpeng.li@....com,
christian.koenig@....com,
airlied@...il.com,
simona@...ll.ch,
mario.limonciello@....com,
chiahsuan.chung@....com,
sunil.khatri@....com,
aurabindo.pillai@....com,
Yilin.Chen@....com,
mwen@...lia.com,
Wayne.Lin@....com,
Roman.Li@....com,
hamzamahfooz@...ux.microsoft.com,
Jerry.Zuo@....com,
siqueira@...lia.com,
agustin.gutierrez@....com,
amd-gfx@...ts.freedesktop.org,
dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 6.12 305/486] drm/amd/display: Don't treat wb connector as physical in create_validate_stream_for_sink
From: Harry Wentland <harry.wentland@....com>
[ Upstream commit cbf4890c6f28fb1ad733e14613fbd33c2004bced ]
Don't try to operate on a drm_wb_connector as an amdgpu_dm_connector.
While dereferencing aconnector->base will "work" it's wrong and
might lead to unknown bad things. Just... don't.
Reviewed-by: Alex Hung <alex.hung@....com>
Signed-off-by: Harry Wentland <harry.wentland@....com>
Signed-off-by: Roman Li <roman.li@....com>
Tested-by: Daniel Wheeler <daniel.wheeler@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 26 ++++++++++++-------
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 2 +-
.../display/amdgpu_dm/amdgpu_dm_mst_types.c | 6 ++---
3 files changed, 20 insertions(+), 14 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 44ea320e4372c..beb57fe13e10b 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -7411,12 +7411,12 @@ static enum dc_status dm_validate_stream_and_context(struct dc *dc,
}
struct dc_stream_state *
-create_validate_stream_for_sink(struct amdgpu_dm_connector *aconnector,
+create_validate_stream_for_sink(struct drm_connector *connector,
const struct drm_display_mode *drm_mode,
const struct dm_connector_state *dm_state,
const struct dc_stream_state *old_stream)
{
- struct drm_connector *connector = &aconnector->base;
+ struct amdgpu_dm_connector *aconnector = NULL;
struct amdgpu_device *adev = drm_to_adev(connector->dev);
struct dc_stream_state *stream;
const struct drm_connector_state *drm_state = dm_state ? &dm_state->base : NULL;
@@ -7427,8 +7427,12 @@ create_validate_stream_for_sink(struct amdgpu_dm_connector *aconnector,
if (!dm_state)
return NULL;
- if (aconnector->dc_link->connector_signal == SIGNAL_TYPE_HDMI_TYPE_A ||
- aconnector->dc_link->dpcd_caps.dongle_type == DISPLAY_DONGLE_DP_HDMI_CONVERTER)
+ if (connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK)
+ aconnector = to_amdgpu_dm_connector(connector);
+
+ if (aconnector &&
+ (aconnector->dc_link->connector_signal == SIGNAL_TYPE_HDMI_TYPE_A ||
+ aconnector->dc_link->dpcd_caps.dongle_type == DISPLAY_DONGLE_DP_HDMI_CONVERTER))
bpc_limit = 8;
do {
@@ -7440,10 +7444,11 @@ create_validate_stream_for_sink(struct amdgpu_dm_connector *aconnector,
break;
}
- if (aconnector->base.connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
+ dc_result = dc_validate_stream(adev->dm.dc, stream);
+
+ if (!aconnector) /* writeback connector */
return stream;
- dc_result = dc_validate_stream(adev->dm.dc, stream);
if (dc_result == DC_OK && stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST)
dc_result = dm_dp_mst_is_port_support_mode(aconnector, stream);
@@ -7473,7 +7478,7 @@ create_validate_stream_for_sink(struct amdgpu_dm_connector *aconnector,
__func__, __LINE__);
aconnector->force_yuv420_output = true;
- stream = create_validate_stream_for_sink(aconnector, drm_mode,
+ stream = create_validate_stream_for_sink(connector, drm_mode,
dm_state, old_stream);
aconnector->force_yuv420_output = false;
}
@@ -7488,6 +7493,9 @@ enum drm_mode_status amdgpu_dm_connector_mode_valid(struct drm_connector *connec
struct dc_sink *dc_sink;
/* TODO: Unhardcode stream count */
struct dc_stream_state *stream;
+ /* we always have an amdgpu_dm_connector here since we got
+ * here via the amdgpu_dm_connector_helper_funcs
+ */
struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
if ((mode->flags & DRM_MODE_FLAG_INTERLACE) ||
@@ -7512,7 +7520,7 @@ enum drm_mode_status amdgpu_dm_connector_mode_valid(struct drm_connector *connec
drm_mode_set_crtcinfo(mode, 0);
- stream = create_validate_stream_for_sink(aconnector, mode,
+ stream = create_validate_stream_for_sink(connector, mode,
to_dm_connector_state(connector->state),
NULL);
if (stream) {
@@ -10532,7 +10540,7 @@ static int dm_update_crtc_state(struct amdgpu_display_manager *dm,
if (!drm_atomic_crtc_needs_modeset(new_crtc_state))
goto skip_modeset;
- new_stream = create_validate_stream_for_sink(aconnector,
+ new_stream = create_validate_stream_for_sink(connector,
&new_crtc_state->mode,
dm_new_conn_state,
dm_old_crtc_state->stream);
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
index 20ad72d1b0d9b..9603352ee0949 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
@@ -987,7 +987,7 @@ int amdgpu_dm_process_dmub_set_config_sync(struct dc_context *ctx, unsigned int
struct set_config_cmd_payload *payload, enum set_config_status *operation_result);
struct dc_stream_state *
- create_validate_stream_for_sink(struct amdgpu_dm_connector *aconnector,
+ create_validate_stream_for_sink(struct drm_connector *connector,
const struct drm_display_mode *drm_mode,
const struct dm_connector_state *dm_state,
const struct dc_stream_state *old_stream);
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index 5bdf44c692180..9798d4bcb098f 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -1620,7 +1620,6 @@ int pre_validate_dsc(struct drm_atomic_state *state,
if (ind >= 0) {
struct drm_connector *connector;
- struct amdgpu_dm_connector *aconnector;
struct drm_connector_state *drm_new_conn_state;
struct dm_connector_state *dm_new_conn_state;
struct dm_crtc_state *dm_old_crtc_state;
@@ -1628,15 +1627,14 @@ int pre_validate_dsc(struct drm_atomic_state *state,
connector =
amdgpu_dm_find_first_crtc_matching_connector(state,
state->crtcs[ind].ptr);
- aconnector = to_amdgpu_dm_connector(connector);
drm_new_conn_state =
drm_atomic_get_new_connector_state(state,
- &aconnector->base);
+ connector);
dm_new_conn_state = to_dm_connector_state(drm_new_conn_state);
dm_old_crtc_state = to_dm_crtc_state(state->crtcs[ind].old_state);
local_dc_state->streams[i] =
- create_validate_stream_for_sink(aconnector,
+ create_validate_stream_for_sink(connector,
&state->crtcs[ind].new_state->mode,
dm_new_conn_state,
dm_old_crtc_state->stream);
--
2.39.5
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