[PATCH] drm/amdgpu/display: create fake mst encoders ahead of time (v4)
Alex Deucher
alexdeucher at gmail.com
Fri Jul 10 15:50:51 UTC 2020
Prevents a warning in the MST create connector case.
v2: create global fake encoders rather per connector fake encoders
to avoid running out of encoder indices.
v3: use the actual number of crtcs on the asic rather than the max
to conserve encoders.
v4: v3 plus missing hunk I forgot to git add.
Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1108
Fixes: c6385e503aeaf9 ("drm/amdgpu: drop legacy drm load and unload callbacks")
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 9 ++++
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 11 +++-
.../display/amdgpu_dm/amdgpu_dm_mst_types.c | 53 +++++++++----------
.../display/amdgpu_dm/amdgpu_dm_mst_types.h | 3 ++
4 files changed, 48 insertions(+), 28 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 0e5d99a85307..6f937e25a62c 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -978,6 +978,9 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
/* Update the actual used number of crtc */
adev->mode_info.num_crtc = adev->dm.display_indexes_num;
+ /* create fake encoders for MST */
+ dm_dp_create_fake_mst_encoders(adev);
+
/* TODO: Add_display_info? */
/* TODO use dynamic cursor width */
@@ -1001,6 +1004,12 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
static void amdgpu_dm_fini(struct amdgpu_device *adev)
{
+ int i;
+
+ for (i = 0; i < adev->dm.display_indexes_num; i++) {
+ drm_encoder_cleanup(&adev->dm.mst_encoders[i].base);
+ }
+
amdgpu_dm_audio_fini(adev);
amdgpu_dm_destroy_drm_device(&adev->dm);
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 86c132ddc452..3f50328fe537 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
@@ -43,6 +43,9 @@
*/
#define AMDGPU_DM_MAX_DISPLAY_INDEX 31
+
+#define AMDGPU_DM_MAX_CRTC 6
+
/*
#include "include/amdgpu_dal_power_if.h"
#include "amdgpu_dm_irq.h"
@@ -330,6 +333,13 @@ struct amdgpu_display_manager {
* available in FW
*/
const struct gpu_info_soc_bounding_box_v1_0 *soc_bounding_box;
+
+ /**
+ * @mst_encoders:
+ *
+ * fake encoders used for DP MST.
+ */
+ struct amdgpu_encoder mst_encoders[AMDGPU_DM_MAX_CRTC];
};
struct amdgpu_dm_connector {
@@ -358,7 +368,6 @@ struct amdgpu_dm_connector {
struct amdgpu_dm_dp_aux dm_dp_aux;
struct drm_dp_mst_port *port;
struct amdgpu_dm_connector *mst_port;
- struct amdgpu_encoder *mst_encoder;
struct drm_dp_aux *dsc_aux;
/* TODO see if we can merge with ddc_bus or make a dm_connector */
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 cf15248739f7..0affd1997fe7 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
@@ -95,7 +95,6 @@ dm_dp_mst_connector_destroy(struct drm_connector *connector)
{
struct amdgpu_dm_connector *aconnector =
to_amdgpu_dm_connector(connector);
- struct amdgpu_encoder *amdgpu_encoder = aconnector->mst_encoder;
if (aconnector->dc_sink) {
dc_link_remove_remote_sink(aconnector->dc_link,
@@ -105,8 +104,6 @@ dm_dp_mst_connector_destroy(struct drm_connector *connector)
kfree(aconnector->edid);
- drm_encoder_cleanup(&amdgpu_encoder->base);
- kfree(amdgpu_encoder);
drm_connector_cleanup(connector);
drm_dp_mst_put_port_malloc(aconnector->port);
kfree(aconnector);
@@ -243,7 +240,11 @@ static struct drm_encoder *
dm_mst_atomic_best_encoder(struct drm_connector *connector,
struct drm_connector_state *connector_state)
{
- return &to_amdgpu_dm_connector(connector)->mst_encoder->base;
+ struct drm_device *dev = connector->dev;
+ struct amdgpu_device *adev = dev->dev_private;
+ struct amdgpu_crtc *acrtc = to_amdgpu_crtc(connector_state->crtc);
+
+ return &adev->dm.mst_encoders[acrtc->crtc_id].base;
}
static int
@@ -306,31 +307,27 @@ static const struct drm_encoder_funcs amdgpu_dm_encoder_funcs = {
.destroy = amdgpu_dm_encoder_destroy,
};
-static struct amdgpu_encoder *
-dm_dp_create_fake_mst_encoder(struct amdgpu_dm_connector *connector)
+void
+dm_dp_create_fake_mst_encoders(struct amdgpu_device *adev)
{
- struct drm_device *dev = connector->base.dev;
- struct amdgpu_device *adev = dev->dev_private;
- struct amdgpu_encoder *amdgpu_encoder;
- struct drm_encoder *encoder;
-
- amdgpu_encoder = kzalloc(sizeof(*amdgpu_encoder), GFP_KERNEL);
- if (!amdgpu_encoder)
- return NULL;
+ struct drm_device *dev = adev->ddev;
+ int i;
- encoder = &amdgpu_encoder->base;
- encoder->possible_crtcs = amdgpu_dm_get_encoder_crtc_mask(adev);
+ for (i = 0; i < adev->dm.display_indexes_num; i++) {
+ struct amdgpu_encoder *amdgpu_encoder = &adev->dm.mst_encoders[i];
+ struct drm_encoder *encoder = &amdgpu_encoder->base;
- drm_encoder_init(
- dev,
- &amdgpu_encoder->base,
- &amdgpu_dm_encoder_funcs,
- DRM_MODE_ENCODER_DPMST,
- NULL);
+ encoder->possible_crtcs = amdgpu_dm_get_encoder_crtc_mask(adev);
- drm_encoder_helper_add(encoder, &amdgpu_dm_encoder_helper_funcs);
+ drm_encoder_init(
+ dev,
+ &amdgpu_encoder->base,
+ &amdgpu_dm_encoder_funcs,
+ DRM_MODE_ENCODER_DPMST,
+ NULL);
- return amdgpu_encoder;
+ drm_encoder_helper_add(encoder, &amdgpu_dm_encoder_helper_funcs);
+ }
}
static struct drm_connector *
@@ -343,6 +340,7 @@ dm_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
struct amdgpu_device *adev = dev->dev_private;
struct amdgpu_dm_connector *aconnector;
struct drm_connector *connector;
+ int i;
aconnector = kzalloc(sizeof(*aconnector), GFP_KERNEL);
if (!aconnector)
@@ -369,9 +367,10 @@ dm_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
master->dc_link,
master->connector_id);
- aconnector->mst_encoder = dm_dp_create_fake_mst_encoder(master);
- drm_connector_attach_encoder(&aconnector->base,
- &aconnector->mst_encoder->base);
+ for (i = 0; i < adev->dm.display_indexes_num; i++) {
+ drm_connector_attach_encoder(&aconnector->base,
+ &adev->dm.mst_encoders[i].base);
+ }
connector->max_bpc_property = master->base.max_bpc_property;
if (connector->max_bpc_property)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.h
index d2c56579a2cc..b38bd68121ce 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.h
@@ -35,6 +35,9 @@ void amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm,
struct amdgpu_dm_connector *aconnector,
int link_index);
+void
+dm_dp_create_fake_mst_encoders(struct amdgpu_device *adev);
+
#if defined(CONFIG_DRM_AMD_DC_DCN)
bool compute_mst_dsc_configs_for_state(struct drm_atomic_state *state,
struct dc_state *dc_state);
--
2.25.4
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