[RFC PATCH 2/2] drm/amd/display: switch amdgpu_dm_connector to use struct drm_edid
Melissa Wen
mwen at igalia.com
Mon Feb 5 14:33:55 UTC 2024
On 01/26, Alex Hung wrote:
>
>
> On 2024-01-26 09:28, Melissa Wen wrote:
> > Replace raw edid handling (struct edid) with the opaque EDID type
> > (struct drm_edid) on amdgpu_dm_connector for consistency. It may also
> > prevent mismatch of approaches in different parts of the driver code.
> > Working in progress. There are a couple of cast warnings and it was only
> > tested with IGT.
> >
> > Signed-off-by: Melissa Wen <mwen at igalia.com>
> > ---
> > .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 63 ++++++++++---------
> > .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 4 +-
> > .../amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 9 +--
> > .../display/amdgpu_dm/amdgpu_dm_mst_types.c | 23 +++----
> > 4 files changed, 51 insertions(+), 48 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 68e71e2ea472..741081d73bb3 100644
> > --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> > +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> > @@ -3277,12 +3277,12 @@ void amdgpu_dm_update_connector_after_detect(
> > &aconnector->dm_dp_aux.aux);
> > }
> > } else {
> > - aconnector->edid =
> > - (struct edid *)sink->dc_edid.raw_edid;
> > + const struct edid *edid = (const struct edid *)sink->dc_edid.raw_edid;
> > + aconnector->edid = drm_edid_alloc(edid, (edid->extensions + 1) * EDID_LENGTH);
> > if (aconnector->dc_link->aux_mode)
> > drm_dp_cec_set_edid(&aconnector->dm_dp_aux.aux,
> > - aconnector->edid);
> > + drm_edid_raw(aconnector->edid));
> > }
> > if (!aconnector->timing_requested) {
> > @@ -3293,13 +3293,13 @@ void amdgpu_dm_update_connector_after_detect(
> > "failed to create aconnector->requested_timing\n");
> > }
> > - drm_connector_update_edid_property(connector, aconnector->edid);
> > + drm_edid_connector_update(connector, aconnector->edid);
> > amdgpu_dm_update_freesync_caps(connector, aconnector->edid);
> > update_connector_ext_caps(aconnector);
> > } else {
> > drm_dp_cec_unset_edid(&aconnector->dm_dp_aux.aux);
> > amdgpu_dm_update_freesync_caps(connector, NULL);
> > - drm_connector_update_edid_property(connector, NULL);
> > + drm_edid_connector_update(connector, NULL);
> > aconnector->num_modes = 0;
> > dc_sink_release(aconnector->dc_sink);
> > aconnector->dc_sink = NULL;
> > @@ -6564,7 +6564,6 @@ static void amdgpu_dm_connector_funcs_force(struct drm_connector *connector)
> > struct dc_link *dc_link = aconnector->dc_link;
> > struct dc_sink *dc_em_sink = aconnector->dc_em_sink;
> > const struct drm_edid *drm_edid;
> > - const struct edid *edid;
> > /*
> > * Note: drm_get_edid gets edid in the following order:
> > @@ -6578,11 +6577,12 @@ static void amdgpu_dm_connector_funcs_force(struct drm_connector *connector)
> > DRM_ERROR("No EDID found on connector: %s.\n", connector->name);
> > return;
> > }
> > - edid = drm_edid_raw(drm_edid);
> > - aconnector->edid = edid;
> > -
> > + aconnector->edid = drm_edid;
> > + drm_edid_connector_update(connector, drm_edid);
> > /* Update emulated (virtual) sink's EDID */
> > if (dc_em_sink && dc_link) {
> > + const struct edid *edid = drm_edid_raw(drm_edid);
> > +
> > memset(&dc_em_sink->edid_caps, 0, sizeof(struct dc_edid_caps));
> > memmove(dc_em_sink->dc_edid.raw_edid, (uint8_t *)edid, (edid->extensions + 1) * EDID_LENGTH);
> > dm_helpers_parse_edid_caps(
> > @@ -6633,13 +6633,13 @@ static void create_eml_sink(struct amdgpu_dm_connector *aconnector)
> > return;
> > }
> > - edid = drm_edid_raw(drm_edid);
> > -
> > - if (drm_detect_hdmi_monitor(edid))
> > + if (connector->display_info.is_hdmi)
> > init_params.sink_signal = SIGNAL_TYPE_HDMI_TYPE_A;
> > - aconnector->edid = edid;
> > + aconnector->edid = drm_edid;
> > + drm_edid_connector_update(connector, drm_edid);
> > + edid = drm_edid_raw(drm_edid);
> > aconnector->dc_em_sink = dc_link_add_remote_sink(
> > aconnector->dc_link,
> > (uint8_t *)edid,
> > @@ -7322,16 +7322,16 @@ static void amdgpu_set_panel_orientation(struct drm_connector *connector)
> > }
> > static void amdgpu_dm_connector_ddc_get_modes(struct drm_connector *connector,
> > - struct edid *edid)
> > + const struct drm_edid *drm_edid)
> > {
> > struct amdgpu_dm_connector *amdgpu_dm_connector =
> > to_amdgpu_dm_connector(connector);
> > - if (edid) {
> > + if (drm_edid) {
> > /* empty probed_modes */
> > INIT_LIST_HEAD(&connector->probed_modes);
> > amdgpu_dm_connector->num_modes =
> > - drm_add_edid_modes(connector, edid);
> > + drm_edid_connector_add_modes(connector);
> > /* sorting the probed modes before calling function
> > * amdgpu_dm_get_native_mode() since EDID can have
> > @@ -7345,10 +7345,10 @@ static void amdgpu_dm_connector_ddc_get_modes(struct drm_connector *connector,
> > amdgpu_dm_get_native_mode(connector);
> > /* Freesync capabilities are reset by calling
> > - * drm_add_edid_modes() and need to be
> > + * drm_edid_connector_add_modes() and need to be
> > * restored here.
> > */
> > - amdgpu_dm_update_freesync_caps(connector, edid);
> > + amdgpu_dm_update_freesync_caps(connector, drm_edid);
> > } else {
> > amdgpu_dm_connector->num_modes = 0;
> > }
> > @@ -7444,12 +7444,12 @@ static uint add_fs_modes(struct amdgpu_dm_connector *aconnector)
> > }
> > static void amdgpu_dm_connector_add_freesync_modes(struct drm_connector *connector,
> > - struct edid *edid)
> > + const struct drm_edid *drm_edid)
> > {
> > struct amdgpu_dm_connector *amdgpu_dm_connector =
> > to_amdgpu_dm_connector(connector);
> > - if (!edid)
> > + if (!drm_edid)
> > return;
> > if (amdgpu_dm_connector->max_vfreq - amdgpu_dm_connector->min_vfreq > 10)
> > @@ -7462,23 +7462,23 @@ static int amdgpu_dm_connector_get_modes(struct drm_connector *connector)
> > struct amdgpu_dm_connector *amdgpu_dm_connector =
> > to_amdgpu_dm_connector(connector);
> > struct drm_encoder *encoder;
> > - struct edid *edid = amdgpu_dm_connector->edid;
> > + const struct drm_edid *drm_edid = amdgpu_dm_connector->edid;
> > struct dc_link_settings *verified_link_cap =
> > &amdgpu_dm_connector->dc_link->verified_link_cap;
> > const struct dc *dc = amdgpu_dm_connector->dc_link->dc;
> > encoder = amdgpu_dm_connector_to_encoder(connector);
> > - if (!drm_edid_is_valid(edid)) {
> > + if (!drm_edid_valid(drm_edid)) {
> > amdgpu_dm_connector->num_modes =
> > drm_add_modes_noedid(connector, 640, 480);
> > if (dc->link_srv->dp_get_encoding_format(verified_link_cap) == DP_128b_132b_ENCODING)
> > amdgpu_dm_connector->num_modes +=
> > drm_add_modes_noedid(connector, 1920, 1080);
> > } else {
> > - amdgpu_dm_connector_ddc_get_modes(connector, edid);
> > + amdgpu_dm_connector_ddc_get_modes(connector, drm_edid);
> > amdgpu_dm_connector_add_common_modes(encoder, connector);
> > - amdgpu_dm_connector_add_freesync_modes(connector, edid);
> > + amdgpu_dm_connector_add_freesync_modes(connector, drm_edid);
> > }
> > amdgpu_dm_fbc_init(connector);
> > @@ -11038,7 +11038,7 @@ static bool parse_edid_cea(struct amdgpu_dm_connector *aconnector,
> > }
> > static int parse_amd_vsdb(struct amdgpu_dm_connector *aconnector,
> > - struct edid *edid, struct amdgpu_hdmi_vsdb_info *vsdb_info)
> > + const struct edid *edid, struct amdgpu_hdmi_vsdb_info *vsdb_info)
> > {
> > u8 *edid_ext = NULL;
> > int i;
> > @@ -11073,7 +11073,8 @@ static int parse_amd_vsdb(struct amdgpu_dm_connector *aconnector,
> > }
> > static int parse_hdmi_amd_vsdb(struct amdgpu_dm_connector *aconnector,
> > - struct edid *edid, struct amdgpu_hdmi_vsdb_info *vsdb_info)
> > + const struct edid *edid,
> > + struct amdgpu_hdmi_vsdb_info *vsdb_info)
> > {
> > u8 *edid_ext = NULL;
> > int i;
> > @@ -11115,7 +11116,7 @@ static int parse_hdmi_amd_vsdb(struct amdgpu_dm_connector *aconnector,
> > * FreeSync parameters.
> > */
> > void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
> > - struct edid *edid)
> > + const struct drm_edid *drm_edid)
> > {
> > int i = 0;
> > struct detailed_timing *timing;
> > @@ -11125,9 +11126,9 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
> > to_amdgpu_dm_connector(connector);
> > struct dm_connector_state *dm_con_state = NULL;
> > struct dc_sink *sink;
> > -
> > struct amdgpu_device *adev = drm_to_adev(connector->dev);
> > struct amdgpu_hdmi_vsdb_info vsdb_info = {0};
> > + const struct edid *edid = drm_edid_raw(drm_edid);
>
>
> I got below compile errors:
>
> drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c: In function
> ‘amdgpu_dm_update_freesync_caps’:
> drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:11176:41: error:
> assignment discards ‘const’ qualifier from pointer target type
> [-Werror=discarded-qualifiers]
> 11176 | timing =
> &edid->detailed_timings[i];
> | ^
> drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:11221:33: error:
> assignment discards ‘const’ qualifier from pointer target type
> [-Werror=discarded-qualifiers]
> 11221 | timing = &edid->detailed_timings[i];
>
>
> and the following changes fixes it:
>
> - struct detailed_timing *timing;
> - struct detailed_non_pixel *data;
> - struct detailed_data_monitor_range *range;
> + const struct detailed_timing *timing;
> + const struct detailed_non_pixel *data;
> + const struct detailed_data_monitor_range *range;
Oh, thanks! I didn't realize this fast path to fix these warnings.
I'm considering to replace it with a drm_edid helper in the next version
and avoid handling `struct edid` in the driver.
I'll work on it for the next version.
BR,
Melissa
>
>
>
>
> > bool freesync_capable = false;
> > enum adaptive_sync_type as_type = ADAPTIVE_SYNC_TYPE_NONE;
> > @@ -11140,7 +11141,7 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
> > amdgpu_dm_connector->dc_sink :
> > amdgpu_dm_connector->dc_em_sink;
> > - if (!edid || !sink) {
> > + if (!drm_edid || !sink) {
> > dm_con_state = to_dm_connector_state(connector->state);
> > amdgpu_dm_connector->min_vfreq = 0;
> > @@ -11162,7 +11163,7 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
> > || sink->sink_signal == SIGNAL_TYPE_EDP) {
> > bool edid_check_required = false;
> > - if (edid) {
> > + if (drm_edid) {
> > edid_check_required = is_dp_capable_without_timing_msa(
> > adev->dm.dc,
> > amdgpu_dm_connector);
> > @@ -11214,7 +11215,7 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
> > amdgpu_dm_connector->as_type = ADAPTIVE_SYNC_TYPE_EDP;
> > }
> > - } else if (edid && sink->sink_signal == SIGNAL_TYPE_HDMI_TYPE_A) {
> > + } else if (drm_edid && sink->sink_signal == SIGNAL_TYPE_HDMI_TYPE_A) {
> > i = parse_hdmi_amd_vsdb(amdgpu_dm_connector, edid, &vsdb_info);
> > if (i >= 0 && vsdb_info.freesync_supported) {
> > timing = &edid->detailed_timings[i];
> > 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 9c1871b866cc..b81cf6f3713b 100644
> > --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
> > +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
> > @@ -637,7 +637,7 @@ struct amdgpu_dm_connector {
> > /* we need to mind the EDID between detect
> > and get modes due to analog/digital/tvencoder */
> > - struct edid *edid;
> > + const struct drm_edid *edid;
> > /* shared with amdgpu */
> > struct amdgpu_hpd hpd;
> > @@ -908,7 +908,7 @@ void dm_restore_drm_connector_state(struct drm_device *dev,
> > struct drm_connector *connector);
> > void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
> > - struct edid *edid);
> > + const struct drm_edid *drm_edid);
> > void amdgpu_dm_trigger_timing_sync(struct drm_device *dev);
> > diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
> > index e3915c4f8566..91006326ce6d 100644
> > --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
> > +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
> > @@ -898,7 +898,8 @@ enum dc_edid_status dm_helpers_read_local_edid(
> > struct i2c_adapter *ddc;
> > int retry = 3;
> > enum dc_edid_status edid_status;
> > - struct edid *edid;
> > + const struct drm_edid *drm_edid;
> > + const struct edid *edid;
> > if (link->aux_mode)
> > ddc = &aconnector->dm_dp_aux.aux.ddc;
> > @@ -909,8 +910,8 @@ enum dc_edid_status dm_helpers_read_local_edid(
> > * do check sum and retry to make sure read correct edid.
> > */
> > do {
> > -
> > - edid = drm_get_edid(&aconnector->base, ddc);
> > + drm_edid = drm_edid_read_ddc(connector, ddc);
> > + edid = drm_edid_raw(drm_edid);
> > /* DP Compliance Test 4.2.2.6 */
> > if (link->aux_mode && connector->edid_corrupt)
> > @@ -928,7 +929,7 @@ enum dc_edid_status dm_helpers_read_local_edid(
> > memmove(sink->dc_edid.raw_edid, (uint8_t *)edid, sink->dc_edid.length);
> > /* We don't need the original edid anymore */
> > - kfree(edid);
> > + drm_edid_free(drm_edid);
> > edid_status = dm_helpers_parse_edid_caps(
> > link,
> > 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 7075a85dd16e..cdebd0e74b26 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
> > @@ -127,7 +127,7 @@ dm_dp_mst_connector_destroy(struct drm_connector *connector)
> > dc_sink_release(aconnector->dc_sink);
> > }
> > - kfree(aconnector->edid);
> > + drm_edid_free(aconnector->edid);
> > drm_connector_cleanup(connector);
> > drm_dp_mst_put_port_malloc(aconnector->mst_output_port);
> > @@ -297,15 +297,15 @@ static int dm_dp_mst_get_modes(struct drm_connector *connector)
> > return drm_add_edid_modes(connector, NULL);
> > if (!aconnector->edid) {
> > - struct edid *edid;
> > + const struct drm_edid *drm_edid;
> > - edid = drm_dp_mst_get_edid(connector, &aconnector->mst_root->mst_mgr, aconnector->mst_output_port);
> > + drm_edid = drm_dp_mst_edid_read(connector, &aconnector->mst_root->mst_mgr, aconnector->mst_output_port);
> > - if (!edid) {
> > + if (!drm_edid) {
> > amdgpu_dm_set_mst_status(&aconnector->mst_status,
> > MST_REMOTE_EDID, false);
> > - drm_connector_update_edid_property(
> > + drm_edid_connector_update(
> > &aconnector->base,
> > NULL);
> > @@ -339,7 +339,7 @@ static int dm_dp_mst_get_modes(struct drm_connector *connector)
> > return ret;
> > }
> > - aconnector->edid = edid;
> > + aconnector->edid = drm_edid;
> > amdgpu_dm_set_mst_status(&aconnector->mst_status,
> > MST_REMOTE_EDID, true);
> > }
> > @@ -354,10 +354,12 @@ static int dm_dp_mst_get_modes(struct drm_connector *connector)
> > struct dc_sink_init_data init_params = {
> > .link = aconnector->dc_link,
> > .sink_signal = SIGNAL_TYPE_DISPLAY_PORT_MST };
> > + const struct edid *edid = drm_edid_raw(aconnector->edid);
> > +
> > dc_sink = dc_link_add_remote_sink(
> > aconnector->dc_link,
> > - (uint8_t *)aconnector->edid,
> > - (aconnector->edid->extensions + 1) * EDID_LENGTH,
> > + (uint8_t *)edid,
> > + (edid->extensions + 1) * EDID_LENGTH,
> > &init_params);
> > if (!dc_sink) {
> > @@ -411,10 +413,9 @@ static int dm_dp_mst_get_modes(struct drm_connector *connector)
> > }
> > }
> > - drm_connector_update_edid_property(
> > - &aconnector->base, aconnector->edid);
> > + drm_edid_connector_update(&aconnector->base, aconnector->edid);
> > - ret = drm_add_edid_modes(connector, aconnector->edid);
> > + ret = drm_edid_connector_add_modes(connector);
> > return ret;
> > }
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