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Code

drm/i915/dp: Fix connector DSC HW state readout

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The DSC HW state of DP connectors is read out during driver loading and
system resume in intel_modeset_update_connector_atomic_state(). This
function is called for all connectors though and so the state of DSI
connectors will also get updated incorrectly, triggering a WARN there
wrt. the DSC decompression AUX device.

Fix the above by moving the DSC state readout to a new DP connector
specific sync_state() hook. This is anyway the logical place to update
the connector object's state vs. the connector's atomic state.

Fixes: b2608c6b32 ("drm/i915/dp_mst: Enable MST DSC decompression for all streams")
Reported-and-tested-by: Drew Davenport <ddavenport@chromium.org>
Closes: https://lore.kernel.org/all/Zb0q8IDVXS0HxJyj@chromium.org
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240205132631.1588577-1-imre.deak@intel.com
(cherry picked from commit a62e145981)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
This commit is contained in:
Imre Deak 2024-02-05 15:26:31 +02:00 committed by Joonas Lahtinen
parent 26d2b757ff
commit 0848814aa2
5 changed files with 29 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/gpu/drm/i915/display/intel_display_types.h
View File

@ -609,6 +609,13 @@ struct intel_connector {
* and active (i.e. dpms ON state). */
bool (*get_hw_state)(struct intel_connector *);
/*
* Optional hook called during init/resume to sync any state
* stored in the connector (eg. DSC state) wrt. the HW state.
*/
void (*sync_state)(struct intel_connector *connector,
const struct intel_crtc_state *crtc_state);
/* Panel info for eDP and LVDS */
struct intel_panel panel;

13
drivers/gpu/drm/i915/display/intel_dp.c
View File

@ -5859,6 +5859,19 @@ intel_dp_connector_unregister(struct drm_connector *connector)
intel_connector_unregister(connector);
}
void intel_dp_connector_sync_state(struct intel_connector *connector,
const struct intel_crtc_state *crtc_state)
{
struct drm_i915_private *i915 = to_i915(connector->base.dev);
if (crtc_state && crtc_state->dsc.compression_enable) {
drm_WARN_ON(&i915->drm, !connector->dp.dsc_decompression_aux);
connector->dp.dsc_decompression_enabled = true;
} else {
connector->dp.dsc_decompression_enabled = false;
}
}
void intel_dp_encoder_flush_work(struct drm_encoder *encoder)
{
struct intel_digital_port *dig_port = enc_to_dig_port(to_intel_encoder(encoder));

2
drivers/gpu/drm/i915/display/intel_dp.h
View File

@ -45,6 +45,8 @@ bool intel_dp_limited_color_range(const struct intel_crtc_state *crtc_state,
int intel_dp_min_bpp(enum intel_output_format output_format);
bool intel_dp_init_connector(struct intel_digital_port *dig_port,
struct intel_connector *intel_connector);
void intel_dp_connector_sync_state(struct intel_connector *connector,
const struct intel_crtc_state *crtc_state);
void intel_dp_set_link_params(struct intel_dp *intel_dp,
int link_rate, int lane_count);
int intel_dp_get_link_train_fallback_values(struct intel_dp *intel_dp,

1
drivers/gpu/drm/i915/display/intel_dp_mst.c
View File

@ -1534,6 +1534,7 @@ static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topolo
return NULL;
intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
intel_connector->sync_state = intel_dp_connector_sync_state;
intel_connector->mst_port = intel_dp;
intel_connector->port = port;
drm_dp_mst_get_port_malloc(port);

13
drivers/gpu/drm/i915/display/intel_modeset_setup.c
View File

@ -318,12 +318,6 @@ static void intel_modeset_update_connector_atomic_state(struct drm_i915_private
const struct intel_crtc_state *crtc_state =
to_intel_crtc_state(crtc->base.state);
if (crtc_state->dsc.compression_enable) {
drm_WARN_ON(&i915->drm, !connector->dp.dsc_decompression_aux);
connector->dp.dsc_decompression_enabled = true;
} else {
connector->dp.dsc_decompression_enabled = false;
}
conn_state->max_bpc = (crtc_state->pipe_bpp ?: 24) / 3;
}
}
@ -775,8 +769,9 @@ static void intel_modeset_readout_hw_state(struct drm_i915_private *i915)
drm_connector_list_iter_begin(&i915->drm, &conn_iter);
for_each_intel_connector_iter(connector, &conn_iter) {
struct intel_crtc_state *crtc_state = NULL;
if (connector->get_hw_state(connector)) {
struct intel_crtc_state *crtc_state;
struct intel_crtc *crtc;
connector->base.dpms = DRM_MODE_DPMS_ON;
@ -802,6 +797,10 @@ static void intel_modeset_readout_hw_state(struct drm_i915_private *i915)
connector->base.dpms = DRM_MODE_DPMS_OFF;
connector->base.encoder = NULL;
}
if (connector->sync_state)
connector->sync_state(connector, crtc_state);
drm_dbg_kms(&i915->drm,
"[CONNECTOR:%d:%s] hw state readout: %s\n",
connector->base.base.id, connector->base.name,