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drm/i915/dp_link_caps: Introduce DP link capability module

Browse Source 
Start isolating the DP link capability logic from the generic DP code by
adding a separate intel_dp_link_caps module and a corresponding state
object.

Allocate the state so it can remain opaque within its module.

Follow-up changes will move link capability helpers and state from
intel_dp.c and intel_dp_link_training.c to the new module and state.

v2: Remove unnecessary function documentation. (Jani)

Cc: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patch.msgid.link/20260616200849.3534628-4-imre.deak@intel.com
This commit is contained in:
Imre Deak 2026-06-16 23:08:23 +03:00
parent f5fed6af1c
commit ebf5ad5cbc
6 changed files with 55 additions and 0 deletions
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1
drivers/gpu/drm/i915/Makefile
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@ -356,6 +356,7 @@ i915-y += \
display/intel_dp_aux.o \
display/intel_dp_aux_backlight.o \
display/intel_dp_hdcp.o \
display/intel_dp_link_caps.o \
display/intel_dp_link_training.o \
display/intel_dp_mst.o \
display/intel_dp_test.o \

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

@ -58,6 +58,7 @@ struct cec_notifier;
struct drm_printer;
struct intel_connector;
struct intel_ddi_buf_trans;
struct intel_dp_link_caps;
struct intel_dp_link_training;
struct intel_fbc;
struct intel_global_objs_state;
@ -1869,6 +1870,7 @@ struct intel_dp {
int force_lane_count;
int force_rate;
struct intel_dp_link_training *training;
struct intel_dp_link_caps *caps;
} link;
bool reset_link_params;
int mso_link_count;

9
drivers/gpu/drm/i915/display/intel_dp.c
View File

@ -71,6 +71,7 @@
#include "intel_dp.h"
#include "intel_dp_aux.h"
#include "intel_dp_hdcp.h"
#include "intel_dp_link_caps.h"
#include "intel_dp_link_training.h"
#include "intel_dp_mst.h"
#include "intel_dp_test.h"
@ -7458,10 +7459,18 @@ int intel_dp_link_init(struct intel_dp *intel_dp)
if (!intel_dp->link.training)
return -ENOMEM;
intel_dp->link.caps = intel_dp_link_caps_init(intel_dp);
if (!intel_dp->link.caps) {
intel_dp_link_training_cleanup(intel_dp->link.training);
return -ENOMEM;
}
return 0;
}
void intel_dp_link_cleanup(struct intel_dp *intel_dp)
{
intel_dp_link_caps_cleanup(intel_dp->link.caps);
intel_dp_link_training_cleanup(intel_dp->link.training);
}

30
drivers/gpu/drm/i915/display/intel_dp_link_caps.c Normal file
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@ -0,0 +1,30 @@
// SPDX-License-Identifier: MIT
/*
* Copyright © 2026 Intel Corporation
*/
#include <linux/slab.h>
#include "intel_dp_link_caps.h"
struct intel_dp_link_caps {
struct intel_dp *dp;
};
struct intel_dp_link_caps *intel_dp_link_caps_init(struct intel_dp *intel_dp)
{
struct intel_dp_link_caps *link_caps;
link_caps = kzalloc_obj(*link_caps);
if (!link_caps)
return NULL;
link_caps->dp = intel_dp;
return link_caps;
}
void intel_dp_link_caps_cleanup(struct intel_dp_link_caps *link_caps)
{
kfree(link_caps);
}

12
drivers/gpu/drm/i915/display/intel_dp_link_caps.h Normal file
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@ -0,0 +1,12 @@
/* SPDX-License-Identifier: MIT */
/* Copyright © 2026 Intel Corporation */
#ifndef __INTEL_DP_LINK_CAPS_H__
#define __INTEL_DP_LINK_CAPS_H__
struct intel_dp;
struct intel_dp_link_caps *intel_dp_link_caps_init(struct intel_dp *intel_dp);
void intel_dp_link_caps_cleanup(struct intel_dp_link_caps *link_caps);
#endif /* __INTEL_DP_LINK_CAPS_H__ */

1
drivers/gpu/drm/xe/Makefile
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@ -278,6 +278,7 @@ xe-$(CONFIG_DRM_XE_DISPLAY) += \
i915-display/intel_dp_aux.o \
i915-display/intel_dp_aux_backlight.o \
i915-display/intel_dp_hdcp.o \
i915-display/intel_dp_link_caps.o \
i915-display/intel_dp_link_training.o \
i915-display/intel_dp_mst.o \
i915-display/intel_dp_test.o \