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| author | Imre Deak <imre.deak@intel.com> | 2026-06-16 23:08:43 +0300 |
|---|---|---|
| committer | Imre Deak <imre.deak@intel.com> | 2026-06-24 19:44:03 +0300 |
| commit | 13b1b0b98b82ddaefd899a29318bc745acaf433c (patch) | |
| tree | 23100f0cfb14184de86a78403ef17cdeb7ac541f | |
| parent | 17659f83926c0bd8938df72392ff45a568a38b47 (diff) | |
| download | linux-13b1b0b98b82ddaefd899a29318bc745acaf433c.tar.gz linux-13b1b0b98b82ddaefd899a29318bc745acaf433c.zip | |
drm/i915/dp_link_caps: Add helper to reset max link limits
Add a helper to reset the link_caps::max_limits max link limits to the
maximum common supported rate and lane count.
This is needed by a follow-up change in the link training fallback code,
which temporarily resets max_limits before searching for a fallback
configuration.
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patch.msgid.link/20260616200849.3534628-24-imre.deak@intel.com
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_link_caps.c | 22 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_link_caps.h | 1 |
2 files changed, 23 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_caps.c b/drivers/gpu/drm/i915/display/intel_dp_link_caps.c index e568f00720d3..ae10200bdd93 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_link_caps.c +++ b/drivers/gpu/drm/i915/display/intel_dp_link_caps.c @@ -160,6 +160,16 @@ static void set_max_link_limits_no_update(struct intel_dp_link_caps *link_caps, intel_dp->link.max_lane_count = max_link_limits->lane_count; } +static void reset_max_link_limits_no_update(struct intel_dp_link_caps *link_caps) +{ + struct intel_dp_link_config max_link_limits = { + .rate = intel_dp_max_common_rate(link_caps->dp), + .lane_count = intel_dp_link_caps_max_common_lane_count(link_caps), + }; + + set_max_link_limits_no_update(link_caps, &max_link_limits); +} + /** * intel_dp_link_caps_get_max_limits - get the current maximum link limits * @link_caps: link capabilities state @@ -216,6 +226,18 @@ bool intel_dp_link_caps_set_max_limits(struct intel_dp_link_caps *link_caps, return true; } +/** + * intel_dp_link_caps_reset_max_limits - reset the current maximum link limits + * @link_caps: link capabilities state + * + * Reset the current maximum link limits to the maximum supported common link + * rate and lane count. + */ +void intel_dp_link_caps_reset_max_limits(struct intel_dp_link_caps *link_caps) +{ + reset_max_link_limits_no_update(link_caps); +} + static int intel_dp_link_config_bw(struct intel_dp *intel_dp, const struct intel_dp_link_config_entry *lc) { diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_caps.h b/drivers/gpu/drm/i915/display/intel_dp_link_caps.h index c6c60b788887..7baeb4359d2d 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_link_caps.h +++ b/drivers/gpu/drm/i915/display/intel_dp_link_caps.h @@ -31,6 +31,7 @@ void intel_dp_link_caps_get_max_limits(struct intel_dp_link_caps *link_caps, struct intel_dp_link_config *max_link_limits); bool intel_dp_link_caps_set_max_limits(struct intel_dp_link_caps *link_caps, const struct intel_dp_link_config *max_link_limits); +void intel_dp_link_caps_reset_max_limits(struct intel_dp_link_caps *link_caps); bool intel_dp_link_caps_update(struct intel_dp *intel_dp, const int *rates, int num_rates, int max_lane_count); |