From e084812de907c63b0b943b3955bf629df62f6745 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Micha=C5=82=20Grzelak?= Date: Fri, 4 Sep 2026 14:31:45 +0200 Subject: [PATCH] drm/i915/buf_trans: add vfunc for VS/PE-O MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Choosing correct table for Vswing / Pre-emphasis Override is platform specific. It also requires different checks that are already used for choosing predefined tables. Add new get_buf_trans_override() vfunc into intel_encoder returning deparsed table from VBT#57. In next patches, set it inside already present if-ladder from intel_ddi_buf_trans_init() instead of duplicating it. Note that get_buf_trans() cannot be overwritten since there are cases when we need to rollback although VS/PE-O was requested, eg. DP is not connected or feature is not yet implemented for the platform. Assume that vfunc returns NULL on rollback and return predefined tables. Suggested-by: Jani Nikula Signed-off-by: Michał Grzelak Reviewed-by: Suraj Kandpal Acked-by: Jani Nikula Signed-off-by: Suraj Kandpal Link: https://patch.msgid.link/20260904123148.2165596-6-michal.grzelak@intel.com --- drivers/gpu/drm/i915/display/intel_ddi_buf_trans.c | 8 ++++++++ drivers/gpu/drm/i915/display/intel_display_types.h | 3 +++ 2 files changed, 11 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.c b/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.c index 4cd1e4d76c7a..f31283a0331b 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.c +++ b/drivers/gpu/drm/i915/display/intel_ddi_buf_trans.c @@ -1857,5 +1857,13 @@ const struct intel_ddi_buf_trans *intel_ddi_buf_trans_get(struct intel_encoder * const struct intel_crtc_state *crtc_state, int *n_entries) { + if (encoder->get_buf_trans_override) { + const struct intel_ddi_buf_trans *override; + + override = encoder->get_buf_trans_override(encoder, crtc_state, n_entries); + if (override) + return intel_get_buf_trans(override, n_entries); + } + return encoder->get_buf_trans(encoder, crtc_state, n_entries); } diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index 5f0fe18c0614..9016be52c7ea 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -289,6 +289,9 @@ struct intel_encoder { */ enum icl_port_dpll_id (*port_pll_type)(struct intel_encoder *encoder, const struct intel_crtc_state *crtc_state); + const struct intel_ddi_buf_trans *(*get_buf_trans_override)(struct intel_encoder *encoder, + const struct intel_crtc_state *crtc_state, + int *n_entries); const struct intel_ddi_buf_trans *(*get_buf_trans)(struct intel_encoder *encoder, const struct intel_crtc_state *crtc_state, int *n_entries);