From: Roman Li <Roman.Li@amd.com>
Date: Sat, 14 Mar 2026 00:27:54 +0000 (-0400)
Subject: drm/amd/display: Add missing dcn42 hubbub function pointers
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=c446748aa3f233451955bf63ac9887047fe13e73;p=thirdparty%2Flinux.git

drm/amd/display: Add missing dcn42 hubbub function pointers

This aligning commit combines:
- fix dcn42 det programming)
- fix missing dcn42 pointers
- fix SDPIF_Request_Rate_Limit programming value

V2: Add back dchvm_init for DCN42

Reviewed-by: Alex Hung <alex.hung@amd.com>
Reviewed-by: Leo Chen <leo.chen@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Signed-off-by: Chuanyu Tseng <Chuanyu.Tseng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/dc/hubbub/dcn42/dcn42_hubbub.c b/drivers/gpu/drm/amd/display/dc/hubbub/dcn42/dcn42_hubbub.c
index d6e6fbaa041b3..9e4d526b6d523 100644
--- a/drivers/gpu/drm/amd/display/dc/hubbub/dcn42/dcn42_hubbub.c
+++ b/drivers/gpu/drm/amd/display/dc/hubbub/dcn42/dcn42_hubbub.c
@@ -6,6 +6,7 @@
 #include "dcn31/dcn31_hubbub.h"
 #include "dcn32/dcn32_hubbub.h"
 #include "dcn35/dcn35_hubbub.h"
+#include "dcn401/dcn401_hubbub.h"
 #include "dcn42/dcn42_hubbub.h"
 #include "dm_services.h"
 #include "reg_helper.h"
@@ -494,6 +495,14 @@ static bool hubbub42_program_watermarks(
 	return wm_pending;
 }
 
+static void hubbub42_set_request_limit(struct hubbub *hubbub, int memory_channel_count, int words_per_channel)
+{
+	struct dcn20_hubbub *hubbub2 = TO_DCN20_HUBBUB(hubbub);
+	uint32_t request_limit = 96; //MAX(12 * memory_channel_count, 96);
+
+	REG_UPDATE(SDPIF_REQUEST_RATE_LIMIT, SDPIF_REQUEST_RATE_LIMIT, request_limit);
+}
+
 static const struct hubbub_funcs hubbub42_funcs = {
 	.update_dchub = hubbub2_update_dchub,
 	.init_dchub_sys_ctx = hubbub31_init_dchub_sys_ctx,
@@ -509,13 +518,16 @@ static const struct hubbub_funcs hubbub42_funcs = {
 	.force_wm_propagate_to_pipes = hubbub32_force_wm_propagate_to_pipes,
 	.force_pstate_change_control = hubbub3_force_pstate_change_control,
 	.init_watermarks = hubbub35_init_watermarks,
-	.program_det_size = dcn32_program_det_size,
-	.program_compbuf_size = dcn35_program_compbuf_size,
-	.init_crb = dcn35_init_crb,
+	.init_crb = dcn401_init_crb,
+	.dchvm_init = dcn35_dchvm_init,
 	.hubbub_read_state = hubbub2_read_state,
 	.force_usr_retraining_allow = hubbub32_force_usr_retraining_allow,
-	.dchubbub_init = hubbub35_init,
-	.dchvm_init = dcn35_dchvm_init,
+	.set_request_limit = hubbub42_set_request_limit,
+	.program_det_segments = dcn401_program_det_segments,
+	.program_compbuf_segments = dcn401_program_compbuf_segments,
+	.wait_for_det_update = dcn401_wait_for_det_update,
+	.program_arbiter = dcn401_program_arbiter,
+	.hubbub_read_reg_state = hubbub3_read_reg_state
 };
 
 void hubbub42_construct(struct dcn20_hubbub *hubbub2,