359 lines
8.9 KiB
C
359 lines
8.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.
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*/
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#define pr_fmt(fmt) "[drm:%s:%d] " fmt, __func__, __LINE__
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#include <linux/debugfs.h>
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#include <linux/delay.h>
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#include "dpu_vbif.h"
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#include "dpu_hw_vbif.h"
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#include "dpu_trace.h"
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static struct dpu_hw_vbif *dpu_get_vbif(struct dpu_kms *dpu_kms, enum dpu_vbif vbif_idx)
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{
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if (vbif_idx < ARRAY_SIZE(dpu_kms->hw_vbif))
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return dpu_kms->hw_vbif[vbif_idx];
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return NULL;
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}
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static const char *dpu_vbif_name(enum dpu_vbif idx)
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{
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switch (idx) {
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case VBIF_RT:
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return "VBIF_RT";
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case VBIF_NRT:
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return "VBIF_NRT";
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default:
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return "??";
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}
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}
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/**
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* _dpu_vbif_wait_for_xin_halt - wait for the xin to halt
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* @vbif: Pointer to hardware vbif driver
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* @xin_id: Client interface identifier
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* @return: 0 if success; error code otherwise
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*/
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static int _dpu_vbif_wait_for_xin_halt(struct dpu_hw_vbif *vbif, u32 xin_id)
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{
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ktime_t timeout;
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bool status;
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int rc;
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if (!vbif || !vbif->cap || !vbif->ops.get_halt_ctrl) {
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DPU_ERROR("invalid arguments vbif %d\n", vbif != NULL);
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return -EINVAL;
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}
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timeout = ktime_add_us(ktime_get(), vbif->cap->xin_halt_timeout);
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for (;;) {
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status = vbif->ops.get_halt_ctrl(vbif, xin_id);
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if (status)
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break;
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if (ktime_compare_safe(ktime_get(), timeout) > 0) {
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status = vbif->ops.get_halt_ctrl(vbif, xin_id);
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break;
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}
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usleep_range(501, 1000);
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}
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if (!status) {
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rc = -ETIMEDOUT;
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DPU_ERROR("%s client %d not halting. TIMEDOUT.\n",
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dpu_vbif_name(vbif->idx), xin_id);
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} else {
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rc = 0;
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DRM_DEBUG_ATOMIC("%s client %d is halted\n",
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dpu_vbif_name(vbif->idx), xin_id);
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}
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return rc;
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}
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/**
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* _dpu_vbif_apply_dynamic_ot_limit - determine OT based on usecase parameters
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* @vbif: Pointer to hardware vbif driver
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* @ot_lim: Pointer to OT limit to be modified
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* @params: Pointer to usecase parameters
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*/
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static void _dpu_vbif_apply_dynamic_ot_limit(struct dpu_hw_vbif *vbif,
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u32 *ot_lim, struct dpu_vbif_set_ot_params *params)
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{
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u64 pps;
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const struct dpu_vbif_dynamic_ot_tbl *tbl;
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u32 i;
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if (!vbif || !(vbif->cap->features & BIT(DPU_VBIF_QOS_OTLIM)))
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return;
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/* Dynamic OT setting done only for WFD */
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if (!params->is_wfd)
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return;
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pps = params->frame_rate;
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pps *= params->width;
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pps *= params->height;
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tbl = params->rd ? &vbif->cap->dynamic_ot_rd_tbl :
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&vbif->cap->dynamic_ot_wr_tbl;
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for (i = 0; i < tbl->count; i++) {
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if (pps <= tbl->cfg[i].pps) {
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*ot_lim = tbl->cfg[i].ot_limit;
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break;
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}
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}
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DRM_DEBUG_ATOMIC("%s xin:%d w:%d h:%d fps:%d pps:%llu ot:%u\n",
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dpu_vbif_name(vbif->idx), params->xin_id,
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params->width, params->height, params->frame_rate,
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pps, *ot_lim);
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}
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/**
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* _dpu_vbif_get_ot_limit - get OT based on usecase & configuration parameters
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* @vbif: Pointer to hardware vbif driver
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* @params: Pointer to usecase parameters
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* @return: OT limit
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*/
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static u32 _dpu_vbif_get_ot_limit(struct dpu_hw_vbif *vbif,
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struct dpu_vbif_set_ot_params *params)
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{
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u32 ot_lim = 0;
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u32 val;
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if (!vbif || !vbif->cap) {
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DPU_ERROR("invalid arguments vbif %d\n", vbif != NULL);
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return -EINVAL;
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}
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if (vbif->cap->default_ot_wr_limit && !params->rd)
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ot_lim = vbif->cap->default_ot_wr_limit;
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else if (vbif->cap->default_ot_rd_limit && params->rd)
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ot_lim = vbif->cap->default_ot_rd_limit;
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/*
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* If default ot is not set from dt/catalog,
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* then do not configure it.
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*/
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if (ot_lim == 0)
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goto exit;
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/* Modify the limits if the target and the use case requires it */
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_dpu_vbif_apply_dynamic_ot_limit(vbif, &ot_lim, params);
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if (vbif && vbif->ops.get_limit_conf) {
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val = vbif->ops.get_limit_conf(vbif,
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params->xin_id, params->rd);
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if (val == ot_lim)
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ot_lim = 0;
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}
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exit:
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DRM_DEBUG_ATOMIC("%s xin:%d ot_lim:%d\n",
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dpu_vbif_name(vbif->idx), params->xin_id, ot_lim);
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return ot_lim;
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}
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/**
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* dpu_vbif_set_ot_limit - set OT based on usecase & configuration parameters
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* @dpu_kms: DPU handler
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* @params: Pointer to usecase parameters
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*
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* Note this function would block waiting for bus halt.
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*/
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void dpu_vbif_set_ot_limit(struct dpu_kms *dpu_kms,
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struct dpu_vbif_set_ot_params *params)
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{
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struct dpu_hw_vbif *vbif;
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struct dpu_hw_mdp *mdp;
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bool forced_on = false;
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u32 ot_lim;
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int ret;
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mdp = dpu_kms->hw_mdp;
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vbif = dpu_get_vbif(dpu_kms, params->vbif_idx);
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if (!vbif || !mdp) {
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DRM_DEBUG_ATOMIC("invalid arguments vbif %d mdp %d\n",
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vbif != NULL, mdp != NULL);
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return;
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}
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if (!mdp->ops.setup_clk_force_ctrl ||
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!vbif->ops.set_limit_conf ||
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!vbif->ops.set_halt_ctrl)
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return;
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/* set write_gather_en for all write clients */
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if (vbif->ops.set_write_gather_en && !params->rd)
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vbif->ops.set_write_gather_en(vbif, params->xin_id);
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ot_lim = _dpu_vbif_get_ot_limit(vbif, params) & 0xFF;
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if (ot_lim == 0)
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return;
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trace_dpu_perf_set_ot(params->num, params->xin_id, ot_lim,
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params->vbif_idx);
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forced_on = mdp->ops.setup_clk_force_ctrl(mdp, params->clk_ctrl, true);
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vbif->ops.set_limit_conf(vbif, params->xin_id, params->rd, ot_lim);
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vbif->ops.set_halt_ctrl(vbif, params->xin_id, true);
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ret = _dpu_vbif_wait_for_xin_halt(vbif, params->xin_id);
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if (ret)
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trace_dpu_vbif_wait_xin_halt_fail(vbif->idx, params->xin_id);
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vbif->ops.set_halt_ctrl(vbif, params->xin_id, false);
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if (forced_on)
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mdp->ops.setup_clk_force_ctrl(mdp, params->clk_ctrl, false);
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}
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void dpu_vbif_set_qos_remap(struct dpu_kms *dpu_kms,
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struct dpu_vbif_set_qos_params *params)
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{
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struct dpu_hw_vbif *vbif;
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struct dpu_hw_mdp *mdp;
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bool forced_on = false;
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const struct dpu_vbif_qos_tbl *qos_tbl;
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int i;
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if (!params || !dpu_kms->hw_mdp) {
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DPU_ERROR("invalid arguments\n");
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return;
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}
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mdp = dpu_kms->hw_mdp;
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vbif = dpu_get_vbif(dpu_kms, params->vbif_idx);
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if (!vbif || !vbif->cap) {
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DPU_ERROR("invalid vbif %d\n", params->vbif_idx);
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return;
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}
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if (!vbif->ops.set_qos_remap || !mdp->ops.setup_clk_force_ctrl) {
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DRM_DEBUG_ATOMIC("qos remap not supported\n");
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return;
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}
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qos_tbl = params->is_rt ? &vbif->cap->qos_rt_tbl :
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&vbif->cap->qos_nrt_tbl;
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if (!qos_tbl->npriority_lvl || !qos_tbl->priority_lvl) {
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DRM_DEBUG_ATOMIC("qos tbl not defined\n");
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return;
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}
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forced_on = mdp->ops.setup_clk_force_ctrl(mdp, params->clk_ctrl, true);
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for (i = 0; i < qos_tbl->npriority_lvl; i++) {
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DRM_DEBUG_ATOMIC("%s xin:%d lvl:%d/%d\n",
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dpu_vbif_name(params->vbif_idx), params->xin_id, i,
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qos_tbl->priority_lvl[i]);
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vbif->ops.set_qos_remap(vbif, params->xin_id, i,
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qos_tbl->priority_lvl[i]);
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}
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if (forced_on)
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mdp->ops.setup_clk_force_ctrl(mdp, params->clk_ctrl, false);
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}
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void dpu_vbif_clear_errors(struct dpu_kms *dpu_kms)
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{
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struct dpu_hw_vbif *vbif;
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u32 i, pnd, src;
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for (i = 0; i < ARRAY_SIZE(dpu_kms->hw_vbif); i++) {
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vbif = dpu_kms->hw_vbif[i];
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if (vbif && vbif->ops.clear_errors) {
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vbif->ops.clear_errors(vbif, &pnd, &src);
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if (pnd || src) {
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DRM_DEBUG_KMS("%s: pnd 0x%X, src 0x%X\n",
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dpu_vbif_name(vbif->idx), pnd, src);
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}
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}
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}
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}
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void dpu_vbif_init_memtypes(struct dpu_kms *dpu_kms)
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{
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struct dpu_hw_vbif *vbif;
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int i, j;
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for (i = 0; i < ARRAY_SIZE(dpu_kms->hw_vbif); i++) {
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vbif = dpu_kms->hw_vbif[i];
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if (vbif && vbif->cap && vbif->ops.set_mem_type) {
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for (j = 0; j < vbif->cap->memtype_count; j++)
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vbif->ops.set_mem_type(
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vbif, j, vbif->cap->memtype[j]);
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}
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}
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}
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#ifdef CONFIG_DEBUG_FS
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void dpu_debugfs_vbif_init(struct dpu_kms *dpu_kms, struct dentry *debugfs_root)
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{
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char vbif_name[32];
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struct dentry *entry, *debugfs_vbif;
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int i, j;
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entry = debugfs_create_dir("vbif", debugfs_root);
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for (i = 0; i < dpu_kms->catalog->vbif_count; i++) {
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const struct dpu_vbif_cfg *vbif = &dpu_kms->catalog->vbif[i];
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snprintf(vbif_name, sizeof(vbif_name), "%d", vbif->id);
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debugfs_vbif = debugfs_create_dir(vbif_name, entry);
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debugfs_create_u32("features", 0600, debugfs_vbif,
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(u32 *)&vbif->features);
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debugfs_create_u32("xin_halt_timeout", 0400, debugfs_vbif,
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(u32 *)&vbif->xin_halt_timeout);
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debugfs_create_u32("default_rd_ot_limit", 0400, debugfs_vbif,
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(u32 *)&vbif->default_ot_rd_limit);
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debugfs_create_u32("default_wr_ot_limit", 0400, debugfs_vbif,
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(u32 *)&vbif->default_ot_wr_limit);
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for (j = 0; j < vbif->dynamic_ot_rd_tbl.count; j++) {
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const struct dpu_vbif_dynamic_ot_cfg *cfg =
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&vbif->dynamic_ot_rd_tbl.cfg[j];
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snprintf(vbif_name, sizeof(vbif_name),
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"dynamic_ot_rd_%d_pps", j);
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debugfs_create_u64(vbif_name, 0400, debugfs_vbif,
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(u64 *)&cfg->pps);
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snprintf(vbif_name, sizeof(vbif_name),
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"dynamic_ot_rd_%d_ot_limit", j);
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debugfs_create_u32(vbif_name, 0400, debugfs_vbif,
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(u32 *)&cfg->ot_limit);
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}
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for (j = 0; j < vbif->dynamic_ot_wr_tbl.count; j++) {
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const struct dpu_vbif_dynamic_ot_cfg *cfg =
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&vbif->dynamic_ot_wr_tbl.cfg[j];
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snprintf(vbif_name, sizeof(vbif_name),
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"dynamic_ot_wr_%d_pps", j);
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debugfs_create_u64(vbif_name, 0400, debugfs_vbif,
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(u64 *)&cfg->pps);
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snprintf(vbif_name, sizeof(vbif_name),
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"dynamic_ot_wr_%d_ot_limit", j);
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debugfs_create_u32(vbif_name, 0400, debugfs_vbif,
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(u32 *)&cfg->ot_limit);
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}
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}
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}
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#endif
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