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