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disp: msm: sde: Add support to limit DSC size to 10k

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With full DSC size of 20k, RT performance issues are seen due to the
stress created during larger prefill needed to fill up the 20k DSC buffer.

Limiting DSC size to 10k helps to mitigate these RT performace issues.

This change adds support for this based on new flag has_reduced_ob_max
in sde_mdss_cfg data structure. Flag has_reduced_ob_max has be set
true only on targets where its recommended.

Change-Id: I649d213bcd378025bd0548fb982b55c98c99224f
Signed-off-by: Ritesh Kumar <quic_riteshk@quicinc.com>
This commit is contained in:
Ritesh Kumar
2021-12-27 17:27:36 +05:30
parent 9b27e02a2a
commit e230290310
3 changed files with 19 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
msm/sde/sde_hw_catalog.c
View File

@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2015-2021, The Linux Foundation. All rights reserved.
* Copyright (c) 2022, Qualcomm Innovation Center, Inc. All rights reserved.
* Copyright (c) 2015-2022, The Linux Foundation. All rights reserved.
*/
#define pr_fmt(fmt) "[drm:%s:%d] " fmt, __func__, __LINE__
@@ -3271,7 +3272,8 @@ static int sde_dsc_parse_dt(struct device_node *np,
if (PROP_VALUE_ACCESS(prop_value, DSC_422, i))
set_bit(SDE_DSC_NATIVE_422_EN,
&dsc->features);
if (sde_cfg->has_reduced_ob_max)
set_bit(SDE_DSC_REDUCED_OB_MAX, &dsc->features);
} else {
set_bit(SDE_DSC_HW_REV_1_1, &dsc->features);
}
@@ -5148,6 +5150,7 @@ static int _sde_hardware_pre_caps(struct sde_mdss_cfg *sde_cfg, uint32_t hw_rev)
sde_cfg->has_cwb_crop = true;
sde_cfg->has_qsync = true;
sde_cfg->perf.min_prefill_lines = 40;
sde_cfg->has_reduced_ob_max = true;
sde_cfg->vbif_qos_nlvl = 8;
sde_cfg->ts_prefill_rev = 2;
sde_cfg->ctl_rev = SDE_CTL_CFG_VERSION_1_0_0;

7
msm/sde/sde_hw_catalog.h
View File

@@ -1,6 +1,7 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2015-2021, The Linux Foundation. All rights reserved.
* Copyright (c) 2022, Qualcomm Innovation Center, Inc. All rights reserved.
* Copyright (c) 2015-2022, The Linux Foundation. All rights reserved.
*/
#ifndef _SDE_HW_CATALOG_H
@@ -459,6 +460,7 @@ enum {
* @SDE_DSC_HW_REV_1_1 dsc block supports dsc 1.1 only
* @SDE_DSC_HW_REV_1_2 dsc block supports dsc 1.1 and 1.2
* @SDE_DSC_NATIVE_422_EN, Supports native422 and native420 encoding
* @SDE_DSC_REDUCED_OB_MAX, DSC size is limited to 10k
* @SDE_DSC_ENC, DSC encoder sub block
* @SDE_DSC_CTL, DSC ctl sub block
* @SDE_DSC_MAX
@@ -468,6 +470,7 @@ enum {
SDE_DSC_HW_REV_1_1,
SDE_DSC_HW_REV_1_2,
SDE_DSC_NATIVE_422_EN,
SDE_DSC_REDUCED_OB_MAX,
SDE_DSC_ENC,
SDE_DSC_CTL,
SDE_DSC_MAX
@@ -1522,6 +1525,7 @@ struct sde_perf_cfg {
* @skip_inline_rot_thresh Skip inline rotation threshold
* @has_idle_pc indicate if idle power collapse feature is supported
* @allowed_dsc_reservation_switch intf to which dsc reservation switch is supported
* @has_reduced_ob_max indicate if DSC size is limited to 10k
* @wakeup_with_touch indicate early wake up display with input touch event
* @has_hdr HDR feature support
* @has_hdr_plus HDR10+ feature support
@@ -1615,6 +1619,7 @@ struct sde_mdss_cfg {
bool skip_inline_rot_threshold;
bool has_idle_pc;
u32 allowed_dsc_reservation_switch;
bool has_reduced_ob_max;
bool wakeup_with_touch;
u32 vbif_qos_nlvl;
u32 ts_prefill_rev;

13
msm/sde/sde_hw_dsc_1_2.c
View File

@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2020-2021, The Linux Foundation. All rights reserved.
* Copyright (c) 2022, Qualcomm Innovation Center, Inc. All rights reserved.
* Copyright (c) 2020-2022, The Linux Foundation. All rights reserved.
*/
#include "sde_hw_mdss.h"
@@ -60,19 +61,21 @@
static int _dsc_calc_ob_max_addr(struct sde_hw_dsc *hw_dsc, int num_ss)
{
enum sde_dsc idx;
bool reduced_ob_max;
idx = hw_dsc->idx;
reduced_ob_max = hw_dsc->caps->features & BIT(SDE_DSC_REDUCED_OB_MAX);
if (!(hw_dsc->caps->features & BIT(SDE_DSC_NATIVE_422_EN))) {
if (num_ss == 1)
return 2399;
return reduced_ob_max ? 1199 : 2399;
else if (num_ss == 2)
return 1199;
return reduced_ob_max ? 599 : 1199;
} else {
if (num_ss == 1)
return 1199;
return reduced_ob_max ? 599 : 1199;
else if (num_ss == 2)
return 599;
return reduced_ob_max ? 299 : 599;
}
return 0;
}