samsung-sm8650/android_kernel_samsung_sm8650-modules
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disp: msm: dp: add support for voltage swing level 3

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Currently, the max voltage swing supported is level 2. This change
adds support for voltage swing level 3 in the dp driver.

Change-Id: Idf1dbb4e74edff924067130a5edea869f392bf38
Signed-off-by: Sudarsan Ramesh <sudarame@codeaurora.org>
这个提交包含在：
Sudarsan Ramesh
2021-05-12 16:03:52 -04:00
父节点 72f7dfe428
当前提交 71a264056d
共修改 4 个文件，包含 30 行新增和 16 行删除
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24
msm/dp/dp_link.c
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@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
* Copyright (c) 2012-2021, The Linux Foundation. All rights reserved.
*
* Copyright (c) 2009 Keith Packard
*
@@ -1427,15 +1427,18 @@ static int dp_link_adjust_levels(struct dp_link *dp_link, u8 *link_status)
print_hex_dump_debug("[drm-dp] Req (VxPx): ",
DUMP_PREFIX_NONE, 8, 2, buf, sizeof(buf), false);
DP_DEBUG("Current (VxPx): 0x%x, 0x%x\n",
dp_link->phy_params.v_level, dp_link->phy_params.p_level);
/**
* Adjust the voltage swing and pre-emphasis level combination to within
* the allowable range.
*/
if (dp_link->phy_params.v_level > DP_LINK_VOLTAGE_MAX)
dp_link->phy_params.v_level = DP_LINK_VOLTAGE_MAX;
if (dp_link->phy_params.v_level > dp_link->phy_params.max_v_level)
dp_link->phy_params.v_level = dp_link->phy_params.max_v_level;
if (dp_link->phy_params.p_level > DP_LINK_PRE_EMPHASIS_MAX)
dp_link->phy_params.p_level = DP_LINK_PRE_EMPHASIS_MAX;
if (dp_link->phy_params.p_level > dp_link->phy_params.max_p_level)
dp_link->phy_params.p_level = dp_link->phy_params.max_p_level;
if ((dp_link->phy_params.p_level > DP_LINK_PRE_EMPHASIS_LEVEL_1)
&& (dp_link->phy_params.v_level == DP_LINK_VOLTAGE_LEVEL_2))
@@ -1445,7 +1448,7 @@ static int dp_link_adjust_levels(struct dp_link *dp_link, u8 *link_status)
&& (dp_link->phy_params.v_level == DP_LINK_VOLTAGE_LEVEL_1))
dp_link->phy_params.p_level = DP_LINK_PRE_EMPHASIS_LEVEL_2;
DP_DEBUG("Set (VxPx): %x%x\n",
DP_DEBUG("Set (VxPx): 0x%x, 0x%x\n",
dp_link->phy_params.v_level, dp_link->phy_params.p_level);
return 0;
@@ -1619,7 +1622,7 @@ int dp_link_configure(struct drm_dp_aux *aux, struct drm_dp_link *link)
return 0;
}
struct dp_link *dp_link_get(struct device *dev, struct dp_aux *aux)
struct dp_link *dp_link_get(struct device *dev, struct dp_aux *aux, u32 dp_core_revision)
{
int rc = 0;
struct dp_link_private *link;
@@ -1642,6 +1645,13 @@ struct dp_link *dp_link_get(struct device *dev, struct dp_aux *aux)
dp_link = &link->dp_link;
if (dp_core_revision >= 0x10020003)
dp_link->phy_params.max_v_level = DP_LINK_VOLTAGE_LEVEL_3;
else
dp_link->phy_params.max_v_level = DP_LINK_VOLTAGE_LEVEL_2;
dp_link->phy_params.max_p_level = DP_LINK_PRE_EMPHASIS_LEVEL_3;
dp_link->process_request = dp_link_process_request;
dp_link->get_test_bits_depth = dp_link_get_test_bits_depth;
dp_link->get_colorimetry_config = dp_link_get_colorimetry_config;