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disp: msm: dp: replace dp clock trees with single nodes

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The current pll driver models the entire DP clock
hierarchy using the clock framework. This creates
unnecessary dependency between the dp driver and
the clock driver and also limits the flexibility
to dp driver when configuring the DP clocks.

This change models these clocks as single nodes
and provide full control to the dp driver and
also minimizes the dependency on the clock driver.

Change-Id: Id5221441ea33b576e7c543396a12cbeb7b44d319
Signed-off-by: Yuan Zhao <yzhao@codeaurora.org>
This commit is contained in:
Yuan Zhao
2021-01-13 12:22:28 +08:00
committed by Gerrit - the friendly Code Review server
parent 819630e6b0
commit 600416fa77
5 changed files with 302 additions and 404 deletions
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27
msm/dp/dp_ctrl.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.
*/
#include <linux/types.h>
@@ -62,6 +62,7 @@ struct dp_ctrl_private {
struct dp_power *power;
struct dp_parser *parser;
struct dp_catalog_ctrl *catalog;
struct dp_pll *pll;
struct completion idle_comp;
struct completion video_comp;
@@ -642,6 +643,22 @@ static int dp_ctrl_enable_link_clock(struct dp_ctrl_private *ctrl)
dp_ctrl_set_clock_rate(ctrl, "link_clk", type, rate);
if (ctrl->pll->pll_cfg) {
ret = ctrl->pll->pll_cfg(ctrl->pll, rate);
if (ret < 0) {
DP_ERR("DP pll cfg failed\n");
return ret;
}
}
if (ctrl->pll->pll_prepare) {
ret = ctrl->pll->pll_prepare(ctrl->pll);
if (ret < 0) {
DP_ERR("DP pll prepare failed\n");
return ret;
}
}
ret = ctrl->power->clk_enable(ctrl->power, type, true);
if (ret) {
DP_ERR("Unabled to start link clocks\n");
@@ -653,7 +670,14 @@ static int dp_ctrl_enable_link_clock(struct dp_ctrl_private *ctrl)
static void dp_ctrl_disable_link_clock(struct dp_ctrl_private *ctrl)
{
int rc = 0;
ctrl->power->clk_enable(ctrl->power, DP_LINK_PM, false);
if (ctrl->pll->pll_unprepare) {
rc = ctrl->pll->pll_unprepare(ctrl->pll);
if (rc < 0)
DP_ERR("pll unprepare failed\n");
}
}
static void dp_ctrl_select_training_pattern(struct dp_ctrl_private *ctrl,
@@ -1470,6 +1494,7 @@ struct dp_ctrl *dp_ctrl_get(struct dp_ctrl_in *in)
ctrl->aux = in->aux;
ctrl->link = in->link;
ctrl->catalog = in->catalog;
ctrl->pll = in->pll;
ctrl->dev = in->dev;
ctrl->mst_mode = false;
ctrl->fec_mode = false;