evie/android_kernel_oneplus_msm8998
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msm: mdss: dsi: reset phy during idle screen

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Add reset of the phy pll when driver
exits idle screen. This fixes random
failures that were causing dsi commands
to fail after exit idle power collapse.

Change-Id: I0f6a53aef31c1c00f6d3cf1efceaa8211684412c
Signed-off-by: Ingrid Gallardo <ingridg@codeaurora.org>
This commit is contained in:
Ingrid Gallardo 2017-03-22 15:18:44 -07:00
parent 15a311d026
commit 1a582ab50b
3 changed files with 45 additions and 2 deletions
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11
drivers/video/fbdev/msm/mdss_dsi_phy.h
View file

@ -1,4 +1,4 @@
/* Copyright (c) 2015-2016, The Linux Foundation. All rights reserved.
/* Copyright (c) 2015-2017, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@ -115,4 +115,13 @@ int mdss_dsi_phy_v3_wait_for_lanes_stop_state(struct mdss_dsi_ctrl_pdata *ctrl,
* assumes that the link and core clocks are already on.
*/
int mdss_dsi_phy_v3_ulps_config(struct mdss_dsi_ctrl_pdata *ctrl, bool enable);
/**
* mdss_dsi_phy_v3_idle_pc_exit() - Called after Idle Power Collapse exit
* @ctrl: pointer to DSI controller structure
*
* This function is called after Idle Power Collapse, so driver
* can perform any sequence required after the Idle PC exit.
*/
void mdss_dsi_phy_v3_idle_pc_exit(struct mdss_dsi_ctrl_pdata *ctrl);
#endif /* MDSS_DSI_PHY_H */

17
drivers/video/fbdev/msm/mdss_dsi_phy_v3.c
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2016, The Linux Foundation. All rights reserved.
* Copyright (c) 2016-2017, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@ -327,6 +327,7 @@ int mdss_dsi_phy_v3_ulps_config(struct mdss_dsi_ctrl_pdata *ctrl, bool enable)
*/
DSI_PHY_W32(ctrl->phy_io.base, CMN_DSI_LANE_CTRL3,
active_lanes);
usleep_range(5, 15);
DSI_PHY_W32(ctrl->phy_io.base, CMN_DSI_LANE_CTRL3, 0);
@ -340,6 +341,20 @@ error:
return rc;
}
void mdss_dsi_phy_v3_idle_pc_exit(struct mdss_dsi_ctrl_pdata *ctrl)
{
u32 val = BIT(5);
u32 data;
/* Reset phy pll after idle pc exit */
data = DSI_PHY_R32(ctrl->phy_io.base, CMN_CTRL_1);
DSI_PHY_W32(ctrl->phy_io.base, CMN_CTRL_1, data | val);
usleep_range(10, 15);
data = DSI_PHY_R32(ctrl->phy_io.base, CMN_CTRL_1);
data &= ~(BIT(5));
DSI_PHY_W32(ctrl->phy_io.base, CMN_CTRL_1, data);
}
int mdss_dsi_phy_v3_shutdown(struct mdss_dsi_ctrl_pdata *ctrl)
{

19
drivers/video/fbdev/msm/msm_mdss_io_8974.c
View file

@ -1969,6 +1969,20 @@ error:
return ret;
}
/**
* mdss_dsi_phy_idle_pc_exit() - Called after exit Idle PC
* @ctrl: pointer to DSI controller structure
*
* Perform any programming needed after Idle PC exit.
*/
static int mdss_dsi_phy_idle_pc_exit(struct mdss_dsi_ctrl_pdata *ctrl)
{
if (ctrl->shared_data->phy_rev == DSI_PHY_REV_30)
mdss_dsi_phy_v3_idle_pc_exit(ctrl);
return 0;
}
/**
* mdss_dsi_clamp_ctrl_default() - Program DSI clamps
* @ctrl: pointer to DSI controller structure
@ -2486,5 +2500,10 @@ int mdss_dsi_pre_clkon_cb(void *priv,
}
}
if ((clk_type & MDSS_DSI_LINK_CLK) &&
(new_state == MDSS_DSI_CLK_ON) &&
!ctrl->panel_data.panel_info.cont_splash_enabled)
mdss_dsi_phy_idle_pc_exit(ctrl);
return rc;
}