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msm: mdss: Disable idle pc during unblank

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Disable idle pc during unblank, because LPM could introduce
big delay from waiting for DSI DMA.

Change-Id: Id11bf3f3015fa1ea4b22d1e1c2abd380cd8b65a2
Signed-off-by: Ray Zhang <rayz@codeaurora.org>
This commit is contained in:
Ray Zhang 2014-12-10 15:30:48 +08:00 committed by feifanz
parent 4e1c6e6dd6
commit f84a20fe75
1 changed files with 34 additions and 0 deletions
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34
drivers/video/msm/mdss/mdss_dsi.c
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@ -24,6 +24,7 @@
#include <linux/leds-qpnp-wled.h>
#include <linux/clk.h>
#include <linux/uaccess.h>
#include <linux/pm_qos.h>
#include "mdss.h"
#include "mdss_panel.h"
@ -36,6 +37,30 @@
/* Master structure to hold all the information about the DSI/panel */
static struct mdss_dsi_data *mdss_dsi_res;
#define DSI_DISABLE_PC_LATENCY 100
#define DSI_ENABLE_PC_LATENCY PM_QOS_DEFAULT_VALUE
static struct pm_qos_request mdss_dsi_pm_qos_request;
static void mdss_dsi_pm_qos_add_request(void)
{
pr_debug("%s: add request", __func__);
pm_qos_add_request(&mdss_dsi_pm_qos_request, PM_QOS_CPU_DMA_LATENCY,
PM_QOS_DEFAULT_VALUE);
}
static void mdss_dsi_pm_qos_remove_request(void)
{
pr_debug("%s: remove request", __func__);
pm_qos_remove_request(&mdss_dsi_pm_qos_request);
}
static void mdss_dsi_pm_qos_update_request(int val)
{
pr_debug("%s: update request %d", __func__, val);
pm_qos_update_request(&mdss_dsi_pm_qos_request, val);
}
static int mdss_dsi_pinctrl_set_state(struct mdss_dsi_ctrl_pdata *ctrl_pdata,
bool active);
@ -1342,6 +1367,8 @@ static int mdss_dsi_unblank(struct mdss_panel_data *pdata)
pr_debug("%s+: ctrl=%p ndx=%d cur_blank_state=%d\n", __func__,
ctrl_pdata, ctrl_pdata->ndx, pdata->panel_info.blank_state);
mdss_dsi_pm_qos_update_request(DSI_DISABLE_PC_LATENCY);
mdss_dsi_clk_ctrl(ctrl_pdata, DSI_ALL_CLKS, 1);
if (pdata->panel_info.blank_state == MDSS_PANEL_BLANK_LOW_POWER) {
@ -1372,6 +1399,9 @@ static int mdss_dsi_unblank(struct mdss_panel_data *pdata)
error:
mdss_dsi_clk_ctrl(ctrl_pdata, DSI_ALL_CLKS, 0);
mdss_dsi_pm_qos_update_request(DSI_ENABLE_PC_LATENCY);
pr_debug("%s-:\n", __func__);
return ret;
@ -2329,6 +2359,8 @@ static int mdss_dsi_ctrl_probe(struct platform_device *pdev)
INIT_DELAYED_WORK(&ctrl_pdata->dba_work, mdss_dsi_dba_work);
mdss_dsi_pm_qos_add_request();
pr_debug("%s: Dsi Ctrl->%d initialized\n", __func__, index);
return 0;
@ -2695,6 +2727,8 @@ static int mdss_dsi_ctrl_remove(struct platform_device *pdev)
return -ENODEV;
}
mdss_dsi_pm_qos_remove_request();
if (msm_dss_config_vreg(&pdev->dev,
ctrl_pdata->panel_power_data.vreg_config,
ctrl_pdata->panel_power_data.num_vreg, 1) < 0)