evie/android_kernel_oneplus_msm8998
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msm: mdss: remove unnecessary lock in checking DSI status

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Since DSI status checking is purely DSI operation, it's not
necessary to acquire ov_lock in case of video mode, otherwise
this function could block other overlay functions, therefore
introducing extra delay.

CRs-fixed: 714531
Change-Id: I5051ff3495d516b405cd3bf5dc32ea712187975e
Signed-off-by: Ray Zhang <rayz@codeaurora.org>
This commit is contained in:
Ray Zhang 2014-09-01 15:52:51 +08:00 • committed by David Keitel
parent eca7092bac
commit e2e79b5fe8
1 changed files with 16 additions and 9 deletions
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19
drivers/video/fbdev/msm/dsi_status_6g.c
View file

@ -31,6 +31,7 @@ void mdss_check_dsi_ctrl_status(struct work_struct *work, uint32_t interval)
{
struct dsi_status_data *pstatus_data = NULL;
struct mdss_panel_data *pdata = NULL;
struct mipi_panel_info *mipi = NULL;
struct mdss_dsi_ctrl_pdata *ctrl_pdata = NULL;
struct mdss_overlay_private *mdp5_data = NULL;
struct mdss_mdp_ctl *ctl = NULL;
@ -48,6 +49,7 @@ void mdss_check_dsi_ctrl_status(struct work_struct *work, uint32_t interval)
pr_err("%s: Panel data not available\n", __func__);
return;
}
mipi = &pdata->panel_info.mipi;
ctrl_pdata = container_of(pdata, struct mdss_dsi_ctrl_pdata,
panel_data);
@ -73,14 +75,20 @@ void mdss_check_dsi_ctrl_status(struct work_struct *work, uint32_t interval)
}
mutex_lock(&ctrl_pdata->mutex);
if (ctl->shared_lock)
mutex_lock(ctl->shared_lock);
/*
* TODO: Because mdss_dsi_cmd_mdp_busy has made sure DMA to
* be idle in mdss_dsi_cmdlist_commit, it is not necessary
* to acquire ov_lock in case of video mode. Removing this
* lock to fix issues so that ESD thread would not block other
* overlay operations. Need refine this lock for command mode
*/
if (mipi->mode == DSI_CMD_MODE)
mutex_lock(&mdp5_data->ov_lock);
if (mdss_panel_is_power_off(pstatus_data->mfd->panel_power_state)) {
if (mipi->mode == DSI_CMD_MODE)
mutex_unlock(&mdp5_data->ov_lock);
if (ctl->shared_lock)
mutex_unlock(ctl->shared_lock);
mutex_unlock(&ctrl_pdata->mutex);
pr_err("%s: DSI turning off, avoiding panel status check\n",
__func__);
@ -106,9 +114,8 @@ void mdss_check_dsi_ctrl_status(struct work_struct *work, uint32_t interval)
ret = ctrl_pdata->check_status(ctrl_pdata);
mdss_mdp_clk_ctrl(MDP_BLOCK_POWER_OFF);
if (mipi->mode == DSI_CMD_MODE)
mutex_unlock(&mdp5_data->ov_lock);
if (ctl->shared_lock)
mutex_unlock(ctl->shared_lock);
mutex_unlock(&ctrl_pdata->mutex);
if ((pstatus_data->mfd->panel_power_state == MDSS_PANEL_POWER_ON)) {