diff options
| author | Ray Zhang <rayz@codeaurora.org> | 2014-12-10 15:30:48 +0800 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-23 21:11:41 -0700 |
| commit | 197399a2dace7275d94cfb7b5c38bc12839e451f (patch) | |
| tree | 23daa558bc2b1d675efd979b3cfffdf9e2f44354 /drivers/video/fbdev | |
| parent | 4aef0900ff34106e850c8e83f0d40a424da8e407 (diff) | |
msm: mdss: Disable idle pc during unblank
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>
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>
Diffstat (limited to 'drivers/video/fbdev')
| -rw-r--r-- | drivers/video/fbdev/msm/mdss_dsi.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/video/fbdev/msm/mdss_dsi.c b/drivers/video/fbdev/msm/mdss_dsi.c index b6d3eb5e2873..1904bf395ed5 100644 --- a/drivers/video/fbdev/msm/mdss_dsi.c +++ b/drivers/video/fbdev/msm/mdss_dsi.c @@ -25,6 +25,7 @@ #include <linux/clk.h> #include <linux/uaccess.h> #include <linux/msm-bus.h> +#include <linux/pm_qos.h> #include "mdss.h" #include "mdss_panel.h" @@ -37,6 +38,30 @@ /* 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); @@ -1407,6 +1432,8 @@ static int mdss_dsi_unblank(struct mdss_panel_data *pdata) __func__, ctrl_pdata, ctrl_pdata->ndx, pdata->panel_info.blank_state, ctrl_pdata->ctrl_state); + mdss_dsi_pm_qos_update_request(DSI_DISABLE_PC_LATENCY); + if (mdss_dsi_is_ctrl_clk_master(ctrl_pdata)) sctrl = mdss_dsi_get_ctrl_clk_slave(); @@ -1448,6 +1475,9 @@ error: if (sctrl) mdss_dsi_clk_ctrl(sctrl, sctrl->dsi_clk_handle, MDSS_DSI_ALL_CLKS, MDSS_DSI_CLK_OFF); + + mdss_dsi_pm_qos_update_request(DSI_ENABLE_PC_LATENCY); + pr_debug("%s-:\n", __func__); return ret; @@ -2686,6 +2716,8 @@ static int mdss_dsi_ctrl_probe(struct platform_device *pdev) else ctrl_pdata->shared_data->dsi1_active = true; + mdss_dsi_pm_qos_add_request(); + return 0; error_shadow_clk_deinit: @@ -3145,6 +3177,8 @@ 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) |