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msm: mdss: add support to control dcs brightness with HS state

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Some special panels may need high speed mode to send brightness
to avoid panel issues, adding this change can make a better user
experience using these panels.

Change-Id: Id2cd4b3652892cc7677d7c6863a67d93e24d980f
Signed-off-by: Yahui Wang <yahuiw@codeaurora.org>
This commit is contained in:
Yahui Wang 2017-06-07 09:40:03 +08:00
parent 8efb4552d1
commit e58eb7c0ca
3 changed files with 17 additions and 0 deletions
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4
Documentation/devicetree/bindings/fb/mdss-dsi-panel.txt
View file

@ -187,6 +187,10 @@ Optional properties:
"bl_ctrl_wled" = Backlight controlled by WLED.
"bl_ctrl_dcs" = Backlight controlled by DCS commands.
other: Unknown backlight control. (default)
- qcom,mdss-dsi-bl-dcs-command-state: A string that specifies the ctrl state for sending brightness
controlling commands, this is only available when backlight is controlled by DCS commands.
"dsi_lp_mode" = DSI low power mode (default).
"dsi_hs_mode" = DSI high speed mode.
- qcom,mdss-dsi-bl-pwm-pmi: Boolean to indicate that PWM control is through second pmic chip.
- qcom,mdss-dsi-bl-pmic-bank-select: LPG channel for backlight.
Requred if blpmiccontroltype is PWM

1
drivers/video/fbdev/msm/mdss_dsi.h
View file

@ -459,6 +459,7 @@ struct mdss_dsi_ctrl_pdata {
bool avdd_en_gpio_invert;
int lcd_mode_sel_gpio;
int bklt_ctrl; /* backlight ctrl */
enum dsi_ctrl_op_mode bklt_dcs_op_mode; /* backlight dcs ctrl mode */
bool pwm_pmi;
int pwm_period;
int pwm_pmic_gpio;

12
drivers/video/fbdev/msm/mdss_dsi_panel.c
View file

@ -238,6 +238,11 @@ static void mdss_dsi_panel_bklt_dcs(struct mdss_dsi_ctrl_pdata *ctrl, int level)
cmdreq.rlen = 0;
cmdreq.cb = NULL;
if (ctrl->bklt_dcs_op_mode == DSI_HS_MODE)
cmdreq.flags |= CMD_REQ_HS_MODE;
else
cmdreq.flags |= CMD_REQ_LP_MODE;
mdss_dsi_cmdlist_put(ctrl, &cmdreq);
}
@ -2413,6 +2418,13 @@ int mdss_panel_parse_bl_settings(struct device_node *np,
}
} else if (!strcmp(data, "bl_ctrl_dcs")) {
ctrl_pdata->bklt_ctrl = BL_DCS_CMD;
data = of_get_property(np,
"qcom,mdss-dsi-bl-dcs-command-state", NULL);
if (data && !strcmp(data, "dsi_hs_mode"))
ctrl_pdata->bklt_dcs_op_mode = DSI_HS_MODE;
else
ctrl_pdata->bklt_dcs_op_mode = DSI_LP_MODE;
pr_debug("%s: Configured DCS_CMD bklt ctrl\n",
__func__);
}