Hi,
On 03/31/2016 12:23 AM, Mark Brown wrote:
> The voltage changing code in this driver is broken and should be
> removed. The driver sets a single, exact voltage on probe. Unless
> there is a very good reason for this (which should be documented in
> comments) constraints like this need to be set via the machine
> constraints, voltage setting in a driver is expected to be used in cases
> where the voltage varies at runtime.
>
> In addition client drivers should almost never be calling
> regulator_can_set_voltage(), if the device needs to set a voltage it
> needs to set the voltage and the regulator core will handle the case
> where the regulator is fixed voltage. If the driver simply skips
> setting the voltage if it doesn't have permission then it shouild just
s/shouild/should
Could you also pull in the diff I've added below? It removes another
set_voltage call from the hdmi driver and the struct members used to
manage the voltage range.
> not bother in the first place.
>
+John, you'll need to update your regulator nodes with the min/max
voltage values in your N7 dtsi whenever you plan to rebase next.
Thanks,
Archit
> Signed-off-by: Mark Brown <broonie at kernel.org>
> ---
> drivers/gpu/drm/msm/dsi/dsi_host.c | 12 ------------
> 1 file changed, 12 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c
> b/drivers/gpu/drm/msm/dsi/dsi_host.c
> index 4282ec6bbaaf..a3e47ad83eb3 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi_host.c
> +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
> @@ -325,18 +325,6 @@ static int dsi_regulator_init(struct msm_dsi_host
> *msm_host)
> return ret;
> }
>
> - for (i = 0; i < num; i++) {
> - if (regulator_can_change_voltage(s[i].consumer)) {
> - ret = regulator_set_voltage(s[i].consumer,
> - regs[i].min_voltage, regs[i].max_voltage);
> - if (ret < 0) {
> - pr_err("regulator %d set voltage failed, %d\n",
> - i, ret);
> - return ret;
> - }
> - }
> - }
> -
> return 0;
> }
>
>
---8<---
diff --git a/drivers/gpu/drm/msm/dsi/dsi.h b/drivers/gpu/drm/msm/dsi/dsi.h
index 749fbb2..03f115f 100644
--- a/drivers/gpu/drm/msm/dsi/dsi.h
+++ b/drivers/gpu/drm/msm/dsi/dsi.h
@@ -41,8 +41,6 @@ enum msm_dsi_phy_type {
/* Regulators for DSI devices */
struct dsi_reg_entry {
char name[32];
- int min_voltage;
- int max_voltage;
int enable_load;
int disable_load;
};
diff --git a/drivers/gpu/drm/msm/dsi/dsi_cfg.c
b/drivers/gpu/drm/msm/dsi/dsi_cfg.c
index e58e9b9..cc802bb 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_cfg.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_cfg.c
@@ -22,9 +22,9 @@ static const struct msm_dsi_config apq8064_dsi_cfg = {
.reg_cfg = {
.num = 3,
.regs = {
- {"vdda", 1200000, 1200000, 100000, 100},
- {"avdd", 3000000, 3000000, 110000, 100},
- {"vddio", 1800000, 1800000, 100000, 100},
+ {"vdda", 100000, 100},
+ {"avdd", 10000, 100},
+ {"vddio", 100000, 100},
},
},
.bus_clk_names = dsi_v2_bus_clk_names,
@@ -40,10 +40,10 @@ static const struct msm_dsi_config
msm8974_apq8084_dsi_cfg = {
.reg_cfg = {
.num = 4,
.regs = {
- {"gdsc", -1, -1, -1, -1},
- {"vdd", 3000000, 3000000, 150000, 100},
- {"vdda", 1200000, 1200000, 100000, 100},
- {"vddio", 1800000, 1800000, 100000, 100},
+ {"gdsc", -1, -1},
+ {"vdd", 150000, 100},
+ {"vdda", 100000, 100},
+ {"vddio", 100000, 100},
},
},
.bus_clk_names = dsi_6g_bus_clk_names,
@@ -59,9 +59,9 @@ static const struct msm_dsi_config msm8916_dsi_cfg = {
.reg_cfg = {
.num = 3,
.regs = {
- {"gdsc", -1, -1, -1, -1},
- {"vdda", 1200000, 1200000, 100000, 100},
- {"vddio", 1800000, 1800000, 100000, 100},
+ {"gdsc", -1, -1},
+ {"vdda", 100000, 100},
+ {"vddio", 100000, 100},
},
},
.bus_clk_names = dsi_8916_bus_clk_names,
@@ -73,13 +73,13 @@ static const struct msm_dsi_config msm8994_dsi_cfg = {
.reg_cfg = {
.num = 7,
.regs = {
- {"gdsc", -1, -1, -1, -1},
- {"vdda", 1250000, 1250000, 100000, 100},
- {"vddio", 1800000, 1800000, 100000, 100},
- {"vcca", 1000000, 1000000, 10000, 100},
- {"vdd", 1800000, 1800000, 100000, 100},
- {"lab_reg", -1, -1, -1, -1},
- {"ibb_reg", -1, -1, -1, -1},
+ {"gdsc", -1, -1},
+ {"vdda", 100000, 100},
+ {"vddio", 100000, 100},
+ {"vcca", 10000, 100},
+ {"vdd", 100000, 100},
+ {"lab_reg", -1, -1},
+ {"ibb_reg", -1, -1},
},
},
.bus_clk_names = dsi_6g_bus_clk_names,
diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
index 91a95fb..e2f42d8 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
@@ -177,19 +177,6 @@ static int dsi_phy_regulator_init(struct
msm_dsi_phy *phy)
return ret;
}
- for (i = 0; i < num; i++) {
- if (regulator_can_change_voltage(s[i].consumer)) {
- ret = regulator_set_voltage(s[i].consumer,
- regs[i].min_voltage, regs[i].max_voltage);
- if (ret < 0) {
- dev_err(dev,
- "regulator %d set voltage failed, %d\n",
- i, ret);
- return ret;
- }
- }
- }
-
return 0;
}
diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_20nm.c
b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_20nm.c
index 2e9ba11..3c93cfc 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_20nm.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_20nm.c
@@ -138,8 +138,8 @@ const struct msm_dsi_phy_cfg dsi_phy_20nm_cfgs = {
.reg_cfg = {
.num = 2,
.regs = {
- {"vddio", 1800000, 1800000, 100000, 100},
- {"vcca", 1000000, 1000000, 10000, 100},
+ {"vddio", 100000, 100},
+ {"vcca", 10000, 100},
},
},
.ops = {
diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm.c
b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm.c
index edf7411..397f09a 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm.c
@@ -138,7 +138,7 @@ const struct msm_dsi_phy_cfg dsi_phy_28nm_hpm_cfgs = {
.reg_cfg = {
.num = 1,
.regs = {
- {"vddio", 1800000, 1800000, 100000, 100},
+ {"vddio", 100000, 100},
},
},
.ops = {
@@ -153,7 +153,7 @@ const struct msm_dsi_phy_cfg dsi_phy_28nm_lp_cfgs = {
.reg_cfg = {
.num = 1,
.regs = {
- {"vddio", 1800000, 1800000, 100000, 100},
+ {"vddio", 100000, 100},
},
},
.ops = {
diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm_8960.c
b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm_8960.c
index 197b039..4ed7b57 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm_8960.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm_8960.c
@@ -185,7 +185,7 @@ const struct msm_dsi_phy_cfg dsi_phy_28nm_8960_cfgs = {
.reg_cfg = {
.num = 1,
.regs = {
- {"vddio", 1800000, 1800000, 100000, 100},
+ {"vddio", 100000, 100},
},
},
.ops = {
--->8---
--
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