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SubjectRe: [PATCH v3 3/6] drm/msm/dsi: Don't set a load before disabling a regulator
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On 8/2/2022 3:37 PM, Douglas Anderson wrote:
> As of commit 5451781dadf8 ("regulator: core: Only count load for
> enabled consumers"), a load isn't counted for a disabled
> regulator. That means all the code in the DSI driver to specify and
> set loads before disabling a regulator is not actually doing anything
> useful. Let's remove it.
>
> It should be noted that all of the loads set that were being specified
> were pointless noise anyway. The only use for this number is to pick
> between low power and high power modes of regulators. Regulators
> appear to do this changeover at loads on the order of 10000 uA. You
> would need a lot of clients of the same rail for that 100 uA number to
> count for anything.
>
> Note that now that we get rid of the setting of the load at disable
> time, we can just set the load once when we first get the regulator
> and then forget it.
>
> It should also be noted that the regulator functions
> regulator_bulk_enable() and regulator_set_load() already print error
> messages when they encounter problems so while moving things around we
> get rid of some extra error prints.
>
> Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
> ---
>
> Changes in v3:
> - Fix typo in commit message.
> - Just directly call the bulk commands; get rid of the wrapper.
>
> drivers/gpu/drm/msm/dsi/dsi.h | 1 -
> drivers/gpu/drm/msm/dsi/dsi_cfg.c | 52 +++++++-------
> drivers/gpu/drm/msm/dsi/dsi_host.c | 71 ++++---------------
> drivers/gpu/drm/msm/dsi/phy/dsi_phy.c | 52 ++------------
> drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c | 4 +-
> drivers/gpu/drm/msm/dsi/phy/dsi_phy_14nm.c | 6 +-
> drivers/gpu/drm/msm/dsi/phy/dsi_phy_20nm.c | 4 +-
> drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm.c | 6 +-
> .../gpu/drm/msm/dsi/phy/dsi_phy_28nm_8960.c | 2 +-
> drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c | 6 +-
> 10 files changed, 60 insertions(+), 144 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/dsi/dsi.h b/drivers/gpu/drm/msm/dsi/dsi.h
> index 580a1e6358bf..bb6a5bd05cb1 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi.h
> +++ b/drivers/gpu/drm/msm/dsi/dsi.h
> @@ -37,7 +37,6 @@ enum msm_dsi_phy_usecase {
> struct dsi_reg_entry {
> char name[32];
> int enable_load;
> - int disable_load;
> };
>
> struct dsi_reg_config {
> diff --git a/drivers/gpu/drm/msm/dsi/dsi_cfg.c b/drivers/gpu/drm/msm/dsi/dsi_cfg.c
> index 72c018e26f47..901d6fd53800 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi_cfg.c
> +++ b/drivers/gpu/drm/msm/dsi/dsi_cfg.c
> @@ -14,9 +14,9 @@ static const struct msm_dsi_config apq8064_dsi_cfg = {
> .reg_cfg = {
> .num = 3,
> .regs = {
> - {"vdda", 100000, 100}, /* 1.2 V */
> - {"avdd", 10000, 100}, /* 3.0 V */
> - {"vddio", 100000, 100}, /* 1.8 V */
> + {"vdda", 100000}, /* 1.2 V */
> + {"avdd", 10000}, /* 3.0 V */
> + {"vddio", 100000}, /* 1.8 V */
> },
> },
> .bus_clk_names = dsi_v2_bus_clk_names,
> @@ -34,9 +34,9 @@ static const struct msm_dsi_config msm8974_apq8084_dsi_cfg = {
> .reg_cfg = {
> .num = 3,
> .regs = {
> - {"vdd", 150000, 100}, /* 3.0 V */
> - {"vdda", 100000, 100}, /* 1.2 V */
> - {"vddio", 100000, 100}, /* 1.8 V */
> + {"vdd", 150000}, /* 3.0 V */
> + {"vdda", 100000}, /* 1.2 V */
> + {"vddio", 100000}, /* 1.8 V */
> },
> },
> .bus_clk_names = dsi_6g_bus_clk_names,
> @@ -54,8 +54,8 @@ static const struct msm_dsi_config msm8916_dsi_cfg = {
> .reg_cfg = {
> .num = 2,
> .regs = {
> - {"vdda", 100000, 100}, /* 1.2 V */
> - {"vddio", 100000, 100}, /* 1.8 V */
> + {"vdda", 100000}, /* 1.2 V */
> + {"vddio", 100000}, /* 1.8 V */
> },
> },
> .bus_clk_names = dsi_8916_bus_clk_names,
> @@ -73,8 +73,8 @@ static const struct msm_dsi_config msm8976_dsi_cfg = {
> .reg_cfg = {
> .num = 2,
> .regs = {
> - {"vdda", 100000, 100}, /* 1.2 V */
> - {"vddio", 100000, 100}, /* 1.8 V */
> + {"vdda", 100000}, /* 1.2 V */
> + {"vddio", 100000}, /* 1.8 V */
> },
> },
> .bus_clk_names = dsi_8976_bus_clk_names,
> @@ -88,12 +88,12 @@ static const struct msm_dsi_config msm8994_dsi_cfg = {
> .reg_cfg = {
> .num = 6,
> .regs = {
> - {"vdda", 100000, 100}, /* 1.25 V */
> - {"vddio", 100000, 100}, /* 1.8 V */
> - {"vcca", 10000, 100}, /* 1.0 V */
> - {"vdd", 100000, 100}, /* 1.8 V */
> - {"lab_reg", -1, -1},
> - {"ibb_reg", -1, -1},
> + {"vdda", 100000}, /* 1.25 V */
> + {"vddio", 100000}, /* 1.8 V */
> + {"vcca", 10000}, /* 1.0 V */
> + {"vdd", 100000}, /* 1.8 V */
> + {"lab_reg", -1},
> + {"ibb_reg", -1},
> },
> },
> .bus_clk_names = dsi_6g_bus_clk_names,
> @@ -111,9 +111,9 @@ static const struct msm_dsi_config msm8996_dsi_cfg = {
> .reg_cfg = {
> .num = 3,
> .regs = {
> - {"vdda", 18160, 1 }, /* 1.25 V */
> - {"vcca", 17000, 32 }, /* 0.925 V */
> - {"vddio", 100000, 100 },/* 1.8 V */
> + {"vdda", 18160}, /* 1.25 V */
> + {"vcca", 17000}, /* 0.925 V */
> + {"vddio", 100000},/* 1.8 V */
> },
> },
> .bus_clk_names = dsi_8996_bus_clk_names,
> @@ -131,8 +131,8 @@ static const struct msm_dsi_config msm8998_dsi_cfg = {
> .reg_cfg = {
> .num = 2,
> .regs = {
> - {"vdd", 367000, 16 }, /* 0.9 V */
> - {"vdda", 62800, 2 }, /* 1.2 V */
> + {"vdd", 367000}, /* 0.9 V */
> + {"vdda", 62800}, /* 1.2 V */
> },
> },
> .bus_clk_names = dsi_msm8998_bus_clk_names,
> @@ -150,7 +150,7 @@ static const struct msm_dsi_config sdm660_dsi_cfg = {
> .reg_cfg = {
> .num = 1,
> .regs = {
> - {"vdda", 12560, 4 }, /* 1.2 V */
> + {"vdda", 12560}, /* 1.2 V */
> },
> },
> .bus_clk_names = dsi_sdm660_bus_clk_names,
> @@ -172,7 +172,7 @@ static const struct msm_dsi_config sdm845_dsi_cfg = {
> .reg_cfg = {
> .num = 1,
> .regs = {
> - {"vdda", 21800, 4 }, /* 1.2 V */
> + {"vdda", 21800}, /* 1.2 V */
> },
> },
> .bus_clk_names = dsi_sdm845_bus_clk_names,
> @@ -186,7 +186,7 @@ static const struct msm_dsi_config sc7180_dsi_cfg = {
> .reg_cfg = {
> .num = 1,
> .regs = {
> - {"vdda", 21800, 4 }, /* 1.2 V */
> + {"vdda", 21800}, /* 1.2 V */
> },
> },
> .bus_clk_names = dsi_sc7180_bus_clk_names,
> @@ -204,7 +204,7 @@ static const struct msm_dsi_config sc7280_dsi_cfg = {
> .reg_cfg = {
> .num = 1,
> .regs = {
> - {"vdda", 8350, 0 }, /* 1.2 V */
> + {"vdda", 8350}, /* 1.2 V */
> },
> },
> .bus_clk_names = dsi_sc7280_bus_clk_names,
> @@ -222,7 +222,7 @@ static const struct msm_dsi_config qcm2290_dsi_cfg = {
> .reg_cfg = {
> .num = 1,
> .regs = {
> - {"vdda", 21800, 4 }, /* 1.2 V */
> + {"vdda", 21800}, /* 1.2 V */
> },
> },
> .bus_clk_names = dsi_qcm2290_bus_clk_names,
> diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
> index a95d5df52653..9df278d39559 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi_host.c
> +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
> @@ -203,9 +203,6 @@ static inline void dsi_write(struct msm_dsi_host *msm_host, u32 reg, u32 data)
> msm_writel(data, msm_host->ctrl_base + reg);
> }
>
> -static int dsi_host_regulator_enable(struct msm_dsi_host *msm_host);
> -static void dsi_host_regulator_disable(struct msm_dsi_host *msm_host);
> -
> static const struct msm_dsi_cfg_handler *dsi_get_config(
> struct msm_dsi_host *msm_host)
> {
> @@ -256,56 +253,6 @@ static inline struct msm_dsi_host *to_msm_dsi_host(struct mipi_dsi_host *host)
> return container_of(host, struct msm_dsi_host, base);
> }
>
> -static void dsi_host_regulator_disable(struct msm_dsi_host *msm_host)
> -{
> - struct regulator_bulk_data *s = msm_host->supplies;
> - const struct dsi_reg_entry *regs = msm_host->cfg_hnd->cfg->reg_cfg.regs;
> - int num = msm_host->cfg_hnd->cfg->reg_cfg.num;
> - int i;
> -
> - DBG("");
> - for (i = num - 1; i >= 0; i--)
> - if (regs[i].disable_load >= 0)
> - regulator_set_load(s[i].consumer,
> - regs[i].disable_load);
> -
> - regulator_bulk_disable(num, s);
> -}
> -
> -static int dsi_host_regulator_enable(struct msm_dsi_host *msm_host)
> -{
> - struct regulator_bulk_data *s = msm_host->supplies;
> - const struct dsi_reg_entry *regs = msm_host->cfg_hnd->cfg->reg_cfg.regs;
> - int num = msm_host->cfg_hnd->cfg->reg_cfg.num;
> - int ret, i;
> -
> - DBG("");
> - for (i = 0; i < num; i++) {
> - if (regs[i].enable_load >= 0) {
> - ret = regulator_set_load(s[i].consumer,
> - regs[i].enable_load);
> - if (ret < 0) {
> - pr_err("regulator %d set op mode failed, %d\n",
> - i, ret);
> - goto fail;
> - }
> - }
> - }
> -
> - ret = regulator_bulk_enable(num, s);
> - if (ret < 0) {
> - pr_err("regulator enable failed, %d\n", ret);
> - goto fail;
> - }
> -
> - return 0;
> -
> -fail:
> - for (i--; i >= 0; i--)
> - regulator_set_load(s[i].consumer, regs[i].disable_load);
> - return ret;
> -}
> -
> static int dsi_regulator_init(struct msm_dsi_host *msm_host)
> {
> struct regulator_bulk_data *s = msm_host->supplies;
> @@ -323,6 +270,15 @@ static int dsi_regulator_init(struct msm_dsi_host *msm_host)
> return ret;
> }
>
> + for (i = 0; i < num; i++) {
> + if (regs[i].enable_load >= 0) {
> + ret = regulator_set_load(s[i].consumer,
> + regs[i].enable_load);
> + if (ret < 0)
> + return ret;
> + }
> + }
> +
> return 0;
> }
>
> @@ -2561,7 +2517,8 @@ int msm_dsi_host_power_on(struct mipi_dsi_host *host,
>
> msm_dsi_sfpb_config(msm_host, true);
>
> - ret = dsi_host_regulator_enable(msm_host);
> + ret = regulator_bulk_enable(msm_host->cfg_hnd->cfg->reg_cfg.num,
> + msm_host->supplies);
> if (ret) {
> pr_err("%s:Failed to enable vregs.ret=%d\n",
> __func__, ret);
> @@ -2601,7 +2558,8 @@ int msm_dsi_host_power_on(struct mipi_dsi_host *host,
> cfg_hnd->ops->link_clk_disable(msm_host);
> pm_runtime_put(&msm_host->pdev->dev);
> fail_disable_reg:
> - dsi_host_regulator_disable(msm_host);
> + regulator_bulk_disable(msm_host->cfg_hnd->cfg->reg_cfg.num,
> + msm_host->supplies);
> unlock_ret:
> mutex_unlock(&msm_host->dev_mutex);
> return ret;
> @@ -2628,7 +2586,8 @@ int msm_dsi_host_power_off(struct mipi_dsi_host *host)
> cfg_hnd->ops->link_clk_disable(msm_host);
> pm_runtime_put(&msm_host->pdev->dev);
>
> - dsi_host_regulator_disable(msm_host);
> + regulator_bulk_disable(msm_host->cfg_hnd->cfg->reg_cfg.num,
> + msm_host->supplies);
>
> msm_dsi_sfpb_config(msm_host, false);
>
> diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
> index a39de3bdc7fa..7c105120d73e 100644
> --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
> +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
> @@ -529,58 +529,16 @@ static int dsi_phy_regulator_init(struct msm_dsi_phy *phy)
> return ret;
> }
>
> - return 0;
> -}
> -
> -static void dsi_phy_regulator_disable(struct msm_dsi_phy *phy)
> -{
> - struct regulator_bulk_data *s = phy->supplies;
> - const struct dsi_reg_entry *regs = phy->cfg->reg_cfg.regs;
> - int num = phy->cfg->reg_cfg.num;
> - int i;
> -
> - DBG("");
> - for (i = num - 1; i >= 0; i--)
> - if (regs[i].disable_load >= 0)
> - regulator_set_load(s[i].consumer, regs[i].disable_load);
> -
> - regulator_bulk_disable(num, s);
> -}
> -
> -static int dsi_phy_regulator_enable(struct msm_dsi_phy *phy)
> -{
> - struct regulator_bulk_data *s = phy->supplies;
> - const struct dsi_reg_entry *regs = phy->cfg->reg_cfg.regs;
> - struct device *dev = &phy->pdev->dev;
> - int num = phy->cfg->reg_cfg.num;
> - int ret, i;
> -
> - DBG("");
> for (i = 0; i < num; i++) {
> if (regs[i].enable_load >= 0) {
> ret = regulator_set_load(s[i].consumer,
> regs[i].enable_load);
> - if (ret < 0) {
> - DRM_DEV_ERROR(dev,
> - "regulator %d set op mode failed, %d\n",
> - i, ret);
> - goto fail;
> - }
> + if (ret < 0)
> + return ret;
> }
> }
>
> - ret = regulator_bulk_enable(num, s);
> - if (ret < 0) {
> - DRM_DEV_ERROR(dev, "regulator enable failed, %d\n", ret);
> - goto fail;
> - }
> -
> return 0;
> -
> -fail:
> - for (i--; i >= 0; i--)
> - regulator_set_load(s[i].consumer, regs[i].disable_load);
> - return ret;
> }
>
> static int dsi_phy_enable_resource(struct msm_dsi_phy *phy)
> @@ -829,7 +787,7 @@ int msm_dsi_phy_enable(struct msm_dsi_phy *phy,
> goto res_en_fail;
> }
>
> - ret = dsi_phy_regulator_enable(phy);
> + ret = regulator_bulk_enable(phy->cfg->reg_cfg.num, phy->supplies);
> if (ret) {
> DRM_DEV_ERROR(dev, "%s: regulator enable failed, %d\n",
> __func__, ret);
> @@ -866,7 +824,7 @@ int msm_dsi_phy_enable(struct msm_dsi_phy *phy,
> if (phy->cfg->ops.disable)
> phy->cfg->ops.disable(phy);
> phy_en_fail:
> - dsi_phy_regulator_disable(phy);
> + regulator_bulk_disable(phy->cfg->reg_cfg.num, phy->supplies);
> reg_en_fail:
> dsi_phy_disable_resource(phy);
> res_en_fail:
> @@ -880,7 +838,7 @@ void msm_dsi_phy_disable(struct msm_dsi_phy *phy)
>
> phy->cfg->ops.disable(phy);
>
> - dsi_phy_regulator_disable(phy);
> + regulator_bulk_disable(phy->cfg->reg_cfg.num, phy->supplies);
> dsi_phy_disable_resource(phy);
> }
>
> diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c
> index 08b015ea1b1e..6a10a1448051 100644
> --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c
> +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c
> @@ -1033,7 +1033,7 @@ const struct msm_dsi_phy_cfg dsi_phy_10nm_cfgs = {
> .reg_cfg = {
> .num = 1,
> .regs = {
> - {"vdds", 36000, 32},
> + {"vdds", 36000},
> },
> },
> .ops = {
> @@ -1055,7 +1055,7 @@ const struct msm_dsi_phy_cfg dsi_phy_10nm_8998_cfgs = {
> .reg_cfg = {
> .num = 1,
> .regs = {
> - {"vdds", 36000, 32},
> + {"vdds", 36000},
> },
> },
> .ops = {
> diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_14nm.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_14nm.c
> index 8199c53567f4..0f3d4c56c333 100644
> --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_14nm.c
> +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_14nm.c
> @@ -1029,7 +1029,7 @@ const struct msm_dsi_phy_cfg dsi_phy_14nm_cfgs = {
> .reg_cfg = {
> .num = 1,
> .regs = {
> - {"vcca", 17000, 32},
> + {"vcca", 17000},
> },
> },
> .ops = {
> @@ -1050,7 +1050,7 @@ const struct msm_dsi_phy_cfg dsi_phy_14nm_660_cfgs = {
> .reg_cfg = {
> .num = 1,
> .regs = {
> - {"vcca", 73400, 32},
> + {"vcca", 73400},
> },
> },
> .ops = {
> @@ -1071,7 +1071,7 @@ const struct msm_dsi_phy_cfg dsi_phy_14nm_8953_cfgs = {
> .reg_cfg = {
> .num = 1,
> .regs = {
> - {"vcca", 17000, 32},
> + {"vcca", 17000},
> },
> },
> .ops = {
> 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 ee7c418a1c29..b7c621d94981 100644
> --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_20nm.c
> +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_20nm.c
> @@ -134,8 +134,8 @@ const struct msm_dsi_phy_cfg dsi_phy_20nm_cfgs = {
> .reg_cfg = {
> .num = 2,
> .regs = {
> - {"vddio", 100000, 100}, /* 1.8 V */
> - {"vcca", 10000, 100}, /* 1.0 V */
> + {"vddio", 100000}, /* 1.8 V */
> + {"vcca", 10000}, /* 1.0 V */
> },
> },
> .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 48eab80b548e..6beba387640d 100644
> --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm.c
> +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm.c
> @@ -774,7 +774,7 @@ const struct msm_dsi_phy_cfg dsi_phy_28nm_hpm_cfgs = {
> .reg_cfg = {
> .num = 1,
> .regs = {
> - {"vddio", 100000, 100},
> + {"vddio", 100000},
> },
> },
> .ops = {
> @@ -795,7 +795,7 @@ const struct msm_dsi_phy_cfg dsi_phy_28nm_hpm_famb_cfgs = {
> .reg_cfg = {
> .num = 1,
> .regs = {
> - {"vddio", 100000, 100},
> + {"vddio", 100000},
> },
> },
> .ops = {
> @@ -816,7 +816,7 @@ const struct msm_dsi_phy_cfg dsi_phy_28nm_lp_cfgs = {
> .reg_cfg = {
> .num = 1,
> .regs = {
> - {"vddio", 100000, 100}, /* 1.8 V */
> + {"vddio", 100000}, /* 1.8 V */
> },
> },
> .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 fc56cdcc9ad6..2e942b10fffa 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
> @@ -653,7 +653,7 @@ const struct msm_dsi_phy_cfg dsi_phy_28nm_8960_cfgs = {
> .reg_cfg = {
> .num = 1,
> .regs = {
> - {"vddio", 100000, 100}, /* 1.8 V */
> + {"vddio", 100000}, /* 1.8 V */
> },
> },
> .ops = {
> diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
> index 66ed1919a1db..9c7c49ce1200 100644
> --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
> +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
> @@ -1041,7 +1041,7 @@ const struct msm_dsi_phy_cfg dsi_phy_7nm_cfgs = {
> .reg_cfg = {
> .num = 1,
> .regs = {
> - {"vdds", 36000, 32},
> + {"vdds", 36000},
> },
> },
> .ops = {
> @@ -1068,7 +1068,7 @@ const struct msm_dsi_phy_cfg dsi_phy_7nm_8150_cfgs = {
> .reg_cfg = {
> .num = 1,
> .regs = {
> - {"vdds", 36000, 32},
> + {"vdds", 36000},
> },
> },
> .ops = {
> @@ -1090,7 +1090,7 @@ const struct msm_dsi_phy_cfg dsi_phy_7nm_7280_cfgs = {
> .reg_cfg = {
> .num = 1,
> .regs = {
> - {"vdds", 37550, 0},
> + {"vdds", 37550},
> },
> },
> .ops = {

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