drm/msm/dsi: drop gdsc regulator handling

None of supported devies uses "gdsc" regulator for DSI. GDSC support is
now implemented as a power domain. Drop old code and config handling
gdsc regulator requesting and enabling.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20210701000015.3347713-1-dmitry.baryshkov@linaro.orgReviewed-by: Abhinav Kumar <abhinavk@codeaurora.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>

drivers/gpu/drm/msm/dsi/dsi_cfg.c

@@ -32,9 +32,8 @@ static const char * const dsi_6g_bus_clk_names[] = {
 static const struct msm_dsi_config msm8974_apq8084_dsi_cfg = {
 	.io_offset = DSI_6G_REG_SHIFT,
 	.reg_cfg = {
-		.num = 4,
+		.num = 3,
 		.regs = {
-			{"gdsc", -1, -1},
 			{"vdd", 150000, 100},	/* 3.0 V */
 			{"vdda", 100000, 100},	/* 1.2 V */
 			{"vddio", 100000, 100},	/* 1.8 V */
@@ -53,9 +52,8 @@ static const char * const dsi_8916_bus_clk_names[] = {
 static const struct msm_dsi_config msm8916_dsi_cfg = {
 	.io_offset = DSI_6G_REG_SHIFT,
 	.reg_cfg = {
-		.num = 3,
+		.num = 2,
 		.regs = {
-			{"gdsc", -1, -1},
 			{"vdda", 100000, 100},	/* 1.2 V */
 			{"vddio", 100000, 100},	/* 1.8 V */
 		},
@@ -73,9 +71,8 @@ static const char * const dsi_8976_bus_clk_names[] = {
 static const struct msm_dsi_config msm8976_dsi_cfg = {
 	.io_offset = DSI_6G_REG_SHIFT,
 	.reg_cfg = {
-		.num = 3,
+		.num = 2,
 		.regs = {
-			{"gdsc", -1, -1},
 			{"vdda", 100000, 100},	/* 1.2 V */
 			{"vddio", 100000, 100},	/* 1.8 V */
 		},
@@ -89,9 +86,8 @@ static const struct msm_dsi_config msm8976_dsi_cfg = {
 static const struct msm_dsi_config msm8994_dsi_cfg = {
 	.io_offset = DSI_6G_REG_SHIFT,
 	.reg_cfg = {
-		.num = 7,
+		.num = 6,
 		.regs = {
-			{"gdsc", -1, -1},
 			{"vdda", 100000, 100},	/* 1.25 V */
 			{"vddio", 100000, 100},	/* 1.8 V */
 			{"vcca", 10000, 100},	/* 1.0 V */

drivers/gpu/drm/msm/dsi/dsi_host.c

@@ -207,35 +207,22 @@ static const struct msm_dsi_cfg_handler *dsi_get_config(
 {
 	const struct msm_dsi_cfg_handler *cfg_hnd = NULL;
 	struct device *dev = &msm_host->pdev->dev;
-	struct regulator *gdsc_reg;
 	struct clk *ahb_clk;
 	int ret;
 	u32 major = 0, minor = 0;
 
-	gdsc_reg = regulator_get(dev, "gdsc");
-	if (IS_ERR(gdsc_reg)) {
-		pr_err("%s: cannot get gdsc\n", __func__);
-		goto exit;
-	}
-
 	ahb_clk = msm_clk_get(msm_host->pdev, "iface");
 	if (IS_ERR(ahb_clk)) {
 		pr_err("%s: cannot get interface clock\n", __func__);
-		goto put_gdsc;
+		goto exit;
 	}
 
 	pm_runtime_get_sync(dev);
 
-	ret = regulator_enable(gdsc_reg);
-	if (ret) {
-		pr_err("%s: unable to enable gdsc\n", __func__);
-		goto put_gdsc;
-	}
-
 	ret = clk_prepare_enable(ahb_clk);
 	if (ret) {
 		pr_err("%s: unable to enable ahb_clk\n", __func__);
-		goto disable_gdsc;
+		goto runtime_put;
 	}
 
 	ret = dsi_get_version(msm_host->ctrl_base, &major, &minor);
@@ -250,11 +237,8 @@ static const struct msm_dsi_cfg_handler *dsi_get_config(
 
 disable_clks:
 	clk_disable_unprepare(ahb_clk);
-disable_gdsc:
-	regulator_disable(gdsc_reg);
+runtime_put:
 	pm_runtime_put_sync(dev);
-put_gdsc:
-	regulator_put(gdsc_reg);
 exit:
 	return cfg_hnd;
 }