drm/msm/dsi: use devm_clk_*register to registe DSI PHY clocks

Use devres-enabled version of clock registration functions. This lets us
remove dsi_pll destroy callbacks completely.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <abhinavk@codeaurora.org>
Tested-by: Stephen Boyd <swboyd@chromium.org> # on sc7180 lazor
Link: https://lore.kernel.org/r/20210331105735.3690009-12-dmitry.baryshkov@linaro.org
Signed-off-by: Rob Clark <robdclark@chromium.org>

10 files changed, 71 insertions, 249 deletions

diff --git a/drivers/gpu/drm/msm/dsi/dsi.h b/drivers/gpu/drm/msm/dsi/dsi.h
index 43590f338d20..0970f05cd47f 100644
--- a/drivers/gpu/drm/msm/dsi/dsi.h
+++ b/drivers/gpu/drm/msm/dsi/dsi.h
@@ -95,13 +95,9 @@ struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi);
 /* dsi pll */
 struct msm_dsi_pll;
 #ifdef CONFIG_DRM_MSM_DSI_PLL
-void msm_dsi_pll_destroy(struct msm_dsi_pll *pll);
 void msm_dsi_pll_save_state(struct msm_dsi_pll *pll);
 int msm_dsi_pll_restore_state(struct msm_dsi_pll *pll);
 #else
-static inline void msm_dsi_pll_destroy(struct msm_dsi_pll *pll)
-{
-}
 static inline void msm_dsi_pll_save_state(struct msm_dsi_pll *pll)
 {
 }
diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
index 69214447f757..df3b91b0ea88 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
@@ -744,7 +744,6 @@ static int dsi_phy_driver_probe(struct platform_device *pdev)
 fail:
 	if (phy->pll) {
 		of_clk_del_provider(dev->of_node);
-		msm_dsi_pll_destroy(phy->pll);
 		phy->pll = NULL;
 	}
 
@@ -757,7 +756,6 @@ static int dsi_phy_driver_remove(struct platform_device *pdev)
 
 	if (phy && phy->pll) {
 		of_clk_del_provider(pdev->dev.of_node);
-		msm_dsi_pll_destroy(phy->pll);
 		phy->pll = NULL;
 	}
 
diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
index c3099629fa3b..2c5196844ba9 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
@@ -23,7 +23,6 @@ struct msm_dsi_phy_ops {
 struct msm_dsi_pll_ops {
 	int (*enable_seq)(struct msm_dsi_pll *pll);
 	void (*disable_seq)(struct msm_dsi_pll *pll);
-	void (*destroy)(struct msm_dsi_pll *pll);
 	void (*save_state)(struct msm_dsi_pll *pll);
 	int (*restore_state)(struct msm_dsi_pll *pll);
 };
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 8666da1c29e5..6300b92c65eb 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c
@@ -103,15 +103,6 @@ struct dsi_pll_10nm {
 	struct dsi_pll_config pll_configuration;
 	struct dsi_pll_regs reg_setup;
 
-	/* private clocks: */
-	struct clk_hw *out_div_clk_hw;
-	struct clk_hw *bit_clk_hw;
-	struct clk_hw *byte_clk_hw;
-	struct clk_hw *by_2_bit_clk_hw;
-	struct clk_hw *post_out_div_clk_hw;
-	struct clk_hw *pclk_mux_hw;
-	struct clk_hw *out_dsiclk_hw;
-
 	struct pll_10nm_cached_state cached_state;
 
 	enum msm_dsi_phy_usecase uc;
@@ -614,22 +605,6 @@ static int dsi_pll_10nm_set_usecase(struct msm_dsi_pll *pll,
 	return 0;
 }
 
-static void dsi_pll_10nm_destroy(struct msm_dsi_pll *pll)
-{
-	struct dsi_pll_10nm *pll_10nm = to_pll_10nm(pll);
-
-	DBG("DSI PLL%d", pll_10nm->id);
-
-	clk_hw_unregister_divider(pll_10nm->out_dsiclk_hw);
-	clk_hw_unregister_mux(pll_10nm->pclk_mux_hw);
-	clk_hw_unregister_fixed_factor(pll_10nm->post_out_div_clk_hw);
-	clk_hw_unregister_fixed_factor(pll_10nm->by_2_bit_clk_hw);
-	clk_hw_unregister_fixed_factor(pll_10nm->byte_clk_hw);
-	clk_hw_unregister_divider(pll_10nm->bit_clk_hw);
-	clk_hw_unregister_divider(pll_10nm->out_div_clk_hw);
-	clk_hw_unregister(&pll_10nm->base.clk_hw);
-}
-
 /*
  * The post dividers and mux clocks are created using the standard divider and
  * mux API. Unlike the 14nm PHY, the slave PLL doesn't need its dividers/mux
@@ -656,30 +631,28 @@ static int pll_10nm_register(struct dsi_pll_10nm *pll_10nm, struct clk_hw **prov
 	snprintf(vco_name, 32, "dsi%dvco_clk", pll_10nm->id);
 	pll_10nm->base.clk_hw.init = &vco_init;
 
-	ret = clk_hw_register(dev, &pll_10nm->base.clk_hw);
+	ret = devm_clk_hw_register(dev, &pll_10nm->base.clk_hw);
 	if (ret)
 		return ret;
 
 	snprintf(clk_name, 32, "dsi%d_pll_out_div_clk", pll_10nm->id);
 	snprintf(parent, 32, "dsi%dvco_clk", pll_10nm->id);
 
-	hw = clk_hw_register_divider(dev, clk_name,
+	hw = devm_clk_hw_register_divider(dev, clk_name,
 				     parent, CLK_SET_RATE_PARENT,
 				     pll_10nm->mmio +
 				     REG_DSI_10nm_PHY_PLL_PLL_OUTDIV_RATE,
 				     0, 2, CLK_DIVIDER_POWER_OF_TWO, NULL);
 	if (IS_ERR(hw)) {
 		ret = PTR_ERR(hw);
-		goto err_base_clk_hw;
+		goto fail;
 	}
 
-	pll_10nm->out_div_clk_hw = hw;
-
 	snprintf(clk_name, 32, "dsi%d_pll_bit_clk", pll_10nm->id);
 	snprintf(parent, 32, "dsi%d_pll_out_div_clk", pll_10nm->id);
 
 	/* BIT CLK: DIV_CTRL_3_0 */
-	hw = clk_hw_register_divider(dev, clk_name, parent,
+	hw = devm_clk_hw_register_divider(dev, clk_name, parent,
 				     CLK_SET_RATE_PARENT,
 				     pll_10nm->phy_cmn_mmio +
 				     REG_DSI_10nm_PHY_CMN_CLK_CFG0,
@@ -687,56 +660,49 @@ static int pll_10nm_register(struct dsi_pll_10nm *pll_10nm, struct clk_hw **prov
 				     &pll_10nm->postdiv_lock);
 	if (IS_ERR(hw)) {
 		ret = PTR_ERR(hw);
-		goto err_out_div_clk_hw;
+		goto fail;
 	}
 
-	pll_10nm->bit_clk_hw = hw;
-
 	snprintf(clk_name, 32, "dsi%d_phy_pll_out_byteclk", pll_10nm->id);
 	snprintf(parent, 32, "dsi%d_pll_bit_clk", pll_10nm->id);
 
 	/* DSI Byte clock = VCO_CLK / OUT_DIV / BIT_DIV / 8 */
-	hw = clk_hw_register_fixed_factor(dev, clk_name, parent,
+	hw = devm_clk_hw_register_fixed_factor(dev, clk_name, parent,
 					  CLK_SET_RATE_PARENT, 1, 8);
 	if (IS_ERR(hw)) {
 		ret = PTR_ERR(hw);
-		goto err_bit_clk_hw;
+		goto fail;
 	}
 
-	pll_10nm->byte_clk_hw = hw;
 	provided_clocks[DSI_BYTE_PLL_CLK] = hw;
 
 	snprintf(clk_name, 32, "dsi%d_pll_by_2_bit_clk", pll_10nm->id);
 	snprintf(parent, 32, "dsi%d_pll_bit_clk", pll_10nm->id);
 
-	hw = clk_hw_register_fixed_factor(dev, clk_name, parent,
+	hw = devm_clk_hw_register_fixed_factor(dev, clk_name, parent,
 					  0, 1, 2);
 	if (IS_ERR(hw)) {
 		ret = PTR_ERR(hw);
-		goto err_byte_clk_hw;
+		goto fail;
 	}
 
-	pll_10nm->by_2_bit_clk_hw = hw;
-
 	snprintf(clk_name, 32, "dsi%d_pll_post_out_div_clk", pll_10nm->id);
 	snprintf(parent, 32, "dsi%d_pll_out_div_clk", pll_10nm->id);
 
-	hw = clk_hw_register_fixed_factor(dev, clk_name, parent,
+	hw = devm_clk_hw_register_fixed_factor(dev, clk_name, parent,
 					  0, 1, 4);
 	if (IS_ERR(hw)) {
 		ret = PTR_ERR(hw);
-		goto err_by_2_bit_clk_hw;
+		goto fail;
 	}
 
-	pll_10nm->post_out_div_clk_hw = hw;
-
 	snprintf(clk_name, 32, "dsi%d_pclk_mux", pll_10nm->id);
 	snprintf(parent, 32, "dsi%d_pll_bit_clk", pll_10nm->id);
 	snprintf(parent2, 32, "dsi%d_pll_by_2_bit_clk", pll_10nm->id);
 	snprintf(parent3, 32, "dsi%d_pll_out_div_clk", pll_10nm->id);
 	snprintf(parent4, 32, "dsi%d_pll_post_out_div_clk", pll_10nm->id);
 
-	hw = clk_hw_register_mux(dev, clk_name,
+	hw = devm_clk_hw_register_mux(dev, clk_name,
 				 ((const char *[]){
 				 parent, parent2, parent3, parent4
 				 }), 4, 0, pll_10nm->phy_cmn_mmio +
@@ -744,44 +710,28 @@ static int pll_10nm_register(struct dsi_pll_10nm *pll_10nm, struct clk_hw **prov
 				 0, 2, 0, NULL);
 	if (IS_ERR(hw)) {
 		ret = PTR_ERR(hw);
-		goto err_post_out_div_clk_hw;
+		goto fail;
 	}
 
-	pll_10nm->pclk_mux_hw = hw;
-
 	snprintf(clk_name, 32, "dsi%d_phy_pll_out_dsiclk", pll_10nm->id);
 	snprintf(parent, 32, "dsi%d_pclk_mux", pll_10nm->id);
 
 	/* PIX CLK DIV : DIV_CTRL_7_4*/
-	hw = clk_hw_register_divider(dev, clk_name, parent,
+	hw = devm_clk_hw_register_divider(dev, clk_name, parent,
 				     0, pll_10nm->phy_cmn_mmio +
 					REG_DSI_10nm_PHY_CMN_CLK_CFG0,
 				     4, 4, CLK_DIVIDER_ONE_BASED,
 				     &pll_10nm->postdiv_lock);
 	if (IS_ERR(hw)) {
 		ret = PTR_ERR(hw);
-		goto err_pclk_mux_hw;
+		goto fail;
 	}
 
-	pll_10nm->out_dsiclk_hw = hw;
 	provided_clocks[DSI_PIXEL_PLL_CLK] = hw;
 
 	return 0;
 
-err_pclk_mux_hw:
-	clk_hw_unregister_mux(pll_10nm->pclk_mux_hw);
-err_post_out_div_clk_hw:
-	clk_hw_unregister_fixed_factor(pll_10nm->post_out_div_clk_hw);
-err_by_2_bit_clk_hw:
-	clk_hw_unregister_fixed_factor(pll_10nm->by_2_bit_clk_hw);
-err_byte_clk_hw:
-	clk_hw_unregister_fixed_factor(pll_10nm->byte_clk_hw);
-err_bit_clk_hw:
-	clk_hw_unregister_divider(pll_10nm->bit_clk_hw);
-err_out_div_clk_hw:
-	clk_hw_unregister_divider(pll_10nm->out_div_clk_hw);
-err_base_clk_hw:
-	clk_hw_unregister(&pll_10nm->base.clk_hw);
+fail:
 
 	return ret;
 }
@@ -1060,7 +1010,6 @@ const struct msm_dsi_phy_cfg dsi_phy_10nm_cfgs = {
 		.pll_init = dsi_pll_10nm_init,
 	},
 	.pll_ops = {
-		.destroy = dsi_pll_10nm_destroy,
 		.save_state = dsi_pll_10nm_save_state,
 		.restore_state = dsi_pll_10nm_restore_state,
 	},
@@ -1085,7 +1034,6 @@ const struct msm_dsi_phy_cfg dsi_phy_10nm_8998_cfgs = {
 		.pll_init = dsi_pll_10nm_init,
 	},
 	.pll_ops = {
-		.destroy = dsi_pll_10nm_destroy,
 		.save_state = dsi_pll_10nm_save_state,
 		.restore_state = dsi_pll_10nm_restore_state,
 	},
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 07ecdf34f614..7fe7c8348b42 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_14nm.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_14nm.c
@@ -133,10 +133,6 @@ struct dsi_pll_14nm {
 	u64 vco_current_rate;
 	u64 vco_ref_clk_rate;
 
-	/* private clocks: */
-	struct clk_hw *hws[NUM_DSI_CLOCKS_MAX];
-	u32 num_hws;
-
 	struct pll_14nm_cached_state cached_state;
 
 	enum msm_dsi_phy_usecase uc;
@@ -872,15 +868,6 @@ static int dsi_pll_14nm_set_usecase(struct msm_dsi_pll *pll,
 	return 0;
 }
 
-static void dsi_pll_14nm_destroy(struct msm_dsi_pll *pll)
-{
-	struct dsi_pll_14nm *pll_14nm = to_pll_14nm(pll);
-	int num_hws = pll_14nm->num_hws;
-
-	while (num_hws--)
-		clk_hw_unregister(pll_14nm->hws[num_hws]);
-}
-
 static struct clk_hw *pll_14nm_postdiv_register(struct dsi_pll_14nm *pll_14nm,
 						const char *name,
 						const char *parent_name,
@@ -910,7 +897,7 @@ static struct clk_hw *pll_14nm_postdiv_register(struct dsi_pll_14nm *pll_14nm,
 	pll_postdiv->flags = CLK_DIVIDER_ONE_BASED;
 	pll_postdiv->hw.init = &postdiv_init;
 
-	ret = clk_hw_register(dev, &pll_postdiv->hw);
+	ret = devm_clk_hw_register(dev, &pll_postdiv->hw);
 	if (ret)
 		return ERR_PTR(ret);
 
@@ -928,9 +915,7 @@ static int pll_14nm_register(struct dsi_pll_14nm *pll_14nm, struct clk_hw **prov
 		.ops = &clk_ops_dsi_pll_14nm_vco,
 	};
 	struct device *dev = &pll_14nm->pdev->dev;
-	struct clk_hw **hws = pll_14nm->hws;
 	struct clk_hw *hw;
-	int num = 0;
 	int ret;
 
 	DBG("DSI%d", pll_14nm->id);
@@ -938,12 +923,10 @@ static int pll_14nm_register(struct dsi_pll_14nm *pll_14nm, struct clk_hw **prov
 	snprintf(vco_name, 32, "dsi%dvco_clk", pll_14nm->id);
 	pll_14nm->base.clk_hw.init = &vco_init;
 
-	ret = clk_hw_register(dev, &pll_14nm->base.clk_hw);
+	ret = devm_clk_hw_register(dev, &pll_14nm->base.clk_hw);
 	if (ret)
 		return ret;
 
-	hws[num++] = &pll_14nm->base.clk_hw;
-
 	snprintf(clk_name, 32, "dsi%dn1_postdiv_clk", pll_14nm->id);
 	snprintf(parent, 32, "dsi%dvco_clk", pll_14nm->id);
 
@@ -953,18 +936,15 @@ static int pll_14nm_register(struct dsi_pll_14nm *pll_14nm, struct clk_hw **prov
 	if (IS_ERR(hw))
 		return PTR_ERR(hw);
 
-	hws[num++] = hw;
-
 	snprintf(clk_name, 32, "dsi%dpllbyte", pll_14nm->id);
 	snprintf(parent, 32, "dsi%dn1_postdiv_clk", pll_14nm->id);
 
 	/* DSI Byte clock = VCO_CLK / N1 / 8 */
-	hw = clk_hw_register_fixed_factor(dev, clk_name, parent,
+	hw = devm_clk_hw_register_fixed_factor(dev, clk_name, parent,
 					  CLK_SET_RATE_PARENT, 1, 8);
 	if (IS_ERR(hw))
 		return PTR_ERR(hw);
 
-	hws[num++] = hw;
 	provided_clocks[DSI_BYTE_PLL_CLK] = hw;
 
 	snprintf(clk_name, 32, "dsi%dn1_postdivby2_clk", pll_14nm->id);
@@ -974,12 +954,10 @@ static int pll_14nm_register(struct dsi_pll_14nm *pll_14nm, struct clk_hw **prov
 	 * Skip the mux for now, force DSICLK_SEL to 1, Add a /2 divider
 	 * on the way. Don't let it set parent.
 	 */
-	hw = clk_hw_register_fixed_factor(dev, clk_name, parent, 0, 1, 2);
+	hw = devm_clk_hw_register_fixed_factor(dev, clk_name, parent, 0, 1, 2);
 	if (IS_ERR(hw))
 		return PTR_ERR(hw);
 
-	hws[num++] = hw;
-
 	snprintf(clk_name, 32, "dsi%dpll", pll_14nm->id);
 	snprintf(parent, 32, "dsi%dn1_postdivby2_clk", pll_14nm->id);
 
@@ -991,11 +969,8 @@ static int pll_14nm_register(struct dsi_pll_14nm *pll_14nm, struct clk_hw **prov
 	if (IS_ERR(hw))
 		return PTR_ERR(hw);
 
-	hws[num++] = hw;
 	provided_clocks[DSI_PIXEL_PLL_CLK]	= hw;
 
-	pll_14nm->num_hws = num;
-
 	return 0;
 }
 
@@ -1184,7 +1159,6 @@ const struct msm_dsi_phy_cfg dsi_phy_14nm_cfgs = {
 		.pll_init = dsi_pll_14nm_init,
 	},
 	.pll_ops = {
-		.destroy = dsi_pll_14nm_destroy,
 		.save_state = dsi_pll_14nm_save_state,
 		.restore_state = dsi_pll_14nm_restore_state,
 		.disable_seq = dsi_pll_14nm_disable_seq,
@@ -1211,7 +1185,6 @@ const struct msm_dsi_phy_cfg dsi_phy_14nm_660_cfgs = {
 		.pll_init = dsi_pll_14nm_init,
 	},
 	.pll_ops = {
-		.destroy = dsi_pll_14nm_destroy,
 		.save_state = dsi_pll_14nm_save_state,
 		.restore_state = dsi_pll_14nm_restore_state,
 		.disable_seq = dsi_pll_14nm_disable_seq,
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 3446be318648..3e9b7949b038 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_28nm.c
@@ -74,10 +74,6 @@ struct dsi_pll_28nm {
 
 	int vco_delay;
 
-	/* private clocks: */
-	struct clk *clks[NUM_DSI_CLOCKS_MAX];
-	u32 num_clks;
-
 	struct pll_28nm_cached_state cached_state;
 };
 
@@ -486,15 +482,6 @@ static int dsi_pll_28nm_restore_state(struct msm_dsi_pll *pll)
 	return 0;
 }
 
-static void dsi_pll_28nm_destroy(struct msm_dsi_pll *pll)
-{
-	struct dsi_pll_28nm *pll_28nm = to_pll_28nm(pll);
-
-	msm_dsi_pll_helper_unregister_clks(pll_28nm->clks, pll_28nm->num_clks);
-
-	pll_28nm->num_clks = 0;
-}
-
 static int pll_28nm_register(struct dsi_pll_28nm *pll_28nm, struct clk_hw **provided_clocks)
 {
 	char clk_name[32], parent1[32], parent2[32], vco_name[32];
@@ -506,53 +493,63 @@ static int pll_28nm_register(struct dsi_pll_28nm *pll_28nm, struct clk_hw **prov
 		.ops = &clk_ops_dsi_pll_28nm_vco,
 	};
 	struct device *dev = &pll_28nm->pdev->dev;
-	struct clk **clks = pll_28nm->clks;
-	int num = 0;
+	struct clk_hw *hw;
+	int ret;
 
 	DBG("%d", pll_28nm->id);
 
 	snprintf(vco_name, 32, "dsi%dvco_clk", pll_28nm->id);
 	pll_28nm->base.clk_hw.init = &vco_init;
-	clks[num++] = clk_register(dev, &pll_28nm->base.clk_hw);
+	ret = devm_clk_hw_register(dev, &pll_28nm->base.clk_hw);
+	if (ret)
+		return ret;
 
 	snprintf(clk_name, 32, "dsi%danalog_postdiv_clk", pll_28nm->id);
 	snprintf(parent1, 32, "dsi%dvco_clk", pll_28nm->id);
-	clks[num++] = clk_register_divider(dev, clk_name,
+	hw = devm_clk_hw_register_divider(dev, clk_name,
 			parent1, CLK_SET_RATE_PARENT,
 			pll_28nm->mmio +
 			REG_DSI_28nm_PHY_PLL_POSTDIV1_CFG,
 			0, 4, 0, NULL);
+	if (IS_ERR(hw))
+		return PTR_ERR(hw);
 
 	snprintf(clk_name, 32, "dsi%dindirect_path_div2_clk", pll_28nm->id);
 	snprintf(parent1, 32, "dsi%danalog_postdiv_clk", pll_28nm->id);
-	clks[num++] = clk_register_fixed_factor(dev, clk_name,
+	hw = devm_clk_hw_register_fixed_factor(dev, clk_name,
 			parent1, CLK_SET_RATE_PARENT,
 			1, 2);
+	if (IS_ERR(hw))
+		return PTR_ERR(hw);
 
 	snprintf(clk_name, 32, "dsi%dpll", pll_28nm->id);
 	snprintf(parent1, 32, "dsi%dvco_clk", pll_28nm->id);
-	clks[num++] = clk_register_divider(dev, clk_name,
+	hw = devm_clk_hw_register_divider(dev, clk_name,
 				parent1, 0, pll_28nm->mmio +
 				REG_DSI_28nm_PHY_PLL_POSTDIV3_CFG,
 				0, 8, 0, NULL);
-	provided_clocks[DSI_PIXEL_PLL_CLK] = __clk_get_hw(clks[num - 1]);
+	if (IS_ERR(hw))
+		return PTR_ERR(hw);
+	provided_clocks[DSI_PIXEL_PLL_CLK] = hw;
 
 	snprintf(clk_name, 32, "dsi%dbyte_mux", pll_28nm->id);
 	snprintf(parent1, 32, "dsi%dvco_clk", pll_28nm->id);
 	snprintf(parent2, 32, "dsi%dindirect_path_div2_clk", pll_28nm->id);
-	clks[num++] = clk_register_mux(dev, clk_name,
+	hw = devm_clk_hw_register_mux(dev, clk_name,
 			((const char *[]){
 				parent1, parent2
 			}), 2, CLK_SET_RATE_PARENT, pll_28nm->mmio +
 			REG_DSI_28nm_PHY_PLL_VREG_CFG, 1, 1, 0, NULL);
+	if (IS_ERR(hw))
+		return PTR_ERR(hw);
 
 	snprintf(clk_name, 32, "dsi%dpllbyte", pll_28nm->id);
 	snprintf(parent1, 32, "dsi%dbyte_mux", pll_28nm->id);
-	clks[num++] = clk_register_fixed_factor(dev, clk_name,
+	hw = devm_clk_hw_register_fixed_factor(dev, clk_name,
 				parent1, CLK_SET_RATE_PARENT, 1, 4);
-	provided_clocks[DSI_BYTE_PLL_CLK] = __clk_get_hw(clks[num - 1]);
-
-	pll_28nm->num_clks = num;
+	if (IS_ERR(hw))
+		return PTR_ERR(hw);
+	provided_clocks[DSI_BYTE_PLL_CLK] = hw;
 
 	return 0;
 }
@@ -758,7 +755,6 @@ const struct msm_dsi_phy_cfg dsi_phy_28nm_hpm_cfgs = {
 		.pll_init = dsi_pll_28nm_init,
 	},
 	.pll_ops = {
-		.destroy = dsi_pll_28nm_destroy,
 		.save_state = dsi_pll_28nm_save_state,
 		.restore_state = dsi_pll_28nm_restore_state,
 		.disable_seq = dsi_pll_28nm_disable_seq,
@@ -785,7 +781,6 @@ const struct msm_dsi_phy_cfg dsi_phy_28nm_hpm_famb_cfgs = {
 		.pll_init = dsi_pll_28nm_init,
 	},
 	.pll_ops = {
-		.destroy = dsi_pll_28nm_destroy,
 		.save_state = dsi_pll_28nm_save_state,
 		.restore_state = dsi_pll_28nm_restore_state,
 		.disable_seq = dsi_pll_28nm_disable_seq,
@@ -812,7 +807,6 @@ const struct msm_dsi_phy_cfg dsi_phy_28nm_lp_cfgs = {
 		.pll_init = dsi_pll_28nm_init,
 	},
 	.pll_ops = {
-		.destroy = dsi_pll_28nm_destroy,
 		.save_state = dsi_pll_28nm_save_state,
 		.restore_state = dsi_pll_28nm_restore_state,
 		.disable_seq = dsi_pll_28nm_disable_seq,
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 c4b433790cfb..45b2bf482392 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
@@ -64,13 +64,6 @@ struct dsi_pll_28nm {
 	struct platform_device *pdev;
 	void __iomem *mmio;
 
-	/* custom byte clock divider */
-	struct clk_bytediv *bytediv;
-
-	/* private clocks: */
-	struct clk *clks[NUM_DSI_CLOCKS_MAX];
-	u32 num_clks;
-
 	struct pll_28nm_cached_state cached_state;
 };
 
@@ -368,13 +361,6 @@ static int dsi_pll_28nm_restore_state(struct msm_dsi_pll *pll)
 	return 0;
 }
 
-static void dsi_pll_28nm_destroy(struct msm_dsi_pll *pll)
-{
-	struct dsi_pll_28nm *pll_28nm = to_pll_28nm(pll);
-
-	msm_dsi_pll_helper_unregister_clks(pll_28nm->clks, pll_28nm->num_clks);
-}
-
 static int pll_28nm_register(struct dsi_pll_28nm *pll_28nm, struct clk_hw **provided_clocks)
 {
 	char *clk_name, *parent_name, *vco_name;
@@ -385,10 +371,10 @@ static int pll_28nm_register(struct dsi_pll_28nm *pll_28nm, struct clk_hw **prov
 		.ops = &clk_ops_dsi_pll_28nm_vco,
 	};
 	struct device *dev = &pll_28nm->pdev->dev;
-	struct clk **clks = pll_28nm->clks;
+	struct clk_hw *hw;
 	struct clk_bytediv *bytediv;
 	struct clk_init_data bytediv_init = { };
-	int num = 0;
+	int ret;
 
 	DBG("%d", pll_28nm->id);
 
@@ -404,14 +390,14 @@ static int pll_28nm_register(struct dsi_pll_28nm *pll_28nm, struct clk_hw **prov
 	if (!clk_name)
 		return -ENOMEM;
 
-	pll_28nm->bytediv = bytediv;
-
 	snprintf(vco_name, 32, "dsi%dvco_clk", pll_28nm->id);
 	vco_init.name = vco_name;
 
 	pll_28nm->base.clk_hw.init = &vco_init;
 
-	clks[num++] = clk_register(dev, &pll_28nm->base.clk_hw);
+	ret = devm_clk_hw_register(dev, &pll_28nm->base.clk_hw);
+	if (ret)
+		return ret;
 
 	/* prepare and register bytediv */
 	bytediv->hw.init = &bytediv_init;
@@ -427,18 +413,20 @@ static int pll_28nm_register(struct dsi_pll_28nm *pll_28nm, struct clk_hw **prov
 	bytediv_init.num_parents = 1;
 
 	/* DIV2 */
-	clks[num++] = clk_register(dev, &bytediv->hw);
-	provided_clocks[DSI_BYTE_PLL_CLK] = __clk_get_hw(clks[num - 1]);
+	ret = devm_clk_hw_register(dev, &bytediv->hw);
+	if (ret)
+		return ret;
+	provided_clocks[DSI_BYTE_PLL_CLK] = &bytediv->hw;
 
 	snprintf(clk_name, 32, "dsi%dpll", pll_28nm->id);
 	/* DIV3 */
-	clks[num++] = clk_register_divider(dev, clk_name,
+	hw = devm_clk_hw_register_divider(dev, clk_name,
 				parent_name, 0, pll_28nm->mmio +
 				REG_DSI_28nm_8960_PHY_PLL_CTRL_10,
 				0, 8, 0, NULL);
-	provided_clocks[DSI_PIXEL_PLL_CLK] = __clk_get_hw(clks[num - 1]);
-
-	pll_28nm->num_clks = num;
+	if (IS_ERR(hw))
+		return PTR_ERR(hw);
+	provided_clocks[DSI_PIXEL_PLL_CLK] = hw;
 
 	return 0;
 }
@@ -662,7 +650,6 @@ const struct msm_dsi_phy_cfg dsi_phy_28nm_8960_cfgs = {
 		.pll_init = dsi_pll_28nm_8960_init,
 	},
 	.pll_ops = {
-		.destroy = dsi_pll_28nm_destroy,
 		.save_state = dsi_pll_28nm_save_state,
 		.restore_state = dsi_pll_28nm_restore_state,
 		.disable_seq = dsi_pll_28nm_disable_seq,
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 0b601afa9e49..c482e51d1bee 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
@@ -103,15 +103,6 @@ struct dsi_pll_7nm {
 	struct dsi_pll_config pll_configuration;
 	struct dsi_pll_regs reg_setup;
 
-	/* private clocks: */
-	struct clk_hw *out_div_clk_hw;
-	struct clk_hw *bit_clk_hw;
-	struct clk_hw *byte_clk_hw;
-	struct clk_hw *by_2_bit_clk_hw;
-	struct clk_hw *post_out_div_clk_hw;
-	struct clk_hw *pclk_mux_hw;
-	struct clk_hw *out_dsiclk_hw;
-
 	struct pll_7nm_cached_state cached_state;
 
 	enum msm_dsi_phy_usecase uc;
@@ -639,22 +630,6 @@ static int dsi_pll_7nm_set_usecase(struct msm_dsi_pll *pll,
 	return 0;
 }
 
-static void dsi_pll_7nm_destroy(struct msm_dsi_pll *pll)
-{
-	struct dsi_pll_7nm *pll_7nm = to_pll_7nm(pll);
-
-	DBG("DSI PLL%d", pll_7nm->id);
-
-	clk_hw_unregister_divider(pll_7nm->out_dsiclk_hw);
-	clk_hw_unregister_mux(pll_7nm->pclk_mux_hw);
-	clk_hw_unregister_fixed_factor(pll_7nm->post_out_div_clk_hw);
-	clk_hw_unregister_fixed_factor(pll_7nm->by_2_bit_clk_hw);
-	clk_hw_unregister_fixed_factor(pll_7nm->byte_clk_hw);
-	clk_hw_unregister_divider(pll_7nm->bit_clk_hw);
-	clk_hw_unregister_divider(pll_7nm->out_div_clk_hw);
-	clk_hw_unregister(&pll_7nm->base.clk_hw);
-}
-
 /*
  * The post dividers and mux clocks are created using the standard divider and
  * mux API. Unlike the 14nm PHY, the slave PLL doesn't need its dividers/mux
@@ -681,30 +656,28 @@ static int pll_7nm_register(struct dsi_pll_7nm *pll_7nm, struct clk_hw **provide
 	snprintf(vco_name, 32, "dsi%dvco_clk", pll_7nm->id);
 	pll_7nm->base.clk_hw.init = &vco_init;
 
-	ret = clk_hw_register(dev, &pll_7nm->base.clk_hw);
+	ret = devm_clk_hw_register(dev, &pll_7nm->base.clk_hw);
 	if (ret)
 		return ret;
 
 	snprintf(clk_name, 32, "dsi%d_pll_out_div_clk", pll_7nm->id);
 	snprintf(parent, 32, "dsi%dvco_clk", pll_7nm->id);
 
-	hw = clk_hw_register_divider(dev, clk_name,
+	hw = devm_clk_hw_register_divider(dev, clk_name,
 				     parent, CLK_SET_RATE_PARENT,
 				     pll_7nm->mmio +
 				     REG_DSI_7nm_PHY_PLL_PLL_OUTDIV_RATE,
 				     0, 2, CLK_DIVIDER_POWER_OF_TWO, NULL);
 	if (IS_ERR(hw)) {
 		ret = PTR_ERR(hw);
-		goto err_base_clk_hw;
+		goto fail;
 	}
 
-	pll_7nm->out_div_clk_hw = hw;
-
 	snprintf(clk_name, 32, "dsi%d_pll_bit_clk", pll_7nm->id);
 	snprintf(parent, 32, "dsi%d_pll_out_div_clk", pll_7nm->id);
 
 	/* BIT CLK: DIV_CTRL_3_0 */
-	hw = clk_hw_register_divider(dev, clk_name, parent,
+	hw = devm_clk_hw_register_divider(dev, clk_name, parent,
 				     CLK_SET_RATE_PARENT,
 				     pll_7nm->phy_cmn_mmio +
 				     REG_DSI_7nm_PHY_CMN_CLK_CFG0,
@@ -712,56 +685,49 @@ static int pll_7nm_register(struct dsi_pll_7nm *pll_7nm, struct clk_hw **provide
 				     &pll_7nm->postdiv_lock);
 	if (IS_ERR(hw)) {
 		ret = PTR_ERR(hw);
-		goto err_out_div_clk_hw;
+		goto fail;
 	}
 
-	pll_7nm->bit_clk_hw = hw;
-
 	snprintf(clk_name, 32, "dsi%d_phy_pll_out_byteclk", pll_7nm->id);
 	snprintf(parent, 32, "dsi%d_pll_bit_clk", pll_7nm->id);
 
 	/* DSI Byte clock = VCO_CLK / OUT_DIV / BIT_DIV / 8 */
-	hw = clk_hw_register_fixed_factor(dev, clk_name, parent,
+	hw = devm_clk_hw_register_fixed_factor(dev, clk_name, parent,
 					  CLK_SET_RATE_PARENT, 1, 8);
 	if (IS_ERR(hw)) {
 		ret = PTR_ERR(hw);
-		goto err_bit_clk_hw;
+		goto fail;
 	}
 
-	pll_7nm->byte_clk_hw = hw;
 	provided_clocks[DSI_BYTE_PLL_CLK] = hw;
 
 	snprintf(clk_name, 32, "dsi%d_pll_by_2_bit_clk", pll_7nm->id);
 	snprintf(parent, 32, "dsi%d_pll_bit_clk", pll_7nm->id);
 
-	hw = clk_hw_register_fixed_factor(dev, clk_name, parent,
+	hw = devm_clk_hw_register_fixed_factor(dev, clk_name, parent,
 					  0, 1, 2);
 	if (IS_ERR(hw)) {
 		ret = PTR_ERR(hw);
-		goto err_byte_clk_hw;
+		goto fail;
 	}
 
-	pll_7nm->by_2_bit_clk_hw = hw;
-
 	snprintf(clk_name, 32, "dsi%d_pll_post_out_div_clk", pll_7nm->id);
 	snprintf(parent, 32, "dsi%d_pll_out_div_clk", pll_7nm->id);
 
-	hw = clk_hw_register_fixed_factor(dev, clk_name, parent,
+	hw = devm_clk_hw_register_fixed_factor(dev, clk_name, parent,
 					  0, 1, 4);
 	if (IS_ERR(hw)) {
 		ret = PTR_ERR(hw);
-		goto err_by_2_bit_clk_hw;
+		goto fail;
 	}
 
-	pll_7nm->post_out_div_clk_hw = hw;
-
 	snprintf(clk_name, 32, "dsi%d_pclk_mux", pll_7nm->id);
 	snprintf(parent, 32, "dsi%d_pll_bit_clk", pll_7nm->id);
 	snprintf(parent2, 32, "dsi%d_pll_by_2_bit_clk", pll_7nm->id);
 	snprintf(parent3, 32, "dsi%d_pll_out_div_clk", pll_7nm->id);
 	snprintf(parent4, 32, "dsi%d_pll_post_out_div_clk", pll_7nm->id);
 
-	hw = clk_hw_register_mux(dev, clk_name,
+	hw = devm_clk_hw_register_mux(dev, clk_name,
 				 ((const char *[]){
 				 parent, parent2, parent3, parent4
 				 }), 4, 0, pll_7nm->phy_cmn_mmio +
@@ -769,44 +735,28 @@ static int pll_7nm_register(struct dsi_pll_7nm *pll_7nm, struct clk_hw **provide
 				 0, 2, 0, NULL);
 	if (IS_ERR(hw)) {
 		ret = PTR_ERR(hw);
-		goto err_post_out_div_clk_hw;
+		goto fail;
 	}
 
-	pll_7nm->pclk_mux_hw = hw;
-
 	snprintf(clk_name, 32, "dsi%d_phy_pll_out_dsiclk", pll_7nm->id);
 	snprintf(parent, 32, "dsi%d_pclk_mux", pll_7nm->id);
 
 	/* PIX CLK DIV : DIV_CTRL_7_4*/
-	hw = clk_hw_register_divider(dev, clk_name, parent,
+	hw = devm_clk_hw_register_divider(dev, clk_name, parent,
 				     0, pll_7nm->phy_cmn_mmio +
 					REG_DSI_7nm_PHY_CMN_CLK_CFG0,
 				     4, 4, CLK_DIVIDER_ONE_BASED,
 				     &pll_7nm->postdiv_lock);
 	if (IS_ERR(hw)) {
 		ret = PTR_ERR(hw);
-		goto err_pclk_mux_hw;
+		goto fail;
 	}
 
-	pll_7nm->out_dsiclk_hw = hw;
 	provided_clocks[DSI_PIXEL_PLL_CLK] = hw;
 
 	return 0;
 
-err_pclk_mux_hw:
-	clk_hw_unregister_mux(pll_7nm->pclk_mux_hw);
-err_post_out_div_clk_hw:
-	clk_hw_unregister_fixed_factor(pll_7nm->post_out_div_clk_hw);
-err_by_2_bit_clk_hw:
-	clk_hw_unregister_fixed_factor(pll_7nm->by_2_bit_clk_hw);
-err_byte_clk_hw:
-	clk_hw_unregister_fixed_factor(pll_7nm->byte_clk_hw);
-err_bit_clk_hw:
-	clk_hw_unregister_divider(pll_7nm->bit_clk_hw);
-err_out_div_clk_hw:
-	clk_hw_unregister_divider(pll_7nm->out_div_clk_hw);
-err_base_clk_hw:
-	clk_hw_unregister(&pll_7nm->base.clk_hw);
+fail:
 
 	return ret;
 }
@@ -1093,7 +1043,6 @@ const struct msm_dsi_phy_cfg dsi_phy_7nm_cfgs = {
 		.pll_init = dsi_pll_7nm_init,
 	},
 	.pll_ops = {
-		.destroy = dsi_pll_7nm_destroy,
 		.save_state = dsi_pll_7nm_save_state,
 		.restore_state = dsi_pll_7nm_restore_state,
 	},
@@ -1119,7 +1068,6 @@ const struct msm_dsi_phy_cfg dsi_phy_7nm_8150_cfgs = {
 		.pll_init = dsi_pll_7nm_init,
 	},
 	.pll_ops = {
-		.destroy = dsi_pll_7nm_destroy,
 		.save_state = dsi_pll_7nm_save_state,
 		.restore_state = dsi_pll_7nm_restore_state,
 	},
diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_pll.c b/drivers/gpu/drm/msm/dsi/phy/dsi_pll.c
index 914e95435dcb..96de79b94f1b 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_pll.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_pll.c
@@ -57,26 +57,9 @@ void msm_dsi_pll_helper_clk_unprepare(struct clk_hw *hw)
 	pll->pll_on = false;
 }
 
-void msm_dsi_pll_helper_unregister_clks(struct clk **clks, u32 num_clks)
-{
-	if (!num_clks || !clks)
-		return;
-
-	do {
-		clk_unregister(clks[--num_clks]);
-		clks[num_clks] = NULL;
-	} while (num_clks);
-}
-
 /*
  * DSI PLL API
  */
-void msm_dsi_pll_destroy(struct msm_dsi_pll *pll)
-{
-	if (pll->cfg->pll_ops.destroy)
-		pll->cfg->pll_ops.destroy(pll);
-}
-
 void msm_dsi_pll_save_state(struct msm_dsi_pll *pll)
 {
 	if (pll->cfg->pll_ops.save_state) {
diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_pll.h b/drivers/gpu/drm/msm/dsi/phy/dsi_pll.h
index d819a886beb8..c94f079b8275 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_pll.h
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_pll.h
@@ -11,8 +11,6 @@
 
 #include "dsi.h"
 
-#define NUM_DSI_CLOCKS_MAX	6
-
 struct msm_dsi_pll {
 	struct clk_hw	clk_hw;
 	bool		pll_on;
@@ -54,8 +52,6 @@ long msm_dsi_pll_helper_clk_round_rate(struct clk_hw *hw,
 		unsigned long rate, unsigned long *parent_rate);
 int msm_dsi_pll_helper_clk_prepare(struct clk_hw *hw);
 void msm_dsi_pll_helper_clk_unprepare(struct clk_hw *hw);
-/* misc */
-void msm_dsi_pll_helper_unregister_clks(struct clk **clks, u32 num_clks);
 
 #endif /* __DSI_PLL_H__ */