linux-kernel - [PATCH v2 2/7] drm/msm/dsi_phy_14nm: convert from round_rate() to determine

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Message-Id: <20250810-drm-msm-phy-clk-round-rate-v2-2-0fd1f7979c83@redhat.com>
Date: Sun, 10 Aug 2025 18:57:26 -0400
From: Brian Masney <bmasney@...hat.com>
To: Rob Clark <robin.clark@....qualcomm.com>, 
 Dmitry Baryshkov <lumag@...nel.org>, 
 Abhinav Kumar <abhinav.kumar@...ux.dev>, 
 Jessica Zhang <jessica.zhang@....qualcomm.com>, Sean Paul <sean@...rly.run>, 
 Marijn Suijten <marijn.suijten@...ainline.org>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Maxime Ripard <mripard@...nel.org>, Stephen Boyd <sboyd@...nel.org>
Cc: linux-clk@...r.kernel.org, linux-arm-msm@...r.kernel.org, 
 dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org, 
 linux-kernel@...r.kernel.org, Brian Masney <bmasney@...hat.com>
Subject: [PATCH v2 2/7] drm/msm/dsi_phy_14nm: convert from round_rate() to
 determine_rate()

The round_rate() clk ops is deprecated, so migrate this driver from
round_rate() to determine_rate() using the Coccinelle semantic patch
on the cover letter of this series. The change to use clamp_t() was
done manually.

Signed-off-by: Brian Masney <bmasney@...hat.com>
---
 drivers/gpu/drm/msm/dsi/phy/dsi_phy_14nm.c | 34 +++++++++++++++---------------
 1 file changed, 17 insertions(+), 17 deletions(-)

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 3a1c8ece6657c988cfb0c26af39b5d145bc576f8..fdefcbd9c2848a1c76414a41b811b29e5fed9ddc 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_14nm.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_14nm.c
@@ -578,21 +578,19 @@ static void dsi_pll_14nm_vco_unprepare(struct clk_hw *hw)
 	pll_14nm->phy->pll_on = false;
 }
 
-static long dsi_pll_14nm_clk_round_rate(struct clk_hw *hw,
-		unsigned long rate, unsigned long *parent_rate)
+static int dsi_pll_14nm_clk_determine_rate(struct clk_hw *hw,
+					   struct clk_rate_request *req)
 {
 	struct dsi_pll_14nm *pll_14nm = to_pll_14nm(hw);
 
-	if      (rate < pll_14nm->phy->cfg->min_pll_rate)
-		return  pll_14nm->phy->cfg->min_pll_rate;
-	else if (rate > pll_14nm->phy->cfg->max_pll_rate)
-		return  pll_14nm->phy->cfg->max_pll_rate;
-	else
-		return rate;
+	req->rate = clamp_t(unsigned long, req->rate,
+			    pll_14nm->phy->cfg->min_pll_rate, pll_14nm->phy->cfg->max_pll_rate);
+
+	return 0;
 }
 
 static const struct clk_ops clk_ops_dsi_pll_14nm_vco = {
-	.round_rate = dsi_pll_14nm_clk_round_rate,
+	.determine_rate = dsi_pll_14nm_clk_determine_rate,
 	.set_rate = dsi_pll_14nm_vco_set_rate,
 	.recalc_rate = dsi_pll_14nm_vco_recalc_rate,
 	.prepare = dsi_pll_14nm_vco_prepare,
@@ -622,18 +620,20 @@ static unsigned long dsi_pll_14nm_postdiv_recalc_rate(struct clk_hw *hw,
 				   postdiv->flags, width);
 }
 
-static long dsi_pll_14nm_postdiv_round_rate(struct clk_hw *hw,
-					    unsigned long rate,
-					    unsigned long *prate)
+static int dsi_pll_14nm_postdiv_determine_rate(struct clk_hw *hw,
+					       struct clk_rate_request *req)
 {
 	struct dsi_pll_14nm_postdiv *postdiv = to_pll_14nm_postdiv(hw);
 	struct dsi_pll_14nm *pll_14nm = postdiv->pll;
 
-	DBG("DSI%d PLL parent rate=%lu", pll_14nm->phy->id, rate);
+	DBG("DSI%d PLL parent rate=%lu", pll_14nm->phy->id, req->rate);
 
-	return divider_round_rate(hw, rate, prate, NULL,
-				  postdiv->width,
-				  postdiv->flags);
+	req->rate = divider_round_rate(hw, req->rate, &req->best_parent_rate,
+				       NULL,
+				       postdiv->width,
+				       postdiv->flags);
+
+	return 0;
 }
 
 static int dsi_pll_14nm_postdiv_set_rate(struct clk_hw *hw, unsigned long rate,
@@ -680,7 +680,7 @@ static int dsi_pll_14nm_postdiv_set_rate(struct clk_hw *hw, unsigned long rate,
 
 static const struct clk_ops clk_ops_dsi_pll_14nm_postdiv = {
 	.recalc_rate = dsi_pll_14nm_postdiv_recalc_rate,
-	.round_rate = dsi_pll_14nm_postdiv_round_rate,
+	.determine_rate = dsi_pll_14nm_postdiv_determine_rate,
 	.set_rate = dsi_pll_14nm_postdiv_set_rate,
 };
 

-- 
2.50.1