linux-kernel - [PATCH RFC 1/5] drm/msm: dpu1: create a dpu_hw_clk_force

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Message-Id: <20231009-topic-sm8550-graphics-sspp-split-clk-v1-1-806c0dee4e43@linaro.org>
Date:   Mon, 09 Oct 2023 18:36:12 +0200
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Neil Armstrong <neil.armstrong@...aro.org>
Subject: [PATCH RFC 1/5] drm/msm: dpu1: create a dpu_hw_clk_force_ctrl()
 helper

Add an helper to setup the force clock control as it will
be used in multiple HW files.

Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_top.c  | 23 +----------------------
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.c | 21 +++++++++++++++++++++
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.h |  4 ++++
 3 files changed, 26 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_top.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_top.c
index cff48763ce25..24e734768a72 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_top.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_top.c
@@ -66,34 +66,13 @@ static void dpu_hw_setup_split_pipe(struct dpu_hw_mdp *mdp,
 static bool dpu_hw_setup_clk_force_ctrl(struct dpu_hw_mdp *mdp,
 		enum dpu_clk_ctrl_type clk_ctrl, bool enable)
 {
-	struct dpu_hw_blk_reg_map *c;
-	u32 reg_off, bit_off;
-	u32 reg_val, new_val;
-	bool clk_forced_on;
-
 	if (!mdp)
 		return false;
 
-	c = &mdp->hw;
-
 	if (clk_ctrl <= DPU_CLK_CTRL_NONE || clk_ctrl >= DPU_CLK_CTRL_MAX)
 		return false;
 
-	reg_off = mdp->caps->clk_ctrls[clk_ctrl].reg_off;
-	bit_off = mdp->caps->clk_ctrls[clk_ctrl].bit_off;
-
-	reg_val = DPU_REG_READ(c, reg_off);
-
-	if (enable)
-		new_val = reg_val | BIT(bit_off);
-	else
-		new_val = reg_val & ~BIT(bit_off);
-
-	DPU_REG_WRITE(c, reg_off, new_val);
-
-	clk_forced_on = !(reg_val & BIT(bit_off));
-
-	return clk_forced_on;
+	return dpu_hw_clk_force_ctrl(&mdp->hw, &mdp->caps->clk_ctrls[clk_ctrl], enable);
 }
 
 
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.c
index 9d2273fd2fed..18b16b2d2bf5 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.c
@@ -546,3 +546,24 @@ void dpu_setup_cdp(struct dpu_hw_blk_reg_map *c, u32 offset,
 
 	DPU_REG_WRITE(c, offset, cdp_cntl);
 }
+
+bool dpu_hw_clk_force_ctrl(struct dpu_hw_blk_reg_map *c,
+			   const struct dpu_clk_ctrl_reg *clk_ctrl_reg,
+			   bool enable)
+{
+	u32 reg_val, new_val;
+	bool clk_forced_on;
+
+	reg_val = DPU_REG_READ(c, clk_ctrl_reg->reg_off);
+
+	if (enable)
+		new_val = reg_val | BIT(clk_ctrl_reg->bit_off);
+	else
+		new_val = reg_val & ~BIT(clk_ctrl_reg->bit_off);
+
+	DPU_REG_WRITE(c, clk_ctrl_reg->reg_off, new_val);
+
+	clk_forced_on = !(reg_val & BIT(clk_ctrl_reg->bit_off));
+
+	return clk_forced_on;
+}
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.h
index 1f6079f47071..4bea139081bc 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.h
@@ -367,4 +367,8 @@ int dpu_hw_collect_misr(struct dpu_hw_blk_reg_map *c,
 		u32 misr_signature_offset,
 		u32 *misr_value);
 
+bool dpu_hw_clk_force_ctrl(struct dpu_hw_blk_reg_map *c,
+			   const struct dpu_clk_ctrl_reg *clk_ctrl_reg,
+			   bool enable);
+
 #endif /* _DPU_HW_UTIL_H */

-- 
2.34.1