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clk: qcom: dispcc-sc8280xp: remove CLK_SET_RATE_PARENT from byte_div_clk_src dividers

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The four byte_div_clk_src dividers (disp{0,1}_cc_mdss_byte{0,1}_div_clk_src)
had CLK_SET_RATE_PARENT set. When the DSI driver calls clk_set_rate() on
byte_intf_clk, the rate-change propagates through the divider up to the
parent PLL (byte_clk_src), halving the byte clock rate.

A simiar issue had been also encountered on SM8750.
b8501febdc ("clk: qcom: dispcc-sm8750: Drop incorrect CLK_SET_RATE_PARENT on byte intf parent").

Likewise, remove CLK_SET_RATE_PARENT from all four byte divider clocks
so that clk_set_rate() on the divider adjusts only the divider ratio,
leaving the parent PLL untouched.

Fixes: 4a66e76fdb ("clk: qcom: Add SC8280XP display clock controller")
Signed-off-by: White Lewis <liu224806@gmail.com>
[pengyu: reword]
Signed-off-by: Pengyu Luo <mitltlatltl@gmail.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260303115550.9279-1-mitltlatltl@gmail.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
This commit is contained in:
White Lewis
2026-03-03 19:55:50 +08:00
committed by Bjorn Andersson
parent e7c8eb1646
commit 0b151a6307
1 changed files with 0 additions and 4 deletions
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4
drivers/clk/qcom/dispcc-sc8280xp.c
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@@ -1160,7 +1160,6 @@ static struct clk_regmap_div disp0_cc_mdss_byte0_div_clk_src = {
&disp0_cc_mdss_byte0_clk_src.clkr.hw,
},
.num_parents = 1,
.flags = CLK_SET_RATE_PARENT,
.ops = &clk_regmap_div_ops,
},
};
@@ -1175,7 +1174,6 @@ static struct clk_regmap_div disp1_cc_mdss_byte0_div_clk_src = {
&disp1_cc_mdss_byte0_clk_src.clkr.hw,
},
.num_parents = 1,
.flags = CLK_SET_RATE_PARENT,
.ops = &clk_regmap_div_ops,
},
};
@@ -1190,7 +1188,6 @@ static struct clk_regmap_div disp0_cc_mdss_byte1_div_clk_src = {
&disp0_cc_mdss_byte1_clk_src.clkr.hw,
},
.num_parents = 1,
.flags = CLK_SET_RATE_PARENT,
.ops = &clk_regmap_div_ops,
},
};
@@ -1205,7 +1202,6 @@ static struct clk_regmap_div disp1_cc_mdss_byte1_div_clk_src = {
&disp1_cc_mdss_byte1_clk_src.clkr.hw,
},
.num_parents = 1,
.flags = CLK_SET_RATE_PARENT,
.ops = &clk_regmap_div_ops,
},
};