clk: qcom: dispcc-sm4450: Fix DSI byte clock rate setting

The clock tree for byte_clk_src is as follows:

   ┌──────byte0_clk_src─────┐
   │                        │
byte0_clk            byte0_div_clk_src
                            │
                     byte0_intf_clk

If both of its direct children have CLK_SET_RATE_PARENT with different
requests, byte0_clk_src (and its parent) will be reconfigured. In this
case, byte0_intf should strictly follow the rate of byte0_clk (with
some adjustments based on PHY mode).

Remove CLK_SET_RATE_PARENT from byte0_div_clk_src to avoid this issue.

Fixes: 76f05f1ec766 ("clk: qcom: Add DISPCC driver support for SM4450")
Signed-off-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260304-topic-dsi_byte_fixup-v1-4-b79b29f83176@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

diff --git a/drivers/clk/qcom/dispcc-sm4450.c b/drivers/clk/qcom/dispcc-sm4450.c
index e8752d01c8e629a1daaefe66e5d24bba0c61e2ca..2fdacc26df698d473adae99602b4ef1636550139 100644 (file)
--- a/drivers/clk/qcom/dispcc-sm4450.c
+++ b/drivers/clk/qcom/dispcc-sm4450.c
@@ -335,7 +335,6 @@ static struct clk_regmap_div disp_cc_mdss_byte0_div_clk_src = {
                        &disp_cc_mdss_byte0_clk_src.clkr.hw,
                },
                .num_parents = 1,
-               .flags = CLK_SET_RATE_PARENT,
                .ops = &clk_regmap_div_ops,
        },
 };