clk: qcom: Use parent rate when set rate to pixel RCG clock

Since the parent rate has been recalculated, pixel RCG clock
should rely on it to find the correct M/N values during set_rate,
instead of calling __clk_round_rate() to its parent again.

Signed-off-by: Hai Li <hali@codeaurora.org>
Tested-by: Archit Taneja <architt@codeaurora.org>
Fixes: 99cbd064b059 ("clk: qcom: Support display RCG clocks")
[sboyd@codeaurora.org: Silenced unused parent variable warning]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

diff --git a/drivers/clk/qcom/clk-rcg2.c b/drivers/clk/qcom/clk-rcg2.c
index b95d17f..92936f0 100644 (file)
--- a/drivers/clk/qcom/clk-rcg2.c
+++ b/drivers/clk/qcom/clk-rcg2.c
@@ -530,19 +530,16 @@ static int clk_pixel_set_rate(struct clk_hw *hw, unsigned long rate,
        struct clk_rcg2 *rcg = to_clk_rcg2(hw);
        struct freq_tbl f = *rcg->freq_tbl;
        const struct frac_entry *frac = frac_table_pixel;
-       unsigned long request, src_rate;
+       unsigned long request;
        int delta = 100000;
        u32 mask = BIT(rcg->hid_width) - 1;
        u32 hid_div;
-       int index = qcom_find_src_index(hw, rcg->parent_map, f.src);
-       struct clk *parent = clk_get_parent_by_index(hw->clk, index);
 
        for (; frac->num; frac++) {
                request = (rate * frac->den) / frac->num;
 
-               src_rate = __clk_round_rate(parent, request);
-               if ((src_rate < (request - delta)) ||
-                       (src_rate > (request + delta)))
+               if ((parent_rate < (request - delta)) ||
+                       (parent_rate > (request + delta)))
                        continue;
 
                regmap_read(rcg->clkr.regmap, rcg->cmd_rcgr + CFG_REG,