Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.1 241/267] clk: qcom: Use parent rate when set rate to pixel RCG clock | Date | Fri, 31 Jul 2015 12:41:32 -0700 |
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4.1-stable review patch. If anyone has any objections, please let me know.
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From: Hai Li <hali@codeaurora.org>
commit 6d451367bfa16fc103604bacd258f534c65d1540 upstream.
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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/clk/qcom/clk-rcg2.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-)
--- 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 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,
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