[PATCH v2] clk: qcom: Use parent rate when set rate to pixel RCG clock

[PATCH v2] clk: qcom: Use parent rate when set rate to pixel RCG clock

[Hai Li]

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.

v2: Rebase on clk-next and avoid build warning

Signed-off-by: Hai Li <hali@codeaurora.org>
Tested-by: Archit Taneja <architt@codeaurora.org>
Fixes: 99cbd064b059 ("clk: qcom: Support display RCG clocks")
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
---
 drivers/clk/qcom/clk-rcg2.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/clk/qcom/clk-rcg2.c b/drivers/clk/qcom/clk-rcg2.c
index b95d17f..92936f0 100644
--- 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,
-- 
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Re: [PATCH v2] clk: qcom: Use parent rate when set rate to pixel RCG clock

[Stephen Boyd]

On 07/06/2015 07:49 AM, Hai Li wrote:
> 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.
>
> v2: Rebase on clk-next and avoid build warning
>
> Signed-off-by: Hai Li <hali@codeaurora.org>
> Tested-by: Archit Taneja <architt@codeaurora.org>
> Fixes: 99cbd064b059 ("clk: qcom: Support display RCG clocks")
> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
> ---

Huh? I didn't sign this off. The original patch was already applied, so
a new patch on top of the patch in -next that removed the index and
parent lines and renamed the variable should have been sent. Then we
have the option of applying the new patch on top to silence the warning,
or to squash it into the original patch if we want to redo clk-fixes.
I've opted to redo clk-fixes this time.

-- 
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