linux-kernel - RE: [PATCH] Revert "clk: imx: composite-8m: Add support to determine

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Date:   Mon, 24 Apr 2023 01:43:43 +0000
From:   Peng Fan <peng.fan@....com>
To:     Adam Ford <aford173@...il.com>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>
CC:     "aford@...conembedded.com" <aford@...conembedded.com>,
        Abel Vesa <abelvesa@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] Revert "clk: imx: composite-8m: Add support to
 determine_rate"

> Subject: [PATCH] Revert "clk: imx: composite-8m: Add support to
> determine_rate"
> 
> This reverts commit 156e96ff2172518b6f83e97d8f11f677bc668e22.
> 
> This patch was found to cause some division issues on the i.MX8MP which
> causes the video clocks to not properly divide when division was greate than
> 8.  This causes video failures on disp1_pix and disp2_pix clocks.
> 
> Until a better solution is found, we'll have to revert this.
> 
> Signed-off-by: Adam Ford <aford173@...il.com>

Indeed we already see issue in NXP local CI with the previous patch.

Acked-by: Peng Fan <peng.fan@....com>

> 
> diff --git a/drivers/clk/imx/clk-composite-8m.c b/drivers/clk/imx/clk-
> composite-8m.c
> index 6883a8199b6c..cbf0d7955a00 100644
> --- a/drivers/clk/imx/clk-composite-8m.c
> +++ b/drivers/clk/imx/clk-composite-8m.c
> @@ -119,17 +119,10 @@ static int
> imx8m_clk_composite_divider_set_rate(struct clk_hw *hw,
>  	return ret;
>  }
> 
> -static int imx8m_clk_divider_determine_rate(struct clk_hw *hw,
> -				      struct clk_rate_request *req)
> -{
> -	return clk_divider_ops.determine_rate(hw, req);
> -}
> -
>  static const struct clk_ops imx8m_clk_composite_divider_ops = {
>  	.recalc_rate = imx8m_clk_composite_divider_recalc_rate,
>  	.round_rate = imx8m_clk_composite_divider_round_rate,
>  	.set_rate = imx8m_clk_composite_divider_set_rate,
> -	.determine_rate = imx8m_clk_divider_determine_rate,
>  };
> 
>  static u8 imx8m_clk_composite_mux_get_parent(struct clk_hw *hw)
> --
> 2.39.2