linux-kernel - Re: [PATCH v2 2/5] clk: imx: replace osc

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Message-ID: <Y3vb1r8G+B8n3T+A@linaro.org>
Date:   Mon, 21 Nov 2022 22:13:10 +0200
From:   Abel Vesa <abel.vesa@...aro.org>
To:     Dario Binacchi <dario.binacchi@...rulasolutions.com>,
        Peng Fan <peng.fan@....com>
Cc:     linux-kernel@...r.kernel.org, linux-amarula@...rulasolutions.com,
        michael@...rulasolutions.com, Abel Vesa <abelvesa@...nel.org>,
        Anson Huang <Anson.Huang@....com>,
        Fabio Estevam <festevam@...il.com>,
        Michael Turquette <mturquette@...libre.com>,
        NXP Linux Team <linux-imx@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-clk@...r.kernel.org
Subject: Re: [PATCH v2 2/5] clk: imx: replace osc_hdmi with dummy

On 22-11-17 12:36:34, Dario Binacchi wrote:
> There is no occurrence of the hdmi oscillator in the reference manual
> (document IMX8MNRM Rev 2, 07/2022). Further, if we consider the indexes
> 76-81 and 134 of the "Clock Root" table of chapter 5 of the RM, there is
> no entry for the source select bits 101b, which is the setting referenced
> by "osc_hdmi".
> Fix by renaming "osc_hdmi" with "dummy", a clock which has already been
> used for missing source select bits.
> 
> Tested on the BSH SystemMaster (SMM) S2 board.
> 
> Fixes: 96d6392b54dbb ("clk: imx: Add support for i.MX8MN clock driver")
> Signed-off-by: Dario Binacchi <dario.binacchi@...rulasolutions.com>

I don't think this is correct. It might even break the EVKs HDMI
support.

Peng, can you please confirm ?

> ---
> 
> (no changes since v1)
> 
>  drivers/clk/imx/clk-imx8mn.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/clk/imx/clk-imx8mn.c b/drivers/clk/imx/clk-imx8mn.c
> index 72f9563a0ff6..0fae97e61e2c 100644
> --- a/drivers/clk/imx/clk-imx8mn.c
> +++ b/drivers/clk/imx/clk-imx8mn.c
> @@ -108,27 +108,27 @@ static const char * const imx8mn_disp_pixel_sels[] = {"osc_24m", "video_pll1_out
>  						      "sys_pll3_out", "clk_ext4", };
>  
>  static const char * const imx8mn_sai2_sels[] = {"osc_24m", "audio_pll1_out", "audio_pll2_out",
> -						"video_pll1_out", "sys_pll1_133m", "osc_hdmi",
> +						"video_pll1_out", "sys_pll1_133m", "dummy",
>  						"clk_ext3", "clk_ext4", };
>  
>  static const char * const imx8mn_sai3_sels[] = {"osc_24m", "audio_pll1_out", "audio_pll2_out",
> -						"video_pll1_out", "sys_pll1_133m", "osc_hdmi",
> +						"video_pll1_out", "sys_pll1_133m", "dummy",
>  						"clk_ext3", "clk_ext4", };
>  
>  static const char * const imx8mn_sai5_sels[] = {"osc_24m", "audio_pll1_out", "audio_pll2_out",
> -						"video_pll1_out", "sys_pll1_133m", "osc_hdmi",
> +						"video_pll1_out", "sys_pll1_133m", "dummy",
>  						"clk_ext2", "clk_ext3", };
>  
>  static const char * const imx8mn_sai6_sels[] = {"osc_24m", "audio_pll1_out", "audio_pll2_out",
> -						"video_pll1_out", "sys_pll1_133m", "osc_hdmi",
> +						"video_pll1_out", "sys_pll1_133m", "dummy",
>  						"clk_ext3", "clk_ext4", };
>  
>  static const char * const imx8mn_sai7_sels[] = {"osc_24m", "audio_pll1_out", "audio_pll2_out",
> -						"video_pll1_out", "sys_pll1_133m", "osc_hdmi",
> +						"video_pll1_out", "sys_pll1_133m", "dummy",
>  						"clk_ext3", "clk_ext4", };
>  
>  static const char * const imx8mn_spdif1_sels[] = {"osc_24m", "audio_pll1_out", "audio_pll2_out",
> -						  "video_pll1_out", "sys_pll1_133m", "osc_hdmi",
> +						  "video_pll1_out", "sys_pll1_133m", "dummy",
>  						  "clk_ext2", "clk_ext3", };
>  
>  static const char * const imx8mn_enet_ref_sels[] = {"osc_24m", "sys_pll2_125m", "sys_pll2_50m",
> -- 
> 2.32.0
>