linux-kernel - Re: [PATCH V4 0/4] clk: imx: Improve imx8mm/imx8mn LCDIF clocks

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Message-ID: <ZCbTmitvBTQu26PX@linaro.org>
Date:   Fri, 31 Mar 2023 15:35:38 +0300
From:   Abel Vesa <abel.vesa@...aro.org>
To:     Adam Ford <aford173@...il.com>
Cc:     linux-clk@...r.kernel.org, aford@...conembedded.com,
        Abel Vesa <abelvesa@...nel.org>, Peng Fan <peng.fan@....com>,
        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>,
        NXP Linux Team <linux-imx@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V4 0/4] clk: imx: Improve imx8mm/imx8mn LCDIF clocks

On 23-03-23 18:01:23, Adam Ford wrote:
> Both the i.MX8M Mini and Nano have a video_pll which can be used 
> to source a clock which feeds the lcdif interface.  This interface
> currently fixes video_pll and divides down the clock feeding LCDIF.
> However, when connected to an HDMI bridge chip that supports a
> variety of video resolutions and refresh rates, the only settings
> that properly sync are ones that evenly divide from the video_pll_out
> clock.
> 
> This series adds the ability for the clk-compolsite-8m to
> request a better parent clock rate if the proper clock flag is
> enable and sets that flag in the corresponding imx8mm and 
> imx8mn video_pll clocks to increase the number of resolutions
> and refresh rates timings that the LCDIF can produce.
> 
> This also has a side benefit of allowing the video-pll to run
> at a lower clock speed which can potentially save some power
> depending on the requested resolution and refresh rate.
> 

Applied, thanks!

[1/4] clk: imx: composite-8m: Add support to determine_rate
      commit: 156e96ff2172518b6f83e97d8f11f677bc668e22
[2/4] clk: imx: Add imx8m_clk_hw_composite_flags macro
      commit: 784a9b3916e949c00666588fd167c4ab245ec9d6
[3/4] clk: imx8mm: Let IMX8MM_CLK_LCDIF_PIXEL set parent rate
      commit: 5fe6ec93f10b0765d59e0efb6ecba419a6a49d48
[4/4] clk: imx: Let IMX8MN_CLK_DISP_PIXEL set parent rate
      commit: 46a974433ea7fa468b45db70536f7cea81feb87c


Best regards,
--
Abel Vesa <abel.vesa@...aro.org>



> v4:  Sorry for the noise.  I forgot to 'git ammend' so V4
>      is what V3 should have been.
> V3:  Change the name of clk_divider_determine_rate to
>       imx8m_clk_divider_determine_rate
> V2:  Split off the new imx8m_clk_hw_composite_flags definition
>      into its own patch and re-order to fix build error.
>       
> Adam Ford (3):
>   clk: imx: composite-8m: Add support to determine_rate
>   clk: imx8mm: Let IMX8MM_CLK_LCDIF_PIXEL set parent rate
>   clk: imx: Let IMX8MN_CLK_DISP_PIXEL set parent rate
> 
>  drivers/clk/imx/clk-composite-8m.c | 7 +++++++
>  drivers/clk/imx/clk-imx8mm.c       | 2 +-
>  drivers/clk/imx/clk-imx8mn.c       | 2 +-
>  drivers/clk/imx/clk.h              | 4 ++++
>  4 files changed, 13 insertions(+), 2 deletions(-)
> 
> -- 
> 2.34.1
>