linux-kernel - Re: [PATCH v1 07/17] drm/mediatek: extract common functions from the mtk hdmi driver

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Date:   Tue, 27 Sep 2022 06:08:43 -0700
From:   Guillaume Ranquet <granquet@...libre.com>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Vinod Koul <vkoul@...nel.org>, Stephen Boyd <sboyd@...nel.org>,
        David Airlie <airlied@...ux.ie>,
        Rob Herring <robh+dt@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Daniel Vetter <daniel@...ll.ch>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        CK Hu <ck.hu@...iatek.com>, Jitao shi <jitao.shi@...iatek.com>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Kishon Vijay Abraham I <kishon@...com>
Cc:     linux-mediatek@...ts.infradead.org,
        dri-devel@...ts.freedesktop.org,
        Pablo Sun <pablo.sun@...iatek.com>, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Mattijs Korpershoek <mkorpershoek@...libre.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-phy@...ts.infradead.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v1 07/17] drm/mediatek: extract common functions from the
 mtk hdmi driver

On Tue, 20 Sep 2022 12:25, AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com> wrote:
>Il 19/09/22 18:56, Guillaume Ranquet ha scritto:
>> Create a common "framework" that can be used to add support for
>> different hdmi IPs within the mediatek range of products.
>>
>> Signed-off-by: Guillaume Ranquet <granquet@...libre.com>
>>
>> diff --git a/drivers/gpu/drm/mediatek/Makefile b/drivers/gpu/drm/mediatek/Makefile
>> index d4d193f60271..008ec69da67b 100644
>> --- a/drivers/gpu/drm/mediatek/Makefile
>> +++ b/drivers/gpu/drm/mediatek/Makefile
>> @@ -22,7 +22,8 @@ obj-$(CONFIG_DRM_MEDIATEK) += mediatek-drm.o
>>
>>   mediatek-drm-hdmi-objs := mtk_cec.o \
>>   			  mtk_hdmi.o \
>
>abcd ... mtk_hdmi_common.o goes here :-)
>
>> -			  mtk_hdmi_ddc.o
>> +			  mtk_hdmi_ddc.o \
>> +			  mtk_hdmi_common.o \
>>
>>   obj-$(CONFIG_DRM_MEDIATEK_HDMI) += mediatek-drm-hdmi.o
>>
>> diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
>> index 5cd05d4fe1a9..837d36ec4d64 100644
>> --- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
>> +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
>> @@ -32,187 +32,18 @@
>>   #include <drm/drm_probe_helper.h>
>>
>>   #include "mtk_cec.h"
>> -#include "mtk_hdmi.h"
>>   #include "mtk_hdmi_regs.h"
>> +#include "mtk_hdmi_common.h"
>>
>>   #define NCTS_BYTES	7
>>
>> -enum mtk_hdmi_clk_id {
>> -	MTK_HDMI_CLK_HDMI_PIXEL,
>> -	MTK_HDMI_CLK_HDMI_PLL,
>> -	MTK_HDMI_CLK_AUD_BCLK,
>> -	MTK_HDMI_CLK_AUD_SPDIF,
>> -	MTK_HDMI_CLK_COUNT
>> +const char * const mtk_hdmi_clk_names_mt8183[MTK_MT8183_HDMI_CLK_COUNT] = {
>
>Why MT8183? This can be either MT8167 or MT2701... or, IMO more appropriately, you
>should name the IP version.
>Example: MTK_HDMIV123_CLK_COUNT (I don't know what IP version would that be!).

You're right, the naming isn't great.
I'll ask mediatek if they have a good name that would regroup the "legacy"
HDMI IP and the new IP in mt8195.

Thx,
Guillaume.

>
>> +	[MTK_MT8183_HDMI_CLK_HDMI_PIXEL] = "pixel",
>> +	[MTK_MT8183_HDMI_CLK_HDMI_PLL] = "pll",
>> +	[MTK_MT8183_HDMI_CLK_AUD_BCLK] = "bclk",
>> +	[MTK_MT8183_HDMI_CLK_AUD_SPDIF] = "spdif",
>>   };
>>
>
>Regards,
>Angelo
>
>