Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Subject: Re: [RESEND PATCH 3/3] drm/mediatek: mtk_dpi: Use simple encoder
To:     Boris Brezillon <boris.brezillon@collabora.com>
Cc:     linux-kernel@vger.kernel.org,
        Collabora Kernel ML <kernel@collabora.com>,
        narmstrong@baylibre.com, a.hajda@samsung.com,
        laurent.pinchart@ideasonboard.com, matthias.bgg@gmail.com,
        drinkcat@chromium.org, hsinyi@chromium.org,
        Chun-Kuang Hu <chunkuang.hu@kernel.org>,
        Daniel Vetter <daniel@ffwll.ch>,
        David Airlie <airlied@linux.ie>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        dri-devel@lists.freedesktop.org,
        linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org
References: <20200518173909.2259259-1-enric.balletbo@collabora.com>
 <20200518173909.2259259-4-enric.balletbo@collabora.com>
 <20200701134128.6a967a89@collabora.com>
From:   Enric Balletbo i Serra <enric.balletbo@collabora.com>
Message-ID: <3f7338ad-b83d-da1d-2b07-f5225c56d7f9@collabora.com>
Date:   Wed, 8 Jul 2020 17:12:41 +0200
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101
 Thunderbird/68.10.0
MIME-Version: 1.0
In-Reply-To: <20200701134128.6a967a89@collabora.com>
Content-Type: text/plain; charset=utf-8
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Hi Boris,

Thank you to spend some time to review the patches.

On 1/7/20 13:41, Boris Brezillon wrote:
> On Mon, 18 May 2020 19:39:09 +0200
> Enric Balletbo i Serra <enric.balletbo@collabora.com> wrote:
> 
>> The mtk_dpi driver uses an empty implementation for its encoder. Replace
>> the code with the generic simple encoder.
>>
>> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
>> Reviewed-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
>> ---
>>
>>  drivers/gpu/drm/mediatek/mtk_dpi.c | 14 +++-----------
>>  1 file changed, 3 insertions(+), 11 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
>> index baad198c69eb..80778b2aac2a 100644
>> --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
>> +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
>> @@ -20,6 +20,7 @@
>>  #include <drm/drm_bridge.h>
>>  #include <drm/drm_crtc.h>
>>  #include <drm/drm_of.h>
>> +#include <drm/drm_simple_kms_helper.h>
>>  
>>  #include "mtk_dpi_regs.h"
>>  #include "mtk_drm_ddp_comp.h"
>> @@ -510,15 +511,6 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
>>  	return 0;
>>  }
>>  
>> -static void mtk_dpi_encoder_destroy(struct drm_encoder *encoder)
>> -{
>> -	drm_encoder_cleanup(encoder);
>> -}
>> -
>> -static const struct drm_encoder_funcs mtk_dpi_encoder_funcs = {
>> -	.destroy = mtk_dpi_encoder_destroy,
>> -};
>> -
>>  static int mtk_dpi_bridge_attach(struct drm_bridge *bridge,
>>  				 enum drm_bridge_attach_flags flags)
>>  {
>> @@ -591,8 +583,8 @@ static int mtk_dpi_bind(struct device *dev, struct device *master, void *data)
>>  		return ret;
>>  	}
>>  
>> -	ret = drm_encoder_init(drm_dev, &dpi->encoder, &mtk_dpi_encoder_funcs,
>> -			       DRM_MODE_ENCODER_TMDS, NULL);
>> +	ret = drm_simple_encoder_init(drm_dev, &dpi->encoder,
>> +				      DRM_MODE_ENCODER_TMDS);
> 
> Not related to this change, but shouldn't we have DRM_MODE_ENCODER_DPI
> here?
> 

Right, I'll add a patch to fix this.

>>  	if (ret) {
>>  		dev_err(dev, "Failed to initialize decoder: %d\n", ret);
>>  		goto err_unregister;
>