Re: [RESEND PATCH 3/3] drm/mediatek: mtk_dpi: Use simple encoder

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Hi again,

On 8/7/20 17:12, Enric Balletbo i Serra wrote:
> 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@xxxxxxxxxxxxx> 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@xxxxxxxxxxxxx>
>>> Reviewed-by: Chun-Kuang Hu <chunkuang.hu@xxxxxxxxxx>
>>> ---
>>>
>>>  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?
>>
> 

Thinking a bit more about this and this patchset in general, I think I'll drop
this patch from the series, at the end, all the encoder creation stuff should be
moved to mtk_drm_drv.


> Right, I'll add a patch to fix this.
> 
>>>  	if (ret) {
>>>  		dev_err(dev, "Failed to initialize decoder: %d\n", ret);
>>>  		goto err_unregister;
>>
> 
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