Re: [PATCH 6/9] media: vsp1: Add support for missing 16-bit RGB555 formats

From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: Jacopo Mondi <jacopo@jmondi.org>
Cc: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>,
	dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org,
	linux-renesas-soc@vger.kernel.org,
	Maxime Ripard <maxime.ripard@bootlin.com>
Subject: Re: [PATCH 6/9] media: vsp1: Add support for missing 16-bit RGB555 formats
Date: Tue, 23 Apr 2019 17:46:51 +0300	[thread overview]
Message-ID: <20190423144651.GA16111@pendragon.ideasonboard.com> (raw)
In-Reply-To: <20190423135508.ppdphyqy2z55ewhm@uno.localdomain>

Hi Jacopo,

On Tue, Apr 23, 2019 at 03:55:08PM +0200, Jacopo Mondi wrote:
> On Thu, Mar 28, 2019 at 09:07:20AM +0200, Laurent Pinchart wrote:
> > Add support for the V4L2_PIX_FMT_RGBA555, V4L2_PIX_FMT_RGBX555,
> > V4L2_PIX_FMT_ABGR555, V4L2_PIX_FMT_XBGR555, V4L2_PIX_FMT_BGRA555 and
> > V4L2_PIX_FMT_BGRX555 formats to the VSP driver.
> >
> > Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> > ---
> >  drivers/media/platform/vsp1/vsp1_pipe.c | 32 +++++++++++++++++++++++++
> >  1 file changed, 32 insertions(+)
> >
> > diff --git a/drivers/media/platform/vsp1/vsp1_pipe.c b/drivers/media/platform/vsp1/vsp1_pipe.c
> > index f6665871aa11..92f71dec99c5 100644
> > --- a/drivers/media/platform/vsp1/vsp1_pipe.c
> > +++ b/drivers/media/platform/vsp1/vsp1_pipe.c
> > @@ -66,14 +66,46 @@ static const struct vsp1_format_info vsp1_video_formats[] = {
> >  	  VI6_FMT_BGRA_4444, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
> >  	  VI6_RPF_DSWAP_P_WDS,
> >  	  1, { 16, 0, 0 }, false, false, 1, 1, false },
> > +#define V4L2_PIX_FMT_ARGB555 v4l2_fourcc('A', 'R', '1', '5') /* 16  ARGB-1-5-5-5  */
> 
> Why is this here? I see the exact same line in videodev2.h.
> Is this a leftover?

Oops. It is. I'm sorry, I'll remove that.

> >  	{ V4L2_PIX_FMT_ARGB555, MEDIA_BUS_FMT_ARGB8888_1X32,
> >  	  VI6_FMT_ARGB_1555, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
> >  	  VI6_RPF_DSWAP_P_WDS,
> >  	  1, { 16, 0, 0 }, false, false, 1, 1, true },
> > +#define V4L2_PIX_FMT_XRGB555 v4l2_fourcc('X', 'R', '1', '5') /* 16  XRGB-1-5-5-5  */
> 
> same here and below
> 
> >  	{ V4L2_PIX_FMT_XRGB555, MEDIA_BUS_FMT_ARGB8888_1X32,
> >  	  VI6_FMT_XRGB_1555, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
> >  	  VI6_RPF_DSWAP_P_WDS,
> >  	  1, { 16, 0, 0 }, false, false, 1, 1, false },
> > +#define V4L2_PIX_FMT_RGBA555 v4l2_fourcc('R', 'A', '1', '5') /* 16  RGBA-5-5-5-1  */
> > +	{ V4L2_PIX_FMT_RGBA555, MEDIA_BUS_FMT_ARGB8888_1X32,
> > +	  VI6_FMT_RGBA_5551, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
> > +	  VI6_RPF_DSWAP_P_WDS,
> > +	  1, { 16, 0, 0 }, false, false, 1, 1, true },
> > +#define V4L2_PIX_FMT_RGBX555 v4l2_fourcc('R', 'X', '1', '5') /* 16  RGBX-5-5-5-1  */
> > +	{ V4L2_PIX_FMT_RGBX555, MEDIA_BUS_FMT_ARGB8888_1X32,
> > +	  VI6_FMT_RGBX_5551, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
> > +	  VI6_RPF_DSWAP_P_WDS,
> > +	  1, { 16, 0, 0 }, false, false, 1, 1, false },
> > +#define V4L2_PIX_FMT_ABGR555 v4l2_fourcc('A', 'B', '1', '5') /* 16  ABGR-1-5-5-5  */
> > +	{ V4L2_PIX_FMT_ABGR555, MEDIA_BUS_FMT_ARGB8888_1X32,
> > +	  VI6_FMT_ABGR_1555, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
> > +	  VI6_RPF_DSWAP_P_WDS,
> > +	  1, { 16, 0, 0 }, false, false, 1, 1, true },
> > +#define V4L2_PIX_FMT_XBGR555 v4l2_fourcc('X', 'B', '1', '5') /* 16  XBGR-1-5-5-5  */
> > +	{ V4L2_PIX_FMT_XBGR555, MEDIA_BUS_FMT_ARGB8888_1X32,
> > +	  VI6_FMT_ABGR_1555, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
> > +	  VI6_RPF_DSWAP_P_WDS,
> > +	  1, { 16, 0, 0 }, false, false, 1, 1, false },
> 
> Looks good, additional defines apart
> 
> > +#define V4L2_PIX_FMT_BGRA555 v4l2_fourcc('B', 'A', '1', '5') /* 16  BGRA-5-5-5-1  */
> > +	{ V4L2_PIX_FMT_BGRA555, MEDIA_BUS_FMT_ARGB8888_1X32,
> > +	  VI6_FMT_BGRA_5551, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
> > +	  VI6_RPF_DSWAP_P_WDS,
> > +	  1, { 16, 0, 0 }, false, false, 1, 1, true },
> 
> 
> As I read this:
> V4L2_PIX_FMT_BGRA555            VI6_FMT_BGRA_5551        LLS|LWS|WDS
> gggrrrrr abbbbbgg               bbbbbggg ggrrrrra       ggrrrrra bbbbbggg

Isn't V4L2_PIX_FMT_BGRA555 is defined as

g1 g0 r4 r3 r2 r1 r0 a | b4 b3 b2 b1 b0 g4 g3 g2

?

> They seems different to me:
>         gggrrrrr abbbbbgg
>         ggrrrrra bbbbbggg
> 
> But I have not find any better combination from table 23.10 that would
> result in the desired 'gggrrrrr abbbbbgg' ordering.
> 
> > +#define V4L2_PIX_FMT_BGRX555 v4l2_fourcc('B', 'X', '1', '5') /* 16  BGRX-5-5-5-1  */
> > +	{ V4L2_PIX_FMT_BGRX555, MEDIA_BUS_FMT_ARGB8888_1X32,
> > +	  VI6_FMT_BGRA_5551, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
> > +	  VI6_RPF_DSWAP_P_WDS,
> > +	  1, { 16, 0, 0 }, false, false, 1, 1, false },
> 
> Same as above.
> 
> The last two entries apart:
> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
> 
> >  	{ V4L2_PIX_FMT_RGB565, MEDIA_BUS_FMT_ARGB8888_1X32,
> >  	  VI6_FMT_RGB_565, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS |
> >  	  VI6_RPF_DSWAP_P_WDS,

-- 
Regards,

Laurent Pinchart