From: Laurent Pinchart <laurent.pinchart@ideasonboard.com> To: Maxime Ripard <maxime@cerno.tech> Cc: Maxime Ripard <mripard@kernel.org>, Eric Anholt <eric@anholt.net>, Daniel Vetter <daniel@ffwll.ch>, David Airlie <airlied@linux.ie>, Rob Herring <robh@kernel.org>, Emma Anholt <emma@anholt.net>, dri-devel@lists.freedesktop.org, Joerg Quinten <aBUGSworstnightmare@gmail.com>, Chris Morgan <macromorgan@hotmail.com>, Dave Stevenson <dave.stevenson@raspberrypi.com>, linux-kernel@vger.kernel.org Subject: Re: [PATCH 7/7] drm/vc4: dpi: Fix format mapping for RGB565 Date: Sat, 15 Oct 2022 20:19:03 +0300 [thread overview] Message-ID: <Y0rrh4cvqHFgcz9M@pendragon.ideasonboard.com> (raw) In-Reply-To: <20221013-rpi-dpi-improvements-v1-7-8a7a96949cb0@cerno.tech> Hi Maxime and Dave, Thank you for the patch. On Thu, Oct 13, 2022 at 11:56:51AM +0200, Maxime Ripard wrote: > From: Dave Stevenson <dave.stevenson@raspberrypi.com> > > The mapping is incorrect for RGB565_1X16 as it should be > DPI_FORMAT_18BIT_666_RGB_1 instead of DPI_FORMAT_18BIT_666_RGB_3. The driver includes the following macro definitions and comments: /* Outputs 00000000rrrrrggggggbbbbb */ # define DPI_FORMAT_16BIT_565_RGB_1 1 /* Outputs 000rrrrr00gggggg000bbbbb */ # define DPI_FORMAT_16BIT_565_RGB_2 2 /* Outputs 00rrrrr000gggggg00bbbbb0 */ # define DPI_FORMAT_16BIT_565_RGB_3 3 MEDIA_BUS_FMT_RGB565_1X16 is defined as described in https://linuxtv.org/downloads/v4l-dvb-apis/userspace-api/v4l/subdev-formats.html#id3: Bit | 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Data | r4 r3 r2 r1 r0 g5 g4 g3 g2 g1 g0 b4 b3 b2 b1 b0 This seems to match DPI_FORMAT_16BIT_565_RGB_1 indeed. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > Fixes: 08302c35b59d ("drm/vc4: Add DPI driver") > Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com> > Signed-off-by: Maxime Ripard <maxime@cerno.tech> > --- > drivers/gpu/drm/vc4/vc4_dpi.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/vc4/vc4_dpi.c b/drivers/gpu/drm/vc4/vc4_dpi.c > index fdae02760b6d..a7bebfa5d5b0 100644 > --- a/drivers/gpu/drm/vc4/vc4_dpi.c > +++ b/drivers/gpu/drm/vc4/vc4_dpi.c > @@ -185,7 +185,7 @@ static void vc4_dpi_encoder_enable(struct drm_encoder *encoder) > DPI_FORMAT); > break; > case MEDIA_BUS_FMT_RGB565_1X16: > - dpi_c |= VC4_SET_FIELD(DPI_FORMAT_16BIT_565_RGB_3, > + dpi_c |= VC4_SET_FIELD(DPI_FORMAT_16BIT_565_RGB_1, > DPI_FORMAT); > break; > case MEDIA_BUS_FMT_RGB565_1X24_CPADHI: > -- Regards, Laurent Pinchart
WARNING: multiple messages have this Message-ID (diff)
From: Laurent Pinchart <laurent.pinchart@ideasonboard.com> To: Maxime Ripard <maxime@cerno.tech> Cc: Chris Morgan <macromorgan@hotmail.com>, Emma Anholt <emma@anholt.net>, Dave Stevenson <dave.stevenson@raspberrypi.com>, David Airlie <airlied@linux.ie>, linux-kernel@vger.kernel.org, Eric Anholt <eric@anholt.net>, Joerg Quinten <aBUGSworstnightmare@gmail.com>, dri-devel@lists.freedesktop.org Subject: Re: [PATCH 7/7] drm/vc4: dpi: Fix format mapping for RGB565 Date: Sat, 15 Oct 2022 20:19:03 +0300 [thread overview] Message-ID: <Y0rrh4cvqHFgcz9M@pendragon.ideasonboard.com> (raw) In-Reply-To: <20221013-rpi-dpi-improvements-v1-7-8a7a96949cb0@cerno.tech> Hi Maxime and Dave, Thank you for the patch. On Thu, Oct 13, 2022 at 11:56:51AM +0200, Maxime Ripard wrote: > From: Dave Stevenson <dave.stevenson@raspberrypi.com> > > The mapping is incorrect for RGB565_1X16 as it should be > DPI_FORMAT_18BIT_666_RGB_1 instead of DPI_FORMAT_18BIT_666_RGB_3. The driver includes the following macro definitions and comments: /* Outputs 00000000rrrrrggggggbbbbb */ # define DPI_FORMAT_16BIT_565_RGB_1 1 /* Outputs 000rrrrr00gggggg000bbbbb */ # define DPI_FORMAT_16BIT_565_RGB_2 2 /* Outputs 00rrrrr000gggggg00bbbbb0 */ # define DPI_FORMAT_16BIT_565_RGB_3 3 MEDIA_BUS_FMT_RGB565_1X16 is defined as described in https://linuxtv.org/downloads/v4l-dvb-apis/userspace-api/v4l/subdev-formats.html#id3: Bit | 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Data | r4 r3 r2 r1 r0 g5 g4 g3 g2 g1 g0 b4 b3 b2 b1 b0 This seems to match DPI_FORMAT_16BIT_565_RGB_1 indeed. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > Fixes: 08302c35b59d ("drm/vc4: Add DPI driver") > Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com> > Signed-off-by: Maxime Ripard <maxime@cerno.tech> > --- > drivers/gpu/drm/vc4/vc4_dpi.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/vc4/vc4_dpi.c b/drivers/gpu/drm/vc4/vc4_dpi.c > index fdae02760b6d..a7bebfa5d5b0 100644 > --- a/drivers/gpu/drm/vc4/vc4_dpi.c > +++ b/drivers/gpu/drm/vc4/vc4_dpi.c > @@ -185,7 +185,7 @@ static void vc4_dpi_encoder_enable(struct drm_encoder *encoder) > DPI_FORMAT); > break; > case MEDIA_BUS_FMT_RGB565_1X16: > - dpi_c |= VC4_SET_FIELD(DPI_FORMAT_16BIT_565_RGB_3, > + dpi_c |= VC4_SET_FIELD(DPI_FORMAT_16BIT_565_RGB_1, > DPI_FORMAT); > break; > case MEDIA_BUS_FMT_RGB565_1X24_CPADHI: > -- Regards, Laurent Pinchart
next prev parent reply other threads:[~2022-10-15 17:19 UTC|newest] Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-10-13 9:56 [PATCH 0/7] drm/vc4: dpi: Various improvements Maxime Ripard 2022-10-13 9:56 ` Maxime Ripard 2022-10-13 9:56 ` [PATCH 1/7] media: uapi: add MEDIA_BUS_FMT_RGB565_1X24_CPADHI Maxime Ripard 2022-10-13 9:56 ` Maxime Ripard 2022-10-13 9:56 ` [PATCH 2/7] media: uapi: add MEDIA_BUS_FMT_BGR666_1X18 Maxime Ripard 2022-10-13 9:56 ` Maxime Ripard 2022-10-15 17:07 ` Laurent Pinchart 2022-10-15 17:07 ` Laurent Pinchart 2022-10-13 9:56 ` [PATCH 3/7] media: uapi: add MEDIA_BUS_FMT_BGR666_1X24_CPADHI Maxime Ripard 2022-10-13 9:56 ` Maxime Ripard 2022-10-13 9:56 ` [PATCH 4/7] drm/vc4: dpi: Support RGB565 format Maxime Ripard 2022-10-13 9:56 ` Maxime Ripard 2022-10-15 17:29 ` Laurent Pinchart 2022-10-15 17:29 ` Laurent Pinchart 2022-10-17 17:12 ` Dave Stevenson 2022-10-17 17:12 ` Dave Stevenson 2022-10-13 9:56 ` [PATCH 5/7] drm/vc4: dpi: Support BGR666 formats Maxime Ripard 2022-10-13 9:56 ` Maxime Ripard 2022-10-15 17:26 ` Laurent Pinchart 2022-10-15 17:26 ` Laurent Pinchart 2022-10-15 17:30 ` Laurent Pinchart 2022-10-15 17:30 ` Laurent Pinchart 2022-10-17 17:26 ` Dave Stevenson 2022-10-17 17:26 ` Dave Stevenson 2022-10-13 9:56 ` [PATCH 6/7] drm/vc4: dpi: Change the default DPI format to being 18bpp, not 24 Maxime Ripard 2022-10-13 9:56 ` Maxime Ripard 2022-10-15 17:13 ` Laurent Pinchart 2022-10-15 17:13 ` Laurent Pinchart 2022-10-17 17:03 ` Dave Stevenson 2022-10-17 17:03 ` Dave Stevenson 2022-10-13 9:56 ` [PATCH 7/7] drm/vc4: dpi: Fix format mapping for RGB565 Maxime Ripard 2022-10-13 9:56 ` Maxime Ripard 2022-10-15 17:19 ` Laurent Pinchart [this message] 2022-10-15 17:19 ` Laurent Pinchart
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