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Message-ID: <20180705162056.GA18005@arm.com>
Date: Thu, 5 Jul 2018 17:20:56 +0100
From: Ayan Halder <ayan.halder@....com>
To: liviu.dudau@....com, brian.starkey@....com, malidp@...s.arm.com,
airlied@...ux.ie, dri-devel@...ts.freedesktop.org,
linux-kernel@...r.kernel.org, nd@....com
Subject: Re: [RFC PATCH v2] drm/arm/malidp: Added support for AFBC modifiers
for all layers except DE_SMART
On Thu, Jul 05, 2018 at 05:48:22PM +0200, Daniel Vetter wrote:
> On Thu, Jul 05, 2018 at 03:25:43PM +0100, Ayan Kumar Halder wrote:
> > On planes which support AFBC, expose an AFBC modifier for use with BGR888.
> >
> > Signed-off-by: Ayan Kumar halder <ayan.halder@....com>
> > Reviewed-by: Brian Starkey <brian.starkey@....com>
> > Reviewed-by: Liviu Dudau <liviu.dudau@....com>
> >
> > Changes from v2:
> > - Removed the gerrit change-id
> > - Replaced DRM_ERROR() with DRM_DEBUG_KMS() in malidp_format_mod_supported()
> > to report unsupported modifiers.
> > ---
> > drivers/gpu/drm/arm/malidp_drv.c | 1 +
> > drivers/gpu/drm/arm/malidp_planes.c | 46 +++++++++++++++++++++++++++++++++++--
> > 2 files changed, 45 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/arm/malidp_drv.c b/drivers/gpu/drm/arm/malidp_drv.c
> > index 7b6a848..7bcd679 100644
> > --- a/drivers/gpu/drm/arm/malidp_drv.c
> > +++ b/drivers/gpu/drm/arm/malidp_drv.c
> > @@ -392,6 +392,7 @@ static int malidp_init(struct drm_device *drm)
> > drm->mode_config.max_height = hwdev->max_line_size;
> > drm->mode_config.funcs = &malidp_mode_config_funcs;
> > drm->mode_config.helper_private = &malidp_mode_config_helpers;
> > + drm->mode_config.allow_fb_modifiers = true;
> >
> > ret = malidp_crtc_init(drm);
> > if (ret) {
> > diff --git a/drivers/gpu/drm/arm/malidp_planes.c b/drivers/gpu/drm/arm/malidp_planes.c
> > index 3950504..914cc58 100644
> > --- a/drivers/gpu/drm/arm/malidp_planes.c
> > +++ b/drivers/gpu/drm/arm/malidp_planes.c
> > @@ -124,6 +124,35 @@ static void malidp_plane_atomic_print_state(struct drm_printer *p,
> > drm_printf(p, "\tn_planes=%u\n", ms->n_planes);
> > }
> >
> > +static bool malidp_format_mod_supported(struct drm_plane *plane,
> > + u32 format, u64 modifier)
> > +{
> > + if (WARN_ON(modifier == DRM_FORMAT_MOD_INVALID))
> > + return false;
> > +
> > + /* All the pixel formats are supported without any modifier */
> > + if (modifier == DRM_FORMAT_MOD_LINEAR)
> > + return true;
> > +
> > + if ((modifier >> 56) != DRM_FORMAT_MOD_VENDOR_ARM)
> > + return false;
> > +
> > + if (modifier &
> > + ~DRM_FORMAT_MOD_ARM_AFBC(AFBC_MOD_VALID_BITS)) {
> > + DRM_DEBUG_KMS("Unsupported modifiers\n");
> > + return false;
> > + }
>
> I think the core checks for that by now, or at least Ville had some
> patches to make that happen ...
Can you paste the link (or atleast the title) of the patches that you
are referring to ? I might then have to rework on this.
> I also don't see the ARM_AFBC modifier in upstream yet, is that still
> in-flight somewhere?
I realized that I was missing the ack on my first patch of the series
(ie
https://lists.freedesktop.org/archives/dri-devel/2018-June/180125.html)
and the reason I believe is that I did not put the correct email
addresses in "--to" for the drm_fourcc.h maintainers. I will resend the
patch and wait for their ack.
> -Daniel
>
> > +
> > + switch (modifier) {
> > + case DRM_FORMAT_MOD_ARM_AFBC(AFBC_FORMAT_MOD_BLOCK_SIZE_16x16 |
> > + AFBC_FORMAT_MOD_YTR |
> > + AFBC_FORMAT_MOD_SPARSE):
> > + if (format == DRM_FORMAT_BGR888)
> > + return true;
> > + }
> > + return false;
> > +}
> > +
> > static const struct drm_plane_funcs malidp_de_plane_funcs = {
> > .update_plane = drm_atomic_helper_update_plane,
> > .disable_plane = drm_atomic_helper_disable_plane,
> > @@ -132,6 +161,7 @@ static const struct drm_plane_funcs malidp_de_plane_funcs = {
> > .atomic_duplicate_state = malidp_duplicate_plane_state,
> > .atomic_destroy_state = malidp_destroy_plane_state,
> > .atomic_print_state = malidp_plane_atomic_print_state,
> > + .format_mod_supported = malidp_format_mod_supported,
> > };
> >
> > static int malidp_se_check_scaling(struct malidp_plane *mp,
> > @@ -524,6 +554,13 @@ int malidp_de_planes_init(struct drm_device *drm)
> > u32 *formats;
> > int ret, i, j, n;
> >
> > + static const u64 modifiers[] = {
> > + DRM_FORMAT_MOD_ARM_AFBC(AFBC_FORMAT_MOD_BLOCK_SIZE_16x16 |
> > + AFBC_FORMAT_MOD_YTR | AFBC_FORMAT_MOD_SPARSE),
> > + DRM_FORMAT_MOD_LINEAR,
> > + DRM_FORMAT_MOD_INVALID
> > + };
> > +
> > formats = kcalloc(map->n_pixel_formats, sizeof(*formats), GFP_KERNEL);
> > if (!formats) {
> > ret = -ENOMEM;
> > @@ -547,9 +584,14 @@ int malidp_de_planes_init(struct drm_device *drm)
> >
> > plane_type = (i == 0) ? DRM_PLANE_TYPE_PRIMARY :
> > DRM_PLANE_TYPE_OVERLAY;
> > +
> > + /*
> > + * All the layers except smart layer supports AFBC modifiers.
> > + */
> > ret = drm_universal_plane_init(drm, &plane->base, crtcs,
> > - &malidp_de_plane_funcs, formats,
> > - n, NULL, plane_type, NULL);
> > + &malidp_de_plane_funcs, formats, n,
> > + (id == DE_SMART) ? NULL : modifiers, plane_type, NULL);
> > +
> > if (ret < 0)
> > goto cleanup;
> >
> > --
> > 2.7.4
> >
> > _______________________________________________
> > dri-devel mailing list
> > dri-devel@...ts.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/dri-devel
>
> --
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch
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