> -----Original Message-----
> From: Murthy, Arun R <arun.r.mur...@intel.com>
> Sent: Wednesday, March 12, 2025 6:39 PM
> To: dri-devel@lists.freedesktop.org; intel-...@lists.freedesktop.org; intel-
> x...@lists.freedesktop.org
> Cc: Borah, Chaitanya Kumar <chaitanya.kumar.bo...@intel.com>;
> 20250219093211.4059187-1-arun.r.mur...@intel.com;
> 20250311085422.2573860-1-santhosh.reddy.gudd...@intel.com; Murthy,
> Arun R <arun.r.mur...@intel.com>
> Subject: [PATCH v8 3/3] drm/i915/display: Add i915 hook for
> format_mod_supported_async
>
> Hook up the newly added plane function pointer
> format_mod_supported_async to populate the modifiers/formats supported
> by asynchronous flips.
>
> v5: Correct the if condition for modifier support check (Chaitanya)
> v6: Replace uint32_t/uint64_t with u32/u64 (Jani)
> v7: Move plannar check from intel_async_flip_check_hw() to
> intel_plane_format_mod_supported_async() (Ville)
> v8: In case of error print format/modifier (Chaitanya
Nit: Closing brackets and also the null check for the hook.
Otherwise, LGTM
Reviewed-by: Chaitanya Kumar Borah <chaitanya.kumar.bo...@intel.com>
>
> Signed-off-by: Arun R Murthy <arun.r.mur...@intel.com>
> ---
> drivers/gpu/drm/i915/display/i9xx_plane.c | 6 +++--
> drivers/gpu/drm/i915/display/intel_atomic_plane.c | 31
> +++++++++++++++++++++-
> drivers/gpu/drm/i915/display/intel_atomic_plane.h | 6 ++++-
> drivers/gpu/drm/i915/display/intel_display.c | 14 +++-------
> drivers/gpu/drm/i915/display/skl_universal_plane.c | 5 +++-
> 5 files changed, 47 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/i9xx_plane.c
> b/drivers/gpu/drm/i915/display/i9xx_plane.c
> index
> 013295f66d56ec5e919b3a0c904034bf7985986a..6bd09adb8a30ba002ef3
> 34261d7638f398587a3e 100644
> --- a/drivers/gpu/drm/i915/display/i9xx_plane.c
> +++ b/drivers/gpu/drm/i915/display/i9xx_plane.c
> @@ -820,7 +820,7 @@ unsigned int vlv_plane_min_alignment(struct
> intel_plane *plane, {
> struct intel_display *display = to_intel_display(plane);
>
> - if (intel_plane_can_async_flip(plane, fb->modifier))
> + if (intel_plane_can_async_flip(plane, fb->format->format,
> +fb->modifier))
> return 256 * 1024;
>
> /* FIXME undocumented so not sure what's actually needed */ @@ -
> 844,7 +844,7 @@ static unsigned int g4x_primary_min_alignment(struct
> intel_plane *plane, {
> struct intel_display *display = to_intel_display(plane);
>
> - if (intel_plane_can_async_flip(plane, fb->modifier))
> + if (intel_plane_can_async_flip(plane, fb->format->format,
> +fb->modifier))
> return 256 * 1024;
>
> if (intel_scanout_needs_vtd_wa(display))
> @@ -889,6 +889,7 @@ static const struct drm_plane_funcs
> i965_plane_funcs = {
> .atomic_duplicate_state = intel_plane_duplicate_state,
> .atomic_destroy_state = intel_plane_destroy_state,
> .format_mod_supported = i965_plane_format_mod_supported,
> + .format_mod_supported_async =
> intel_plane_format_mod_supported_async,
> };
>
> static const struct drm_plane_funcs i8xx_plane_funcs = { @@ -898,6 +899,7
> @@ static const struct drm_plane_funcs i8xx_plane_funcs = {
> .atomic_duplicate_state = intel_plane_duplicate_state,
> .atomic_destroy_state = intel_plane_destroy_state,
> .format_mod_supported = i8xx_plane_format_mod_supported,
> + .format_mod_supported_async =
> intel_plane_format_mod_supported_async,
> };
>
> struct intel_plane *
> diff --git a/drivers/gpu/drm/i915/display/intel_atomic_plane.c
> b/drivers/gpu/drm/i915/display/intel_atomic_plane.c
> index
> 7276179df878658b7053fe6d8dc37b69f19625e3..a2424f6215fe51ed3238c
> f2b51f11e14e8b4d211 100644
> --- a/drivers/gpu/drm/i915/display/intel_atomic_plane.c
> +++ b/drivers/gpu/drm/i915/display/intel_atomic_plane.c
> @@ -174,11 +174,40 @@ bool intel_plane_needs_physical(struct intel_plane
> *plane)
> DISPLAY_INFO(display)->cursor_needs_physical;
> }
>
> -bool intel_plane_can_async_flip(struct intel_plane *plane, u64 modifier)
> +bool intel_plane_can_async_flip(struct intel_plane *plane, u32 format,
> + u64 modifier)
> {
> + struct intel_display *display = to_intel_display(plane);
> +
> + if (DISPLAY_VER(display) <= 14 ?
> + drm_format_info(format)->is_yuv :
> + intel_format_info_is_yuv_semiplanar(drm_format_info(format),
> + modifier)) {
> + drm_dbg_kms(plane->base.dev,
> + "[PLANE:%d:%s] Planar formats do not support
> async flips\n",
> + plane->base.base.id, plane->base.name);
> + return false;
> + }
> +
> return plane->can_async_flip && plane->can_async_flip(modifier); }
>
> +bool intel_plane_format_mod_supported_async(struct drm_plane *plane,
> + u32 format,
> + u64 modifier)
> +{
> + if (plane->funcs->format_mod_supported &&
> + !plane->funcs->format_mod_supported(plane, format, modifier)) {
> + drm_dbg_kms(plane->dev,
> + "[PLANE:%d:%s](format %p4cc) modifier 0x%llx not
> in universal list\n",
> + plane->base.id, plane->name, &format, modifier);
> + return false;
> + }
> +
> + return intel_plane_can_async_flip(to_intel_plane(plane),
> + format, modifier);
> +}
> +
> unsigned int intel_adjusted_rate(const struct drm_rect *src,
> const struct drm_rect *dst,
> unsigned int rate)
> diff --git a/drivers/gpu/drm/i915/display/intel_atomic_plane.h
> b/drivers/gpu/drm/i915/display/intel_atomic_plane.h
> index
> 6efac923dcbc757e6f68564cbef2919c920f13cb..512c251cc153753a4808cf
> 177c8bcce2178bb862 100644
> --- a/drivers/gpu/drm/i915/display/intel_atomic_plane.h
> +++ b/drivers/gpu/drm/i915/display/intel_atomic_plane.h
> @@ -21,7 +21,8 @@ enum plane_id;
>
> struct intel_plane *
> intel_crtc_get_plane(struct intel_crtc *crtc, enum plane_id plane_id); -bool
> intel_plane_can_async_flip(struct intel_plane *plane, u64 modifier);
> +bool intel_plane_can_async_flip(struct intel_plane *plane, u32 format,
> + u64 modifier);
> unsigned int intel_adjusted_rate(const struct drm_rect *src,
> const struct drm_rect *dst,
> unsigned int rate);
> @@ -87,6 +88,9 @@ void intel_plane_init_cursor_vblank_work(struct
> intel_plane_state *old_plane_sta int intel_atomic_add_affected_planes(struct
> intel_atomic_state *state,
> struct intel_crtc *crtc);
> int intel_atomic_check_planes(struct intel_atomic_state *state);
> +bool intel_plane_format_mod_supported_async(struct drm_plane *plane,
> + u32 format,
> + u64 modifier);
>
> u32 intel_plane_ggtt_offset(const struct intel_plane_state *plane_state);
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> b/drivers/gpu/drm/i915/display/intel_display.c
> index
> 3afb85fe8536dfffd55dbaa07f6727112cc876b7..5d0bab1f8ff8294716ca584
> 3c856032d2b9ccd5b 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -6005,22 +6005,16 @@ static int intel_async_flip_check_hw(struct
> intel_atomic_state *state, struct in
> if (!plane->async_flip)
> continue;
>
> - if (!intel_plane_can_async_flip(plane, new_plane_state-
> >hw.fb->modifier)) {
> + if (!intel_plane_can_async_flip(plane, new_plane_state-
> >hw.fb->format->format,
> + new_plane_state->hw.fb-
> >modifier)) {
> drm_dbg_kms(display->drm,
> - "[PLANE:%d:%s] Modifier 0x%llx does not
> support async flip\n",
> + "[PLANE:%d:%s] Format %p4cc Modifier
> 0x%llx does not support
> +async flip\n",
> plane->base.base.id, plane->base.name,
> + &new_plane_state->hw.fb->format-
> >format,
> new_plane_state->hw.fb->modifier);
> return -EINVAL;
> }
>
> - if (intel_format_info_is_yuv_semiplanar(new_plane_state-
> >hw.fb->format,
> - new_plane_state-
> >hw.fb->modifier)) {
> - drm_dbg_kms(display->drm,
> - "[PLANE:%d:%s] Planar formats do not
> support async flips\n",
> - plane->base.base.id, plane->base.name);
> - return -EINVAL;
> - }
> -
> /*
> * We turn the first async flip request into a sync flip
> * so that we can reconfigure the plane (eg. change modifier).
> diff --git a/drivers/gpu/drm/i915/display/skl_universal_plane.c
> b/drivers/gpu/drm/i915/display/skl_universal_plane.c
> index
> 70e550539bb21393c7173c7b3904e7790eab25f4..f61e1eff30bb4820ccb17
> daa5d4b2b073a5d4078 100644
> --- a/drivers/gpu/drm/i915/display/skl_universal_plane.c
> +++ b/drivers/gpu/drm/i915/display/skl_universal_plane.c
> @@ -601,7 +601,7 @@ static u32 tgl_plane_min_alignment(struct
> intel_plane *plane,
> * Figure out what's going on here...
> */
> if (display->platform.alderlake_p &&
> - intel_plane_can_async_flip(plane, fb->modifier))
> + intel_plane_can_async_flip(plane, fb->format->format,
> +fb->modifier))
> return mult * 16 * 1024;
>
> switch (fb->modifier) {
> @@ -2666,6 +2666,7 @@ static const struct drm_plane_funcs
> skl_plane_funcs = {
> .atomic_duplicate_state = intel_plane_duplicate_state,
> .atomic_destroy_state = intel_plane_destroy_state,
> .format_mod_supported = skl_plane_format_mod_supported,
> + .format_mod_supported_async =
> intel_plane_format_mod_supported_async,
> };
>
> static const struct drm_plane_funcs icl_plane_funcs = { @@ -2675,6 +2676,7
> @@ static const struct drm_plane_funcs icl_plane_funcs = {
> .atomic_duplicate_state = intel_plane_duplicate_state,
> .atomic_destroy_state = intel_plane_destroy_state,
> .format_mod_supported = icl_plane_format_mod_supported,
> + .format_mod_supported_async =
> intel_plane_format_mod_supported_async,
> };
>
> static const struct drm_plane_funcs tgl_plane_funcs = { @@ -2684,6 +2686,7
> @@ static const struct drm_plane_funcs tgl_plane_funcs = {
> .atomic_duplicate_state = intel_plane_duplicate_state,
> .atomic_destroy_state = intel_plane_destroy_state,
> .format_mod_supported = tgl_plane_format_mod_supported,
> + .format_mod_supported_async =
> intel_plane_format_mod_supported_async,
> };
>
> static void
>
> --
> 2.25.1
