[RFC v3 AFBC 12/12] drm/arm/malidp: Added support for AFBC modifiers for all layers except DE_SMART

[Ayan Halder <Ayan.Halder@arm.com>]

The list of modifiers to be supported for each plane has been dynamically generated
from 'malidp_format_modifiers[]' and 'malidp_hw_regmap->features'.

Changes from v1:-
1. Replaced DRM_ERROR() with DRM_DEBUG_KMS() in malidp_format_mod_supported()
to report unsupported modifiers.

Changes from v2:-
1. Removed malidp_format_mod_supported() from the current patch. This has been added
in "PATCH 7/12"
2. Dynamically generate the list of modifiers (to be supported for each plane) from
'malidp_format_modifiers' and features.

Signed-off-by: Ayan Kumar halder <ayan.halder@arm.com>
---
 drivers/gpu/drm/arm/malidp_drv.c    |  1 +
 drivers/gpu/drm/arm/malidp_planes.c | 28 ++++++++++++++++++++++++++--
 2 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/arm/malidp_drv.c b/drivers/gpu/drm/arm/malidp_drv.c
index b2b97db..be45703 100644
--- a/drivers/gpu/drm/arm/malidp_drv.c
+++ b/drivers/gpu/drm/arm/malidp_drv.c
@@ -388,6 +388,7 @@ 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 eec0442..01037d0 100644
--- a/drivers/gpu/drm/arm/malidp_planes.c
+++ b/drivers/gpu/drm/arm/malidp_planes.c
@@ -934,6 +934,25 @@ int malidp_de_planes_init(struct drm_device *drm)
 				  BIT(DRM_MODE_BLEND_COVERAGE);
 	u32 *formats;
 	int ret, i, j, n;
+	u64 supported_modifiers[MODIFIERS_COUNT_MAX];
+	const u64 *modifiers;
+
+	modifiers = malidp_format_modifiers;
+
+	if (!(map->features & MALIDP_DEVICE_AFBC_SUPPORT_SPLIT)) {
+		/*
+		 * Since our hardware does not support SPLIT, so build the list of
+		 * supported modifiers excluding SPLIT ones.
+		 */
+		while (*modifiers != DRM_FORMAT_MOD_INVALID) {
+			if (!(*modifiers & AFBC_SPLIT))
+				supported_modifiers[j++] = *modifiers;
+
+			modifiers++;
+		}
+		supported_modifiers[j++] = DRM_FORMAT_MOD_INVALID;
+		modifiers = supported_modifiers;
+	}
 
 	formats = kcalloc(map->n_pixel_formats, sizeof(*formats), GFP_KERNEL);
 	if (!formats) {
@@ -958,9 +977,14 @@ 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