diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0235-drm-vc4-Expose-the-format-modifiers-for-firmware-kms.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0235-drm-vc4-Expose-the-format-modifiers-for-firmware-kms.patch | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0235-drm-vc4-Expose-the-format-modifiers-for-firmware-kms.patch b/target/linux/bcm27xx/patches-5.4/950-0235-drm-vc4-Expose-the-format-modifiers-for-firmware-kms.patch new file mode 100644 index 0000000000..cb5b6d5aa7 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0235-drm-vc4-Expose-the-format-modifiers-for-firmware-kms.patch @@ -0,0 +1,80 @@ +From c27d4bbba9593a6ded8f482610a0247da66d78a9 Mon Sep 17 00:00:00 2001 +From: Eric Anholt <eric@anholt.net> +Date: Mon, 18 Mar 2019 16:38:32 -0700 +Subject: [PATCH] drm/vc4: Expose the format modifiers for firmware + kms. + +This should technically not expose VC4_T_TILED on pi4. However, if we +don't expose anything, then userspace will assume that display can +handle whatever modifiers 3d can do (UIF on 2711). By exposing a +list, that will get intersected with what 3D can do so that we get T +tiling for display on 2710 and linear on 2711. + +Signed-off-by: Eric Anholt <eric@anholt.net> +--- + drivers/gpu/drm/vc4/vc4_firmware_kms.c | 33 +++++++++++++++++++++++++- + 1 file changed, 32 insertions(+), 1 deletion(-) + +--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c ++++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c +@@ -281,6 +281,27 @@ static void vc4_plane_destroy(struct drm + drm_plane_cleanup(plane); + } + ++static bool vc4_fkms_format_mod_supported(struct drm_plane *plane, ++ uint32_t format, ++ uint64_t modifier) ++{ ++ /* Support T_TILING for RGB formats only. */ ++ switch (format) { ++ case DRM_FORMAT_XRGB8888: ++ case DRM_FORMAT_ARGB8888: ++ switch (modifier) { ++ case DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED: ++ case DRM_FORMAT_MOD_LINEAR: ++ case DRM_FORMAT_MOD_BROADCOM_UIF: ++ return true; ++ default: ++ return false; ++ } ++ default: ++ return false; ++ } ++} ++ + static const struct drm_plane_funcs vc4_plane_funcs = { + .update_plane = drm_atomic_helper_update_plane, + .disable_plane = drm_atomic_helper_disable_plane, +@@ -289,6 +310,7 @@ static const struct drm_plane_funcs vc4_ + .reset = drm_atomic_helper_plane_reset, + .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_plane_destroy_state, ++ .format_mod_supported = vc4_fkms_format_mod_supported, + }; + + static const struct drm_plane_helper_funcs vc4_primary_plane_helper_funcs = { +@@ -316,6 +338,14 @@ static struct drm_plane *vc4_fkms_plane_ + u32 argb8888 = DRM_FORMAT_ARGB8888; + int ret = 0; + bool primary = (type == DRM_PLANE_TYPE_PRIMARY); ++ static const uint64_t modifiers[] = { ++ DRM_FORMAT_MOD_LINEAR, ++ /* VC4_T_TILED should come after linear, because we ++ * would prefer to scan out linear (less bus traffic). ++ */ ++ DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED, ++ DRM_FORMAT_MOD_INVALID, ++ }; + + vc4_plane = devm_kzalloc(dev->dev, sizeof(*vc4_plane), + GFP_KERNEL); +@@ -327,7 +357,8 @@ static struct drm_plane *vc4_fkms_plane_ + plane = &vc4_plane->base; + ret = drm_universal_plane_init(dev, plane, 0xff, + &vc4_plane_funcs, +- primary ? &xrgb8888 : &argb8888, 1, NULL, ++ primary ? &xrgb8888 : &argb8888, 1, ++ modifiers, + type, primary ? "primary" : "cursor"); + + if (type == DRM_PLANE_TYPE_PRIMARY) { |