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Subject[PATCH v4 6/8] drm/meson: overlay: setup overlay for Amlogic FBC Memory Saving mode
Date
Setup the Amlogic FBC decoder for the VD1 video overlay plane to use
a different superblock size for the Memory Saving mode.

Tested-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
drivers/gpu/drm/meson/meson_overlay.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/meson/meson_overlay.c b/drivers/gpu/drm/meson/meson_overlay.c
index 51fa038ad5d7..8b9d4984b2a7 100644
--- a/drivers/gpu/drm/meson/meson_overlay.c
+++ b/drivers/gpu/drm/meson/meson_overlay.c
@@ -487,6 +487,9 @@ static void meson_overlay_atomic_update(struct drm_plane *plane,
AFBC_HOLD_LINE_NUM(8) |
AFBC_BURST_LEN(2);

+ if (fb->modifier & DRM_FORMAT_MOD_AMLOGIC_FBC_MEM_SAVING)
+ priv->viu.vd1_afbc_mode |= AFBC_BLK_MEM_MODE;
+
priv->viu.vd1_afbc_en = 0x1600 | AFBC_DEC_ENABLE;

priv->viu.vd1_afbc_conv_ctrl = AFBC_CONV_LBUF_LEN(256);
@@ -672,12 +675,17 @@ static void meson_overlay_atomic_update(struct drm_plane *plane,
}

if (priv->viu.vd1_afbc) {
+ /* Default mode is 4k per superblock */
+ unsigned long block_size = 4096;
unsigned long body_size;

- /* Default mode is 4k per superblock */
+ /* 8bit mem saving mode is 3072bytes per superblock */
+ if (priv->viu.vd1_afbc_mode & AFBC_BLK_MEM_MODE)
+ block_size = 3072;
+
body_size = (ALIGN(priv->viu.vd1_stride0, 64) / 64) *
(ALIGN(priv->viu.vd1_height0, 32) / 32) *
- 4096;
+ block_size;

priv->viu.vd1_afbc_body_addr = priv->viu.vd1_addr0 >> 4;

@@ -763,6 +771,8 @@ static const uint32_t supported_drm_formats[] = {
};

static const uint64_t format_modifiers[] = {
+ DRM_FORMAT_MOD_AMLOGIC_FBC(DRM_FORMAT_MOD_AMLOGIC_FBC_LAYOUT_BASIC |
+ DRM_FORMAT_MOD_AMLOGIC_FBC_MEM_SAVING),
DRM_FORMAT_MOD_AMLOGIC_FBC(DRM_FORMAT_MOD_AMLOGIC_FBC_LAYOUT_BASIC),
DRM_FORMAT_MOD_LINEAR,
DRM_FORMAT_MOD_INVALID,
--
2.22.0
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