From: Maxime Jourdan <mjourdan@xxxxxxxxxxxx>
Add helpers to support the lossless framebuffer compression format that
will be used in HEVC & VP9 decoders when decoding 10bit content for
downsampling to 8bit NV12 and later proper compressed buffer support.
Signed-off-by: Maxime Jourdan <mjourdan@xxxxxxxxxxxx>
Signed-off-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
---
.../staging/media/meson/vdec/vdec_helpers.c | 27 +++++++++++++++++++
.../staging/media/meson/vdec/vdec_helpers.h | 4 +++
2 files changed, 31 insertions(+)
diff --git a/drivers/staging/media/meson/vdec/vdec_helpers.c b/drivers/staging/media/meson/vdec/vdec_helpers.c
index 3f7929c54dc6..caec0fb60338 100644
--- a/drivers/staging/media/meson/vdec/vdec_helpers.c
+++ b/drivers/staging/media/meson/vdec/vdec_helpers.c
@@ -50,6 +50,33 @@ void amvdec_write_parser(struct amvdec_core *core, u32 reg, u32 val)
}
EXPORT_SYMBOL_GPL(amvdec_write_parser);
+/* 4 KiB per 64x32 block */
+u32 amvdec_am21c_body_size(u32 width, u32 height)
+{
+ u32 width_64 = ALIGN(width, 64) / 64;
+ u32 height_32 = ALIGN(height, 32) / 32;
+
+ return SZ_4K * width_64 * height_32;
+}
+EXPORT_SYMBOL_GPL(amvdec_am21c_body_size);
+
+/* 32 bytes per 128x64 block */
+u32 amvdec_am21c_head_size(u32 width, u32 height)
+{
+ u32 width_128 = ALIGN(width, 128) / 128;
+ u32 height_64 = ALIGN(height, 64) / 64;
+
+ return 32 * width_128 * height_64;
+}
+EXPORT_SYMBOL_GPL(amvdec_am21c_head_size);
+
+u32 amvdec_am21c_size(u32 width, u32 height)
+{
+ return ALIGN(amvdec_am21c_body_size(width, height) +
+ amvdec_am21c_head_size(width, height), SZ_64K);
+}
+EXPORT_SYMBOL_GPL(amvdec_am21c_size);
+
static int canvas_alloc(struct amvdec_session *sess, u8 *canvas_id)
{
int ret;
diff --git a/drivers/staging/media/meson/vdec/vdec_helpers.h b/drivers/staging/media/meson/vdec/vdec_helpers.h
index 165e6293ffba..cfaed52ab526 100644
--- a/drivers/staging/media/meson/vdec/vdec_helpers.h
+++ b/drivers/staging/media/meson/vdec/vdec_helpers.h
@@ -27,6 +27,10 @@ void amvdec_clear_dos_bits(struct amvdec_core *core, u32 reg, u32 val);
u32 amvdec_read_parser(struct amvdec_core *core, u32 reg);
void amvdec_write_parser(struct amvdec_core *core, u32 reg, u32 val);
+u32 amvdec_am21c_body_size(u32 width, u32 height);
+u32 amvdec_am21c_head_size(u32 width, u32 height);
+u32 amvdec_am21c_size(u32 width, u32 height);
+
/**
* amvdec_dst_buf_done_idx() - Signal that a buffer is done decoding
*
--
2.22.0
