[PATCH 3/4] drm/meson: overlay: setup overlay for Amlogic FBC

Neil Armstrong
2020-02-20T16:28:12Z

Setup the Amlogic FBC decoder for the VD1 video overlay plane.

The VD1 Amlogic FBC decoder is integrated in the pipeline like the
YUV pixel reading/formatter but used a direct memory address instead.

The default mode needs to calculate the content body size since the header
is allocated after.

The scatter mode needs a simplier management since only the header is needed,
since it contains an IOMMU scatter table to locate the superblocks in memory.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
drivers/gpu/drm/meson/meson_drv.h | 16 ++
drivers/gpu/drm/meson/meson_overlay.c | 257 +++++++++++++++++++++++++-
2 files changed, 265 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/meson/meson_drv.h b/drivers/gpu/drm/meson/meson_drv.h
index 04fdf3826643..da951964e988 100644
--- a/drivers/gpu/drm/meson/meson_drv.h
+++ b/drivers/gpu/drm/meson/meson_drv.h
@@ -80,6 +80,7 @@ struct meson_drm {

bool vd1_enabled;
bool vd1_commit;
+ bool vd1_afbc;
unsigned int vd1_planes;
uint32_t vd1_if0_gen_reg;
uint32_t vd1_if0_luma_x0;
@@ -105,6 +106,21 @@ struct meson_drm {
uint32_t vd1_height0;
uint32_t vd1_height1;
uint32_t vd1_height2;
+ uint32_t vd1_afbc_mode;
+ uint32_t vd1_afbc_en;
+ uint32_t vd1_afbc_head_addr;
+ uint32_t vd1_afbc_body_addr;
+ uint32_t vd1_afbc_conv_ctrl;
+ uint32_t vd1_afbc_dec_def_color;
+ uint32_t vd1_afbc_vd_cfmt_ctrl;
+ uint32_t vd1_afbc_vd_cfmt_w;
+ uint32_t vd1_afbc_vd_cfmt_h;
+ uint32_t vd1_afbc_mif_hor_scope;
+ uint32_t vd1_afbc_mif_ver_scope;
+ uint32_t vd1_afbc_size_out;
+ uint32_t vd1_afbc_pixel_hor_scope;
+ uint32_t vd1_afbc_pixel_ver_scope;
+ uint32_t vd1_afbc_size_in;
uint32_t vpp_pic_in_height;
uint32_t vpp_postblend_vd1_h_start_end;
uint32_t vpp_postblend_vd1_v_start_end;
diff --git a/drivers/gpu/drm/meson/meson_overlay.c b/drivers/gpu/drm/meson/meson_overlay.c
index 2468b0212d52..1fbb81732e9a 100644
--- a/drivers/gpu/drm/meson/meson_overlay.c
+++ b/drivers/gpu/drm/meson/meson_overlay.c
@@ -5,6 +5,7 @@
* Copyright (C) 2015 Amlogic, Inc. All rights reserved.
*/

+#define DEBUG
#include <linux/bitfield.h>

#include <drm/drm_atomic.h>
@@ -76,6 +77,84 @@
#define VD_REGION24_START(value) FIELD_PREP(GENMASK(11, 0), value)
#define VD_REGION13_END(value) FIELD_PREP(GENMASK(27, 16), value)

+/* AFBC_ENABLE */
+#define AFBC_DEC_ENABLE BIT(8)
+#define AFBC_FRM_START BIT(0)
+
+/* AFBC_MODE */
+#define AFBC_HORZ_SKIP_UV(value) FIELD_PREP(GENMASK(1, 0), value)
+#define AFBC_VERT_SKIP_UV(value) FIELD_PREP(GENMASK(3, 2), value)
+#define AFBC_HORZ_SKIP_Y(value) FIELD_PREP(GENMASK(5, 4), value)
+#define AFBC_VERT_SKIP_Y(value) FIELD_PREP(GENMASK(7, 6), value)
+#define AFBC_COMPBITS_YUV(value) FIELD_PREP(GENMASK(13, 8), value)
+#define AFBC_COMPBITS_8BIT 0
+#define AFBC_COMPBITS_10BIT (2 | (2 << 2) | (2 << 4))
+#define AFBC_BURST_LEN(value) FIELD_PREP(GENMASK(15, 14), value)
+#define AFBC_HOLD_LINE_NUM(value) FIELD_PREP(GENMASK(22, 16), value)
+#define AFBC_MIF_URGENT(value) FIELD_PREP(GENMASK(25, 24), value)
+#define AFBC_REV_MODE(value) FIELD_PREP(GENMASK(27, 26), value)
+#define AFBC_BLK_MEM_MODE BIT(28)
+#define AFBC_SCATTER_MODE BIT(29)
+#define AFBC_SOFT_RESET BIT(31)
+
+/* AFBC_SIZE_IN */
+#define AFBC_HSIZE_IN(value) FIELD_PREP(GENMASK(28, 16), value)
+#define AFBC_VSIZE_IN(value) FIELD_PREP(GENMASK(12, 0), value)
+
+/* AFBC_DEC_DEF_COLOR */
+#define AFBC_DEF_COLOR_Y(value) FIELD_PREP(GENMASK(29, 20), value)
+#define AFBC_DEF_COLOR_U(value) FIELD_PREP(GENMASK(19, 10), value)
+#define AFBC_DEF_COLOR_V(value) FIELD_PREP(GENMASK(9, 0), value)
+
+/* AFBC_CONV_CTRL */
+#define AFBC_CONV_LBUF_LEN(value) FIELD_PREP(GENMASK(11, 0), value)
+
+/* AFBC_LBUF_DEPTH */
+#define AFBC_DEC_LBUF_DEPTH(value) FIELD_PREP(GENMASK(27, 16), value)
+#define AFBC_MIF_LBUF_DEPTH(value) FIELD_PREP(GENMASK(11, 0), value)
+
+/* AFBC_OUT_XSCOPE/AFBC_SIZE_OUT */
+#define AFBC_HSIZE_OUT(value) FIELD_PREP(GENMASK(28, 16), value)
+#define AFBC_VSIZE_OUT(value) FIELD_PREP(GENMASK(12, 0), value)
+#define AFBC_OUT_HORZ_BGN(value) FIELD_PREP(GENMASK(28, 16), value)
+#define AFBC_OUT_HORZ_END(value) FIELD_PREP(GENMASK(12, 0), value)
+
+/* AFBC_OUT_YSCOPE */
+#define AFBC_OUT_VERT_BGN(value) FIELD_PREP(GENMASK(28, 16), value)
+#define AFBC_OUT_VERT_END(value) FIELD_PREP(GENMASK(12, 0), value)
+
+/* AFBC_VD_CFMT_CTRL */
+#define AFBC_HORZ_RPT_PIXEL0 BIT(23)
+#define AFBC_HORZ_Y_C_RATIO(value) FIELD_PREP(GENMASK(22, 21), value)
+#define AFBC_HORZ_FMT_EN BIT(20)
+#define AFBC_VERT_RPT_LINE0 BIT(16)
+#define AFBC_VERT_INITIAL_PHASE(value) FIELD_PREP(GENMASK(11, 8), value)
+#define AFBC_VERT_PHASE_STEP(value) FIELD_PREP(GENMASK(7, 1), value)
+#define AFBC_VERT_FMT_EN BIT(0)
+
+/* AFBC_VD_CFMT_W */
+#define AFBC_VD_V_WIDTH(value) FIELD_PREP(GENMASK(11, 0), value)
+#define AFBC_VD_H_WIDTH(value) FIELD_PREP(GENMASK(27, 16), value)
+
+/* AFBC_MIF_HOR_SCOPE */
+#define AFBC_MIF_BLK_BGN_H(value) FIELD_PREP(GENMASK(25, 16), value)
+#define AFBC_MIF_BLK_END_H(value) FIELD_PREP(GENMASK(9, 0), value)
+
+/* AFBC_MIF_VER_SCOPE */
+#define AFBC_MIF_BLK_BGN_V(value) FIELD_PREP(GENMASK(27, 16), value)
+#define AFBC_MIF_BLK_END_V(value) FIELD_PREP(GENMASK(11, 0), value)
+
+/* AFBC_PIXEL_HOR_SCOPE */
+#define AFBC_DEC_PIXEL_BGN_H(value) FIELD_PREP(GENMASK(28, 16), value)
+#define AFBC_DEC_PIXEL_END_H(value) FIELD_PREP(GENMASK(12, 0), value)
+
+/* AFBC_PIXEL_VER_SCOPE */
+#define AFBC_DEC_PIXEL_BGN_V(value) FIELD_PREP(GENMASK(28, 16), value)
+#define AFBC_DEC_PIXEL_END_V(value) FIELD_PREP(GENMASK(12, 0), value)
+
+/* AFBC_VD_CFMT_H */
+#define AFBC_VD_HEIGHT(value) FIELD_PREP(GENMASK(12, 0), value)
+
struct meson_overlay {
struct drm_plane base;
struct meson_drm *priv;
@@ -157,6 +236,9 @@ static void meson_overlay_setup_scaler_params(struct meson_drm *priv,
unsigned int ratio_x, ratio_y;
int temp_height, temp_width;
unsigned int w_in, h_in;
+ int afbc_left, afbc_right;
+ int afbc_top_src, afbc_bottom_src;
+ int afbc_top, afbc_bottom;
int temp, start, end;

if (!crtc_state) {
@@ -169,7 +251,7 @@ static void meson_overlay_setup_scaler_params(struct meson_drm *priv,

w_in = fixed16_to_int(state->src_w);
h_in = fixed16_to_int(state->src_h);
- crop_top = fixed16_to_int(state->src_x);
+ crop_top = fixed16_to_int(state->src_y);
crop_left = fixed16_to_int(state->src_x);

video_top = state->crtc_y;
@@ -243,6 +325,14 @@ static void meson_overlay_setup_scaler_params(struct meson_drm *priv,
DRM_DEBUG("vsc startp %d endp %d start_lines %d end_lines %d\n",
vsc_startp, vsc_endp, vd_start_lines, vd_end_lines);

+ afbc_top = round_down(vd_start_lines, 4);
+ afbc_bottom = round_up(vd_end_lines + 1, 4);
+ afbc_top_src = 0;
+ afbc_bottom_src = round_up(h_in + 1, 4);
+
+ DRM_DEBUG("afbc top %d (src %d) bottom %d (src %d)\n",
+ afbc_top, afbc_top_src, afbc_bottom, afbc_bottom_src);
+
/* Horizontal */

start = video_left + video_width / 2 - ((w_in << 17) / ratio_x);
@@ -278,6 +368,16 @@ static void meson_overlay_setup_scaler_params(struct meson_drm *priv,
DRM_DEBUG("hsc startp %d endp %d start_lines %d end_lines %d\n",
hsc_startp, hsc_endp, hd_start_lines, hd_end_lines);

+ if (hd_start_lines > 0 || (hd_end_lines < w_in)) {
+ afbc_left = 0;
+ afbc_right = round_up(w_in, 32);
+ } else {
+ afbc_left = round_down(hd_start_lines, 32);
+ afbc_right = round_up(hd_end_lines + 1, 32);
+ }
+
+ DRM_DEBUG("afbc left %d right %d\n", afbc_left, afbc_right);
+
priv->viu.vpp_vsc_start_phase_step = ratio_y << 6;

priv->viu.vpp_vsc_ini_phase = vphase << 8;
@@ -293,6 +393,35 @@ static void meson_overlay_setup_scaler_params(struct meson_drm *priv,
VD_H_WIDTH(hd_end_lines - hd_start_lines + 1) |
VD_V_WIDTH(hd_end_lines/2 - hd_start_lines/2 + 1);

+ priv->viu.vd1_afbc_vd_cfmt_w =
+ AFBC_VD_H_WIDTH(afbc_right - afbc_left) |
+ AFBC_VD_V_WIDTH(afbc_right / 2 - afbc_left / 2);
+
+ priv->viu.vd1_afbc_vd_cfmt_h =
+ AFBC_VD_HEIGHT((afbc_bottom - afbc_top) / 2);
+
+ priv->viu.vd1_afbc_mif_hor_scope = AFBC_MIF_BLK_BGN_H(afbc_left / 32) |
+ AFBC_MIF_BLK_END_H((afbc_right / 32) - 1);
+
+ priv->viu.vd1_afbc_mif_ver_scope = AFBC_MIF_BLK_BGN_V(afbc_top / 4) |
+ AFBC_MIF_BLK_END_H((afbc_bottom / 4) - 1);
+
+ priv->viu.vd1_afbc_size_out =
+ AFBC_HSIZE_OUT(afbc_right - afbc_left) |
+ AFBC_VSIZE_OUT(afbc_bottom - afbc_top);
+
+ priv->viu.vd1_afbc_pixel_hor_scope =
+ AFBC_DEC_PIXEL_BGN_H(hd_start_lines - afbc_left) |
+ AFBC_DEC_PIXEL_END_H(hd_end_lines - afbc_left);
+
+ priv->viu.vd1_afbc_pixel_ver_scope =
+ AFBC_DEC_PIXEL_BGN_V(vd_start_lines - afbc_top) |
+ AFBC_DEC_PIXEL_END_V(vd_end_lines - afbc_top);
+
+ priv->viu.vd1_afbc_size_in =
+ AFBC_HSIZE_IN(afbc_right - afbc_left) |
+ AFBC_VSIZE_IN(afbc_bottom_src - afbc_top_src);
+
priv->viu.vd1_if0_luma_y0 = VD_Y_START(vd_start_lines) |
VD_Y_END(vd_end_lines);

@@ -350,11 +479,63 @@ static void meson_overlay_atomic_update(struct drm_plane *plane,

spin_lock_irqsave(&priv->drm->event_lock, flags);

- priv->viu.vd1_if0_gen_reg = VD_URGENT_CHROMA |
- VD_URGENT_LUMA |
- VD_HOLD_LINES(9) |
- VD_CHRO_RPT_LASTL_CTRL |
- VD_ENABLE;
+ if ((fb->modifier & DRM_FORMAT_MOD_AMLOGIC_FBC(0)) ==
+ DRM_FORMAT_MOD_AMLOGIC_FBC(0)) {
+ priv->viu.vd1_afbc = true;
+
+ priv->viu.vd1_afbc_mode = AFBC_MIF_URGENT(3) |
+ AFBC_HOLD_LINE_NUM(8) |
+ AFBC_BURST_LEN(2);
+
+ if (fb->modifier & DRM_FORMAT_MOD_AMLOGIC_FBC_SCATTER)
+ priv->viu.vd1_afbc_mode |= AFBC_SCATTER_MODE;
+
+ 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);
+
+ priv->viu.vd1_afbc_dec_def_color = AFBC_DEF_COLOR_Y(1023);
+
+ /* 420: horizontal / 2, vertical / 4 */
+ priv->viu.vd1_afbc_vd_cfmt_ctrl = AFBC_HORZ_RPT_PIXEL0 |
+ AFBC_HORZ_Y_C_RATIO(1) |
+ AFBC_HORZ_FMT_EN |
+ AFBC_VERT_RPT_LINE0 |
+ AFBC_VERT_INITIAL_PHASE(12) |
+ AFBC_VERT_PHASE_STEP(8) |
+ AFBC_VERT_FMT_EN;
+
+ switch (fb->format->format) {
+ /* AFBC Only formats */
+ case DRM_FORMAT_YUV420_10BIT:
+ priv->viu.vd1_afbc_mode |=
+ AFBC_COMPBITS_YUV(AFBC_COMPBITS_10BIT);
+ priv->viu.vd1_afbc_dec_def_color |=
+ AFBC_DEF_COLOR_U(512) |
+ AFBC_DEF_COLOR_V(512);
+ break;
+ case DRM_FORMAT_YUV420_8BIT:
+ priv->viu.vd1_afbc_dec_def_color |=
+ AFBC_DEF_COLOR_U(128) |
+ AFBC_DEF_COLOR_V(128);
+ break;
+ }
+
+ priv->viu.vd1_if0_gen_reg = 0;
+ priv->viu.vd1_if0_canvas0 = 0;
+ priv->viu.viu_vd1_fmt_ctrl = 0;
+ } else {
+ priv->viu.vd1_afbc = false;
+
+ priv->viu.vd1_if0_gen_reg = VD_URGENT_CHROMA |
+ VD_URGENT_LUMA |
+ VD_HOLD_LINES(9) |
+ VD_CHRO_RPT_LASTL_CTRL |
+ VD_ENABLE;
+ }

/* Setup scaler params */
meson_overlay_setup_scaler_params(priv, plane, interlace_mode);
@@ -370,6 +551,7 @@ static void meson_overlay_atomic_update(struct drm_plane *plane,
priv->viu.vd1_if0_gen_reg2 = 0;
priv->viu.viu_vd1_fmt_ctrl = 0;

+ /* None will match for AFBC Only formats */
switch (fb->format->format) {
/* TOFIX DRM_FORMAT_RGB888 should be supported */
case DRM_FORMAT_YUYV:
@@ -488,13 +670,42 @@ static void meson_overlay_atomic_update(struct drm_plane *plane,
priv->viu.vd1_stride0 = fb->pitches[0];
priv->viu.vd1_height0 =
drm_format_info_plane_height(fb->format,
- fb->height, 0);
+ fb->height, 0);
DRM_DEBUG("plane 0 addr 0x%x stride %d height %d\n",
priv->viu.vd1_addr0,
priv->viu.vd1_stride0,
priv->viu.vd1_height0);
}

+ if (priv->viu.vd1_afbc) {
+ if (priv->viu.vd1_afbc_mode & AFBC_SCATTER_MODE) {
+ /*
+ * In Scatter mode, the header contains the physical
+ * body content layout, thus the body content
+ * size isn't needed.
+ */
+ priv->viu.vd1_afbc_head_addr = priv->viu.vd1_addr0 >> 4;
+ priv->viu.vd1_afbc_body_addr = 0;
+ } else {
+ /* Default mode is 4k per superblock */
+ unsigned long block_size = 4096;
+ unsigned long body_size;
+
+ /* 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) *
+ block_size;
+
+ priv->viu.vd1_afbc_body_addr = priv->viu.vd1_addr0 >> 4;
+ /* Header is after body content */
+ priv->viu.vd1_afbc_head_addr = (priv->viu.vd1_addr0 +
+ body_size) >> 4;
+ }
+ }
+
priv->viu.vd1_enabled = true;

spin_unlock_irqrestore(&priv->drm->event_lock, flags);
@@ -531,6 +742,23 @@ static const struct drm_plane_helper_funcs meson_overlay_helper_funcs = {
.prepare_fb = drm_gem_fb_prepare_fb,
};

+static bool meson_overlay_format_mod_supported(struct drm_plane *plane,
+ u32 format, u64 modifier)
+{
+ if (modifier == DRM_FORMAT_MOD_LINEAR &&
+ format != DRM_FORMAT_YUV420_8BIT &&
+ format != DRM_FORMAT_YUV420_10BIT)
+ return true;
+
+ if ((modifier & DRM_FORMAT_MOD_AMLOGIC_FBC(0)) ==
+ DRM_FORMAT_MOD_AMLOGIC_FBC(0) &&
+ (format == DRM_FORMAT_YUV420_8BIT ||
+ format == DRM_FORMAT_YUV420_10BIT))
+ return true;
+
+ return false;
+}
+
static const struct drm_plane_funcs meson_overlay_funcs = {
.update_plane = drm_atomic_helper_update_plane,
.disable_plane = drm_atomic_helper_disable_plane,
@@ -538,6 +766,7 @@ static const struct drm_plane_funcs meson_overlay_funcs = {
.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 = meson_overlay_format_mod_supported,
};

static const uint32_t supported_drm_formats[] = {
@@ -549,6 +778,18 @@ static const uint32_t supported_drm_formats[] = {
DRM_FORMAT_YUV420,
DRM_FORMAT_YUV411,
DRM_FORMAT_YUV410,
+ DRM_FORMAT_YUV420_8BIT, /* Amlogic FBC Only */
+ DRM_FORMAT_YUV420_10BIT, /* Amlogic FBC Only */
+};
+
+static const uint64_t format_modifiers[] = {
+ DRM_FORMAT_MOD_AMLOGIC_FBC(DRM_FORMAT_MOD_AMLOGIC_FBC_SCATTER |
+ DRM_FORMAT_MOD_AMLOGIC_FBC_MEM_SAVING),
+ DRM_FORMAT_MOD_AMLOGIC_FBC(DRM_FORMAT_MOD_AMLOGIC_FBC_SCATTER),
+ DRM_FORMAT_MOD_AMLOGIC_FBC(DRM_FORMAT_MOD_AMLOGIC_FBC_MEM_SAVING),
+ DRM_FORMAT_MOD_AMLOGIC_FBC_DEFAULT,
+ DRM_FORMAT_MOD_LINEAR,
+ DRM_FORMAT_MOD_INVALID,
};

int meson_overlay_create(struct meson_drm *priv)
@@ -570,7 +811,7 @@ int meson_overlay_create(struct meson_drm *priv)
&meson_overlay_funcs,
supported_drm_formats,
ARRAY_SIZE(supported_drm_formats),
- NULL,
+ format_modifiers,
DRM_PLANE_TYPE_OVERLAY, "meson_overlay_plane");

drm_plane_helper_add(plane, &meson_overlay_helper_funcs);
--
2.22.0