[PATCH v2 2/3] drm/komeda: Add split support for scaler

From: james qian wang (Arm Technology China)
Date: Mon Jun 10 2019 - 06:20:30 EST

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To achieve same caling effect compare with none split, the texel
calculation need to use the same scaling ratio before split, so add
"total_xxx" to pipeline to describe the hsize/vsize before split.
Update pipeline and d71_scaler_update accordingly.

v2: Rebase and addressed Liviu's comments

Signed-off-by: James Qian Wang (Arm Technology China) <james.qian.wang@xxxxxxx>
---
.../arm/display/komeda/d71/d71_component.c | 47 +++++++++++++++++--
.../drm/arm/display/komeda/komeda_pipeline.h | 19 ++++++--
.../display/komeda/komeda_pipeline_state.c | 18 ++++++-
.../gpu/drm/arm/display/komeda/komeda_plane.c | 11 ++---
.../arm/display/komeda/komeda_wb_connector.c | 2 +-
5 files changed, 80 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c b/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
index 71f58bf1e880..c83b95b33139 100644
--- a/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
+++ b/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
@@ -642,23 +642,58 @@ static void d71_scaler_update(struct komeda_component *c,

malidp_write32(reg, BLK_IN_SIZE, HV_SIZE(st->hsize_in, st->vsize_in));
malidp_write32(reg, SC_OUT_SIZE, HV_SIZE(st->hsize_out, st->vsize_out));
+ malidp_write32(reg, SC_H_CROP, HV_CROP(st->left_crop, st->right_crop));
+
+ /* for right part, HW only sample the valid pixel which means the pixels
+ * in left_crop will be jumpped, and the first sample pixel is:
+ *
+ * dst_a = st->total_hsize_out - st->hsize_out + st->left_crop + 0.5;
+ *
+ * Then the corresponding texel in src is:
+ *
+ * h_delta_phase = st->total_hsize_in / st->total_hsize_out;
+ * src_a = dst_A * h_delta_phase;
+ *
+ * and h_init_phase is src_a deduct the real source start src_S;
+ *
+ * src_S = st->total_hsize_in - st->hsize_in;
+ * h_init_phase = src_a - src_S;
+ *
+ * And HW precision for the initial/delta_phase is 16:16 fixed point,
+ * the following is the simplified formula
+ */
+ if (st->right_part) {
+ u32 dst_a = st->total_hsize_out - st->hsize_out + st->left_crop;
+
+ if (st->en_img_enhancement)
+ dst_a -= 1;
+
+ init_ph = ((st->total_hsize_in * (2 * dst_a + 1) -
+ 2 * st->total_hsize_out * (st->total_hsize_in -
+ st->hsize_in)) << 15) / st->total_hsize_out;
+ } else {
+ init_ph = (st->total_hsize_in << 15) / st->total_hsize_out;
+ }

- init_ph = (st->hsize_in << 15) / st->hsize_out;
malidp_write32(reg, SC_H_INIT_PH, init_ph);

- delta_ph = (st->hsize_in << 16) / st->hsize_out;
+ delta_ph = (st->total_hsize_in << 16) / st->total_hsize_out;
malidp_write32(reg, SC_H_DELTA_PH, delta_ph);

- init_ph = (st->vsize_in << 15) / st->vsize_out;
+ init_ph = (st->total_vsize_in << 15) / st->vsize_out;
malidp_write32(reg, SC_V_INIT_PH, init_ph);

- delta_ph = (st->vsize_in << 16) / st->vsize_out;
+ delta_ph = (st->total_vsize_in << 16) / st->vsize_out;
malidp_write32(reg, SC_V_DELTA_PH, delta_ph);

ctrl = 0;
ctrl |= st->en_scaling ? SC_CTRL_SCL : 0;
ctrl |= st->en_alpha ? SC_CTRL_AP : 0;
ctrl |= st->en_img_enhancement ? SC_CTRL_IENH : 0;
+ /* If we use the hardware splitter we shouldn't set SC_CTRL_LS */
+ if (st->en_split &&
+ state->inputs[0].component->id != KOMEDA_COMPONENT_SPLITTER)
+ ctrl |= SC_CTRL_LS;

malidp_write32(reg, BLK_CONTROL, ctrl);
malidp_write32(reg, BLK_INPUT_ID0, to_d71_input_id(&state->inputs[0]));
@@ -716,10 +751,12 @@ static int d71_scaler_init(struct d71_dev *d71,
}

scaler = to_scaler(c);
- set_range(&scaler->hsize, 4, d71->max_line_size);
+ set_range(&scaler->hsize, 4, 2048);
set_range(&scaler->vsize, 4, 4096);
scaler->max_downscaling = 6;
scaler->max_upscaling = 64;
+ scaler->scaling_split_overlap = 8;
+ scaler->enh_split_overlap = 1;

malidp_write32(c->reg, BLK_CONTROL, 0);

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
index 20e6f7a78d12..857be3f64b32 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
@@ -247,15 +247,22 @@ struct komeda_scaler {
struct malidp_range hsize, vsize;
u32 max_upscaling;
u32 max_downscaling;
+ u8 scaling_split_overlap; /* split overlap for scaling */
+ u8 enh_split_overlap; /* split overlap for image enhancement */
};

struct komeda_scaler_state {
struct komeda_component_state base;
u16 hsize_in, vsize_in;
u16 hsize_out, vsize_out;
+ u16 total_hsize_in, total_vsize_in;
+ u16 total_hsize_out; /* total_xxxx are size before split */
+ u16 left_crop, right_crop;
u8 en_scaling : 1,
en_alpha : 1, /* enable alpha processing */
- en_img_enhancement : 1;
+ en_img_enhancement : 1,
+ en_split : 1,
+ right_part : 1; /* right part of split image */
};

struct komeda_compiz {
@@ -323,11 +330,16 @@ struct komeda_data_flow_cfg {
struct komeda_component_output input;
u16 in_x, in_y, in_w, in_h;
u32 out_x, out_y, out_w, out_h;
+ u16 total_in_h, total_in_w;
+ u16 total_out_w;
+ u16 left_crop, right_crop, overlap;
u32 rot;
int blending_zorder;
u8 pixel_blend_mode, layer_alpha;
u8 en_scaling : 1,
- en_img_enhancement : 1;
+ en_img_enhancement : 1,
+ en_split : 1,
+ right_part : 1; /* right part of display image if split enabled */
};

struct komeda_pipeline_funcs {
@@ -492,6 +504,7 @@ void komeda_pipeline_disable(struct komeda_pipeline *pipe,
void komeda_pipeline_update(struct komeda_pipeline *pipe,
struct drm_atomic_state *old_state);

-void komeda_complete_data_flow_cfg(struct komeda_data_flow_cfg *dflow);
+void komeda_complete_data_flow_cfg(struct komeda_data_flow_cfg *dflow,
+ struct drm_framebuffer *fb);

#endif /* _KOMEDA_PIPELINE_H_*/
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
index 7fb7f725a6de..714961a0f91e 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
@@ -507,11 +507,18 @@ komeda_scaler_validate(void *user,
st->vsize_in = dflow->in_h;
st->hsize_out = dflow->out_w;
st->vsize_out = dflow->out_h;
+ st->right_crop = dflow->right_crop;
+ st->left_crop = dflow->left_crop;
+ st->total_vsize_in = dflow->total_in_h;
+ st->total_hsize_in = dflow->total_in_w;
+ st->total_hsize_out = dflow->total_out_w;

/* Enable alpha processing if the next stage needs the pixel alpha */
st->en_alpha = dflow->pixel_blend_mode != DRM_MODE_BLEND_PIXEL_NONE;
st->en_scaling = dflow->en_scaling;
st->en_img_enhancement = dflow->en_img_enhancement;
+ st->en_split = dflow->en_split;
+ st->right_part = dflow->right_part;

komeda_component_add_input(&st->base, &dflow->input, 0);
komeda_component_set_output(&dflow->input, &scaler->base, 0);
@@ -665,11 +672,20 @@ komeda_timing_ctrlr_validate(struct komeda_timing_ctrlr *ctrlr,
return 0;
}

-void komeda_complete_data_flow_cfg(struct komeda_data_flow_cfg *dflow)
+void komeda_complete_data_flow_cfg(struct komeda_data_flow_cfg *dflow,
+ struct drm_framebuffer *fb)
{
u32 w = dflow->in_w;
u32 h = dflow->in_h;

+ dflow->total_in_w = dflow->in_w;
+ dflow->total_in_h = dflow->in_h;
+ dflow->total_out_w = dflow->out_w;
+
+ /* if format doesn't have alpha, fix blend mode to PIXEL_NONE */
+ if (!fb->format->has_alpha)
+ dflow->pixel_blend_mode = DRM_MODE_BLEND_PIXEL_NONE;
+
if (drm_rotation_90_or_270(dflow->rot))
swap(w, h);

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
index c0e381cee524..9d29820345b9 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
@@ -23,10 +23,7 @@ komeda_plane_init_data_flow(struct drm_plane_state *st,
memset(dflow, 0, sizeof(*dflow));

dflow->blending_zorder = st->normalized_zpos;
-
- /* if format doesn't have alpha, fix blend mode to PIXEL_NONE */
- dflow->pixel_blend_mode = fb->format->has_alpha ?
- st->pixel_blend_mode : DRM_MODE_BLEND_PIXEL_NONE;
+ dflow->pixel_blend_mode = st->pixel_blend_mode;
dflow->layer_alpha = st->alpha >> 8;

dflow->out_x = st->crtc_x;
@@ -39,8 +36,6 @@ komeda_plane_init_data_flow(struct drm_plane_state *st,
dflow->in_w = st->src_w >> 16;
dflow->in_h = st->src_h >> 16;

- dflow->en_img_enhancement = kplane_st->img_enhancement;
-
dflow->rot = drm_rotation_simplify(st->rotation, caps->supported_rots);
if (!has_bits(dflow->rot, caps->supported_rots)) {
DRM_DEBUG_ATOMIC("rotation(0x%x) isn't supported by %s.\n",
@@ -50,7 +45,9 @@ komeda_plane_init_data_flow(struct drm_plane_state *st,
return -EINVAL;
}

- komeda_complete_data_flow_cfg(dflow);
+ dflow->en_img_enhancement = kplane_st->img_enhancement;
+
+ komeda_complete_data_flow_cfg(dflow, fb);

return 0;
}
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c b/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
index eed521218ef3..20295291572f 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
@@ -31,7 +31,7 @@ komeda_wb_init_data_flow(struct komeda_layer *wb_layer,
dflow->pixel_blend_mode = DRM_MODE_BLEND_PIXEL_NONE;
dflow->rot = DRM_MODE_ROTATE_0;

- komeda_complete_data_flow_cfg(dflow);
+ komeda_complete_data_flow_cfg(dflow, fb);

return 0;
}
--
2.17.1

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