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Subject[PATCH v1 1/2] drm/komeda: Add line size support
Date
On D71, we are using the global line size. From D32, every
component have a line size register to indicate the fifo size.

So this patch is to set line size support and do the line size
check.

Signed-off-by: Lowry Li (Arm Technology China) <lowry.li@arm.com>
---
.../arm/display/komeda/d71/d71_component.c | 56 ++++++++++++++++---
.../gpu/drm/arm/display/komeda/d71/d71_regs.h | 8 +--
.../drm/arm/display/komeda/komeda_pipeline.h | 2 +
.../display/komeda/komeda_pipeline_state.c | 17 ++++++
4 files changed, 68 insertions(+), 15 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 c985932954cb..a56dc56a72fb 100644
--- a/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
+++ b/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
@@ -116,6 +116,23 @@ static void dump_block_header(struct seq_file *sf, void __iomem *reg)
i, hdr.output_ids[i]);
}

+/* On D71, we are using the global line size. From D32, every component have
+ * a line size register to indicate the fifo size.
+ */
+static u32 __get_blk_line_size(struct d71_dev *d71, u32 __iomem *reg,
+ u32 max_default)
+{
+ if (!d71->periph_addr)
+ max_default = malidp_read32(reg, BLK_MAX_LINE_SIZE);
+
+ return max_default;
+}
+
+static u32 get_blk_line_size(struct d71_dev *d71, u32 __iomem *reg)
+{
+ return __get_blk_line_size(d71, reg, d71->max_line_size);
+}
+
static u32 to_rot_ctrl(u32 rot)
{
u32 lr_ctrl = 0;
@@ -423,7 +440,27 @@ static int d71_layer_init(struct d71_dev *d71,
layer->color_mgr.fgamma_mgr = d71->glb_lt_mgr;
}

- set_range(&layer->hsize_in, 4, d71->max_line_size);
+ if (!d71->periph_addr) {
+ /* D32 or newer product */
+ layer->line_sz = malidp_read32(reg, BLK_MAX_LINE_SIZE);
+ layer->yuv_line_sz = L_INFO_YUV_MAX_LINESZ(layer_info);
+ } else if (d71->max_line_size > 2048) {
+ /* D71 4K */
+ layer->line_sz = d71->max_line_size;
+ layer->yuv_line_sz = layer->line_sz / 2;
+ } else {
+ /* D71 2K */
+ if (layer->layer_type == KOMEDA_FMT_RICH_LAYER) {
+ /* rich layer is 4K configuration */
+ layer->line_sz = d71->max_line_size * 2;
+ layer->yuv_line_sz = layer->line_sz / 2;
+ } else {
+ layer->line_sz = d71->max_line_size;
+ layer->yuv_line_sz = 0;
+ }
+ }
+
+ set_range(&layer->hsize_in, 4, layer->line_sz);
set_range(&layer->vsize_in, 4, d71->max_vsize);

malidp_write32(reg, LAYER_PALPHA, D71_PALPHA_DEF_MAP);
@@ -676,9 +713,11 @@ static int d71_wb_layer_init(struct d71_dev *d71,

wb_layer = to_layer(c);
wb_layer->layer_type = KOMEDA_FMT_WB_LAYER;
+ wb_layer->line_sz = get_blk_line_size(d71, reg);
+ wb_layer->yuv_line_sz = wb_layer->line_sz;

- set_range(&wb_layer->hsize_in, D71_MIN_LINE_SIZE, d71->max_line_size);
- set_range(&wb_layer->vsize_in, D71_MIN_VERTICAL_SIZE, d71->max_vsize);
+ set_range(&wb_layer->hsize_in, 64, wb_layer->line_sz);
+ set_range(&wb_layer->vsize_in, 64, d71->max_vsize);

return 0;
}
@@ -822,8 +861,8 @@ static int d71_compiz_init(struct d71_dev *d71,
if (komeda_product_match(d71->mdev, MALIDP_D77_PRODUCT_ID))
compiz->support_channel_scaling = true;

- set_range(&compiz->hsize, D71_MIN_LINE_SIZE, d71->max_line_size);
- set_range(&compiz->vsize, D71_MIN_VERTICAL_SIZE, d71->max_vsize);
+ set_range(&compiz->hsize, 64, get_blk_line_size(d71, reg));
+ set_range(&compiz->vsize, 64, d71->max_vsize);

return 0;
}
@@ -980,7 +1019,7 @@ static int d71_scaler_init(struct d71_dev *d71,
}

scaler = to_scaler(c);
- set_range(&scaler->hsize, 4, 2048);
+ set_range(&scaler->hsize, 4, __get_blk_line_size(d71, reg, 2048));
set_range(&scaler->vsize, 4, 4096);
scaler->max_downscaling = 6;
scaler->max_upscaling = 64;
@@ -1089,7 +1128,7 @@ static int d71_splitter_init(struct d71_dev *d71,

splitter = to_splitter(c);

- set_range(&splitter->hsize, 4, d71->max_line_size);
+ set_range(&splitter->hsize, 4, get_blk_line_size(d71, reg));
set_range(&splitter->vsize, 4, d71->max_vsize);

return 0;
@@ -1240,7 +1279,8 @@ static int d71_merger_init(struct d71_dev *d71,

merger = to_merger(c);

- set_range(&merger->hsize_merged, 4, 4032);
+ set_range(&merger->hsize_merged, 4,
+ __get_blk_line_size(d71, reg, 4032));
set_range(&merger->vsize_merged, 4, 4096);

return 0;
diff --git a/drivers/gpu/drm/arm/display/komeda/d71/d71_regs.h b/drivers/gpu/drm/arm/display/komeda/d71/d71_regs.h
index c1be4594bc92..a58389e623bb 100644
--- a/drivers/gpu/drm/arm/display/komeda/d71/d71_regs.h
+++ b/drivers/gpu/drm/arm/display/komeda/d71/d71_regs.h
@@ -340,6 +340,7 @@
#define L_INFO_RF BIT(0)
#define L_INFO_CM BIT(1)
#define L_INFO_ABUF_SIZE(x) (((x) >> 4) & 0x7)
+#define L_INFO_YUV_MAX_LINESZ(x) (((x) >> 16) & 0xFFFF)

/* Scaler registers */
#define SC_COEFFTAB 0x0DC
@@ -570,13 +571,6 @@ enum d71_blk_type {
#define D71_DEFAULT_PREPRETCH_LINE 5
#define D71_BUS_WIDTH_16_BYTES 16

-#define D71_MIN_LINE_SIZE 64
-#define D71_MIN_VERTICAL_SIZE 64
-#define D71_SC_MIN_LIN_SIZE 4
-#define D71_SC_MIN_VERTICAL_SIZE 4
-#define D71_SC_MAX_LIN_SIZE 2048
-#define D71_SC_MAX_VERTICAL_SIZE 4096
-
#define D71_SC_MAX_UPSCALING 64
#define D71_SC_MAX_DOWNSCALING 6
#define D71_SC_SPLIT_OVERLAP 8
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
index 9fe5624172ee..31d392389566 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
@@ -246,6 +246,8 @@ struct komeda_layer {
struct malidp_range hsize_in, vsize_in;
struct komeda_color_manager color_mgr;
u32 layer_type; /* RICH, SIMPLE or WB */
+ u32 line_sz;
+ u32 yuv_line_sz; /* maximum line size for YUV422 and YUV420 */
u32 supported_rots;
/* komeda supports layer split which splits a whole image to two parts
* left and right and handle them by two individual layer processors
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 6974c4e081bf..957c1c01ca78 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
@@ -323,6 +323,7 @@ komeda_layer_check_cfg(struct komeda_layer *layer,
struct komeda_data_flow_cfg *dflow)
{
u32 src_x, src_y, src_w, src_h;
+ u32 line_sz, max_line_sz;

if (!komeda_fb_is_layer_supported(kfb, layer->layer_type, dflow->rot))
return -EINVAL;
@@ -352,6 +353,22 @@ komeda_layer_check_cfg(struct komeda_layer *layer,
return -EINVAL;
}

+ if (drm_rotation_90_or_270(dflow->rot))
+ line_sz = dflow->in_h;
+ else
+ line_sz = dflow->in_w;
+
+ if (kfb->base.format->hsub > 1)
+ max_line_sz = layer->yuv_line_sz;
+ else
+ max_line_sz = layer->line_sz;
+
+ if (line_sz > max_line_sz) {
+ DRM_DEBUG_ATOMIC("Required line_sz: %d exceeds the max size %d\n",
+ line_sz, max_line_sz);
+ return -EINVAL;
+ }
+
return 0;
}

--
2.17.1
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