drm/komeda: Add komeda_format_caps for format handling

komeda_format_caps is for describing ARM display specific features and
limitations of a specific format, and format_caps will be linked into
&komeda_framebuffer like a extension of &drm_format_info.
And komed_format_caps_table will be initialized before the enum_resources,
since the layer features description depend on this format_caps table, so
we'd better initialize the table first.

Changes in v4:
- Rebase.

Changes in v3:
- Fixed style problem found by checkpatch.pl --strict.
Signed-off-by: James Qian Wang (Arm Technology China) <james.qian.wang@arm.com>
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>

drivers/gpu/drm/arm/display/komeda/Makefile

@@ -7,6 +7,7 @@ ccflags-y := \
 komeda-y := \
 	komeda_drv.o \
 	komeda_dev.o \
+	komeda_format_caps.o \
 	komeda_pipeline.o
 
 komeda-y += \

drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c

@@ -13,7 +13,85 @@ static int d71_enum_resources(struct komeda_dev *mdev)
 	return -1;
 }
 
+#define __HW_ID(__group, __format) \
+	((((__group) & 0x7) << 3) | ((__format) & 0x7))
+
+#define RICH		KOMEDA_FMT_RICH_LAYER
+#define SIMPLE		KOMEDA_FMT_SIMPLE_LAYER
+#define RICH_SIMPLE	(KOMEDA_FMT_RICH_LAYER | KOMEDA_FMT_SIMPLE_LAYER)
+#define RICH_WB		(KOMEDA_FMT_RICH_LAYER | KOMEDA_FMT_WB_LAYER)
+#define RICH_SIMPLE_WB	(RICH_SIMPLE | KOMEDA_FMT_WB_LAYER)
+
+#define Rot_0		DRM_MODE_ROTATE_0
+#define Flip_H_V	(DRM_MODE_REFLECT_X | DRM_MODE_REFLECT_Y | Rot_0)
+#define Rot_ALL_H_V	(DRM_MODE_ROTATE_MASK | Flip_H_V)
+
+#define LYT_NM		BIT(AFBC_FORMAT_MOD_BLOCK_SIZE_16x16)
+#define LYT_WB		BIT(AFBC_FORMAT_MOD_BLOCK_SIZE_32x8)
+#define LYT_NM_WB	(LYT_NM | LYT_WB)
+
+#define AFB_TH		AFBC(_TILED | _SPARSE)
+#define AFB_TH_SC_YTR	AFBC(_TILED | _SC | _SPARSE | _YTR)
+#define AFB_TH_SC_YTR_BS AFBC(_TILED | _SC | _SPARSE | _YTR | _SPLIT)
+
+static struct komeda_format_caps d71_format_caps_table[] = {
+	/*   HW_ID    |        fourcc        | tile_sz |   layer_types |   rots    | afbc_layouts | afbc_features */
+	/* ABGR_2101010*/
+	{__HW_ID(0, 0),	DRM_FORMAT_ARGB2101010,	1,	RICH_SIMPLE_WB,	Flip_H_V,		0, 0},
+	{__HW_ID(0, 1),	DRM_FORMAT_ABGR2101010,	1,	RICH_SIMPLE_WB,	Flip_H_V,		0, 0},
+	{__HW_ID(0, 1),	DRM_FORMAT_ABGR2101010,	1,	RICH_SIMPLE,	Rot_ALL_H_V,	LYT_NM_WB, AFB_TH_SC_YTR_BS}, /* afbc */
+	{__HW_ID(0, 2),	DRM_FORMAT_RGBA1010102,	1,	RICH_SIMPLE_WB,	Flip_H_V,		0, 0},
+	{__HW_ID(0, 3),	DRM_FORMAT_BGRA1010102,	1,	RICH_SIMPLE_WB,	Flip_H_V,		0, 0},
+	/* ABGR_8888*/
+	{__HW_ID(1, 0),	DRM_FORMAT_ARGB8888,	1,	RICH_SIMPLE_WB,	Flip_H_V,		0, 0},
+	{__HW_ID(1, 1),	DRM_FORMAT_ABGR8888,	1,	RICH_SIMPLE_WB,	Flip_H_V,		0, 0},
+	{__HW_ID(1, 1),	DRM_FORMAT_ABGR8888,	1,	RICH_SIMPLE,	Rot_ALL_H_V,	LYT_NM_WB, AFB_TH_SC_YTR_BS}, /* afbc */
+	{__HW_ID(1, 2),	DRM_FORMAT_RGBA8888,	1,	RICH_SIMPLE_WB,	Flip_H_V,		0, 0},
+	{__HW_ID(1, 3),	DRM_FORMAT_BGRA8888,	1,	RICH_SIMPLE_WB,	Flip_H_V,		0, 0},
+	/* XBGB_8888 */
+	{__HW_ID(2, 0),	DRM_FORMAT_XRGB8888,	1,	RICH_SIMPLE_WB,	Flip_H_V,		0, 0},
+	{__HW_ID(2, 1),	DRM_FORMAT_XBGR8888,	1,	RICH_SIMPLE_WB,	Flip_H_V,		0, 0},
+	{__HW_ID(2, 2),	DRM_FORMAT_RGBX8888,	1,	RICH_SIMPLE_WB,	Flip_H_V,		0, 0},
+	{__HW_ID(2, 3),	DRM_FORMAT_BGRX8888,	1,	RICH_SIMPLE_WB,	Flip_H_V,		0, 0},
+	/* BGR_888 */ /* none-afbc RGB888 doesn't support rotation and flip */
+	{__HW_ID(3, 0),	DRM_FORMAT_RGB888,	1,	RICH_SIMPLE_WB,	Rot_0,			0, 0},
+	{__HW_ID(3, 1),	DRM_FORMAT_BGR888,	1,	RICH_SIMPLE_WB,	Rot_0,			0, 0},
+	{__HW_ID(3, 1),	DRM_FORMAT_BGR888,	1,	RICH_SIMPLE,	Rot_ALL_H_V,	LYT_NM_WB, AFB_TH_SC_YTR_BS}, /* afbc */
+	/* BGR 16bpp */
+	{__HW_ID(4, 0),	DRM_FORMAT_RGBA5551,	1,	RICH_SIMPLE,	Flip_H_V,		0, 0},
+	{__HW_ID(4, 1),	DRM_FORMAT_ABGR1555,	1,	RICH_SIMPLE,	Flip_H_V,		0, 0},
+	{__HW_ID(4, 1),	DRM_FORMAT_ABGR1555,	1,	RICH_SIMPLE,	Rot_ALL_H_V,	LYT_NM_WB, AFB_TH_SC_YTR}, /* afbc */
+	{__HW_ID(4, 2),	DRM_FORMAT_RGB565,	1,	RICH_SIMPLE,	Flip_H_V,		0, 0},
+	{__HW_ID(4, 3),	DRM_FORMAT_BGR565,	1,	RICH_SIMPLE,	Flip_H_V,		0, 0},
+	{__HW_ID(4, 3),	DRM_FORMAT_BGR565,	1,	RICH_SIMPLE,	Rot_ALL_H_V,	LYT_NM_WB, AFB_TH_SC_YTR}, /* afbc */
+	{__HW_ID(4, 4), DRM_FORMAT_R8,		1,	SIMPLE,		Rot_0,			0, 0},
+	/* YUV 444/422/420 8bit  */
+	{__HW_ID(5, 0),	0 /*XYUV8888*/,		1,	0,		0,			0, 0},
+	/* XYUV unsupported*/
+	{__HW_ID(5, 1),	DRM_FORMAT_YUYV,	1,	RICH,		Rot_ALL_H_V,	LYT_NM, AFB_TH}, /* afbc */
+	{__HW_ID(5, 2),	DRM_FORMAT_YUYV,	1,	RICH,		Flip_H_V,		0, 0},
+	{__HW_ID(5, 3),	DRM_FORMAT_UYVY,	1,	RICH,		Flip_H_V,		0, 0},
+	{__HW_ID(5, 4),	0, /*X0L0 */		2,		0,			0, 0}, /* Y0L0 unsupported */
+	{__HW_ID(5, 6),	DRM_FORMAT_NV12,	1,	RICH,		Flip_H_V,		0, 0},
+	{__HW_ID(5, 6),	0/*DRM_FORMAT_YUV420_8BIT*/,	1,	RICH,	Rot_ALL_H_V,	LYT_NM, AFB_TH}, /* afbc */
+	{__HW_ID(5, 7),	DRM_FORMAT_YUV420,	1,	RICH,		Flip_H_V,		0, 0},
+	/* YUV 10bit*/
+	{__HW_ID(6, 0),	0,/*XVYU2101010*/	1,	0,		0,			0, 0},/* VYV30 unsupported */
+	{__HW_ID(6, 6),	0/*DRM_FORMAT_X0L2*/,	2,	RICH,		Flip_H_V,		0, 0},
+	{__HW_ID(6, 7),	0/*DRM_FORMAT_P010*/,	1,	RICH,		Flip_H_V,		0, 0},
+	{__HW_ID(6, 7),	0/*DRM_FORMAT_YUV420_10BIT*/, 1,	RICH,	Rot_ALL_H_V,	LYT_NM, AFB_TH},
+};
+
+static void d71_init_fmt_tbl(struct komeda_dev *mdev)
+{
+	struct komeda_format_caps_table *table = &mdev->fmt_tbl;
+
+	table->format_caps = d71_format_caps_table;
+	table->n_formats = ARRAY_SIZE(d71_format_caps_table);
+}
+
 static struct komeda_dev_funcs d71_chip_funcs = {
+	.init_format_table = d71_init_fmt_tbl,
 	.enum_resources	= d71_enum_resources,
 	.cleanup	= NULL,
 };

drivers/gpu/drm/arm/display/komeda/komeda_dev.c

@@ -135,6 +135,8 @@ struct komeda_dev *komeda_dev_create(struct device *dev)
 		 MALIDP_CORE_ID_MAJOR(mdev->chip.core_id),
 		 MALIDP_CORE_ID_MINOR(mdev->chip.core_id));
 
+	mdev->funcs->init_format_table(mdev);
+
 	err = mdev->funcs->enum_resources(mdev);
 	if (err) {
 		DRM_ERROR("enumerate display resource failed.\n");

drivers/gpu/drm/arm/display/komeda/komeda_dev.h

@@ -11,6 +11,7 @@
 #include <linux/clk.h>
 #include "komeda_pipeline.h"
 #include "malidp_product.h"
+#include "komeda_format_caps.h"
 
 /* malidp device id */
 enum {
@@ -44,6 +45,13 @@ struct komeda_dev;
  * Supplied by chip level and returned by the chip entry function xxx_identify,
  */
 struct komeda_dev_funcs {
+	/**
+	 * @init_format_table:
+	 *
+	 * initialize &komeda_dev->format_table, this function should be called
+	 * before the &enum_resource
+	 */
+	void (*init_format_table)(struct komeda_dev *mdev);
 	/**
 	 * @enum_resources:
 	 *
@@ -66,7 +74,8 @@ struct komeda_dev {
 	u32 __iomem   *reg_base;
 
 	struct komeda_chip_info chip;
-
+	/** @fmt_tbl: initialized by &komeda_dev_funcs->init_format_table */
+	struct komeda_format_caps_table fmt_tbl;
 	/** @pclk: APB clock for register access */
 	struct clk *pclk;
 	/** @mck: HW main engine clk */

drivers/gpu/drm/arm/display/komeda/komeda_format_caps.c

+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
+ * Author: James.Qian.Wang <james.qian.wang@arm.com>
+ *
+ */
+
+#include <linux/slab.h>
+#include "komeda_format_caps.h"
+#include "malidp_utils.h"
+
+const struct komeda_format_caps *
+komeda_get_format_caps(struct komeda_format_caps_table *table,
+		       u32 fourcc, u64 modifier)
+{
+	const struct komeda_format_caps *caps;
+	u64 afbc_features = modifier & ~(AFBC_FORMAT_MOD_BLOCK_SIZE_MASK);
+	u32 afbc_layout = modifier & AFBC_FORMAT_MOD_BLOCK_SIZE_MASK;
+	int id;
+
+	for (id = 0; id < table->n_formats; id++) {
+		caps = &table->format_caps[id];
+
+		if (fourcc != caps->fourcc)
+			continue;
+
+		if ((modifier == 0ULL) && (caps->supported_afbc_layouts == 0))
+			return caps;
+
+		if (has_bits(afbc_features, caps->supported_afbc_features) &&
+		    has_bit(afbc_layout, caps->supported_afbc_layouts))
+			return caps;
+	}
+
+	return NULL;
+}
+
+u32 *komeda_get_layer_fourcc_list(struct komeda_format_caps_table *table,
+				  u32 layer_type, u32 *n_fmts)
+{
+	const struct komeda_format_caps *cap;
+	u32 *fmts;
+	int i, j, n = 0;
+
+	fmts = kcalloc(table->n_formats, sizeof(u32), GFP_KERNEL);
+	if (!fmts)
+		return NULL;
+
+	for (i = 0; i < table->n_formats; i++) {
+		cap = &table->format_caps[i];
+		if (!(layer_type & cap->supported_layer_types) ||
+		    (cap->fourcc == 0))
+			continue;
+
+		/* one fourcc may has two caps items in table (afbc/none-afbc),
+		 * so check the existing list to avoid adding a duplicated one.
+		 */
+		for (j = n - 1; j >= 0; j--)
+			if (fmts[j] == cap->fourcc)
+				break;
+
+		if (j < 0)
+			fmts[n++] = cap->fourcc;
+	}
+
+	if (n_fmts)
+		*n_fmts = n;
+
+	return fmts;
+}
+
+void komeda_put_fourcc_list(u32 *fourcc_list)
+{
+	kfree(fourcc_list);
+}

drivers/gpu/drm/arm/display/komeda/komeda_format_caps.h

+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
+ * Author: James.Qian.Wang <james.qian.wang@arm.com>
+ *
+ */
+
+#ifndef _KOMEDA_FORMAT_CAPS_H_
+#define _KOMEDA_FORMAT_CAPS_H_
+
+#include <linux/types.h>
+#include <uapi/drm/drm_fourcc.h>
+#include <drm/drm_fourcc.h>
+
+#define AFBC(x)		DRM_FORMAT_MOD_ARM_AFBC(x)
+
+/* afbc layerout */
+#define AFBC_16x16(x)	AFBC(AFBC_FORMAT_MOD_BLOCK_SIZE_16x16 | (x))
+#define AFBC_32x8(x)	AFBC(AFBC_FORMAT_MOD_BLOCK_SIZE_32x8 | (x))
+
+/* afbc features */
+#define _YTR		AFBC_FORMAT_MOD_YTR
+#define _SPLIT		AFBC_FORMAT_MOD_SPLIT
+#define _SPARSE		AFBC_FORMAT_MOD_SPARSE
+#define _CBR		AFBC_FORMAT_MOD_CBR
+#define _TILED		AFBC_FORMAT_MOD_TILED
+#define _SC		AFBC_FORMAT_MOD_SC
+
+/* layer_type */
+#define KOMEDA_FMT_RICH_LAYER		BIT(0)
+#define KOMEDA_FMT_SIMPLE_LAYER		BIT(1)
+#define KOMEDA_FMT_WB_LAYER		BIT(2)
+
+#define AFBC_TH_LAYOUT_ALIGNMENT	8
+#define AFBC_HEADER_SIZE		16
+#define AFBC_SUPERBLK_ALIGNMENT		128
+#define AFBC_SUPERBLK_PIXELS		256
+#define AFBC_BODY_START_ALIGNMENT	1024
+#define AFBC_TH_BODY_START_ALIGNMENT	4096
+
+/**
+ * struct komeda_format_caps
+ *
+ * komeda_format_caps is for describing ARM display specific features and
+ * limitations for a specific format, and format_caps will be linked into
+ * &komeda_framebuffer like a extension of &drm_format_info.
+ *
+ * NOTE: one fourcc may has two different format_caps items for fourcc and
+ * fourcc+modifier
+ *
+ * @hw_id: hw format id, hw specific value.
+ * @fourcc: drm fourcc format.
+ * @tile_size: format tiled size, used by ARM format X0L0/X0L2
+ * @supported_layer_types: indicate which layer supports this format
+ * @supported_rots: allowed rotations for this format
+ * @supported_afbc_layouts: supported afbc layerout
+ * @supported_afbc_features: supported afbc features
+ */
+struct komeda_format_caps {
+	u32 hw_id;
+	u32 fourcc;
+	u32 tile_size;
+	u32 supported_layer_types;
+	u32 supported_rots;
+	u32 supported_afbc_layouts;
+	u64 supported_afbc_features;
+};
+
+/**
+ * struct komeda_format_caps_table - format_caps mananger
+ *
+ * @n_formats: the size of format_caps list.
+ * @format_caps: format_caps list.
+ */
+struct komeda_format_caps_table {
+	u32 n_formats;
+	const struct komeda_format_caps *format_caps;
+};
+
+const struct komeda_format_caps *
+komeda_get_format_caps(struct komeda_format_caps_table *table,
+		       u32 fourcc, u64 modifier);
+
+u32 *komeda_get_layer_fourcc_list(struct komeda_format_caps_table *table,
+				  u32 layer_type, u32 *n_fmts);
+
+void komeda_put_fourcc_list(u32 *fourcc_list);
+
+#endif

drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h

@@ -211,6 +211,7 @@ static inline u16 component_changed_inputs(struct komeda_component_state *st)
 struct komeda_layer {
 	struct komeda_component base;
 	/* layer specific features and caps */
+	int layer_type; /* RICH, SIMPLE or WB */
 };
 
 struct komeda_layer_state {