1 files changed, 258 insertions, 0 deletions
diff --git a/drivers/gpu/drm/imx/dc/dc-fu.c b/drivers/gpu/drm/imx/dc/dc-fu.c
new file mode 100644
index 000000000000..f94c591c8158
--- /dev/null
+++ b/drivers/gpu/drm/imx/dc/dc-fu.c
@@ -0,0 +1,258 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2024 NXP
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bitops.h>
+#include <linux/bits.h>
+#include <linux/math.h>
+
+#include "dc-fu.h"
+#include "dc-pe.h"
+
+/* STATICCONTROL */
+#define SHDLDREQSTICKY_MASK		GENMASK(31, 24)
+#define SHDLDREQSTICKY(x)		FIELD_PREP(SHDLDREQSTICKY_MASK, (x))
+#define BASEADDRESSAUTOUPDATE_MASK	GENMASK(23, 16)
+#define BASEADDRESSAUTOUPDATE(x)	FIELD_PREP(BASEADDRESSAUTOUPDATE_MASK, (x))
+
+/* BURSTBUFFERMANAGEMENT */
+#define SETBURSTLENGTH_MASK		GENMASK(12, 8)
+#define SETBURSTLENGTH(x)		FIELD_PREP(SETBURSTLENGTH_MASK, (x))
+#define SETNUMBUFFERS_MASK		GENMASK(7, 0)
+#define SETNUMBUFFERS(x)		FIELD_PREP(SETNUMBUFFERS_MASK, (x))
+#define LINEMODE_MASK			BIT(31)
+
+/* SOURCEBUFFERATTRIBUTES */
+#define BITSPERPIXEL_MASK		GENMASK(21, 16)
+#define BITSPERPIXEL(x)			FIELD_PREP(BITSPERPIXEL_MASK, (x))
+#define STRIDE_MASK			GENMASK(15, 0)
+#define STRIDE(x)			FIELD_PREP(STRIDE_MASK, (x) - 1)
+
+/* SOURCEBUFFERDIMENSION */
+#define LINEWIDTH(x)			FIELD_PREP(GENMASK(13, 0), (x))
+#define LINECOUNT(x)			FIELD_PREP(GENMASK(29, 16), (x))
+
+/* LAYEROFFSET */
+#define LAYERXOFFSET(x)			FIELD_PREP(GENMASK(14, 0), (x))
+#define LAYERYOFFSET(x)			FIELD_PREP(GENMASK(30, 16), (x))
+
+/* CLIPWINDOWOFFSET */
+#define CLIPWINDOWXOFFSET(x)		FIELD_PREP(GENMASK(14, 0), (x))
+#define CLIPWINDOWYOFFSET(x)		FIELD_PREP(GENMASK(30, 16), (x))
+
+/* CLIPWINDOWDIMENSIONS */
+#define CLIPWINDOWWIDTH(x)		FIELD_PREP(GENMASK(13, 0), (x) - 1)
+#define CLIPWINDOWHEIGHT(x)		FIELD_PREP(GENMASK(29, 16), (x) - 1)
+
+enum dc_linemode {
+	/*
+	 * Mandatory setting for operation in the Display Controller.
+	 * Works also for Blit Engine with marginal performance impact.
+	 */
+	LINEMODE_DISPLAY = 0,
+};
+
+struct dc_fu_pixel_format {
+	u32 pixel_format;
+	u32 bits;
+	u32 shifts;
+};
+
+static const struct dc_fu_pixel_format pixel_formats[] = {
+	{
+		DRM_FORMAT_XRGB8888,
+		R_BITS(8)   | G_BITS(8)   | B_BITS(8)   | A_BITS(0),
+		R_SHIFT(16) | G_SHIFT(8)  | B_SHIFT(0)  | A_SHIFT(0),
+	},
+};
+
+void dc_fu_get_pixel_format_bits(struct dc_fu *fu, u32 format, u32 *bits)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(pixel_formats); i++) {
+		if (pixel_formats[i].pixel_format == format) {
+			*bits = pixel_formats[i].bits;
+			return;
+		}
+	}
+}
+
+void
+dc_fu_get_pixel_format_shifts(struct dc_fu *fu, u32 format, u32 *shifts)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(pixel_formats); i++) {
+		if (pixel_formats[i].pixel_format == format) {
+			*shifts = pixel_formats[i].shifts;
+			return;
+		}
+	}
+}
+
+static inline void dc_fu_enable_shden(struct dc_fu *fu)
+{
+	regmap_write_bits(fu->reg_cfg, STATICCONTROL, SHDEN, SHDEN);
+}
+
+static inline void dc_fu_baddr_autoupdate(struct dc_fu *fu, u8 layer_mask)
+{
+	regmap_write_bits(fu->reg_cfg, STATICCONTROL,
+			  BASEADDRESSAUTOUPDATE_MASK,
+			  BASEADDRESSAUTOUPDATE(layer_mask));
+}
+
+void dc_fu_shdldreq_sticky(struct dc_fu *fu, u8 layer_mask)
+{
+	regmap_write_bits(fu->reg_cfg, STATICCONTROL, SHDLDREQSTICKY_MASK,
+			  SHDLDREQSTICKY(layer_mask));
+}
+
+static inline void dc_fu_set_linemode(struct dc_fu *fu, enum dc_linemode mode)
+{
+	regmap_write_bits(fu->reg_cfg, BURSTBUFFERMANAGEMENT, LINEMODE_MASK,
+			  mode);
+}
+
+static inline void dc_fu_set_numbuffers(struct dc_fu *fu, unsigned int num)
+{
+	regmap_write_bits(fu->reg_cfg, BURSTBUFFERMANAGEMENT,
+			  SETNUMBUFFERS_MASK, SETNUMBUFFERS(num));
+}
+
+static void dc_fu_set_burstlength(struct dc_fu *fu, dma_addr_t baddr)
+{
+	unsigned int burst_size, burst_length;
+
+	burst_size = 1 << __ffs(baddr);
+	burst_size = round_up(burst_size, 8);
+	burst_size = min(burst_size, 128U);
+	burst_length = burst_size / 8;
+
+	regmap_write_bits(fu->reg_cfg, BURSTBUFFERMANAGEMENT,
+			  SETBURSTLENGTH_MASK, SETBURSTLENGTH(burst_length));
+}
+
+static void dc_fu_set_baseaddress(struct dc_fu *fu, enum dc_fu_frac frac,
+				  dma_addr_t baddr)
+{
+	regmap_write(fu->reg_cfg, fu->reg_baseaddr[frac], baddr);
+}
+
+void dc_fu_set_src_bpp(struct dc_fu *fu, enum dc_fu_frac frac, unsigned int bpp)
+{
+	regmap_write_bits(fu->reg_cfg, fu->reg_sourcebufferattributes[frac],
+			  BITSPERPIXEL_MASK, BITSPERPIXEL(bpp));
+}
+
+static void dc_fu_set_src_stride(struct dc_fu *fu, enum dc_fu_frac frac,
+				 unsigned int stride)
+{
+	regmap_write_bits(fu->reg_cfg, fu->reg_sourcebufferattributes[frac],
+			  STRIDE_MASK, STRIDE(stride));
+}
+
+static void dc_fu_set_src_buf_dimensions(struct dc_fu *fu, enum dc_fu_frac frac,
+					 int w, int h)
+{
+	regmap_write(fu->reg_cfg, fu->reg_sourcebufferdimension[frac],
+		     LINEWIDTH(w) | LINECOUNT(h));
+}
+
+static inline void dc_fu_layeroffset(struct dc_fu *fu, enum dc_fu_frac frac,
+				     unsigned int x, unsigned int y)
+{
+	regmap_write(fu->reg_cfg, fu->reg_layeroffset[frac],
+		     LAYERXOFFSET(x) | LAYERYOFFSET(y));
+}
+
+static inline void dc_fu_clipoffset(struct dc_fu *fu, enum dc_fu_frac frac,
+				    unsigned int x, unsigned int y)
+{
+	regmap_write(fu->reg_cfg, fu->reg_clipwindowoffset[frac],
+		     CLIPWINDOWXOFFSET(x) | CLIPWINDOWYOFFSET(y));
+}
+
+static inline void dc_fu_clipdimensions(struct dc_fu *fu, enum dc_fu_frac frac,
+					unsigned int w, unsigned int h)
+{
+	regmap_write(fu->reg_cfg, fu->reg_clipwindowdimensions[frac],
+		     CLIPWINDOWWIDTH(w) | CLIPWINDOWHEIGHT(h));
+}
+
+static inline void
+dc_fu_set_pixel_blend_mode(struct dc_fu *fu, enum dc_fu_frac frac)
+{
+	regmap_write(fu->reg_cfg, fu->reg_layerproperty[frac], 0);
+	regmap_write(fu->reg_cfg, fu->reg_constantcolor[frac], 0);
+}
+
+static void dc_fu_enable_src_buf(struct dc_fu *fu, enum dc_fu_frac frac)
+{
+	regmap_write_bits(fu->reg_cfg, fu->reg_layerproperty[frac],
+			  SOURCEBUFFERENABLE, SOURCEBUFFERENABLE);
+}
+
+static void dc_fu_disable_src_buf(struct dc_fu *fu, enum dc_fu_frac frac)
+{
+	regmap_write_bits(fu->reg_cfg, fu->reg_layerproperty[frac],
+			  SOURCEBUFFERENABLE, 0);
+
+	if (fu->lb) {
+		dc_lb_pec_clken(fu->lb, CLKEN_DISABLE);
+		dc_lb_mode(fu->lb, LB_NEUTRAL);
+	}
+}
+
+static void dc_fu_set_layerblend(struct dc_fu *fu, struct dc_lb *lb)
+{
+	fu->lb = lb;
+}
+
+static enum dc_link_id dc_fu_get_link_id(struct dc_fu *fu)
+{
+	return fu->link_id;
+}
+
+static const char *dc_fu_get_name(struct dc_fu *fu)
+{
+	return fu->name;
+}
+
+const struct dc_fu_ops dc_fu_common_ops = {
+	.set_burstlength	= dc_fu_set_burstlength,
+	.set_baseaddress	= dc_fu_set_baseaddress,
+	.set_src_stride		= dc_fu_set_src_stride,
+	.set_src_buf_dimensions = dc_fu_set_src_buf_dimensions,
+	.enable_src_buf		= dc_fu_enable_src_buf,
+	.disable_src_buf	= dc_fu_disable_src_buf,
+	.set_layerblend		= dc_fu_set_layerblend,
+	.get_link_id		= dc_fu_get_link_id,
+	.get_name		= dc_fu_get_name,
+};
+
+const struct dc_fu_ops *dc_fu_get_ops(struct dc_fu *fu)
+{
+	return &fu->ops;
+}
+
+void dc_fu_common_hw_init(struct dc_fu *fu)
+{
+	enum dc_fu_frac i;
+
+	dc_fu_baddr_autoupdate(fu, 0x0);
+	dc_fu_enable_shden(fu);
+	dc_fu_set_linemode(fu, LINEMODE_DISPLAY);
+	dc_fu_set_numbuffers(fu, 16);
+
+	for (i = DC_FETCHUNIT_FRAC0; i < DC_FETCHUNIT_FRAC_NUM; i++) {
+		dc_fu_layeroffset(fu, i, 0, 0);
+		dc_fu_clipoffset(fu, i, 0, 0);
+		dc_fu_clipdimensions(fu, i, 1, 1);
+		dc_fu_disable_src_buf(fu, i);
+		dc_fu_set_pixel_blend_mode(fu, i);
+	}
+}