1 files changed, 388 insertions, 0 deletions
diff --git a/drivers/gpu/drm/loongson/lsdc_drv.h b/drivers/gpu/drm/loongson/lsdc_drv.h
new file mode 100644
index 0000000000..fbf2d760ef
--- /dev/null
+++ b/drivers/gpu/drm/loongson/lsdc_drv.h
@@ -0,0 +1,388 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2023 Loongson Technology Corporation Limited
+ */
+
+#ifndef __LSDC_DRV_H__
+#define __LSDC_DRV_H__
+
+#include <linux/pci.h>
+
+#include <drm/drm_connector.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_device.h>
+#include <drm/drm_encoder.h>
+#include <drm/drm_file.h>
+#include <drm/drm_plane.h>
+#include <drm/ttm/ttm_device.h>
+
+#include "lsdc_i2c.h"
+#include "lsdc_irq.h"
+#include "lsdc_gfxpll.h"
+#include "lsdc_output.h"
+#include "lsdc_pixpll.h"
+#include "lsdc_regs.h"
+
+/* Currently, all Loongson display controllers have two display pipes. */
+#define LSDC_NUM_CRTC           2
+
+/*
+ * LS7A1000/LS7A2000 chipsets function as the south & north bridges of the
+ * Loongson 3 series processors, they are equipped with on-board video RAM
+ * typically. While Loongson LS2K series are low cost SoCs which share the
+ * system RAM as video RAM, they don't has a dedicated VRAM.
+ *
+ * There is only a 1:1 mapping of crtcs, encoders and connectors for the DC
+ *
+ * display pipe 0 = crtc0 + dvo0 + encoder0 + connector0 + cursor0 + primary0
+ * display pipe 1 = crtc1 + dvo1 + encoder1 + connectro1 + cursor1 + primary1
+ */
+
+enum loongson_chip_id {
+	CHIP_LS7A1000 = 0,
+	CHIP_LS7A2000 = 1,
+	CHIP_LS_LAST,
+};
+
+const struct lsdc_desc *
+lsdc_device_probe(struct pci_dev *pdev, enum loongson_chip_id chip);
+
+struct lsdc_kms_funcs;
+
+/* DC specific */
+
+struct lsdc_desc {
+	u32 num_of_crtc;
+	u32 max_pixel_clk;
+	u32 max_width;
+	u32 max_height;
+	u32 num_of_hw_cursor;
+	u32 hw_cursor_w;
+	u32 hw_cursor_h;
+	u32 pitch_align;         /* CRTC DMA alignment constraint */
+	bool has_vblank_counter; /* 32 bit hw vsync counter */
+
+	/* device dependent ops, dc side */
+	const struct lsdc_kms_funcs *funcs;
+};
+
+/* GFX related resources wrangler */
+
+struct loongson_gfx_desc {
+	struct lsdc_desc dc;
+
+	u32 conf_reg_base;
+
+	/* GFXPLL shared by the DC, GMC and GPU */
+	struct {
+		u32 reg_offset;
+		u32 reg_size;
+	} gfxpll;
+
+	/* Pixel PLL, per display pipe */
+	struct {
+		u32 reg_offset;
+		u32 reg_size;
+	} pixpll[LSDC_NUM_CRTC];
+
+	enum loongson_chip_id chip_id;
+	char model[64];
+};
+
+static inline const struct loongson_gfx_desc *
+to_loongson_gfx(const struct lsdc_desc *dcp)
+{
+	return container_of_const(dcp, struct loongson_gfx_desc, dc);
+};
+
+struct lsdc_reg32 {
+	char *name;
+	u32 offset;
+};
+
+/* crtc hardware related ops */
+
+struct lsdc_crtc;
+
+struct lsdc_crtc_hw_ops {
+	void (*enable)(struct lsdc_crtc *lcrtc);
+	void (*disable)(struct lsdc_crtc *lcrtc);
+	void (*enable_vblank)(struct lsdc_crtc *lcrtc);
+	void (*disable_vblank)(struct lsdc_crtc *lcrtc);
+	void (*flip)(struct lsdc_crtc *lcrtc);
+	void (*clone)(struct lsdc_crtc *lcrtc);
+	void (*get_scan_pos)(struct lsdc_crtc *lcrtc, int *hpos, int *vpos);
+	void (*set_mode)(struct lsdc_crtc *lcrtc, const struct drm_display_mode *mode);
+	void (*soft_reset)(struct lsdc_crtc *lcrtc);
+	void (*reset)(struct lsdc_crtc *lcrtc);
+
+	u32  (*get_vblank_counter)(struct lsdc_crtc *lcrtc);
+	void (*set_dma_step)(struct lsdc_crtc *lcrtc, enum lsdc_dma_steps step);
+};
+
+struct lsdc_crtc {
+	struct drm_crtc base;
+	struct lsdc_pixpll pixpll;
+	struct lsdc_device *ldev;
+	const struct lsdc_crtc_hw_ops *hw_ops;
+	const struct lsdc_reg32 *preg;
+	unsigned int nreg;
+	struct drm_info_list *p_info_list;
+	unsigned int n_info_list;
+	bool has_vblank;
+};
+
+/* primary plane hardware related ops */
+
+struct lsdc_primary;
+
+struct lsdc_primary_plane_ops {
+	void (*update_fb_addr)(struct lsdc_primary *plane, u64 addr);
+	void (*update_fb_stride)(struct lsdc_primary *plane, u32 stride);
+	void (*update_fb_format)(struct lsdc_primary *plane,
+				 const struct drm_format_info *format);
+};
+
+struct lsdc_primary {
+	struct drm_plane base;
+	const struct lsdc_primary_plane_ops *ops;
+	struct lsdc_device *ldev;
+};
+
+/* cursor plane hardware related ops */
+
+struct lsdc_cursor;
+
+struct lsdc_cursor_plane_ops {
+	void (*update_bo_addr)(struct lsdc_cursor *plane, u64 addr);
+	void (*update_cfg)(struct lsdc_cursor *plane,
+			   enum lsdc_cursor_size cursor_size,
+			   enum lsdc_cursor_format);
+	void (*update_position)(struct lsdc_cursor *plane, int x, int y);
+};
+
+struct lsdc_cursor {
+	struct drm_plane base;
+	const struct lsdc_cursor_plane_ops *ops;
+	struct lsdc_device *ldev;
+};
+
+struct lsdc_output {
+	struct drm_encoder encoder;
+	struct drm_connector connector;
+};
+
+static inline struct lsdc_output *
+connector_to_lsdc_output(struct drm_connector *connector)
+{
+	return container_of(connector, struct lsdc_output, connector);
+}
+
+static inline struct lsdc_output *
+encoder_to_lsdc_output(struct drm_encoder *encoder)
+{
+	return container_of(encoder, struct lsdc_output, encoder);
+}
+
+struct lsdc_display_pipe {
+	struct lsdc_crtc crtc;
+	struct lsdc_primary primary;
+	struct lsdc_cursor cursor;
+	struct lsdc_output output;
+	struct lsdc_i2c *li2c;
+	unsigned int index;
+};
+
+static inline struct lsdc_display_pipe *
+output_to_display_pipe(struct lsdc_output *output)
+{
+	return container_of(output, struct lsdc_display_pipe, output);
+}
+
+struct lsdc_kms_funcs {
+	irqreturn_t (*irq_handler)(int irq, void *arg);
+
+	int (*create_i2c)(struct drm_device *ddev,
+			  struct lsdc_display_pipe *dispipe,
+			  unsigned int index);
+
+	int (*output_init)(struct drm_device *ddev,
+			   struct lsdc_display_pipe *dispipe,
+			   struct i2c_adapter *ddc,
+			   unsigned int index);
+
+	int (*cursor_plane_init)(struct drm_device *ddev,
+				 struct drm_plane *plane,
+				 unsigned int index);
+
+	int (*primary_plane_init)(struct drm_device *ddev,
+				  struct drm_plane *plane,
+				  unsigned int index);
+
+	int (*crtc_init)(struct drm_device *ddev,
+			 struct drm_crtc *crtc,
+			 struct drm_plane *primary,
+			 struct drm_plane *cursor,
+			 unsigned int index,
+			 bool has_vblank);
+};
+
+static inline struct lsdc_crtc *
+to_lsdc_crtc(struct drm_crtc *crtc)
+{
+	return container_of(crtc, struct lsdc_crtc, base);
+}
+
+static inline struct lsdc_display_pipe *
+crtc_to_display_pipe(struct drm_crtc *crtc)
+{
+	return container_of(crtc, struct lsdc_display_pipe, crtc.base);
+}
+
+static inline struct lsdc_primary *
+to_lsdc_primary(struct drm_plane *plane)
+{
+	return container_of(plane, struct lsdc_primary, base);
+}
+
+static inline struct lsdc_cursor *
+to_lsdc_cursor(struct drm_plane *plane)
+{
+	return container_of(plane, struct lsdc_cursor, base);
+}
+
+struct lsdc_crtc_state {
+	struct drm_crtc_state base;
+	struct lsdc_pixpll_parms pparms;
+};
+
+struct lsdc_gem {
+	/* @mutex: protect objects list */
+	struct mutex mutex;
+	struct list_head objects;
+};
+
+struct lsdc_device {
+	struct drm_device base;
+	struct ttm_device bdev;
+
+	/* @descp: features description of the DC variant */
+	const struct lsdc_desc *descp;
+	struct pci_dev *dc;
+	struct pci_dev *gpu;
+
+	struct loongson_gfxpll *gfxpll;
+
+	/* @reglock: protects concurrent access */
+	spinlock_t reglock;
+
+	void __iomem *reg_base;
+	resource_size_t vram_base;
+	resource_size_t vram_size;
+
+	resource_size_t gtt_base;
+	resource_size_t gtt_size;
+
+	struct lsdc_display_pipe dispipe[LSDC_NUM_CRTC];
+
+	struct lsdc_gem gem;
+
+	u32 irq_status;
+
+	/* tracking pinned memory */
+	size_t vram_pinned_size;
+	size_t gtt_pinned_size;
+
+	/* @num_output: count the number of active display pipe */
+	unsigned int num_output;
+};
+
+static inline struct lsdc_device *tdev_to_ldev(struct ttm_device *bdev)
+{
+	return container_of(bdev, struct lsdc_device, bdev);
+}
+
+static inline struct lsdc_device *to_lsdc(struct drm_device *ddev)
+{
+	return container_of(ddev, struct lsdc_device, base);
+}
+
+static inline struct lsdc_crtc_state *
+to_lsdc_crtc_state(struct drm_crtc_state *base)
+{
+	return container_of(base, struct lsdc_crtc_state, base);
+}
+
+void lsdc_debugfs_init(struct drm_minor *minor);
+
+int ls7a1000_crtc_init(struct drm_device *ddev,
+		       struct drm_crtc *crtc,
+		       struct drm_plane *primary,
+		       struct drm_plane *cursor,
+		       unsigned int index,
+		       bool no_vblank);
+
+int ls7a2000_crtc_init(struct drm_device *ddev,
+		       struct drm_crtc *crtc,
+		       struct drm_plane *primary,
+		       struct drm_plane *cursor,
+		       unsigned int index,
+		       bool no_vblank);
+
+int lsdc_primary_plane_init(struct drm_device *ddev,
+			    struct drm_plane *plane,
+			    unsigned int index);
+
+int ls7a1000_cursor_plane_init(struct drm_device *ddev,
+			       struct drm_plane *plane,
+			       unsigned int index);
+
+int ls7a2000_cursor_plane_init(struct drm_device *ddev,
+			       struct drm_plane *plane,
+			       unsigned int index);
+
+/* Registers access helpers */
+
+static inline u32 lsdc_rreg32(struct lsdc_device *ldev, u32 offset)
+{
+	return readl(ldev->reg_base + offset);
+}
+
+static inline void lsdc_wreg32(struct lsdc_device *ldev, u32 offset, u32 val)
+{
+	writel(val, ldev->reg_base + offset);
+}
+
+static inline void lsdc_ureg32_set(struct lsdc_device *ldev,
+				   u32 offset,
+				   u32 mask)
+{
+	void __iomem *addr = ldev->reg_base + offset;
+	u32 val = readl(addr);
+
+	writel(val | mask, addr);
+}
+
+static inline void lsdc_ureg32_clr(struct lsdc_device *ldev,
+				   u32 offset,
+				   u32 mask)
+{
+	void __iomem *addr = ldev->reg_base + offset;
+	u32 val = readl(addr);
+
+	writel(val & ~mask, addr);
+}
+
+static inline u32 lsdc_pipe_rreg32(struct lsdc_device *ldev,
+				   u32 offset, u32 pipe)
+{
+	return readl(ldev->reg_base + offset + pipe * CRTC_PIPE_OFFSET);
+}
+
+static inline void lsdc_pipe_wreg32(struct lsdc_device *ldev,
+				    u32 offset, u32 pipe, u32 val)
+{
+	writel(val, ldev->reg_base + offset + pipe * CRTC_PIPE_OFFSET);
+}
+
+#endif