Adding upstream version 5.10.209.upstream/5.10.209

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 415 insertions, 0 deletions

diff --git a/drivers/gpu/drm/sti/sti_cursor.c b/drivers/gpu/drm/sti/sti_cursor.c
new file mode 100644
index 000000000..a98057431
--- /dev/null
+++ b/drivers/gpu/drm/sti/sti_cursor.c
@@ -0,0 +1,415 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) STMicroelectronics SA 2014
+ * Authors: Vincent Abriou <vincent.abriou@st.com>
+ *          Fabien Dessenne <fabien.dessenne@st.com>
+ *          for STMicroelectronics.
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/seq_file.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_device.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+
+#include "sti_compositor.h"
+#include "sti_cursor.h"
+#include "sti_plane.h"
+#include "sti_vtg.h"
+
+/* Registers */
+#define CUR_CTL             0x00
+#define CUR_VPO             0x0C
+#define CUR_PML             0x14
+#define CUR_PMP             0x18
+#define CUR_SIZE            0x1C
+#define CUR_CML             0x20
+#define CUR_AWS             0x28
+#define CUR_AWE             0x2C
+
+#define CUR_CTL_CLUT_UPDATE BIT(1)
+
+#define STI_CURS_MIN_SIZE   1
+#define STI_CURS_MAX_SIZE   128
+
+/*
+ * pixmap dma buffer structure
+ *
+ * @paddr:  physical address
+ * @size:   buffer size
+ * @base:   virtual address
+ */
+struct dma_pixmap {
+	dma_addr_t paddr;
+	size_t size;
+	void *base;
+};
+
+/*
+ * STI Cursor structure
+ *
+ * @sti_plane:    sti_plane structure
+ * @dev:          driver device
+ * @regs:         cursor registers
+ * @width:        cursor width
+ * @height:       cursor height
+ * @clut:         color look up table
+ * @clut_paddr:   color look up table physical address
+ * @pixmap:       pixmap dma buffer (clut8-format cursor)
+ */
+struct sti_cursor {
+	struct sti_plane plane;
+	struct device *dev;
+	void __iomem *regs;
+	unsigned int width;
+	unsigned int height;
+	unsigned short *clut;
+	dma_addr_t clut_paddr;
+	struct dma_pixmap pixmap;
+};
+
+static const uint32_t cursor_supported_formats[] = {
+	DRM_FORMAT_ARGB8888,
+};
+
+#define to_sti_cursor(x) container_of(x, struct sti_cursor, plane)
+
+#define DBGFS_DUMP(reg) seq_printf(s, "\n  %-25s 0x%08X", #reg, \
+				   readl(cursor->regs + reg))
+
+static void cursor_dbg_vpo(struct seq_file *s, u32 val)
+{
+	seq_printf(s, "\txdo:%4d\tydo:%4d", val & 0x0FFF, (val >> 16) & 0x0FFF);
+}
+
+static void cursor_dbg_size(struct seq_file *s, u32 val)
+{
+	seq_printf(s, "\t%d x %d", val & 0x07FF, (val >> 16) & 0x07FF);
+}
+
+static void cursor_dbg_pml(struct seq_file *s,
+			   struct sti_cursor *cursor, u32 val)
+{
+	if (cursor->pixmap.paddr == val)
+		seq_printf(s, "\tVirt @: %p", cursor->pixmap.base);
+}
+
+static void cursor_dbg_cml(struct seq_file *s,
+			   struct sti_cursor *cursor, u32 val)
+{
+	if (cursor->clut_paddr == val)
+		seq_printf(s, "\tVirt @: %p", cursor->clut);
+}
+
+static int cursor_dbg_show(struct seq_file *s, void *data)
+{
+	struct drm_info_node *node = s->private;
+	struct sti_cursor *cursor = (struct sti_cursor *)node->info_ent->data;
+
+	seq_printf(s, "%s: (vaddr = 0x%p)",
+		   sti_plane_to_str(&cursor->plane), cursor->regs);
+
+	DBGFS_DUMP(CUR_CTL);
+	DBGFS_DUMP(CUR_VPO);
+	cursor_dbg_vpo(s, readl(cursor->regs + CUR_VPO));
+	DBGFS_DUMP(CUR_PML);
+	cursor_dbg_pml(s, cursor, readl(cursor->regs + CUR_PML));
+	DBGFS_DUMP(CUR_PMP);
+	DBGFS_DUMP(CUR_SIZE);
+	cursor_dbg_size(s, readl(cursor->regs + CUR_SIZE));
+	DBGFS_DUMP(CUR_CML);
+	cursor_dbg_cml(s, cursor, readl(cursor->regs + CUR_CML));
+	DBGFS_DUMP(CUR_AWS);
+	DBGFS_DUMP(CUR_AWE);
+	seq_putc(s, '\n');
+	return 0;
+}
+
+static struct drm_info_list cursor_debugfs_files[] = {
+	{ "cursor", cursor_dbg_show, 0, NULL },
+};
+
+static void cursor_debugfs_init(struct sti_cursor *cursor,
+				struct drm_minor *minor)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(cursor_debugfs_files); i++)
+		cursor_debugfs_files[i].data = cursor;
+
+	drm_debugfs_create_files(cursor_debugfs_files,
+				 ARRAY_SIZE(cursor_debugfs_files),
+				 minor->debugfs_root, minor);
+}
+
+static void sti_cursor_argb8888_to_clut8(struct sti_cursor *cursor, u32 *src)
+{
+	u8  *dst = cursor->pixmap.base;
+	unsigned int i, j;
+	u32 a, r, g, b;
+
+	for (i = 0; i < cursor->height; i++) {
+		for (j = 0; j < cursor->width; j++) {
+			/* Pick the 2 higher bits of each component */
+			a = (*src >> 30) & 3;
+			r = (*src >> 22) & 3;
+			g = (*src >> 14) & 3;
+			b = (*src >> 6) & 3;
+			*dst = a << 6 | r << 4 | g << 2 | b;
+			src++;
+			dst++;
+		}
+	}
+}
+
+static void sti_cursor_init(struct sti_cursor *cursor)
+{
+	unsigned short *base = cursor->clut;
+	unsigned int a, r, g, b;
+
+	/* Assign CLUT values, ARGB444 format */
+	for (a = 0; a < 4; a++)
+		for (r = 0; r < 4; r++)
+			for (g = 0; g < 4; g++)
+				for (b = 0; b < 4; b++)
+					*base++ = (a * 5) << 12 |
+						  (r * 5) << 8 |
+						  (g * 5) << 4 |
+						  (b * 5);
+}
+
+static int sti_cursor_atomic_check(struct drm_plane *drm_plane,
+				   struct drm_plane_state *state)
+{
+	struct sti_plane *plane = to_sti_plane(drm_plane);
+	struct sti_cursor *cursor = to_sti_cursor(plane);
+	struct drm_crtc *crtc = state->crtc;
+	struct drm_framebuffer *fb = state->fb;
+	struct drm_crtc_state *crtc_state;
+	struct drm_display_mode *mode;
+	int dst_x, dst_y, dst_w, dst_h;
+	int src_w, src_h;
+
+	/* no need for further checks if the plane is being disabled */
+	if (!crtc || !fb)
+		return 0;
+
+	crtc_state = drm_atomic_get_crtc_state(state->state, crtc);
+	mode = &crtc_state->mode;
+	dst_x = state->crtc_x;
+	dst_y = state->crtc_y;
+	dst_w = clamp_val(state->crtc_w, 0, mode->crtc_hdisplay - dst_x);
+	dst_h = clamp_val(state->crtc_h, 0, mode->crtc_vdisplay - dst_y);
+	/* src_x are in 16.16 format */
+	src_w = state->src_w >> 16;
+	src_h = state->src_h >> 16;
+
+	if (src_w < STI_CURS_MIN_SIZE ||
+	    src_h < STI_CURS_MIN_SIZE ||
+	    src_w > STI_CURS_MAX_SIZE ||
+	    src_h > STI_CURS_MAX_SIZE) {
+		DRM_ERROR("Invalid cursor size (%dx%d)\n",
+				src_w, src_h);
+		return -EINVAL;
+	}
+
+	/* If the cursor size has changed, re-allocated the pixmap */
+	if (!cursor->pixmap.base ||
+	    (cursor->width != src_w) ||
+	    (cursor->height != src_h)) {
+		cursor->width = src_w;
+		cursor->height = src_h;
+
+		if (cursor->pixmap.base)
+			dma_free_wc(cursor->dev, cursor->pixmap.size,
+				    cursor->pixmap.base, cursor->pixmap.paddr);
+
+		cursor->pixmap.size = cursor->width * cursor->height;
+
+		cursor->pixmap.base = dma_alloc_wc(cursor->dev,
+						   cursor->pixmap.size,
+						   &cursor->pixmap.paddr,
+						   GFP_KERNEL | GFP_DMA);
+		if (!cursor->pixmap.base) {
+			DRM_ERROR("Failed to allocate memory for pixmap\n");
+			return -EINVAL;
+		}
+	}
+
+	if (!drm_fb_cma_get_gem_obj(fb, 0)) {
+		DRM_ERROR("Can't get CMA GEM object for fb\n");
+		return -EINVAL;
+	}
+
+	DRM_DEBUG_KMS("CRTC:%d (%s) drm plane:%d (%s)\n",
+		      crtc->base.id, sti_mixer_to_str(to_sti_mixer(crtc)),
+		      drm_plane->base.id, sti_plane_to_str(plane));
+	DRM_DEBUG_KMS("(%dx%d)@(%d,%d)\n", dst_w, dst_h, dst_x, dst_y);
+
+	return 0;
+}
+
+static void sti_cursor_atomic_update(struct drm_plane *drm_plane,
+				     struct drm_plane_state *oldstate)
+{
+	struct drm_plane_state *state = drm_plane->state;
+	struct sti_plane *plane = to_sti_plane(drm_plane);
+	struct sti_cursor *cursor = to_sti_cursor(plane);
+	struct drm_crtc *crtc = state->crtc;
+	struct drm_framebuffer *fb = state->fb;
+	struct drm_display_mode *mode;
+	int dst_x, dst_y;
+	struct drm_gem_cma_object *cma_obj;
+	u32 y, x;
+	u32 val;
+
+	if (!crtc || !fb)
+		return;
+
+	mode = &crtc->mode;
+	dst_x = state->crtc_x;
+	dst_y = state->crtc_y;
+
+	cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
+
+	/* Convert ARGB8888 to CLUT8 */
+	sti_cursor_argb8888_to_clut8(cursor, (u32 *)cma_obj->vaddr);
+
+	/* AWS and AWE depend on the mode */
+	y = sti_vtg_get_line_number(*mode, 0);
+	x = sti_vtg_get_pixel_number(*mode, 0);
+	val = y << 16 | x;
+	writel(val, cursor->regs + CUR_AWS);
+	y = sti_vtg_get_line_number(*mode, mode->vdisplay - 1);
+	x = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1);
+	val = y << 16 | x;
+	writel(val, cursor->regs + CUR_AWE);
+
+	/* Set memory location, size, and position */
+	writel(cursor->pixmap.paddr, cursor->regs + CUR_PML);
+	writel(cursor->width, cursor->regs + CUR_PMP);
+	writel(cursor->height << 16 | cursor->width, cursor->regs + CUR_SIZE);
+
+	y = sti_vtg_get_line_number(*mode, dst_y);
+	x = sti_vtg_get_pixel_number(*mode, dst_x);
+	writel((y << 16) | x, cursor->regs + CUR_VPO);
+
+	/* Set and fetch CLUT */
+	writel(cursor->clut_paddr, cursor->regs + CUR_CML);
+	writel(CUR_CTL_CLUT_UPDATE, cursor->regs + CUR_CTL);
+
+	sti_plane_update_fps(plane, true, false);
+
+	plane->status = STI_PLANE_UPDATED;
+}
+
+static void sti_cursor_atomic_disable(struct drm_plane *drm_plane,
+				      struct drm_plane_state *oldstate)
+{
+	struct sti_plane *plane = to_sti_plane(drm_plane);
+
+	if (!oldstate->crtc) {
+		DRM_DEBUG_DRIVER("drm plane:%d not enabled\n",
+				 drm_plane->base.id);
+		return;
+	}
+
+	DRM_DEBUG_DRIVER("CRTC:%d (%s) drm plane:%d (%s)\n",
+			 oldstate->crtc->base.id,
+			 sti_mixer_to_str(to_sti_mixer(oldstate->crtc)),
+			 drm_plane->base.id, sti_plane_to_str(plane));
+
+	plane->status = STI_PLANE_DISABLING;
+}
+
+static const struct drm_plane_helper_funcs sti_cursor_helpers_funcs = {
+	.atomic_check = sti_cursor_atomic_check,
+	.atomic_update = sti_cursor_atomic_update,
+	.atomic_disable = sti_cursor_atomic_disable,
+};
+
+static void sti_cursor_destroy(struct drm_plane *drm_plane)
+{
+	DRM_DEBUG_DRIVER("\n");
+
+	drm_plane_cleanup(drm_plane);
+}
+
+static int sti_cursor_late_register(struct drm_plane *drm_plane)
+{
+	struct sti_plane *plane = to_sti_plane(drm_plane);
+	struct sti_cursor *cursor = to_sti_cursor(plane);
+
+	cursor_debugfs_init(cursor, drm_plane->dev->primary);
+
+	return 0;
+}
+
+static const struct drm_plane_funcs sti_cursor_plane_helpers_funcs = {
+	.update_plane = drm_atomic_helper_update_plane,
+	.disable_plane = drm_atomic_helper_disable_plane,
+	.destroy = sti_cursor_destroy,
+	.reset = sti_plane_reset,
+	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
+	.late_register = sti_cursor_late_register,
+};
+
+struct drm_plane *sti_cursor_create(struct drm_device *drm_dev,
+				    struct device *dev, int desc,
+				    void __iomem *baseaddr,
+				    unsigned int possible_crtcs)
+{
+	struct sti_cursor *cursor;
+	size_t size;
+	int res;
+
+	cursor = devm_kzalloc(dev, sizeof(*cursor), GFP_KERNEL);
+	if (!cursor) {
+		DRM_ERROR("Failed to allocate memory for cursor\n");
+		return NULL;
+	}
+
+	/* Allocate clut buffer */
+	size = 0x100 * sizeof(unsigned short);
+	cursor->clut = dma_alloc_wc(dev, size, &cursor->clut_paddr,
+				    GFP_KERNEL | GFP_DMA);
+
+	if (!cursor->clut) {
+		DRM_ERROR("Failed to allocate memory for cursor clut\n");
+		goto err_clut;
+	}
+
+	cursor->dev = dev;
+	cursor->regs = baseaddr;
+	cursor->plane.desc = desc;
+	cursor->plane.status = STI_PLANE_DISABLED;
+
+	sti_cursor_init(cursor);
+
+	res = drm_universal_plane_init(drm_dev, &cursor->plane.drm_plane,
+				       possible_crtcs,
+				       &sti_cursor_plane_helpers_funcs,
+				       cursor_supported_formats,
+				       ARRAY_SIZE(cursor_supported_formats),
+				       NULL, DRM_PLANE_TYPE_CURSOR, NULL);
+	if (res) {
+		DRM_ERROR("Failed to initialize universal plane\n");
+		goto err_plane;
+	}
+
+	drm_plane_helper_add(&cursor->plane.drm_plane,
+			     &sti_cursor_helpers_funcs);
+
+	sti_plane_init_property(&cursor->plane, DRM_PLANE_TYPE_CURSOR);
+
+	return &cursor->plane.drm_plane;
+
+err_plane:
+	dma_free_wc(dev, size, cursor->clut, cursor->clut_paddr);
+err_clut:
+	devm_kfree(dev, cursor);
+	return NULL;
+}