1
2
3
4
5
6
7
8#include <drm/drmP.h>
9
10#include "sti_cursor.h"
11#include "sti_layer.h"
12#include "sti_vtg.h"
13
14
15#define CUR_CTL 0x00
16#define CUR_VPO 0x0C
17#define CUR_PML 0x14
18#define CUR_PMP 0x18
19#define CUR_SIZE 0x1C
20#define CUR_CML 0x20
21#define CUR_AWS 0x28
22#define CUR_AWE 0x2C
23
24#define CUR_CTL_CLUT_UPDATE BIT(1)
25
26#define STI_CURS_MIN_SIZE 1
27#define STI_CURS_MAX_SIZE 128
28
29
30
31
32
33
34
35
36struct dma_pixmap {
37 dma_addr_t paddr;
38 size_t size;
39 void *base;
40};
41
42
43
44
45
46
47
48
49
50
51
52struct sti_cursor {
53 struct sti_layer layer;
54 unsigned int width;
55 unsigned int height;
56 unsigned short *clut;
57 dma_addr_t clut_paddr;
58 struct dma_pixmap pixmap;
59};
60
61static const uint32_t cursor_supported_formats[] = {
62 DRM_FORMAT_ARGB8888,
63};
64
65#define to_sti_cursor(x) container_of(x, struct sti_cursor, layer)
66
67static const uint32_t *sti_cursor_get_formats(struct sti_layer *layer)
68{
69 return cursor_supported_formats;
70}
71
72static unsigned int sti_cursor_get_nb_formats(struct sti_layer *layer)
73{
74 return ARRAY_SIZE(cursor_supported_formats);
75}
76
77static void sti_cursor_argb8888_to_clut8(struct sti_layer *layer)
78{
79 struct sti_cursor *cursor = to_sti_cursor(layer);
80 u32 *src = layer->vaddr;
81 u8 *dst = cursor->pixmap.base;
82 unsigned int i, j;
83 u32 a, r, g, b;
84
85 for (i = 0; i < cursor->height; i++) {
86 for (j = 0; j < cursor->width; j++) {
87
88 a = (*src >> 30) & 3;
89 r = (*src >> 22) & 3;
90 g = (*src >> 14) & 3;
91 b = (*src >> 6) & 3;
92 *dst = a << 6 | r << 4 | g << 2 | b;
93 src++;
94 dst++;
95 }
96 }
97}
98
99static int sti_cursor_prepare_layer(struct sti_layer *layer, bool first_prepare)
100{
101 struct sti_cursor *cursor = to_sti_cursor(layer);
102 struct drm_display_mode *mode = layer->mode;
103 u32 y, x;
104 u32 val;
105
106 DRM_DEBUG_DRIVER("\n");
107
108 dev_dbg(layer->dev, "%s %s\n", __func__, sti_layer_to_str(layer));
109
110 if (layer->src_w < STI_CURS_MIN_SIZE ||
111 layer->src_h < STI_CURS_MIN_SIZE ||
112 layer->src_w > STI_CURS_MAX_SIZE ||
113 layer->src_h > STI_CURS_MAX_SIZE) {
114 DRM_ERROR("Invalid cursor size (%dx%d)\n",
115 layer->src_w, layer->src_h);
116 return -EINVAL;
117 }
118
119
120 if (!cursor->pixmap.base ||
121 (cursor->width != layer->src_w) ||
122 (cursor->height != layer->src_h)) {
123 cursor->width = layer->src_w;
124 cursor->height = layer->src_h;
125
126 if (cursor->pixmap.base)
127 dma_free_writecombine(layer->dev,
128 cursor->pixmap.size,
129 cursor->pixmap.base,
130 cursor->pixmap.paddr);
131
132 cursor->pixmap.size = cursor->width * cursor->height;
133
134 cursor->pixmap.base = dma_alloc_writecombine(layer->dev,
135 cursor->pixmap.size,
136 &cursor->pixmap.paddr,
137 GFP_KERNEL | GFP_DMA);
138 if (!cursor->pixmap.base) {
139 DRM_ERROR("Failed to allocate memory for pixmap\n");
140 return -ENOMEM;
141 }
142 }
143
144
145 sti_cursor_argb8888_to_clut8(layer);
146
147
148 y = sti_vtg_get_line_number(*mode, 0);
149 x = sti_vtg_get_pixel_number(*mode, 0);
150 val = y << 16 | x;
151 writel(val, layer->regs + CUR_AWS);
152 y = sti_vtg_get_line_number(*mode, mode->vdisplay - 1);
153 x = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1);
154 val = y << 16 | x;
155 writel(val, layer->regs + CUR_AWE);
156
157 if (first_prepare) {
158
159 writel(cursor->clut_paddr, layer->regs + CUR_CML);
160 writel(CUR_CTL_CLUT_UPDATE, layer->regs + CUR_CTL);
161 }
162
163 return 0;
164}
165
166static int sti_cursor_commit_layer(struct sti_layer *layer)
167{
168 struct sti_cursor *cursor = to_sti_cursor(layer);
169 struct drm_display_mode *mode = layer->mode;
170 u32 ydo, xdo;
171
172 dev_dbg(layer->dev, "%s %s\n", __func__, sti_layer_to_str(layer));
173
174
175 writel(cursor->pixmap.paddr, layer->regs + CUR_PML);
176 writel(cursor->width, layer->regs + CUR_PMP);
177 writel(cursor->height << 16 | cursor->width, layer->regs + CUR_SIZE);
178
179 ydo = sti_vtg_get_line_number(*mode, layer->dst_y);
180 xdo = sti_vtg_get_pixel_number(*mode, layer->dst_y);
181 writel((ydo << 16) | xdo, layer->regs + CUR_VPO);
182
183 return 0;
184}
185
186static int sti_cursor_disable_layer(struct sti_layer *layer)
187{
188 return 0;
189}
190
191static void sti_cursor_init(struct sti_layer *layer)
192{
193 struct sti_cursor *cursor = to_sti_cursor(layer);
194 unsigned short *base = cursor->clut;
195 unsigned int a, r, g, b;
196
197
198 for (a = 0; a < 4; a++)
199 for (r = 0; r < 4; r++)
200 for (g = 0; g < 4; g++)
201 for (b = 0; b < 4; b++)
202 *base++ = (a * 5) << 12 |
203 (r * 5) << 8 |
204 (g * 5) << 4 |
205 (b * 5);
206}
207
208static const struct sti_layer_funcs cursor_ops = {
209 .get_formats = sti_cursor_get_formats,
210 .get_nb_formats = sti_cursor_get_nb_formats,
211 .init = sti_cursor_init,
212 .prepare = sti_cursor_prepare_layer,
213 .commit = sti_cursor_commit_layer,
214 .disable = sti_cursor_disable_layer,
215};
216
217struct sti_layer *sti_cursor_create(struct device *dev)
218{
219 struct sti_cursor *cursor;
220
221 cursor = devm_kzalloc(dev, sizeof(*cursor), GFP_KERNEL);
222 if (!cursor) {
223 DRM_ERROR("Failed to allocate memory for cursor\n");
224 return NULL;
225 }
226
227
228 cursor->clut = dma_alloc_writecombine(dev,
229 0x100 * sizeof(unsigned short),
230 &cursor->clut_paddr,
231 GFP_KERNEL | GFP_DMA);
232
233 if (!cursor->clut) {
234 DRM_ERROR("Failed to allocate memory for cursor clut\n");
235 devm_kfree(dev, cursor);
236 return NULL;
237 }
238
239 cursor->layer.ops = &cursor_ops;
240
241 return (struct sti_layer *)cursor;
242}
243
