1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) STMicroelectronics SA 2014
6 * for STMicroelectronics.
8 #include <linux/seq_file.h>
10 #include "sti_compositor.h"
11 #include "sti_mixer.h"
14 /* Module parameter to set the background color of the mixer */
15 static unsigned int bkg_color = 0x000000;
16 MODULE_PARM_DESC(bkgcolor, "Value of the background color 0xRRGGBB");
17 module_param_named(bkgcolor, bkg_color, int, 0644);
20 #define GAM_MIXER_CTL 0x00
21 #define GAM_MIXER_BKC 0x04
22 #define GAM_MIXER_BCO 0x0C
23 #define GAM_MIXER_BCS 0x10
24 #define GAM_MIXER_AVO 0x28
25 #define GAM_MIXER_AVS 0x2C
26 #define GAM_MIXER_CRB 0x34
27 #define GAM_MIXER_ACT 0x38
28 #define GAM_MIXER_MBP 0x3C
29 #define GAM_MIXER_MX0 0x80
31 /* id for depth of CRB reg */
32 #define GAM_DEPTH_VID0_ID 1
33 #define GAM_DEPTH_VID1_ID 2
34 #define GAM_DEPTH_GDP0_ID 3
35 #define GAM_DEPTH_GDP1_ID 4
36 #define GAM_DEPTH_GDP2_ID 5
37 #define GAM_DEPTH_GDP3_ID 6
38 #define GAM_DEPTH_MASK_ID 7
41 #define GAM_CTL_BACK_MASK BIT(0)
42 #define GAM_CTL_VID0_MASK BIT(1)
43 #define GAM_CTL_VID1_MASK BIT(2)
44 #define GAM_CTL_GDP0_MASK BIT(3)
45 #define GAM_CTL_GDP1_MASK BIT(4)
46 #define GAM_CTL_GDP2_MASK BIT(5)
47 #define GAM_CTL_GDP3_MASK BIT(6)
48 #define GAM_CTL_CURSOR_MASK BIT(9)
50 const char *sti_mixer_to_str(struct sti_mixer *mixer)
58 return "<UNKNOWN MIXER>";
62 static inline u32 sti_mixer_reg_read(struct sti_mixer *mixer, u32 reg_id)
64 return readl(mixer->regs + reg_id);
67 static inline void sti_mixer_reg_write(struct sti_mixer *mixer,
70 writel(val, mixer->regs + reg_id);
73 #define DBGFS_DUMP(reg) seq_printf(s, "\n %-25s 0x%08X", #reg, \
74 sti_mixer_reg_read(mixer, reg))
76 static void mixer_dbg_ctl(struct seq_file *s, int val)
80 char *const disp_layer[] = {"BKG", "VID0", "VID1", "GDP0",
81 "GDP1", "GDP2", "GDP3"};
83 seq_puts(s, "\tEnabled: ");
84 for (i = 0; i < 7; i++) {
86 seq_printf(s, "%s ", disp_layer[i]);
98 seq_puts(s, "Nothing");
101 static void mixer_dbg_crb(struct seq_file *s, int val)
105 seq_puts(s, "\tDepth: ");
106 for (i = 0; i < GAM_MIXER_NB_DEPTH_LEVEL; i++) {
107 switch (val & GAM_DEPTH_MASK_ID) {
108 case GAM_DEPTH_VID0_ID:
111 case GAM_DEPTH_VID1_ID:
114 case GAM_DEPTH_GDP0_ID:
117 case GAM_DEPTH_GDP1_ID:
120 case GAM_DEPTH_GDP2_ID:
123 case GAM_DEPTH_GDP3_ID:
130 if (i < GAM_MIXER_NB_DEPTH_LEVEL - 1)
136 static void mixer_dbg_mxn(struct seq_file *s, void *addr)
140 for (i = 1; i < 8; i++)
141 seq_printf(s, "-0x%08X", (int)readl(addr + i * 4));
144 static int mixer_dbg_show(struct seq_file *s, void *arg)
146 struct drm_info_node *node = s->private;
147 struct sti_mixer *mixer = (struct sti_mixer *)node->info_ent->data;
149 seq_printf(s, "%s: (vaddr = 0x%p)",
150 sti_mixer_to_str(mixer), mixer->regs);
152 DBGFS_DUMP(GAM_MIXER_CTL);
153 mixer_dbg_ctl(s, sti_mixer_reg_read(mixer, GAM_MIXER_CTL));
154 DBGFS_DUMP(GAM_MIXER_BKC);
155 DBGFS_DUMP(GAM_MIXER_BCO);
156 DBGFS_DUMP(GAM_MIXER_BCS);
157 DBGFS_DUMP(GAM_MIXER_AVO);
158 DBGFS_DUMP(GAM_MIXER_AVS);
159 DBGFS_DUMP(GAM_MIXER_CRB);
160 mixer_dbg_crb(s, sti_mixer_reg_read(mixer, GAM_MIXER_CRB));
161 DBGFS_DUMP(GAM_MIXER_ACT);
162 DBGFS_DUMP(GAM_MIXER_MBP);
163 DBGFS_DUMP(GAM_MIXER_MX0);
164 mixer_dbg_mxn(s, mixer->regs + GAM_MIXER_MX0);
169 static struct drm_info_list mixer0_debugfs_files[] = {
170 { "mixer_main", mixer_dbg_show, 0, NULL },
173 static struct drm_info_list mixer1_debugfs_files[] = {
174 { "mixer_aux", mixer_dbg_show, 0, NULL },
177 int sti_mixer_debugfs_init(struct sti_mixer *mixer, struct drm_minor *minor)
180 struct drm_info_list *mixer_debugfs_files;
185 mixer_debugfs_files = mixer0_debugfs_files;
186 nb_files = ARRAY_SIZE(mixer0_debugfs_files);
189 mixer_debugfs_files = mixer1_debugfs_files;
190 nb_files = ARRAY_SIZE(mixer1_debugfs_files);
196 for (i = 0; i < nb_files; i++)
197 mixer_debugfs_files[i].data = mixer;
199 return drm_debugfs_create_files(mixer_debugfs_files,
201 minor->debugfs_root, minor);
204 void sti_mixer_set_background_status(struct sti_mixer *mixer, bool enable)
206 u32 val = sti_mixer_reg_read(mixer, GAM_MIXER_CTL);
208 val &= ~GAM_CTL_BACK_MASK;
210 sti_mixer_reg_write(mixer, GAM_MIXER_CTL, val);
213 static void sti_mixer_set_background_color(struct sti_mixer *mixer,
216 sti_mixer_reg_write(mixer, GAM_MIXER_BKC, rgb);
219 static void sti_mixer_set_background_area(struct sti_mixer *mixer,
220 struct drm_display_mode *mode)
222 u32 ydo, xdo, yds, xds;
224 ydo = sti_vtg_get_line_number(*mode, 0);
225 yds = sti_vtg_get_line_number(*mode, mode->vdisplay - 1);
226 xdo = sti_vtg_get_pixel_number(*mode, 0);
227 xds = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1);
229 sti_mixer_reg_write(mixer, GAM_MIXER_BCO, ydo << 16 | xdo);
230 sti_mixer_reg_write(mixer, GAM_MIXER_BCS, yds << 16 | xds);
233 int sti_mixer_set_plane_depth(struct sti_mixer *mixer, struct sti_plane *plane)
235 int plane_id, depth = plane->drm_plane.state->normalized_zpos;
239 switch (plane->desc) {
241 plane_id = GAM_DEPTH_GDP0_ID;
244 plane_id = GAM_DEPTH_GDP1_ID;
247 plane_id = GAM_DEPTH_GDP2_ID;
250 plane_id = GAM_DEPTH_GDP3_ID;
253 plane_id = GAM_DEPTH_VID0_ID;
256 /* no need to set depth for cursor */
259 DRM_ERROR("Unknown plane %d\n", plane->desc);
263 /* Search if a previous depth was already assigned to the plane */
264 val = sti_mixer_reg_read(mixer, GAM_MIXER_CRB);
265 for (i = 0; i < GAM_MIXER_NB_DEPTH_LEVEL; i++) {
266 mask = GAM_DEPTH_MASK_ID << (3 * i);
267 if ((val & mask) == plane_id << (3 * i))
271 mask |= GAM_DEPTH_MASK_ID << (3 * depth);
272 plane_id = plane_id << (3 * depth);
274 DRM_DEBUG_DRIVER("%s %s depth=%d\n", sti_mixer_to_str(mixer),
275 sti_plane_to_str(plane), depth);
276 dev_dbg(mixer->dev, "GAM_MIXER_CRB val 0x%x mask 0x%x\n",
281 sti_mixer_reg_write(mixer, GAM_MIXER_CRB, val);
283 dev_dbg(mixer->dev, "Read GAM_MIXER_CRB 0x%x\n",
284 sti_mixer_reg_read(mixer, GAM_MIXER_CRB));
288 int sti_mixer_active_video_area(struct sti_mixer *mixer,
289 struct drm_display_mode *mode)
291 u32 ydo, xdo, yds, xds;
293 ydo = sti_vtg_get_line_number(*mode, 0);
294 yds = sti_vtg_get_line_number(*mode, mode->vdisplay - 1);
295 xdo = sti_vtg_get_pixel_number(*mode, 0);
296 xds = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1);
298 DRM_DEBUG_DRIVER("%s active video area xdo:%d ydo:%d xds:%d yds:%d\n",
299 sti_mixer_to_str(mixer), xdo, ydo, xds, yds);
300 sti_mixer_reg_write(mixer, GAM_MIXER_AVO, ydo << 16 | xdo);
301 sti_mixer_reg_write(mixer, GAM_MIXER_AVS, yds << 16 | xds);
303 sti_mixer_set_background_color(mixer, bkg_color);
305 sti_mixer_set_background_area(mixer, mode);
306 sti_mixer_set_background_status(mixer, true);
310 static u32 sti_mixer_get_plane_mask(struct sti_plane *plane)
312 switch (plane->desc) {
314 return GAM_CTL_BACK_MASK;
316 return GAM_CTL_GDP0_MASK;
318 return GAM_CTL_GDP1_MASK;
320 return GAM_CTL_GDP2_MASK;
322 return GAM_CTL_GDP3_MASK;
324 return GAM_CTL_VID0_MASK;
326 return GAM_CTL_CURSOR_MASK;
332 int sti_mixer_set_plane_status(struct sti_mixer *mixer,
333 struct sti_plane *plane, bool status)
337 DRM_DEBUG_DRIVER("%s %s %s\n", status ? "enable" : "disable",
338 sti_mixer_to_str(mixer), sti_plane_to_str(plane));
340 mask = sti_mixer_get_plane_mask(plane);
342 DRM_ERROR("Can't find layer mask\n");
346 val = sti_mixer_reg_read(mixer, GAM_MIXER_CTL);
348 val |= status ? mask : 0;
349 sti_mixer_reg_write(mixer, GAM_MIXER_CTL, val);
354 struct sti_mixer *sti_mixer_create(struct device *dev,
355 struct drm_device *drm_dev,
357 void __iomem *baseaddr)
359 struct sti_mixer *mixer = devm_kzalloc(dev, sizeof(*mixer), GFP_KERNEL);
361 dev_dbg(dev, "%s\n", __func__);
363 DRM_ERROR("Failed to allocated memory for mixer\n");
366 mixer->regs = baseaddr;
370 DRM_DEBUG_DRIVER("%s created. Regs=%p\n",
371 sti_mixer_to_str(mixer), mixer->regs);