1 /* Hisilicon Hibmc SoC drm driver
3 * Based on the bochs drm driver.
5 * Copyright (c) 2016 Huawei Limited.
8 * Rongrong Zou <zourongrong@huawei.com>
9 * Rongrong Zou <zourongrong@gmail.com>
10 * Jianhua Li <lijianhua@huawei.com>
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
19 #include <drm/drm_atomic.h>
20 #include <drm/drm_atomic_helper.h>
21 #include <drm/drm_crtc_helper.h>
22 #include <drm/drm_plane_helper.h>
24 #include "hibmc_drm_drv.h"
25 #include "hibmc_drm_regs.h"
27 struct hibmc_display_panel_pll {
34 struct hibmc_dislay_pll_config {
35 unsigned long hdisplay;
36 unsigned long vdisplay;
37 u32 pll1_config_value;
38 u32 pll2_config_value;
41 static const struct hibmc_dislay_pll_config hibmc_pll_table[] = {
42 {800, 600, CRT_PLL1_HS_40MHZ, CRT_PLL2_HS_40MHZ},
43 {1024, 768, CRT_PLL1_HS_65MHZ, CRT_PLL2_HS_65MHZ},
44 {1152, 864, CRT_PLL1_HS_80MHZ_1152, CRT_PLL2_HS_80MHZ},
45 {1280, 768, CRT_PLL1_HS_80MHZ, CRT_PLL2_HS_80MHZ},
46 {1280, 720, CRT_PLL1_HS_74MHZ, CRT_PLL2_HS_74MHZ},
47 {1280, 960, CRT_PLL1_HS_108MHZ, CRT_PLL2_HS_108MHZ},
48 {1280, 1024, CRT_PLL1_HS_108MHZ, CRT_PLL2_HS_108MHZ},
49 {1600, 1200, CRT_PLL1_HS_162MHZ, CRT_PLL2_HS_162MHZ},
50 {1920, 1080, CRT_PLL1_HS_148MHZ, CRT_PLL2_HS_148MHZ},
51 {1920, 1200, CRT_PLL1_HS_193MHZ, CRT_PLL2_HS_193MHZ},
54 #define PADDING(align, data) (((data) + (align) - 1) & (~((align) - 1)))
56 static int hibmc_plane_atomic_check(struct drm_plane *plane,
57 struct drm_plane_state *state)
59 struct drm_framebuffer *fb = state->fb;
60 struct drm_crtc *crtc = state->crtc;
61 struct drm_crtc_state *crtc_state;
62 u32 src_w = state->src_w >> 16;
63 u32 src_h = state->src_h >> 16;
68 crtc_state = drm_atomic_get_crtc_state(state->state, crtc);
69 if (IS_ERR(crtc_state))
70 return PTR_ERR(crtc_state);
72 if (src_w != state->crtc_w || src_h != state->crtc_h) {
73 DRM_DEBUG_ATOMIC("scale not support\n");
77 if (state->crtc_x < 0 || state->crtc_y < 0) {
78 DRM_DEBUG_ATOMIC("crtc_x/y of drm_plane state is invalid\n");
82 if (state->crtc_x + state->crtc_w >
83 crtc_state->adjusted_mode.hdisplay ||
84 state->crtc_y + state->crtc_h >
85 crtc_state->adjusted_mode.vdisplay) {
86 DRM_DEBUG_ATOMIC("visible portion of plane is invalid\n");
93 static void hibmc_plane_atomic_update(struct drm_plane *plane,
94 struct drm_plane_state *old_state)
96 struct drm_plane_state *state = plane->state;
101 struct hibmc_drm_private *priv = plane->dev->dev_private;
102 struct hibmc_framebuffer *hibmc_fb;
108 hibmc_fb = to_hibmc_framebuffer(state->fb);
109 bo = gem_to_hibmc_bo(hibmc_fb->obj);
110 ret = ttm_bo_reserve(&bo->bo, true, false, NULL);
112 DRM_ERROR("failed to reserve ttm_bo: %d", ret);
116 ret = hibmc_bo_pin(bo, TTM_PL_FLAG_VRAM, &gpu_addr);
117 ttm_bo_unreserve(&bo->bo);
119 DRM_ERROR("failed to pin hibmc_bo: %d", ret);
123 writel(gpu_addr, priv->mmio + HIBMC_CRT_FB_ADDRESS);
125 reg = state->fb->width * (state->fb->format->cpp[0]);
126 /* now line_pad is 16 */
127 reg = PADDING(16, reg);
129 line_l = state->fb->width * state->fb->format->cpp[0];
130 line_l = PADDING(16, line_l);
131 writel(HIBMC_FIELD(HIBMC_CRT_FB_WIDTH_WIDTH, reg) |
132 HIBMC_FIELD(HIBMC_CRT_FB_WIDTH_OFFS, line_l),
133 priv->mmio + HIBMC_CRT_FB_WIDTH);
135 /* SET PIXEL FORMAT */
136 reg = readl(priv->mmio + HIBMC_CRT_DISP_CTL);
137 reg &= ~HIBMC_CRT_DISP_CTL_FORMAT_MASK;
138 reg |= HIBMC_FIELD(HIBMC_CRT_DISP_CTL_FORMAT,
139 state->fb->format->cpp[0] * 8 / 16);
140 writel(reg, priv->mmio + HIBMC_CRT_DISP_CTL);
143 static const u32 channel_formats1[] = {
144 DRM_FORMAT_RGB565, DRM_FORMAT_BGR565, DRM_FORMAT_RGB888,
145 DRM_FORMAT_BGR888, DRM_FORMAT_XRGB8888, DRM_FORMAT_XBGR8888,
146 DRM_FORMAT_RGBA8888, DRM_FORMAT_BGRA8888, DRM_FORMAT_ARGB8888,
150 static struct drm_plane_funcs hibmc_plane_funcs = {
151 .update_plane = drm_atomic_helper_update_plane,
152 .disable_plane = drm_atomic_helper_disable_plane,
153 .set_property = drm_atomic_helper_plane_set_property,
154 .destroy = drm_plane_cleanup,
155 .reset = drm_atomic_helper_plane_reset,
156 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
157 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
160 static const struct drm_plane_helper_funcs hibmc_plane_helper_funcs = {
161 .atomic_check = hibmc_plane_atomic_check,
162 .atomic_update = hibmc_plane_atomic_update,
165 static struct drm_plane *hibmc_plane_init(struct hibmc_drm_private *priv)
167 struct drm_device *dev = priv->dev;
168 struct drm_plane *plane;
171 plane = devm_kzalloc(dev->dev, sizeof(*plane), GFP_KERNEL);
173 DRM_ERROR("failed to alloc memory when init plane\n");
174 return ERR_PTR(-ENOMEM);
178 * TODO: Now only support primary plane, overlay planes
181 ret = drm_universal_plane_init(dev, plane, 1, &hibmc_plane_funcs,
183 ARRAY_SIZE(channel_formats1),
184 DRM_PLANE_TYPE_PRIMARY,
187 DRM_ERROR("failed to init plane: %d\n", ret);
191 drm_plane_helper_add(plane, &hibmc_plane_helper_funcs);
195 static void hibmc_crtc_enable(struct drm_crtc *crtc)
198 struct hibmc_drm_private *priv = crtc->dev->dev_private;
200 hibmc_set_power_mode(priv, HIBMC_PW_MODE_CTL_MODE_MODE0);
202 /* Enable display power gate & LOCALMEM power gate*/
203 reg = readl(priv->mmio + HIBMC_CURRENT_GATE);
204 reg &= ~HIBMC_CURR_GATE_LOCALMEM_MASK;
205 reg &= ~HIBMC_CURR_GATE_DISPLAY_MASK;
206 reg |= HIBMC_CURR_GATE_LOCALMEM(1);
207 reg |= HIBMC_CURR_GATE_DISPLAY(1);
208 hibmc_set_current_gate(priv, reg);
209 drm_crtc_vblank_on(crtc);
212 static void hibmc_crtc_disable(struct drm_crtc *crtc)
215 struct hibmc_drm_private *priv = crtc->dev->dev_private;
217 drm_crtc_vblank_off(crtc);
219 hibmc_set_power_mode(priv, HIBMC_PW_MODE_CTL_MODE_SLEEP);
221 /* Enable display power gate & LOCALMEM power gate*/
222 reg = readl(priv->mmio + HIBMC_CURRENT_GATE);
223 reg &= ~HIBMC_CURR_GATE_LOCALMEM_MASK;
224 reg &= ~HIBMC_CURR_GATE_DISPLAY_MASK;
225 reg |= HIBMC_CURR_GATE_LOCALMEM(0);
226 reg |= HIBMC_CURR_GATE_DISPLAY(0);
227 hibmc_set_current_gate(priv, reg);
230 static unsigned int format_pll_reg(void)
232 unsigned int pllreg = 0;
233 struct hibmc_display_panel_pll pll = {0};
236 * Note that all PLL's have the same format. Here,
237 * we just use Panel PLL parameter to work out the bit
238 * fields in the register.On returning a 32 bit number, the value can
239 * be applied to any PLL in the calling function.
241 pllreg |= HIBMC_FIELD(HIBMC_PLL_CTRL_BYPASS, 0);
242 pllreg |= HIBMC_FIELD(HIBMC_PLL_CTRL_POWER, 1);
243 pllreg |= HIBMC_FIELD(HIBMC_PLL_CTRL_INPUT, 0);
244 pllreg |= HIBMC_FIELD(HIBMC_PLL_CTRL_POD, pll.POD);
245 pllreg |= HIBMC_FIELD(HIBMC_PLL_CTRL_OD, pll.OD);
246 pllreg |= HIBMC_FIELD(HIBMC_PLL_CTRL_N, pll.N);
247 pllreg |= HIBMC_FIELD(HIBMC_PLL_CTRL_M, pll.M);
252 static void set_vclock_hisilicon(struct drm_device *dev, unsigned long pll)
255 struct hibmc_drm_private *priv = dev->dev_private;
257 val = readl(priv->mmio + CRT_PLL1_HS);
258 val &= ~(CRT_PLL1_HS_OUTER_BYPASS(1));
259 writel(val, priv->mmio + CRT_PLL1_HS);
261 val = CRT_PLL1_HS_INTER_BYPASS(1) | CRT_PLL1_HS_POWERON(1);
262 writel(val, priv->mmio + CRT_PLL1_HS);
264 writel(pll, priv->mmio + CRT_PLL1_HS);
266 usleep_range(1000, 2000);
268 val = pll & ~(CRT_PLL1_HS_POWERON(1));
269 writel(val, priv->mmio + CRT_PLL1_HS);
271 usleep_range(1000, 2000);
273 val &= ~(CRT_PLL1_HS_INTER_BYPASS(1));
274 writel(val, priv->mmio + CRT_PLL1_HS);
276 usleep_range(1000, 2000);
278 val |= CRT_PLL1_HS_OUTER_BYPASS(1);
279 writel(val, priv->mmio + CRT_PLL1_HS);
282 static void get_pll_config(unsigned long x, unsigned long y,
283 u32 *pll1, u32 *pll2)
286 int count = ARRAY_SIZE(hibmc_pll_table);
288 for (i = 0; i < count; i++) {
289 if (hibmc_pll_table[i].hdisplay == x &&
290 hibmc_pll_table[i].vdisplay == y) {
291 *pll1 = hibmc_pll_table[i].pll1_config_value;
292 *pll2 = hibmc_pll_table[i].pll2_config_value;
297 /* if found none, we use default value */
298 *pll1 = CRT_PLL1_HS_25MHZ;
299 *pll2 = CRT_PLL2_HS_25MHZ;
303 * This function takes care the extra registers and bit fields required to
304 * setup a mode in board.
305 * Explanation about Display Control register:
306 * FPGA only supports 7 predefined pixel clocks, and clock select is
307 * in bit 4:0 of new register 0x802a8.
309 static unsigned int display_ctrl_adjust(struct drm_device *dev,
310 struct drm_display_mode *mode,
314 u32 pll1; /* bit[31:0] of PLL */
315 u32 pll2; /* bit[63:32] of PLL */
316 struct hibmc_drm_private *priv = dev->dev_private;
321 get_pll_config(x, y, &pll1, &pll2);
322 writel(pll2, priv->mmio + CRT_PLL2_HS);
323 set_vclock_hisilicon(dev, pll1);
326 * Hisilicon has to set up the top-left and bottom-right
328 * Note that normal chip only use those two register for
329 * auto-centering mode.
331 writel(HIBMC_FIELD(HIBMC_CRT_AUTO_CENTERING_TL_TOP, 0) |
332 HIBMC_FIELD(HIBMC_CRT_AUTO_CENTERING_TL_LEFT, 0),
333 priv->mmio + HIBMC_CRT_AUTO_CENTERING_TL);
335 writel(HIBMC_FIELD(HIBMC_CRT_AUTO_CENTERING_BR_BOTTOM, y - 1) |
336 HIBMC_FIELD(HIBMC_CRT_AUTO_CENTERING_BR_RIGHT, x - 1),
337 priv->mmio + HIBMC_CRT_AUTO_CENTERING_BR);
340 * Assume common fields in ctrl have been properly set before
341 * calling this function.
342 * This function only sets the extra fields in ctrl.
345 /* Set bit 25 of display controller: Select CRT or VGA clock */
346 ctrl &= ~HIBMC_CRT_DISP_CTL_CRTSELECT_MASK;
347 ctrl &= ~HIBMC_CRT_DISP_CTL_CLOCK_PHASE_MASK;
349 ctrl |= HIBMC_CRT_DISP_CTL_CRTSELECT(HIBMC_CRTSELECT_CRT);
351 /* clock_phase_polarity is 0 */
352 ctrl |= HIBMC_CRT_DISP_CTL_CLOCK_PHASE(0);
354 writel(ctrl, priv->mmio + HIBMC_CRT_DISP_CTL);
359 static void hibmc_crtc_mode_set_nofb(struct drm_crtc *crtc)
362 struct drm_display_mode *mode = &crtc->state->mode;
363 struct drm_device *dev = crtc->dev;
364 struct hibmc_drm_private *priv = dev->dev_private;
365 int width = mode->hsync_end - mode->hsync_start;
366 int height = mode->vsync_end - mode->vsync_start;
368 writel(format_pll_reg(), priv->mmio + HIBMC_CRT_PLL_CTRL);
369 writel(HIBMC_FIELD(HIBMC_CRT_HORZ_TOTAL_TOTAL, mode->htotal - 1) |
370 HIBMC_FIELD(HIBMC_CRT_HORZ_TOTAL_DISP_END, mode->hdisplay - 1),
371 priv->mmio + HIBMC_CRT_HORZ_TOTAL);
373 writel(HIBMC_FIELD(HIBMC_CRT_HORZ_SYNC_WIDTH, width) |
374 HIBMC_FIELD(HIBMC_CRT_HORZ_SYNC_START, mode->hsync_start - 1),
375 priv->mmio + HIBMC_CRT_HORZ_SYNC);
377 writel(HIBMC_FIELD(HIBMC_CRT_VERT_TOTAL_TOTAL, mode->vtotal - 1) |
378 HIBMC_FIELD(HIBMC_CRT_VERT_TOTAL_DISP_END, mode->vdisplay - 1),
379 priv->mmio + HIBMC_CRT_VERT_TOTAL);
381 writel(HIBMC_FIELD(HIBMC_CRT_VERT_SYNC_HEIGHT, height) |
382 HIBMC_FIELD(HIBMC_CRT_VERT_SYNC_START, mode->vsync_start - 1),
383 priv->mmio + HIBMC_CRT_VERT_SYNC);
385 val = HIBMC_FIELD(HIBMC_CRT_DISP_CTL_VSYNC_PHASE, 0);
386 val |= HIBMC_FIELD(HIBMC_CRT_DISP_CTL_HSYNC_PHASE, 0);
387 val |= HIBMC_CRT_DISP_CTL_TIMING(1);
388 val |= HIBMC_CRT_DISP_CTL_PLANE(1);
390 display_ctrl_adjust(dev, mode, val);
393 static void hibmc_crtc_atomic_begin(struct drm_crtc *crtc,
394 struct drm_crtc_state *old_state)
397 struct drm_device *dev = crtc->dev;
398 struct hibmc_drm_private *priv = dev->dev_private;
400 hibmc_set_power_mode(priv, HIBMC_PW_MODE_CTL_MODE_MODE0);
402 /* Enable display power gate & LOCALMEM power gate*/
403 reg = readl(priv->mmio + HIBMC_CURRENT_GATE);
404 reg &= ~HIBMC_CURR_GATE_DISPLAY_MASK;
405 reg &= ~HIBMC_CURR_GATE_LOCALMEM_MASK;
406 reg |= HIBMC_CURR_GATE_DISPLAY(1);
407 reg |= HIBMC_CURR_GATE_LOCALMEM(1);
408 hibmc_set_current_gate(priv, reg);
410 /* We can add more initialization as needed. */
413 static void hibmc_crtc_atomic_flush(struct drm_crtc *crtc,
414 struct drm_crtc_state *old_state)
419 spin_lock_irqsave(&crtc->dev->event_lock, flags);
420 if (crtc->state->event)
421 drm_crtc_send_vblank_event(crtc, crtc->state->event);
422 crtc->state->event = NULL;
423 spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
426 static const struct drm_crtc_funcs hibmc_crtc_funcs = {
427 .page_flip = drm_atomic_helper_page_flip,
428 .set_config = drm_atomic_helper_set_config,
429 .destroy = drm_crtc_cleanup,
430 .reset = drm_atomic_helper_crtc_reset,
431 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
432 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
435 static const struct drm_crtc_helper_funcs hibmc_crtc_helper_funcs = {
436 .enable = hibmc_crtc_enable,
437 .disable = hibmc_crtc_disable,
438 .mode_set_nofb = hibmc_crtc_mode_set_nofb,
439 .atomic_begin = hibmc_crtc_atomic_begin,
440 .atomic_flush = hibmc_crtc_atomic_flush,
443 int hibmc_de_init(struct hibmc_drm_private *priv)
445 struct drm_device *dev = priv->dev;
446 struct drm_crtc *crtc;
447 struct drm_plane *plane;
450 plane = hibmc_plane_init(priv);
452 DRM_ERROR("failed to create plane: %ld\n", PTR_ERR(plane));
453 return PTR_ERR(plane);
456 crtc = devm_kzalloc(dev->dev, sizeof(*crtc), GFP_KERNEL);
458 DRM_ERROR("failed to alloc memory when init crtc\n");
462 ret = drm_crtc_init_with_planes(dev, crtc, plane,
463 NULL, &hibmc_crtc_funcs, NULL);
465 DRM_ERROR("failed to init crtc: %d\n", ret);
469 ret = drm_mode_crtc_set_gamma_size(crtc, 256);
471 DRM_ERROR("failed to set gamma size: %d\n", ret);
474 drm_crtc_helper_add(crtc, &hibmc_crtc_helper_funcs);