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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * (C) COPYRIGHT 2016 ARM Limited. All rights reserved.
- * Author: Liviu Dudau <Liviu.Dudau@arm.com>
- *
- * ARM Mali DP500/DP550/DP650 KMS/DRM driver
- */
- #include <linux/module.h>
- #include <linux/clk.h>
- #include <linux/component.h>
- #include <linux/of_device.h>
- #include <linux/of_graph.h>
- #include <linux/of_reserved_mem.h>
- #include <linux/pm_runtime.h>
- #include <linux/debugfs.h>
- #include <drm/drm_atomic.h>
- #include <drm/drm_atomic_helper.h>
- #include <drm/drm_crtc.h>
- #include <drm/drm_drv.h>
- #include <drm/drm_fb_cma_helper.h>
- #include <drm/drm_fb_helper.h>
- #include <drm/drm_fourcc.h>
- #include <drm/drm_gem_cma_helper.h>
- #include <drm/drm_gem_framebuffer_helper.h>
- #include <drm/drm_modeset_helper.h>
- #include <drm/drm_of.h>
- #include <drm/drm_probe_helper.h>
- #include <drm/drm_vblank.h>
- #include "malidp_drv.h"
- #include "malidp_mw.h"
- #include "malidp_regs.h"
- #include "malidp_hw.h"
- #define MALIDP_CONF_VALID_TIMEOUT 250
- #define AFBC_HEADER_SIZE 16
- #define AFBC_SUPERBLK_ALIGNMENT 128
- static void malidp_write_gamma_table(struct malidp_hw_device *hwdev,
- u32 data[MALIDP_COEFFTAB_NUM_COEFFS])
- {
- int i;
- /* Update all channels with a single gamma curve. */
- const u32 gamma_write_mask = GENMASK(18, 16);
- /*
- * Always write an entire table, so the address field in
- * DE_COEFFTAB_ADDR is 0 and we can use the gamma_write_mask bitmask
- * directly.
- */
- malidp_hw_write(hwdev, gamma_write_mask,
- hwdev->hw->map.coeffs_base + MALIDP_COEF_TABLE_ADDR);
- for (i = 0; i < MALIDP_COEFFTAB_NUM_COEFFS; ++i)
- malidp_hw_write(hwdev, data[i],
- hwdev->hw->map.coeffs_base +
- MALIDP_COEF_TABLE_DATA);
- }
- static void malidp_atomic_commit_update_gamma(struct drm_crtc *crtc,
- struct drm_crtc_state *old_state)
- {
- struct malidp_drm *malidp = crtc_to_malidp_device(crtc);
- struct malidp_hw_device *hwdev = malidp->dev;
- if (!crtc->state->color_mgmt_changed)
- return;
- if (!crtc->state->gamma_lut) {
- malidp_hw_clearbits(hwdev,
- MALIDP_DISP_FUNC_GAMMA,
- MALIDP_DE_DISPLAY_FUNC);
- } else {
- struct malidp_crtc_state *mc =
- to_malidp_crtc_state(crtc->state);
- if (!old_state->gamma_lut || (crtc->state->gamma_lut->base.id !=
- old_state->gamma_lut->base.id))
- malidp_write_gamma_table(hwdev, mc->gamma_coeffs);
- malidp_hw_setbits(hwdev, MALIDP_DISP_FUNC_GAMMA,
- MALIDP_DE_DISPLAY_FUNC);
- }
- }
- static
- void malidp_atomic_commit_update_coloradj(struct drm_crtc *crtc,
- struct drm_crtc_state *old_state)
- {
- struct malidp_drm *malidp = crtc_to_malidp_device(crtc);
- struct malidp_hw_device *hwdev = malidp->dev;
- int i;
- if (!crtc->state->color_mgmt_changed)
- return;
- if (!crtc->state->ctm) {
- malidp_hw_clearbits(hwdev, MALIDP_DISP_FUNC_CADJ,
- MALIDP_DE_DISPLAY_FUNC);
- } else {
- struct malidp_crtc_state *mc =
- to_malidp_crtc_state(crtc->state);
- if (!old_state->ctm || (crtc->state->ctm->base.id !=
- old_state->ctm->base.id))
- for (i = 0; i < MALIDP_COLORADJ_NUM_COEFFS; ++i)
- malidp_hw_write(hwdev,
- mc->coloradj_coeffs[i],
- hwdev->hw->map.coeffs_base +
- MALIDP_COLOR_ADJ_COEF + 4 * i);
- malidp_hw_setbits(hwdev, MALIDP_DISP_FUNC_CADJ,
- MALIDP_DE_DISPLAY_FUNC);
- }
- }
- static void malidp_atomic_commit_se_config(struct drm_crtc *crtc,
- struct drm_crtc_state *old_state)
- {
- struct malidp_crtc_state *cs = to_malidp_crtc_state(crtc->state);
- struct malidp_crtc_state *old_cs = to_malidp_crtc_state(old_state);
- struct malidp_drm *malidp = crtc_to_malidp_device(crtc);
- struct malidp_hw_device *hwdev = malidp->dev;
- struct malidp_se_config *s = &cs->scaler_config;
- struct malidp_se_config *old_s = &old_cs->scaler_config;
- u32 se_control = hwdev->hw->map.se_base +
- ((hwdev->hw->map.features & MALIDP_REGMAP_HAS_CLEARIRQ) ?
- 0x10 : 0xC);
- u32 layer_control = se_control + MALIDP_SE_LAYER_CONTROL;
- u32 scr = se_control + MALIDP_SE_SCALING_CONTROL;
- u32 val;
- /* Set SE_CONTROL */
- if (!s->scale_enable) {
- val = malidp_hw_read(hwdev, se_control);
- val &= ~MALIDP_SE_SCALING_EN;
- malidp_hw_write(hwdev, val, se_control);
- return;
- }
- hwdev->hw->se_set_scaling_coeffs(hwdev, s, old_s);
- val = malidp_hw_read(hwdev, se_control);
- val |= MALIDP_SE_SCALING_EN | MALIDP_SE_ALPHA_EN;
- val &= ~MALIDP_SE_ENH(MALIDP_SE_ENH_MASK);
- val |= s->enhancer_enable ? MALIDP_SE_ENH(3) : 0;
- val |= MALIDP_SE_RGBO_IF_EN;
- malidp_hw_write(hwdev, val, se_control);
- /* Set IN_SIZE & OUT_SIZE. */
- val = MALIDP_SE_SET_V_SIZE(s->input_h) |
- MALIDP_SE_SET_H_SIZE(s->input_w);
- malidp_hw_write(hwdev, val, layer_control + MALIDP_SE_L0_IN_SIZE);
- val = MALIDP_SE_SET_V_SIZE(s->output_h) |
- MALIDP_SE_SET_H_SIZE(s->output_w);
- malidp_hw_write(hwdev, val, layer_control + MALIDP_SE_L0_OUT_SIZE);
- /* Set phase regs. */
- malidp_hw_write(hwdev, s->h_init_phase, scr + MALIDP_SE_H_INIT_PH);
- malidp_hw_write(hwdev, s->h_delta_phase, scr + MALIDP_SE_H_DELTA_PH);
- malidp_hw_write(hwdev, s->v_init_phase, scr + MALIDP_SE_V_INIT_PH);
- malidp_hw_write(hwdev, s->v_delta_phase, scr + MALIDP_SE_V_DELTA_PH);
- }
- /*
- * set the "config valid" bit and wait until the hardware acts on it
- */
- static int malidp_set_and_wait_config_valid(struct drm_device *drm)
- {
- struct malidp_drm *malidp = drm->dev_private;
- struct malidp_hw_device *hwdev = malidp->dev;
- int ret;
- hwdev->hw->set_config_valid(hwdev, 1);
- /* don't wait for config_valid flag if we are in config mode */
- if (hwdev->hw->in_config_mode(hwdev)) {
- atomic_set(&malidp->config_valid, MALIDP_CONFIG_VALID_DONE);
- return 0;
- }
- ret = wait_event_interruptible_timeout(malidp->wq,
- atomic_read(&malidp->config_valid) == MALIDP_CONFIG_VALID_DONE,
- msecs_to_jiffies(MALIDP_CONF_VALID_TIMEOUT));
- return (ret > 0) ? 0 : -ETIMEDOUT;
- }
- static void malidp_atomic_commit_hw_done(struct drm_atomic_state *state)
- {
- struct drm_device *drm = state->dev;
- struct malidp_drm *malidp = drm->dev_private;
- int loop = 5;
- malidp->event = malidp->crtc.state->event;
- malidp->crtc.state->event = NULL;
- if (malidp->crtc.state->active) {
- /*
- * if we have an event to deliver to userspace, make sure
- * the vblank is enabled as we are sending it from the IRQ
- * handler.
- */
- if (malidp->event)
- drm_crtc_vblank_get(&malidp->crtc);
- /* only set config_valid if the CRTC is enabled */
- if (malidp_set_and_wait_config_valid(drm) < 0) {
- /*
- * make a loop around the second CVAL setting and
- * try 5 times before giving up.
- */
- while (loop--) {
- if (!malidp_set_and_wait_config_valid(drm))
- break;
- }
- DRM_DEBUG_DRIVER("timed out waiting for updated configuration\n");
- }
- } else if (malidp->event) {
- /* CRTC inactive means vblank IRQ is disabled, send event directly */
- spin_lock_irq(&drm->event_lock);
- drm_crtc_send_vblank_event(&malidp->crtc, malidp->event);
- malidp->event = NULL;
- spin_unlock_irq(&drm->event_lock);
- }
- drm_atomic_helper_commit_hw_done(state);
- }
- static void malidp_atomic_commit_tail(struct drm_atomic_state *state)
- {
- struct drm_device *drm = state->dev;
- struct malidp_drm *malidp = drm->dev_private;
- struct drm_crtc *crtc;
- struct drm_crtc_state *old_crtc_state;
- int i;
- pm_runtime_get_sync(drm->dev);
- /*
- * set config_valid to a special value to let IRQ handlers
- * know that we are updating registers
- */
- atomic_set(&malidp->config_valid, MALIDP_CONFIG_START);
- malidp->dev->hw->set_config_valid(malidp->dev, 0);
- drm_atomic_helper_commit_modeset_disables(drm, state);
- for_each_old_crtc_in_state(state, crtc, old_crtc_state, i) {
- malidp_atomic_commit_update_gamma(crtc, old_crtc_state);
- malidp_atomic_commit_update_coloradj(crtc, old_crtc_state);
- malidp_atomic_commit_se_config(crtc, old_crtc_state);
- }
- drm_atomic_helper_commit_planes(drm, state, DRM_PLANE_COMMIT_ACTIVE_ONLY);
- malidp_mw_atomic_commit(drm, state);
- drm_atomic_helper_commit_modeset_enables(drm, state);
- malidp_atomic_commit_hw_done(state);
- pm_runtime_put(drm->dev);
- drm_atomic_helper_cleanup_planes(drm, state);
- }
- static const struct drm_mode_config_helper_funcs malidp_mode_config_helpers = {
- .atomic_commit_tail = malidp_atomic_commit_tail,
- };
- static bool
- malidp_verify_afbc_framebuffer_caps(struct drm_device *dev,
- const struct drm_mode_fb_cmd2 *mode_cmd)
- {
- if (malidp_format_mod_supported(dev, mode_cmd->pixel_format,
- mode_cmd->modifier[0]) == false)
- return false;
- if (mode_cmd->offsets[0] != 0) {
- DRM_DEBUG_KMS("AFBC buffers' plane offset should be 0\n");
- return false;
- }
- switch (mode_cmd->modifier[0] & AFBC_SIZE_MASK) {
- case AFBC_SIZE_16X16:
- if ((mode_cmd->width % 16) || (mode_cmd->height % 16)) {
- DRM_DEBUG_KMS("AFBC buffers must be aligned to 16 pixels\n");
- return false;
- }
- break;
- default:
- DRM_DEBUG_KMS("Unsupported AFBC block size\n");
- return false;
- }
- return true;
- }
- static bool
- malidp_verify_afbc_framebuffer_size(struct drm_device *dev,
- struct drm_file *file,
- const struct drm_mode_fb_cmd2 *mode_cmd)
- {
- int n_superblocks = 0;
- const struct drm_format_info *info;
- struct drm_gem_object *objs = NULL;
- u32 afbc_superblock_size = 0, afbc_superblock_height = 0;
- u32 afbc_superblock_width = 0, afbc_size = 0;
- int bpp = 0;
- switch (mode_cmd->modifier[0] & AFBC_SIZE_MASK) {
- case AFBC_SIZE_16X16:
- afbc_superblock_height = 16;
- afbc_superblock_width = 16;
- break;
- default:
- DRM_DEBUG_KMS("AFBC superblock size is not supported\n");
- return false;
- }
- info = drm_get_format_info(dev, mode_cmd);
- n_superblocks = (mode_cmd->width / afbc_superblock_width) *
- (mode_cmd->height / afbc_superblock_height);
- bpp = malidp_format_get_bpp(info->format);
- afbc_superblock_size = (bpp * afbc_superblock_width * afbc_superblock_height)
- / BITS_PER_BYTE;
- afbc_size = ALIGN(n_superblocks * AFBC_HEADER_SIZE, AFBC_SUPERBLK_ALIGNMENT);
- afbc_size += n_superblocks * ALIGN(afbc_superblock_size, AFBC_SUPERBLK_ALIGNMENT);
- if ((mode_cmd->width * bpp) != (mode_cmd->pitches[0] * BITS_PER_BYTE)) {
- DRM_DEBUG_KMS("Invalid value of (pitch * BITS_PER_BYTE) (=%u) "
- "should be same as width (=%u) * bpp (=%u)\n",
- (mode_cmd->pitches[0] * BITS_PER_BYTE),
- mode_cmd->width, bpp);
- return false;
- }
- objs = drm_gem_object_lookup(file, mode_cmd->handles[0]);
- if (!objs) {
- DRM_DEBUG_KMS("Failed to lookup GEM object\n");
- return false;
- }
- if (objs->size < afbc_size) {
- DRM_DEBUG_KMS("buffer size (%zu) too small for AFBC buffer size = %u\n",
- objs->size, afbc_size);
- drm_gem_object_put(objs);
- return false;
- }
- drm_gem_object_put(objs);
- return true;
- }
- static bool
- malidp_verify_afbc_framebuffer(struct drm_device *dev, struct drm_file *file,
- const struct drm_mode_fb_cmd2 *mode_cmd)
- {
- if (malidp_verify_afbc_framebuffer_caps(dev, mode_cmd))
- return malidp_verify_afbc_framebuffer_size(dev, file, mode_cmd);
- return false;
- }
- static struct drm_framebuffer *
- malidp_fb_create(struct drm_device *dev, struct drm_file *file,
- const struct drm_mode_fb_cmd2 *mode_cmd)
- {
- if (mode_cmd->modifier[0]) {
- if (!malidp_verify_afbc_framebuffer(dev, file, mode_cmd))
- return ERR_PTR(-EINVAL);
- }
- return drm_gem_fb_create(dev, file, mode_cmd);
- }
- static const struct drm_mode_config_funcs malidp_mode_config_funcs = {
- .fb_create = malidp_fb_create,
- .atomic_check = drm_atomic_helper_check,
- .atomic_commit = drm_atomic_helper_commit,
- };
- static int malidp_init(struct drm_device *drm)
- {
- int ret;
- struct malidp_drm *malidp = drm->dev_private;
- struct malidp_hw_device *hwdev = malidp->dev;
- drm_mode_config_init(drm);
- drm->mode_config.min_width = hwdev->min_line_size;
- drm->mode_config.min_height = hwdev->min_line_size;
- drm->mode_config.max_width = hwdev->max_line_size;
- drm->mode_config.max_height = hwdev->max_line_size;
- drm->mode_config.funcs = &malidp_mode_config_funcs;
- drm->mode_config.helper_private = &malidp_mode_config_helpers;
- drm->mode_config.allow_fb_modifiers = true;
- ret = malidp_crtc_init(drm);
- if (ret)
- goto crtc_fail;
- ret = malidp_mw_connector_init(drm);
- if (ret)
- goto crtc_fail;
- return 0;
- crtc_fail:
- drm_mode_config_cleanup(drm);
- return ret;
- }
- static void malidp_fini(struct drm_device *drm)
- {
- drm_mode_config_cleanup(drm);
- }
- static int malidp_irq_init(struct platform_device *pdev)
- {
- int irq_de, irq_se, ret = 0;
- struct drm_device *drm = dev_get_drvdata(&pdev->dev);
- struct malidp_drm *malidp = drm->dev_private;
- struct malidp_hw_device *hwdev = malidp->dev;
- /* fetch the interrupts from DT */
- irq_de = platform_get_irq_byname(pdev, "DE");
- if (irq_de < 0) {
- DRM_ERROR("no 'DE' IRQ specified!\n");
- return irq_de;
- }
- irq_se = platform_get_irq_byname(pdev, "SE");
- if (irq_se < 0) {
- DRM_ERROR("no 'SE' IRQ specified!\n");
- return irq_se;
- }
- ret = malidp_de_irq_init(drm, irq_de);
- if (ret)
- return ret;
- ret = malidp_se_irq_init(drm, irq_se);
- if (ret) {
- malidp_de_irq_fini(hwdev);
- return ret;
- }
- return 0;
- }
- DEFINE_DRM_GEM_CMA_FOPS(fops);
- static int malidp_dumb_create(struct drm_file *file_priv,
- struct drm_device *drm,
- struct drm_mode_create_dumb *args)
- {
- struct malidp_drm *malidp = drm->dev_private;
- /* allocate for the worst case scenario, i.e. rotated buffers */
- u8 alignment = malidp_hw_get_pitch_align(malidp->dev, 1);
- args->pitch = ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8), alignment);
- return drm_gem_cma_dumb_create_internal(file_priv, drm, args);
- }
- #ifdef CONFIG_DEBUG_FS
- static void malidp_error_stats_init(struct malidp_error_stats *error_stats)
- {
- error_stats->num_errors = 0;
- error_stats->last_error_status = 0;
- error_stats->last_error_vblank = -1;
- }
- void malidp_error(struct malidp_drm *malidp,
- struct malidp_error_stats *error_stats, u32 status,
- u64 vblank)
- {
- unsigned long irqflags;
- spin_lock_irqsave(&malidp->errors_lock, irqflags);
- error_stats->last_error_status = status;
- error_stats->last_error_vblank = vblank;
- error_stats->num_errors++;
- spin_unlock_irqrestore(&malidp->errors_lock, irqflags);
- }
- static void malidp_error_stats_dump(const char *prefix,
- struct malidp_error_stats error_stats,
- struct seq_file *m)
- {
- seq_printf(m, "[%s] num_errors : %d\n", prefix,
- error_stats.num_errors);
- seq_printf(m, "[%s] last_error_status : 0x%08x\n", prefix,
- error_stats.last_error_status);
- seq_printf(m, "[%s] last_error_vblank : %lld\n", prefix,
- error_stats.last_error_vblank);
- }
- static int malidp_show_stats(struct seq_file *m, void *arg)
- {
- struct drm_device *drm = m->private;
- struct malidp_drm *malidp = drm->dev_private;
- unsigned long irqflags;
- struct malidp_error_stats de_errors, se_errors;
- spin_lock_irqsave(&malidp->errors_lock, irqflags);
- de_errors = malidp->de_errors;
- se_errors = malidp->se_errors;
- spin_unlock_irqrestore(&malidp->errors_lock, irqflags);
- malidp_error_stats_dump("DE", de_errors, m);
- malidp_error_stats_dump("SE", se_errors, m);
- return 0;
- }
- static int malidp_debugfs_open(struct inode *inode, struct file *file)
- {
- return single_open(file, malidp_show_stats, inode->i_private);
- }
- static ssize_t malidp_debugfs_write(struct file *file, const char __user *ubuf,
- size_t len, loff_t *offp)
- {
- struct seq_file *m = file->private_data;
- struct drm_device *drm = m->private;
- struct malidp_drm *malidp = drm->dev_private;
- unsigned long irqflags;
- spin_lock_irqsave(&malidp->errors_lock, irqflags);
- malidp_error_stats_init(&malidp->de_errors);
- malidp_error_stats_init(&malidp->se_errors);
- spin_unlock_irqrestore(&malidp->errors_lock, irqflags);
- return len;
- }
- static const struct file_operations malidp_debugfs_fops = {
- .owner = THIS_MODULE,
- .open = malidp_debugfs_open,
- .read = seq_read,
- .write = malidp_debugfs_write,
- .llseek = seq_lseek,
- .release = single_release,
- };
- static void malidp_debugfs_init(struct drm_minor *minor)
- {
- struct malidp_drm *malidp = minor->dev->dev_private;
- malidp_error_stats_init(&malidp->de_errors);
- malidp_error_stats_init(&malidp->se_errors);
- spin_lock_init(&malidp->errors_lock);
- debugfs_create_file("debug", S_IRUGO | S_IWUSR, minor->debugfs_root,
- minor->dev, &malidp_debugfs_fops);
- }
- #endif //CONFIG_DEBUG_FS
- static struct drm_driver malidp_driver = {
- .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
- DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE(malidp_dumb_create),
- #ifdef CONFIG_DEBUG_FS
- .debugfs_init = malidp_debugfs_init,
- #endif
- .fops = &fops,
- .name = "mali-dp",
- .desc = "ARM Mali Display Processor driver",
- .date = "20160106",
- .major = 1,
- .minor = 0,
- };
- static const struct of_device_id malidp_drm_of_match[] = {
- {
- .compatible = "arm,mali-dp500",
- .data = &malidp_device[MALIDP_500]
- },
- {
- .compatible = "arm,mali-dp550",
- .data = &malidp_device[MALIDP_550]
- },
- {
- .compatible = "arm,mali-dp650",
- .data = &malidp_device[MALIDP_650]
- },
- {},
- };
- MODULE_DEVICE_TABLE(of, malidp_drm_of_match);
- static bool malidp_is_compatible_hw_id(struct malidp_hw_device *hwdev,
- const struct of_device_id *dev_id)
- {
- u32 core_id;
- const char *compatstr_dp500 = "arm,mali-dp500";
- bool is_dp500;
- bool dt_is_dp500;
- /*
- * The DP500 CORE_ID register is in a different location, so check it
- * first. If the product id field matches, then this is DP500, otherwise
- * check the DP550/650 CORE_ID register.
- */
- core_id = malidp_hw_read(hwdev, MALIDP500_DC_BASE + MALIDP_DE_CORE_ID);
- /* Offset 0x18 will never read 0x500 on products other than DP500. */
- is_dp500 = (MALIDP_PRODUCT_ID(core_id) == 0x500);
- dt_is_dp500 = strnstr(dev_id->compatible, compatstr_dp500,
- sizeof(dev_id->compatible)) != NULL;
- if (is_dp500 != dt_is_dp500) {
- DRM_ERROR("Device-tree expects %s, but hardware %s DP500.\n",
- dev_id->compatible, is_dp500 ? "is" : "is not");
- return false;
- } else if (!dt_is_dp500) {
- u16 product_id;
- char buf[32];
- core_id = malidp_hw_read(hwdev,
- MALIDP550_DC_BASE + MALIDP_DE_CORE_ID);
- product_id = MALIDP_PRODUCT_ID(core_id);
- snprintf(buf, sizeof(buf), "arm,mali-dp%X", product_id);
- if (!strnstr(dev_id->compatible, buf,
- sizeof(dev_id->compatible))) {
- DRM_ERROR("Device-tree expects %s, but hardware is DP%03X.\n",
- dev_id->compatible, product_id);
- return false;
- }
- }
- return true;
- }
- static bool malidp_has_sufficient_address_space(const struct resource *res,
- const struct of_device_id *dev_id)
- {
- resource_size_t res_size = resource_size(res);
- const char *compatstr_dp500 = "arm,mali-dp500";
- if (!strnstr(dev_id->compatible, compatstr_dp500,
- sizeof(dev_id->compatible)))
- return res_size >= MALIDP550_ADDR_SPACE_SIZE;
- else if (res_size < MALIDP500_ADDR_SPACE_SIZE)
- return false;
- return true;
- }
- static ssize_t core_id_show(struct device *dev, struct device_attribute *attr,
- char *buf)
- {
- struct drm_device *drm = dev_get_drvdata(dev);
- struct malidp_drm *malidp = drm->dev_private;
- return snprintf(buf, PAGE_SIZE, "%08x\n", malidp->core_id);
- }
- static DEVICE_ATTR_RO(core_id);
- static struct attribute *mali_dp_attrs[] = {
- &dev_attr_core_id.attr,
- NULL,
- };
- ATTRIBUTE_GROUPS(mali_dp);
- #define MAX_OUTPUT_CHANNELS 3
- static int malidp_runtime_pm_suspend(struct device *dev)
- {
- struct drm_device *drm = dev_get_drvdata(dev);
- struct malidp_drm *malidp = drm->dev_private;
- struct malidp_hw_device *hwdev = malidp->dev;
- /* we can only suspend if the hardware is in config mode */
- WARN_ON(!hwdev->hw->in_config_mode(hwdev));
- malidp_se_irq_fini(hwdev);
- malidp_de_irq_fini(hwdev);
- hwdev->pm_suspended = true;
- clk_disable_unprepare(hwdev->mclk);
- clk_disable_unprepare(hwdev->aclk);
- clk_disable_unprepare(hwdev->pclk);
- return 0;
- }
- static int malidp_runtime_pm_resume(struct device *dev)
- {
- struct drm_device *drm = dev_get_drvdata(dev);
- struct malidp_drm *malidp = drm->dev_private;
- struct malidp_hw_device *hwdev = malidp->dev;
- clk_prepare_enable(hwdev->pclk);
- clk_prepare_enable(hwdev->aclk);
- clk_prepare_enable(hwdev->mclk);
- hwdev->pm_suspended = false;
- malidp_de_irq_hw_init(hwdev);
- malidp_se_irq_hw_init(hwdev);
- return 0;
- }
- static int malidp_bind(struct device *dev)
- {
- struct resource *res;
- struct drm_device *drm;
- struct malidp_drm *malidp;
- struct malidp_hw_device *hwdev;
- struct platform_device *pdev = to_platform_device(dev);
- struct of_device_id const *dev_id;
- struct drm_encoder *encoder;
- /* number of lines for the R, G and B output */
- u8 output_width[MAX_OUTPUT_CHANNELS];
- int ret = 0, i;
- u32 version, out_depth = 0;
- malidp = devm_kzalloc(dev, sizeof(*malidp), GFP_KERNEL);
- if (!malidp)
- return -ENOMEM;
- hwdev = devm_kzalloc(dev, sizeof(*hwdev), GFP_KERNEL);
- if (!hwdev)
- return -ENOMEM;
- hwdev->hw = (struct malidp_hw *)of_device_get_match_data(dev);
- malidp->dev = hwdev;
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- hwdev->regs = devm_ioremap_resource(dev, res);
- if (IS_ERR(hwdev->regs))
- return PTR_ERR(hwdev->regs);
- hwdev->pclk = devm_clk_get(dev, "pclk");
- if (IS_ERR(hwdev->pclk))
- return PTR_ERR(hwdev->pclk);
- hwdev->aclk = devm_clk_get(dev, "aclk");
- if (IS_ERR(hwdev->aclk))
- return PTR_ERR(hwdev->aclk);
- hwdev->mclk = devm_clk_get(dev, "mclk");
- if (IS_ERR(hwdev->mclk))
- return PTR_ERR(hwdev->mclk);
- hwdev->pxlclk = devm_clk_get(dev, "pxlclk");
- if (IS_ERR(hwdev->pxlclk))
- return PTR_ERR(hwdev->pxlclk);
- /* Get the optional framebuffer memory resource */
- ret = of_reserved_mem_device_init(dev);
- if (ret && ret != -ENODEV)
- return ret;
- drm = drm_dev_alloc(&malidp_driver, dev);
- if (IS_ERR(drm)) {
- ret = PTR_ERR(drm);
- goto alloc_fail;
- }
- drm->dev_private = malidp;
- dev_set_drvdata(dev, drm);
- /* Enable power management */
- pm_runtime_enable(dev);
- /* Resume device to enable the clocks */
- if (pm_runtime_enabled(dev))
- pm_runtime_get_sync(dev);
- else
- malidp_runtime_pm_resume(dev);
- dev_id = of_match_device(malidp_drm_of_match, dev);
- if (!dev_id) {
- ret = -EINVAL;
- goto query_hw_fail;
- }
- if (!malidp_has_sufficient_address_space(res, dev_id)) {
- DRM_ERROR("Insufficient address space in device-tree.\n");
- ret = -EINVAL;
- goto query_hw_fail;
- }
- if (!malidp_is_compatible_hw_id(hwdev, dev_id)) {
- ret = -EINVAL;
- goto query_hw_fail;
- }
- ret = hwdev->hw->query_hw(hwdev);
- if (ret) {
- DRM_ERROR("Invalid HW configuration\n");
- goto query_hw_fail;
- }
- version = malidp_hw_read(hwdev, hwdev->hw->map.dc_base + MALIDP_DE_CORE_ID);
- DRM_INFO("found ARM Mali-DP%3x version r%dp%d\n", version >> 16,
- (version >> 12) & 0xf, (version >> 8) & 0xf);
- malidp->core_id = version;
- ret = of_property_read_u32(dev->of_node,
- "arm,malidp-arqos-value",
- &hwdev->arqos_value);
- if (ret)
- hwdev->arqos_value = 0x0;
- /* set the number of lines used for output of RGB data */
- ret = of_property_read_u8_array(dev->of_node,
- "arm,malidp-output-port-lines",
- output_width, MAX_OUTPUT_CHANNELS);
- if (ret)
- goto query_hw_fail;
- for (i = 0; i < MAX_OUTPUT_CHANNELS; i++)
- out_depth = (out_depth << 8) | (output_width[i] & 0xf);
- malidp_hw_write(hwdev, out_depth, hwdev->hw->map.out_depth_base);
- hwdev->output_color_depth = out_depth;
- atomic_set(&malidp->config_valid, MALIDP_CONFIG_VALID_INIT);
- init_waitqueue_head(&malidp->wq);
- ret = malidp_init(drm);
- if (ret < 0)
- goto query_hw_fail;
- /* Set the CRTC's port so that the encoder component can find it */
- malidp->crtc.port = of_graph_get_port_by_id(dev->of_node, 0);
- ret = component_bind_all(dev, drm);
- if (ret) {
- DRM_ERROR("Failed to bind all components\n");
- goto bind_fail;
- }
- /* We expect to have a maximum of two encoders one for the actual
- * display and a virtual one for the writeback connector
- */
- WARN_ON(drm->mode_config.num_encoder > 2);
- list_for_each_entry(encoder, &drm->mode_config.encoder_list, head) {
- encoder->possible_clones =
- (1 << drm->mode_config.num_encoder) - 1;
- }
- ret = malidp_irq_init(pdev);
- if (ret < 0)
- goto irq_init_fail;
- drm->irq_enabled = true;
- ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
- if (ret < 0) {
- DRM_ERROR("failed to initialise vblank\n");
- goto vblank_fail;
- }
- pm_runtime_put(dev);
- drm_mode_config_reset(drm);
- drm_kms_helper_poll_init(drm);
- ret = drm_dev_register(drm, 0);
- if (ret)
- goto register_fail;
- drm_fbdev_generic_setup(drm, 32);
- return 0;
- register_fail:
- drm_kms_helper_poll_fini(drm);
- pm_runtime_get_sync(dev);
- vblank_fail:
- malidp_se_irq_fini(hwdev);
- malidp_de_irq_fini(hwdev);
- drm->irq_enabled = false;
- irq_init_fail:
- drm_atomic_helper_shutdown(drm);
- component_unbind_all(dev, drm);
- bind_fail:
- of_node_put(malidp->crtc.port);
- malidp->crtc.port = NULL;
- malidp_fini(drm);
- query_hw_fail:
- pm_runtime_put(dev);
- if (pm_runtime_enabled(dev))
- pm_runtime_disable(dev);
- else
- malidp_runtime_pm_suspend(dev);
- drm->dev_private = NULL;
- dev_set_drvdata(dev, NULL);
- drm_dev_put(drm);
- alloc_fail:
- of_reserved_mem_device_release(dev);
- return ret;
- }
- static void malidp_unbind(struct device *dev)
- {
- struct drm_device *drm = dev_get_drvdata(dev);
- struct malidp_drm *malidp = drm->dev_private;
- struct malidp_hw_device *hwdev = malidp->dev;
- drm_dev_unregister(drm);
- drm_kms_helper_poll_fini(drm);
- pm_runtime_get_sync(dev);
- drm_atomic_helper_shutdown(drm);
- malidp_se_irq_fini(hwdev);
- malidp_de_irq_fini(hwdev);
- drm->irq_enabled = false;
- component_unbind_all(dev, drm);
- of_node_put(malidp->crtc.port);
- malidp->crtc.port = NULL;
- malidp_fini(drm);
- pm_runtime_put(dev);
- if (pm_runtime_enabled(dev))
- pm_runtime_disable(dev);
- else
- malidp_runtime_pm_suspend(dev);
- drm->dev_private = NULL;
- dev_set_drvdata(dev, NULL);
- drm_dev_put(drm);
- of_reserved_mem_device_release(dev);
- }
- static const struct component_master_ops malidp_master_ops = {
- .bind = malidp_bind,
- .unbind = malidp_unbind,
- };
- static int malidp_compare_dev(struct device *dev, void *data)
- {
- struct device_node *np = data;
- return dev->of_node == np;
- }
- static int malidp_platform_probe(struct platform_device *pdev)
- {
- struct device_node *port;
- struct component_match *match = NULL;
- if (!pdev->dev.of_node)
- return -ENODEV;
- /* there is only one output port inside each device, find it */
- port = of_graph_get_remote_node(pdev->dev.of_node, 0, 0);
- if (!port)
- return -ENODEV;
- drm_of_component_match_add(&pdev->dev, &match, malidp_compare_dev,
- port);
- of_node_put(port);
- return component_master_add_with_match(&pdev->dev, &malidp_master_ops,
- match);
- }
- static int malidp_platform_remove(struct platform_device *pdev)
- {
- component_master_del(&pdev->dev, &malidp_master_ops);
- return 0;
- }
- static int __maybe_unused malidp_pm_suspend(struct device *dev)
- {
- struct drm_device *drm = dev_get_drvdata(dev);
- return drm_mode_config_helper_suspend(drm);
- }
- static int __maybe_unused malidp_pm_resume(struct device *dev)
- {
- struct drm_device *drm = dev_get_drvdata(dev);
- drm_mode_config_helper_resume(drm);
- return 0;
- }
- static int __maybe_unused malidp_pm_suspend_late(struct device *dev)
- {
- if (!pm_runtime_status_suspended(dev)) {
- malidp_runtime_pm_suspend(dev);
- pm_runtime_set_suspended(dev);
- }
- return 0;
- }
- static int __maybe_unused malidp_pm_resume_early(struct device *dev)
- {
- malidp_runtime_pm_resume(dev);
- pm_runtime_set_active(dev);
- return 0;
- }
- static const struct dev_pm_ops malidp_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(malidp_pm_suspend, malidp_pm_resume) \
- SET_LATE_SYSTEM_SLEEP_PM_OPS(malidp_pm_suspend_late, malidp_pm_resume_early) \
- SET_RUNTIME_PM_OPS(malidp_runtime_pm_suspend, malidp_runtime_pm_resume, NULL)
- };
- static struct platform_driver malidp_platform_driver = {
- .probe = malidp_platform_probe,
- .remove = malidp_platform_remove,
- .driver = {
- .name = "mali-dp",
- .pm = &malidp_pm_ops,
- .of_match_table = malidp_drm_of_match,
- .dev_groups = mali_dp_groups,
- },
- };
- module_platform_driver(malidp_platform_driver);
- MODULE_AUTHOR("Liviu Dudau <Liviu.Dudau@arm.com>");
- MODULE_DESCRIPTION("ARM Mali DP DRM driver");
- MODULE_LICENSE("GPL v2");
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