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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_fbdev_generic.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_gem_dma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_managed.h>
#include <drm/drm_modeset_helper.h>
#include <drm/drm_module.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;
bool fence_cookie = dma_fence_begin_signalling();
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);
dma_fence_end_signalling(fence_cookie);
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;
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_DMA_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_dma_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 const struct drm_driver malidp_driver = {
.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
DRM_GEM_DMA_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_drm_dev_alloc(dev, &malidp_driver, typeof(*malidp), base);
if (IS_ERR(malidp))
return PTR_ERR(malidp);
drm = &malidp->base;
hwdev = drmm_kzalloc(drm, 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->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;
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);
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);
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);
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);
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,
},
};
drm_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");
|