drm: sti: Add DRM driver itself

Make the link between all the hardware drivers and DRM/KMS interface.
Create the driver itself and make it register all the sub-components.
Use GEM CMA helpers for buffer allocation.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Reviewed-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Benjamin Gaignard 2014-07-31 09:39:11 +02:00
Родитель d219673d84
Коммит 9bbf86fe87
9 изменённых файлов: 985 добавлений и 3 удалений

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@ -1,6 +1,14 @@
config DRM_STI config DRM_STI
tristate "DRM Support for STMicroelectronics SoC stiH41x Series" tristate "DRM Support for STMicroelectronics SoC stiH41x Series"
depends on DRM && (SOC_STIH415 || SOC_STIH416 || ARCH_MULTIPLATFORM) depends on DRM && (SOC_STIH415 || SOC_STIH416 || ARCH_MULTIPLATFORM)
select DRM_KMS_HELPER
select DRM_GEM_CMA_HELPER
select DRM_KMS_CMA_HELPER select DRM_KMS_CMA_HELPER
help help
Choose this option to enable DRM on STM stiH41x chipset Choose this option to enable DRM on STM stiH41x chipset
config DRM_STI_FBDEV
bool "DRM frame buffer device for STMicroelectronics SoC stiH41x Serie"
depends on DRM_STI
help
Choose this option to enable FBDEV on top of DRM for STM stiH41x chipset

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@ -3,7 +3,9 @@ sticompositor-y := \
sti_mixer.o \ sti_mixer.o \
sti_gdp.o \ sti_gdp.o \
sti_vid.o \ sti_vid.o \
sti_compositor.o sti_compositor.o \
sti_drm_crtc.o \
sti_drm_plane.o
stihdmi-y := sti_hdmi.o \ stihdmi-y := sti_hdmi.o \
sti_hdmi_tx3g0c55phy.o \ sti_hdmi_tx3g0c55phy.o \
@ -15,4 +17,5 @@ obj-$(CONFIG_DRM_STI) = \
stihdmi.o \ stihdmi.o \
sti_hda.o \ sti_hda.o \
sti_tvout.o \ sti_tvout.o \
sticompositor.o sticompositor.o \
sti_drm_drv.o

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@ -14,6 +14,9 @@
#include <drm/drmP.h> #include <drm/drmP.h>
#include "sti_compositor.h" #include "sti_compositor.h"
#include "sti_drm_crtc.h"
#include "sti_drm_drv.h"
#include "sti_drm_plane.h"
#include "sti_gdp.h" #include "sti_gdp.h"
#include "sti_vtg.h" #include "sti_vtg.h"
@ -87,12 +90,51 @@ static int sti_compositor_bind(struct device *dev, struct device *master,
struct sti_compositor *compo = dev_get_drvdata(dev); struct sti_compositor *compo = dev_get_drvdata(dev);
struct drm_device *drm_dev = data; struct drm_device *drm_dev = data;
unsigned int i, crtc = 0, plane = 0; unsigned int i, crtc = 0, plane = 0;
struct sti_drm_private *dev_priv = drm_dev->dev_private;
struct drm_plane *cursor = NULL;
struct drm_plane *primary = NULL;
dev_priv->compo = compo;
for (i = 0; i < compo->nb_layers; i++) {
if (compo->layer[i]) {
enum sti_layer_desc desc = compo->layer[i]->desc;
enum sti_layer_type type = desc & STI_LAYER_TYPE_MASK;
enum drm_plane_type plane_type = DRM_PLANE_TYPE_OVERLAY;
if (compo->mixer[crtc])
plane_type = DRM_PLANE_TYPE_PRIMARY;
switch (type) {
case STI_CUR:
cursor = sti_drm_plane_init(drm_dev,
compo->layer[i],
(1 << crtc) - 1,
DRM_PLANE_TYPE_CURSOR);
break;
case STI_GDP:
case STI_VID:
primary = sti_drm_plane_init(drm_dev,
compo->layer[i],
(1 << crtc) - 1, plane_type);
plane++;
break;
}
/* The first planes are reserved for primary planes*/
if (compo->mixer[crtc]) {
sti_drm_crtc_init(drm_dev, compo->mixer[crtc],
primary, cursor);
crtc++;
cursor = NULL;
}
}
}
drm_vblank_init(drm_dev, crtc); drm_vblank_init(drm_dev, crtc);
/* Allow usage of vblank without having to call drm_irq_install */ /* Allow usage of vblank without having to call drm_irq_install */
drm_dev->irq_enabled = 1; drm_dev->irq_enabled = 1;
DRM_DEBUG_DRIVER("Initialized %d DRM CRTC(s) and %d DRM plane(s)\n", DRM_DEBUG_DRIVER("Initialized %d DRM CRTC(s) and %d DRM plane(s)\n",
crtc, plane); crtc, plane);
DRM_DEBUG_DRIVER("DRM plane(s) for VID/VDP not created yet\n"); DRM_DEBUG_DRIVER("DRM plane(s) for VID/VDP not created yet\n");
@ -139,6 +181,7 @@ static int sti_compositor_probe(struct platform_device *pdev)
return -ENOMEM; return -ENOMEM;
} }
compo->dev = dev; compo->dev = dev;
compo->vtg_vblank_nb.notifier_call = sti_drm_crtc_vblank_cb;
/* populate data structure depending on compatibility */ /* populate data structure depending on compatibility */
BUG_ON(!of_match_node(compositor_of_match, np)->data); BUG_ON(!of_match_node(compositor_of_match, np)->data);

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@ -0,0 +1,423 @@
/*
* Copyright (C) STMicroelectronics SA 2014
* Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
* Fabien Dessenne <fabien.dessenne@st.com>
* for STMicroelectronics.
* License terms: GNU General Public License (GPL), version 2
*/
#include <linux/clk.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include "sti_compositor.h"
#include "sti_drm_drv.h"
#include "sti_drm_crtc.h"
#include "sti_vtg.h"
static void sti_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
{
DRM_DEBUG_KMS("\n");
}
static void sti_drm_crtc_prepare(struct drm_crtc *crtc)
{
struct sti_mixer *mixer = to_sti_mixer(crtc);
struct device *dev = mixer->dev;
struct sti_compositor *compo = dev_get_drvdata(dev);
compo->enable = true;
/* Prepare and enable the compo IP clock */
if (mixer->id == STI_MIXER_MAIN) {
if (clk_prepare_enable(compo->clk_compo_main))
DRM_INFO("Failed to prepare/enable compo_main clk\n");
} else {
if (clk_prepare_enable(compo->clk_compo_aux))
DRM_INFO("Failed to prepare/enable compo_aux clk\n");
}
}
static void sti_drm_crtc_commit(struct drm_crtc *crtc)
{
struct sti_mixer *mixer = to_sti_mixer(crtc);
struct device *dev = mixer->dev;
struct sti_compositor *compo = dev_get_drvdata(dev);
struct sti_layer *layer;
if ((!mixer || !compo)) {
DRM_ERROR("Can not find mixer or compositor)\n");
return;
}
/* get GDP which is reserved to the CRTC FB */
layer = to_sti_layer(crtc->primary);
if (layer)
sti_layer_commit(layer);
else
DRM_ERROR("Can not find CRTC dedicated plane (GDP0)\n");
/* Enable layer on mixer */
if (sti_mixer_set_layer_status(mixer, layer, true))
DRM_ERROR("Can not enable layer at mixer\n");
}
static bool sti_drm_crtc_mode_fixup(struct drm_crtc *crtc,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
/* accept the provided drm_display_mode, do not fix it up */
return true;
}
static int
sti_drm_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode, int x, int y,
struct drm_framebuffer *old_fb)
{
struct sti_mixer *mixer = to_sti_mixer(crtc);
struct device *dev = mixer->dev;
struct sti_compositor *compo = dev_get_drvdata(dev);
struct sti_layer *layer;
struct clk *clk;
int rate = mode->clock * 1000;
int res;
unsigned int w, h;
DRM_DEBUG_KMS("CRTC:%d (%s) fb:%d mode:%d (%s)\n",
crtc->base.id, sti_mixer_to_str(mixer),
crtc->primary->fb->base.id, mode->base.id, mode->name);
DRM_DEBUG_KMS("%d %d %d %d %d %d %d %d %d %d 0x%x 0x%x\n",
mode->vrefresh, mode->clock,
mode->hdisplay,
mode->hsync_start, mode->hsync_end,
mode->htotal,
mode->vdisplay,
mode->vsync_start, mode->vsync_end,
mode->vtotal, mode->type, mode->flags);
/* Set rate and prepare/enable pixel clock */
if (mixer->id == STI_MIXER_MAIN)
clk = compo->clk_pix_main;
else
clk = compo->clk_pix_aux;
res = clk_set_rate(clk, rate);
if (res < 0) {
DRM_ERROR("Cannot set rate (%dHz) for pix clk\n", rate);
return -EINVAL;
}
if (clk_prepare_enable(clk)) {
DRM_ERROR("Failed to prepare/enable pix clk\n");
return -EINVAL;
}
sti_vtg_set_config(mixer->id == STI_MIXER_MAIN ?
compo->vtg_main : compo->vtg_aux, &crtc->mode);
/* a GDP is reserved to the CRTC FB */
layer = to_sti_layer(crtc->primary);
if (!layer) {
DRM_ERROR("Can not find GDP0)\n");
return -EINVAL;
}
/* copy the mode data adjusted by mode_fixup() into crtc->mode
* so that hardware can be set to proper mode
*/
memcpy(&crtc->mode, adjusted_mode, sizeof(*adjusted_mode));
res = sti_mixer_set_layer_depth(mixer, layer);
if (res) {
DRM_ERROR("Can not set layer depth\n");
return -EINVAL;
}
res = sti_mixer_active_video_area(mixer, &crtc->mode);
if (res) {
DRM_ERROR("Can not set active video area\n");
return -EINVAL;
}
w = crtc->primary->fb->width - x;
h = crtc->primary->fb->height - y;
return sti_layer_prepare(layer, crtc->primary->fb, &crtc->mode,
mixer->id, 0, 0, w, h, x, y, w, h);
}
static int sti_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
struct drm_framebuffer *old_fb)
{
struct sti_mixer *mixer = to_sti_mixer(crtc);
struct device *dev = mixer->dev;
struct sti_compositor *compo = dev_get_drvdata(dev);
struct sti_layer *layer;
unsigned int w, h;
int ret;
DRM_DEBUG_KMS("CRTC:%d (%s) fb:%d (%d,%d)\n",
crtc->base.id, sti_mixer_to_str(mixer),
crtc->primary->fb->base.id, x, y);
/* GDP is reserved to the CRTC FB */
layer = to_sti_layer(crtc->primary);
if (!layer) {
DRM_ERROR("Can not find GDP0)\n");
ret = -EINVAL;
goto out;
}
w = crtc->primary->fb->width - crtc->x;
h = crtc->primary->fb->height - crtc->y;
ret = sti_layer_prepare(layer, crtc->primary->fb, &crtc->mode,
mixer->id, 0, 0, w, h,
crtc->x, crtc->y, w, h);
if (ret) {
DRM_ERROR("Can not prepare layer\n");
goto out;
}
sti_drm_crtc_commit(crtc);
out:
return ret;
}
static void sti_drm_crtc_load_lut(struct drm_crtc *crtc)
{
/* do nothing */
}
static void sti_drm_crtc_disable(struct drm_crtc *crtc)
{
struct sti_mixer *mixer = to_sti_mixer(crtc);
struct device *dev = mixer->dev;
struct sti_compositor *compo = dev_get_drvdata(dev);
struct sti_layer *layer;
if (!compo->enable)
return;
DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer));
/* Disable Background */
sti_mixer_set_background_status(mixer, false);
/* Disable GDP */
layer = to_sti_layer(crtc->primary);
if (!layer) {
DRM_ERROR("Cannot find GDP0\n");
return;
}
/* Disable layer at mixer level */
if (sti_mixer_set_layer_status(mixer, layer, false))
DRM_ERROR("Can not disable %s layer at mixer\n",
sti_layer_to_str(layer));
/* Wait a while to be sure that a Vsync event is received */
msleep(WAIT_NEXT_VSYNC_MS);
/* Then disable layer itself */
sti_layer_disable(layer);
drm_vblank_off(crtc->dev, mixer->id);
/* Disable pixel clock and compo IP clocks */
if (mixer->id == STI_MIXER_MAIN) {
clk_disable_unprepare(compo->clk_pix_main);
clk_disable_unprepare(compo->clk_compo_main);
} else {
clk_disable_unprepare(compo->clk_pix_aux);
clk_disable_unprepare(compo->clk_compo_aux);
}
compo->enable = false;
}
static struct drm_crtc_helper_funcs sti_crtc_helper_funcs = {
.dpms = sti_drm_crtc_dpms,
.prepare = sti_drm_crtc_prepare,
.commit = sti_drm_crtc_commit,
.mode_fixup = sti_drm_crtc_mode_fixup,
.mode_set = sti_drm_crtc_mode_set,
.mode_set_base = sti_drm_crtc_mode_set_base,
.load_lut = sti_drm_crtc_load_lut,
.disable = sti_drm_crtc_disable,
};
static int sti_drm_crtc_page_flip(struct drm_crtc *crtc,
struct drm_framebuffer *fb,
struct drm_pending_vblank_event *event,
uint32_t page_flip_flags)
{
struct drm_device *drm_dev = crtc->dev;
struct drm_framebuffer *old_fb;
struct sti_mixer *mixer = to_sti_mixer(crtc);
unsigned long flags;
int ret;
DRM_DEBUG_KMS("fb %d --> fb %d\n",
crtc->primary->fb->base.id, fb->base.id);
mutex_lock(&drm_dev->struct_mutex);
old_fb = crtc->primary->fb;
crtc->primary->fb = fb;
ret = sti_drm_crtc_mode_set_base(crtc, crtc->x, crtc->y, old_fb);
if (ret) {
DRM_ERROR("failed\n");
crtc->primary->fb = old_fb;
goto out;
}
if (event) {
event->pipe = mixer->id;
ret = drm_vblank_get(drm_dev, event->pipe);
if (ret) {
DRM_ERROR("Cannot get vblank\n");
goto out;
}
spin_lock_irqsave(&drm_dev->event_lock, flags);
if (mixer->pending_event) {
drm_vblank_put(drm_dev, event->pipe);
ret = -EBUSY;
} else {
mixer->pending_event = event;
}
spin_unlock_irqrestore(&drm_dev->event_lock, flags);
}
out:
mutex_unlock(&drm_dev->struct_mutex);
return ret;
}
static void sti_drm_crtc_destroy(struct drm_crtc *crtc)
{
DRM_DEBUG_KMS("\n");
drm_crtc_cleanup(crtc);
}
static int sti_drm_crtc_set_property(struct drm_crtc *crtc,
struct drm_property *property,
uint64_t val)
{
DRM_DEBUG_KMS("\n");
return 0;
}
int sti_drm_crtc_vblank_cb(struct notifier_block *nb,
unsigned long event, void *data)
{
struct drm_device *drm_dev;
struct sti_compositor *compo =
container_of(nb, struct sti_compositor, vtg_vblank_nb);
int *crtc = data;
unsigned long flags;
struct sti_drm_private *priv;
drm_dev = compo->mixer[*crtc]->drm_crtc.dev;
priv = drm_dev->dev_private;
if ((event != VTG_TOP_FIELD_EVENT) &&
(event != VTG_BOTTOM_FIELD_EVENT)) {
DRM_ERROR("unknown event: %lu\n", event);
return -EINVAL;
}
drm_handle_vblank(drm_dev, *crtc);
spin_lock_irqsave(&drm_dev->event_lock, flags);
if (compo->mixer[*crtc]->pending_event) {
drm_send_vblank_event(drm_dev, -1,
compo->mixer[*crtc]->pending_event);
drm_vblank_put(drm_dev, *crtc);
compo->mixer[*crtc]->pending_event = NULL;
}
spin_unlock_irqrestore(&drm_dev->event_lock, flags);
return 0;
}
int sti_drm_crtc_enable_vblank(struct drm_device *dev, int crtc)
{
struct sti_drm_private *dev_priv = dev->dev_private;
struct sti_compositor *compo = dev_priv->compo;
struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;
if (sti_vtg_register_client(crtc == STI_MIXER_MAIN ?
compo->vtg_main : compo->vtg_aux,
vtg_vblank_nb, crtc)) {
DRM_ERROR("Cannot register VTG notifier\n");
return -EINVAL;
}
return 0;
}
EXPORT_SYMBOL(sti_drm_crtc_enable_vblank);
void sti_drm_crtc_disable_vblank(struct drm_device *dev, int crtc)
{
struct sti_drm_private *priv = dev->dev_private;
struct sti_compositor *compo = priv->compo;
struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;
unsigned long flags;
DRM_DEBUG_DRIVER("\n");
if (sti_vtg_unregister_client(crtc == STI_MIXER_MAIN ?
compo->vtg_main : compo->vtg_aux, vtg_vblank_nb))
DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n");
/* free the resources of the pending requests */
spin_lock_irqsave(&dev->event_lock, flags);
if (compo->mixer[crtc]->pending_event) {
drm_vblank_put(dev, crtc);
compo->mixer[crtc]->pending_event = NULL;
}
spin_unlock_irqrestore(&dev->event_lock, flags);
}
EXPORT_SYMBOL(sti_drm_crtc_disable_vblank);
static struct drm_crtc_funcs sti_crtc_funcs = {
.set_config = drm_crtc_helper_set_config,
.page_flip = sti_drm_crtc_page_flip,
.destroy = sti_drm_crtc_destroy,
.set_property = sti_drm_crtc_set_property,
};
bool sti_drm_crtc_is_main(struct drm_crtc *crtc)
{
struct sti_mixer *mixer = to_sti_mixer(crtc);
if (mixer->id == STI_MIXER_MAIN)
return true;
return false;
}
int sti_drm_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer,
struct drm_plane *primary, struct drm_plane *cursor)
{
struct drm_crtc *crtc = &mixer->drm_crtc;
int res;
res = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor,
&sti_crtc_funcs);
if (res) {
DRM_ERROR("Can not initialze CRTC\n");
return -EINVAL;
}
drm_crtc_helper_add(crtc, &sti_crtc_helper_funcs);
DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n",
crtc->base.id, sti_mixer_to_str(mixer));
return 0;
}

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@ -0,0 +1,22 @@
/*
* Copyright (C) STMicroelectronics SA 2014
* Author: Benjamin Gaignard <benjamin.gaignard@st.com> for STMicroelectronics.
* License terms: GNU General Public License (GPL), version 2
*/
#ifndef _STI_DRM_CRTC_H_
#define _STI_DRM_CRTC_H_
#include <drm/drmP.h>
struct sti_mixer;
int sti_drm_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer,
struct drm_plane *primary, struct drm_plane *cursor);
int sti_drm_crtc_enable_vblank(struct drm_device *dev, int crtc);
void sti_drm_crtc_disable_vblank(struct drm_device *dev, int crtc);
int sti_drm_crtc_vblank_cb(struct notifier_block *nb,
unsigned long event, void *data);
bool sti_drm_crtc_is_main(struct drm_crtc *drm_crtc);
#endif

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@ -0,0 +1,241 @@
/*
* Copyright (C) STMicroelectronics SA 2014
* Author: Benjamin Gaignard <benjamin.gaignard@st.com> for STMicroelectronics.
* License terms: GNU General Public License (GPL), version 2
*/
#include <drm/drmP.h>
#include <linux/component.h>
#include <linux/debugfs.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include "sti_drm_drv.h"
#include "sti_drm_crtc.h"
#define DRIVER_NAME "sti"
#define DRIVER_DESC "STMicroelectronics SoC DRM"
#define DRIVER_DATE "20140601"
#define DRIVER_MAJOR 1
#define DRIVER_MINOR 0
#define STI_MAX_FB_HEIGHT 4096
#define STI_MAX_FB_WIDTH 4096
static struct drm_mode_config_funcs sti_drm_mode_config_funcs = {
.fb_create = drm_fb_cma_create,
};
static void sti_drm_mode_config_init(struct drm_device *dev)
{
dev->mode_config.min_width = 0;
dev->mode_config.min_height = 0;
/*
* set max width and height as default value.
* this value would be used to check framebuffer size limitation
* at drm_mode_addfb().
*/
dev->mode_config.max_width = STI_MAX_FB_HEIGHT;
dev->mode_config.max_height = STI_MAX_FB_WIDTH;
dev->mode_config.funcs = &sti_drm_mode_config_funcs;
}
static int sti_drm_load(struct drm_device *dev, unsigned long flags)
{
struct sti_drm_private *private;
int ret;
private = kzalloc(sizeof(struct sti_drm_private), GFP_KERNEL);
if (!private) {
DRM_ERROR("Failed to allocate private\n");
return -ENOMEM;
}
dev->dev_private = (void *)private;
private->drm_dev = dev;
drm_mode_config_init(dev);
drm_kms_helper_poll_init(dev);
sti_drm_mode_config_init(dev);
ret = component_bind_all(dev->dev, dev);
if (ret)
return ret;
drm_helper_disable_unused_functions(dev);
#ifdef CONFIG_DRM_STI_FBDEV
drm_fbdev_cma_init(dev, 32,
dev->mode_config.num_crtc,
dev->mode_config.num_connector);
#endif
return 0;
}
static const struct file_operations sti_drm_driver_fops = {
.owner = THIS_MODULE,
.open = drm_open,
.mmap = drm_gem_cma_mmap,
.poll = drm_poll,
.read = drm_read,
.unlocked_ioctl = drm_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = drm_compat_ioctl,
#endif
.release = drm_release,
};
static struct dma_buf *sti_drm_gem_prime_export(struct drm_device *dev,
struct drm_gem_object *obj,
int flags)
{
/* we want to be able to write in mmapped buffer */
flags |= O_RDWR;
return drm_gem_prime_export(dev, obj, flags);
}
static struct drm_driver sti_drm_driver = {
.driver_features = DRIVER_HAVE_IRQ | DRIVER_MODESET |
DRIVER_GEM | DRIVER_PRIME,
.load = sti_drm_load,
.gem_free_object = drm_gem_cma_free_object,
.gem_vm_ops = &drm_gem_cma_vm_ops,
.dumb_create = drm_gem_cma_dumb_create,
.dumb_map_offset = drm_gem_cma_dumb_map_offset,
.dumb_destroy = drm_gem_dumb_destroy,
.fops = &sti_drm_driver_fops,
.get_vblank_counter = drm_vblank_count,
.enable_vblank = sti_drm_crtc_enable_vblank,
.disable_vblank = sti_drm_crtc_disable_vblank,
.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
.gem_prime_export = sti_drm_gem_prime_export,
.gem_prime_import = drm_gem_prime_import,
.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
.gem_prime_vmap = drm_gem_cma_prime_vmap,
.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
.gem_prime_mmap = drm_gem_cma_prime_mmap,
.name = DRIVER_NAME,
.desc = DRIVER_DESC,
.date = DRIVER_DATE,
.major = DRIVER_MAJOR,
.minor = DRIVER_MINOR,
};
static int compare_of(struct device *dev, void *data)
{
return dev->of_node == data;
}
static int sti_drm_bind(struct device *dev)
{
return drm_platform_init(&sti_drm_driver, to_platform_device(dev));
}
static void sti_drm_unbind(struct device *dev)
{
drm_put_dev(dev_get_drvdata(dev));
}
static const struct component_master_ops sti_drm_ops = {
.bind = sti_drm_bind,
.unbind = sti_drm_unbind,
};
static int sti_drm_master_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *node = dev->parent->of_node;
struct device_node *child_np;
struct component_match *match = NULL;
dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
child_np = of_get_next_available_child(node, NULL);
while (child_np) {
component_match_add(dev, &match, compare_of, child_np);
of_node_put(child_np);
child_np = of_get_next_available_child(node, child_np);
}
return component_master_add_with_match(dev, &sti_drm_ops, match);
}
static int sti_drm_master_remove(struct platform_device *pdev)
{
component_master_del(&pdev->dev, &sti_drm_ops);
return 0;
}
static struct platform_driver sti_drm_master_driver = {
.probe = sti_drm_master_probe,
.remove = sti_drm_master_remove,
.driver = {
.owner = THIS_MODULE,
.name = DRIVER_NAME "__master",
},
};
static int sti_drm_platform_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *node = dev->of_node;
struct platform_device *master;
of_platform_populate(node, NULL, NULL, dev);
platform_driver_register(&sti_drm_master_driver);
master = platform_device_register_resndata(dev,
DRIVER_NAME "__master", -1,
NULL, 0, NULL, 0);
if (!master)
return -EINVAL;
platform_set_drvdata(pdev, master);
return 0;
}
static int sti_drm_platform_remove(struct platform_device *pdev)
{
struct platform_device *master = platform_get_drvdata(pdev);
of_platform_depopulate(&pdev->dev);
platform_device_unregister(master);
platform_driver_unregister(&sti_drm_master_driver);
return 0;
}
static const struct of_device_id sti_drm_dt_ids[] = {
{ .compatible = "st,sti-display-subsystem", },
{ /* end node */ },
};
MODULE_DEVICE_TABLE(of, sti_drm_dt_ids);
static struct platform_driver sti_drm_platform_driver = {
.probe = sti_drm_platform_probe,
.remove = sti_drm_platform_remove,
.driver = {
.owner = THIS_MODULE,
.name = DRIVER_NAME,
.of_match_table = sti_drm_dt_ids,
},
};
module_platform_driver(sti_drm_platform_driver);
MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
MODULE_LICENSE("GPL");

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/*
* Copyright (C) STMicroelectronics SA 2014
* Author: Benjamin Gaignard <benjamin.gaignard@st.com> for STMicroelectronics.
* License terms: GNU General Public License (GPL), version 2
*/
#ifndef _STI_DRM_DRV_H_
#define _STI_DRM_DRV_H_
#include <drm/drmP.h>
struct sti_compositor;
struct sti_tvout;
/**
* STI drm private structure
* This structure is stored as private in the drm_device
*
* @compo: compositor
* @plane_zorder_property: z-order property for CRTC planes
* @drm_dev: drm device
*/
struct sti_drm_private {
struct sti_compositor *compo;
struct drm_property *plane_zorder_property;
struct drm_device *drm_dev;
};
#endif

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/*
* Copyright (C) STMicroelectronics SA 2014
* Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
* Fabien Dessenne <fabien.dessenne@st.com>
* for STMicroelectronics.
* License terms: GNU General Public License (GPL), version 2
*/
#include "sti_compositor.h"
#include "sti_drm_drv.h"
#include "sti_drm_plane.h"
#include "sti_vtg.h"
enum sti_layer_desc sti_layer_default_zorder[] = {
STI_GDP_0,
STI_VID_0,
STI_GDP_1,
STI_VID_1,
STI_GDP_2,
STI_GDP_3,
};
/* (Background) < GDP0 < VID0 < GDP1 < VID1 < GDP2 < GDP3 < (ForeGround) */
static int
sti_drm_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
struct drm_framebuffer *fb, int crtc_x, int crtc_y,
unsigned int crtc_w, unsigned int crtc_h,
uint32_t src_x, uint32_t src_y,
uint32_t src_w, uint32_t src_h)
{
struct sti_layer *layer = to_sti_layer(plane);
struct sti_mixer *mixer = to_sti_mixer(crtc);
int res;
DRM_DEBUG_KMS("CRTC:%d (%s) drm plane:%d (%s) drm fb:%d\n",
crtc->base.id, sti_mixer_to_str(mixer),
plane->base.id, sti_layer_to_str(layer), fb->base.id);
DRM_DEBUG_KMS("(%dx%d)@(%d,%d)\n", crtc_w, crtc_h, crtc_x, crtc_y);
res = sti_mixer_set_layer_depth(mixer, layer);
if (res) {
DRM_ERROR("Can not set layer depth\n");
return res;
}
/* src_x are in 16.16 format. */
res = sti_layer_prepare(layer, fb, &crtc->mode, mixer->id,
crtc_x, crtc_y, crtc_w, crtc_h,
src_x >> 16, src_y >> 16,
src_w >> 16, src_h >> 16);
if (res) {
DRM_ERROR("Layer prepare failed\n");
return res;
}
res = sti_layer_commit(layer);
if (res) {
DRM_ERROR("Layer commit failed\n");
return res;
}
res = sti_mixer_set_layer_status(mixer, layer, true);
if (res) {
DRM_ERROR("Can not enable layer at mixer\n");
return res;
}
return 0;
}
static int sti_drm_disable_plane(struct drm_plane *plane)
{
struct sti_layer *layer;
struct sti_mixer *mixer;
int lay_res, mix_res;
if (!plane->crtc) {
DRM_DEBUG_DRIVER("drm plane:%d not enabled\n", plane->base.id);
return 0;
}
layer = to_sti_layer(plane);
mixer = to_sti_mixer(plane->crtc);
DRM_DEBUG_DRIVER("CRTC:%d (%s) drm plane:%d (%s)\n",
plane->crtc->base.id, sti_mixer_to_str(mixer),
plane->base.id, sti_layer_to_str(layer));
/* Disable layer at mixer level */
mix_res = sti_mixer_set_layer_status(mixer, layer, false);
if (mix_res)
DRM_ERROR("Can not disable layer at mixer\n");
/* Wait a while to be sure that a Vsync event is received */
msleep(WAIT_NEXT_VSYNC_MS);
/* Then disable layer itself */
lay_res = sti_layer_disable(layer);
if (lay_res)
DRM_ERROR("Layer disable failed\n");
if (lay_res || mix_res)
return -EINVAL;
return 0;
}
static void sti_drm_plane_destroy(struct drm_plane *plane)
{
DRM_DEBUG_DRIVER("\n");
sti_drm_disable_plane(plane);
drm_plane_cleanup(plane);
}
static int sti_drm_plane_set_property(struct drm_plane *plane,
struct drm_property *property,
uint64_t val)
{
struct drm_device *dev = plane->dev;
struct sti_drm_private *private = dev->dev_private;
struct sti_layer *layer = to_sti_layer(plane);
DRM_DEBUG_DRIVER("\n");
if (property == private->plane_zorder_property) {
layer->zorder = val;
return 0;
}
return -EINVAL;
}
static struct drm_plane_funcs sti_drm_plane_funcs = {
.update_plane = sti_drm_update_plane,
.disable_plane = sti_drm_disable_plane,
.destroy = sti_drm_plane_destroy,
.set_property = sti_drm_plane_set_property,
};
static void sti_drm_plane_attach_zorder_property(struct drm_plane *plane,
uint64_t default_val)
{
struct drm_device *dev = plane->dev;
struct sti_drm_private *private = dev->dev_private;
struct drm_property *prop;
struct sti_layer *layer = to_sti_layer(plane);
prop = private->plane_zorder_property;
if (!prop) {
prop = drm_property_create_range(dev, 0, "zpos", 0,
GAM_MIXER_NB_DEPTH_LEVEL - 1);
if (!prop)
return;
private->plane_zorder_property = prop;
}
drm_object_attach_property(&plane->base, prop, default_val);
layer->zorder = default_val;
}
struct drm_plane *sti_drm_plane_init(struct drm_device *dev,
struct sti_layer *layer,
unsigned int possible_crtcs,
enum drm_plane_type type)
{
int err, i;
uint64_t default_zorder = 0;
err = drm_universal_plane_init(dev, &layer->plane, possible_crtcs,
&sti_drm_plane_funcs,
sti_layer_get_formats(layer),
sti_layer_get_nb_formats(layer), type);
if (err) {
DRM_ERROR("Failed to initialize plane\n");
return NULL;
}
for (i = 0; i < ARRAY_SIZE(sti_layer_default_zorder); i++)
if (sti_layer_default_zorder[i] == layer->desc)
break;
default_zorder = i;
if (type == DRM_PLANE_TYPE_OVERLAY)
sti_drm_plane_attach_zorder_property(&layer->plane,
default_zorder);
DRM_DEBUG_DRIVER("drm plane:%d mapped to %s with zorder:%llu\n",
layer->plane.base.id,
sti_layer_to_str(layer), default_zorder);
return &layer->plane;
}

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/*
* Copyright (C) STMicroelectronics SA 2014
* Author: Benjamin Gaignard <benjamin.gaignard@st.com> for STMicroelectronics.
* License terms: GNU General Public License (GPL), version 2
*/
#ifndef _STI_DRM_PLANE_H_
#define _STI_DRM_PLANE_H_
#include <drm/drmP.h>
struct sti_layer;
struct drm_plane *sti_drm_plane_init(struct drm_device *dev,
struct sti_layer *layer,
unsigned int possible_crtcs,
enum drm_plane_type type);
#endif