![Chris Wilson](/assets/img/avatar_default.png)
In the absence of configuration data for providing the fixed mode for a panel, I would like to be able to pass such modes along a separate module paramenter. To do so, I then need to parse a modeline from a string, which drm is already capable of. Export that capability to the drivers. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Dave Airlie <airlied@redhat.com>
1458 lines
38 KiB
C
1458 lines
38 KiB
C
/*
|
|
* Copyright (c) 2006-2009 Red Hat Inc.
|
|
* Copyright (c) 2006-2008 Intel Corporation
|
|
* Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
|
|
*
|
|
* DRM framebuffer helper functions
|
|
*
|
|
* Permission to use, copy, modify, distribute, and sell this software and its
|
|
* documentation for any purpose is hereby granted without fee, provided that
|
|
* the above copyright notice appear in all copies and that both that copyright
|
|
* notice and this permission notice appear in supporting documentation, and
|
|
* that the name of the copyright holders not be used in advertising or
|
|
* publicity pertaining to distribution of the software without specific,
|
|
* written prior permission. The copyright holders make no representations
|
|
* about the suitability of this software for any purpose. It is provided "as
|
|
* is" without express or implied warranty.
|
|
*
|
|
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
|
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
|
|
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
|
|
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
|
|
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
|
|
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
|
|
* OF THIS SOFTWARE.
|
|
*
|
|
* Authors:
|
|
* Dave Airlie <airlied@linux.ie>
|
|
* Jesse Barnes <jesse.barnes@intel.com>
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/sysrq.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/fb.h>
|
|
#include "drmP.h"
|
|
#include "drm_crtc.h"
|
|
#include "drm_fb_helper.h"
|
|
#include "drm_crtc_helper.h"
|
|
|
|
MODULE_AUTHOR("David Airlie, Jesse Barnes");
|
|
MODULE_DESCRIPTION("DRM KMS helper");
|
|
MODULE_LICENSE("GPL and additional rights");
|
|
|
|
static LIST_HEAD(kernel_fb_helper_list);
|
|
|
|
/* simple single crtc case helper function */
|
|
int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
|
|
{
|
|
struct drm_device *dev = fb_helper->dev;
|
|
struct drm_connector *connector;
|
|
int i;
|
|
|
|
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
|
|
struct drm_fb_helper_connector *fb_helper_connector;
|
|
|
|
fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL);
|
|
if (!fb_helper_connector)
|
|
goto fail;
|
|
|
|
fb_helper_connector->connector = connector;
|
|
fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector;
|
|
}
|
|
return 0;
|
|
fail:
|
|
for (i = 0; i < fb_helper->connector_count; i++) {
|
|
kfree(fb_helper->connector_info[i]);
|
|
fb_helper->connector_info[i] = NULL;
|
|
}
|
|
fb_helper->connector_count = 0;
|
|
return -ENOMEM;
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors);
|
|
|
|
static int drm_fb_helper_parse_command_line(struct drm_fb_helper *fb_helper)
|
|
{
|
|
struct drm_fb_helper_connector *fb_helper_conn;
|
|
int i;
|
|
|
|
for (i = 0; i < fb_helper->connector_count; i++) {
|
|
struct drm_cmdline_mode *mode;
|
|
struct drm_connector *connector;
|
|
char *option = NULL;
|
|
|
|
fb_helper_conn = fb_helper->connector_info[i];
|
|
connector = fb_helper_conn->connector;
|
|
mode = &fb_helper_conn->cmdline_mode;
|
|
|
|
/* do something on return - turn off connector maybe */
|
|
if (fb_get_options(drm_get_connector_name(connector), &option))
|
|
continue;
|
|
|
|
if (drm_mode_parse_command_line_for_connector(option,
|
|
connector,
|
|
mode)) {
|
|
if (mode->force) {
|
|
const char *s;
|
|
switch (mode->force) {
|
|
case DRM_FORCE_OFF: s = "OFF"; break;
|
|
case DRM_FORCE_ON_DIGITAL: s = "ON - dig"; break;
|
|
default:
|
|
case DRM_FORCE_ON: s = "ON"; break;
|
|
}
|
|
|
|
DRM_INFO("forcing %s connector %s\n",
|
|
drm_get_connector_name(connector), s);
|
|
connector->force = mode->force;
|
|
}
|
|
|
|
DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
|
|
drm_get_connector_name(connector),
|
|
mode->xres, mode->yres,
|
|
mode->refresh_specified ? mode->refresh : 60,
|
|
mode->rb ? " reduced blanking" : "",
|
|
mode->margins ? " with margins" : "",
|
|
mode->interlace ? " interlaced" : "");
|
|
}
|
|
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper)
|
|
{
|
|
uint16_t *r_base, *g_base, *b_base;
|
|
int i;
|
|
|
|
r_base = crtc->gamma_store;
|
|
g_base = r_base + crtc->gamma_size;
|
|
b_base = g_base + crtc->gamma_size;
|
|
|
|
for (i = 0; i < crtc->gamma_size; i++)
|
|
helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i);
|
|
}
|
|
|
|
static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc)
|
|
{
|
|
uint16_t *r_base, *g_base, *b_base;
|
|
|
|
r_base = crtc->gamma_store;
|
|
g_base = r_base + crtc->gamma_size;
|
|
b_base = g_base + crtc->gamma_size;
|
|
|
|
crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
|
|
}
|
|
|
|
int drm_fb_helper_debug_enter(struct fb_info *info)
|
|
{
|
|
struct drm_fb_helper *helper = info->par;
|
|
struct drm_crtc_helper_funcs *funcs;
|
|
int i;
|
|
|
|
if (list_empty(&kernel_fb_helper_list))
|
|
return false;
|
|
|
|
list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
|
|
for (i = 0; i < helper->crtc_count; i++) {
|
|
struct drm_mode_set *mode_set =
|
|
&helper->crtc_info[i].mode_set;
|
|
|
|
if (!mode_set->crtc->enabled)
|
|
continue;
|
|
|
|
funcs = mode_set->crtc->helper_private;
|
|
drm_fb_helper_save_lut_atomic(mode_set->crtc, helper);
|
|
funcs->mode_set_base_atomic(mode_set->crtc,
|
|
mode_set->fb,
|
|
mode_set->x,
|
|
mode_set->y,
|
|
ENTER_ATOMIC_MODE_SET);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_debug_enter);
|
|
|
|
/* Find the real fb for a given fb helper CRTC */
|
|
static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc)
|
|
{
|
|
struct drm_device *dev = crtc->dev;
|
|
struct drm_crtc *c;
|
|
|
|
list_for_each_entry(c, &dev->mode_config.crtc_list, head) {
|
|
if (crtc->base.id == c->base.id)
|
|
return c->fb;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
int drm_fb_helper_debug_leave(struct fb_info *info)
|
|
{
|
|
struct drm_fb_helper *helper = info->par;
|
|
struct drm_crtc *crtc;
|
|
struct drm_crtc_helper_funcs *funcs;
|
|
struct drm_framebuffer *fb;
|
|
int i;
|
|
|
|
for (i = 0; i < helper->crtc_count; i++) {
|
|
struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set;
|
|
crtc = mode_set->crtc;
|
|
funcs = crtc->helper_private;
|
|
fb = drm_mode_config_fb(crtc);
|
|
|
|
if (!crtc->enabled)
|
|
continue;
|
|
|
|
if (!fb) {
|
|
DRM_ERROR("no fb to restore??\n");
|
|
continue;
|
|
}
|
|
|
|
drm_fb_helper_restore_lut_atomic(mode_set->crtc);
|
|
funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x,
|
|
crtc->y, LEAVE_ATOMIC_MODE_SET);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_debug_leave);
|
|
|
|
bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper)
|
|
{
|
|
bool error = false;
|
|
int i, ret;
|
|
for (i = 0; i < fb_helper->crtc_count; i++) {
|
|
struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set;
|
|
ret = drm_crtc_helper_set_config(mode_set);
|
|
if (ret)
|
|
error = true;
|
|
}
|
|
return error;
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode);
|
|
|
|
bool drm_fb_helper_force_kernel_mode(void)
|
|
{
|
|
bool ret, error = false;
|
|
struct drm_fb_helper *helper;
|
|
|
|
if (list_empty(&kernel_fb_helper_list))
|
|
return false;
|
|
|
|
list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
|
|
if (helper->dev->switch_power_state == DRM_SWITCH_POWER_OFF)
|
|
continue;
|
|
|
|
ret = drm_fb_helper_restore_fbdev_mode(helper);
|
|
if (ret)
|
|
error = true;
|
|
}
|
|
return error;
|
|
}
|
|
|
|
int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed,
|
|
void *panic_str)
|
|
{
|
|
printk(KERN_ERR "panic occurred, switching back to text console\n");
|
|
return drm_fb_helper_force_kernel_mode();
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_panic);
|
|
|
|
static struct notifier_block paniced = {
|
|
.notifier_call = drm_fb_helper_panic,
|
|
};
|
|
|
|
/**
|
|
* drm_fb_helper_restore - restore the framebuffer console (kernel) config
|
|
*
|
|
* Restore's the kernel's fbcon mode, used for lastclose & panic paths.
|
|
*/
|
|
void drm_fb_helper_restore(void)
|
|
{
|
|
bool ret;
|
|
ret = drm_fb_helper_force_kernel_mode();
|
|
if (ret == true)
|
|
DRM_ERROR("Failed to restore crtc configuration\n");
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_restore);
|
|
|
|
#ifdef CONFIG_MAGIC_SYSRQ
|
|
static void drm_fb_helper_restore_work_fn(struct work_struct *ignored)
|
|
{
|
|
drm_fb_helper_restore();
|
|
}
|
|
static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn);
|
|
|
|
static void drm_fb_helper_sysrq(int dummy1)
|
|
{
|
|
schedule_work(&drm_fb_helper_restore_work);
|
|
}
|
|
|
|
static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = {
|
|
.handler = drm_fb_helper_sysrq,
|
|
.help_msg = "force-fb(V)",
|
|
.action_msg = "Restore framebuffer console",
|
|
};
|
|
#else
|
|
static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { };
|
|
#endif
|
|
|
|
static void drm_fb_helper_on(struct fb_info *info)
|
|
{
|
|
struct drm_fb_helper *fb_helper = info->par;
|
|
struct drm_device *dev = fb_helper->dev;
|
|
struct drm_crtc *crtc;
|
|
struct drm_crtc_helper_funcs *crtc_funcs;
|
|
struct drm_connector *connector;
|
|
struct drm_encoder *encoder;
|
|
int i, j;
|
|
|
|
/*
|
|
* For each CRTC in this fb, turn the crtc on then,
|
|
* find all associated encoders and turn them on.
|
|
*/
|
|
mutex_lock(&dev->mode_config.mutex);
|
|
for (i = 0; i < fb_helper->crtc_count; i++) {
|
|
crtc = fb_helper->crtc_info[i].mode_set.crtc;
|
|
crtc_funcs = crtc->helper_private;
|
|
|
|
if (!crtc->enabled)
|
|
continue;
|
|
|
|
crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
|
|
|
|
/* Walk the connectors & encoders on this fb turning them on */
|
|
for (j = 0; j < fb_helper->connector_count; j++) {
|
|
connector = fb_helper->connector_info[j]->connector;
|
|
connector->dpms = DRM_MODE_DPMS_ON;
|
|
drm_connector_property_set_value(connector,
|
|
dev->mode_config.dpms_property,
|
|
DRM_MODE_DPMS_ON);
|
|
}
|
|
/* Found a CRTC on this fb, now find encoders */
|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
|
|
if (encoder->crtc == crtc) {
|
|
struct drm_encoder_helper_funcs *encoder_funcs;
|
|
|
|
encoder_funcs = encoder->helper_private;
|
|
encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
|
|
}
|
|
}
|
|
}
|
|
mutex_unlock(&dev->mode_config.mutex);
|
|
}
|
|
|
|
static void drm_fb_helper_off(struct fb_info *info, int dpms_mode)
|
|
{
|
|
struct drm_fb_helper *fb_helper = info->par;
|
|
struct drm_device *dev = fb_helper->dev;
|
|
struct drm_crtc *crtc;
|
|
struct drm_crtc_helper_funcs *crtc_funcs;
|
|
struct drm_connector *connector;
|
|
struct drm_encoder *encoder;
|
|
int i, j;
|
|
|
|
/*
|
|
* For each CRTC in this fb, find all associated encoders
|
|
* and turn them off, then turn off the CRTC.
|
|
*/
|
|
mutex_lock(&dev->mode_config.mutex);
|
|
for (i = 0; i < fb_helper->crtc_count; i++) {
|
|
crtc = fb_helper->crtc_info[i].mode_set.crtc;
|
|
crtc_funcs = crtc->helper_private;
|
|
|
|
if (!crtc->enabled)
|
|
continue;
|
|
|
|
/* Walk the connectors on this fb and mark them off */
|
|
for (j = 0; j < fb_helper->connector_count; j++) {
|
|
connector = fb_helper->connector_info[j]->connector;
|
|
connector->dpms = dpms_mode;
|
|
drm_connector_property_set_value(connector,
|
|
dev->mode_config.dpms_property,
|
|
dpms_mode);
|
|
}
|
|
/* Found a CRTC on this fb, now find encoders */
|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
|
|
if (encoder->crtc == crtc) {
|
|
struct drm_encoder_helper_funcs *encoder_funcs;
|
|
|
|
encoder_funcs = encoder->helper_private;
|
|
encoder_funcs->dpms(encoder, dpms_mode);
|
|
}
|
|
}
|
|
crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
|
|
}
|
|
mutex_unlock(&dev->mode_config.mutex);
|
|
}
|
|
|
|
int drm_fb_helper_blank(int blank, struct fb_info *info)
|
|
{
|
|
switch (blank) {
|
|
/* Display: On; HSync: On, VSync: On */
|
|
case FB_BLANK_UNBLANK:
|
|
drm_fb_helper_on(info);
|
|
break;
|
|
/* Display: Off; HSync: On, VSync: On */
|
|
case FB_BLANK_NORMAL:
|
|
drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
|
|
break;
|
|
/* Display: Off; HSync: Off, VSync: On */
|
|
case FB_BLANK_HSYNC_SUSPEND:
|
|
drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
|
|
break;
|
|
/* Display: Off; HSync: On, VSync: Off */
|
|
case FB_BLANK_VSYNC_SUSPEND:
|
|
drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND);
|
|
break;
|
|
/* Display: Off; HSync: Off, VSync: Off */
|
|
case FB_BLANK_POWERDOWN:
|
|
drm_fb_helper_off(info, DRM_MODE_DPMS_OFF);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_blank);
|
|
|
|
static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < helper->connector_count; i++)
|
|
kfree(helper->connector_info[i]);
|
|
kfree(helper->connector_info);
|
|
for (i = 0; i < helper->crtc_count; i++)
|
|
kfree(helper->crtc_info[i].mode_set.connectors);
|
|
kfree(helper->crtc_info);
|
|
}
|
|
|
|
int drm_fb_helper_init(struct drm_device *dev,
|
|
struct drm_fb_helper *fb_helper,
|
|
int crtc_count, int max_conn_count)
|
|
{
|
|
struct drm_crtc *crtc;
|
|
int ret = 0;
|
|
int i;
|
|
|
|
fb_helper->dev = dev;
|
|
|
|
INIT_LIST_HEAD(&fb_helper->kernel_fb_list);
|
|
|
|
fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL);
|
|
if (!fb_helper->crtc_info)
|
|
return -ENOMEM;
|
|
|
|
fb_helper->crtc_count = crtc_count;
|
|
fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL);
|
|
if (!fb_helper->connector_info) {
|
|
kfree(fb_helper->crtc_info);
|
|
return -ENOMEM;
|
|
}
|
|
fb_helper->connector_count = 0;
|
|
|
|
for (i = 0; i < crtc_count; i++) {
|
|
fb_helper->crtc_info[i].mode_set.connectors =
|
|
kcalloc(max_conn_count,
|
|
sizeof(struct drm_connector *),
|
|
GFP_KERNEL);
|
|
|
|
if (!fb_helper->crtc_info[i].mode_set.connectors) {
|
|
ret = -ENOMEM;
|
|
goto out_free;
|
|
}
|
|
fb_helper->crtc_info[i].mode_set.num_connectors = 0;
|
|
}
|
|
|
|
i = 0;
|
|
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
|
|
fb_helper->crtc_info[i].crtc_id = crtc->base.id;
|
|
fb_helper->crtc_info[i].mode_set.crtc = crtc;
|
|
i++;
|
|
}
|
|
fb_helper->conn_limit = max_conn_count;
|
|
return 0;
|
|
out_free:
|
|
drm_fb_helper_crtc_free(fb_helper);
|
|
return -ENOMEM;
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_init);
|
|
|
|
void drm_fb_helper_fini(struct drm_fb_helper *fb_helper)
|
|
{
|
|
if (!list_empty(&fb_helper->kernel_fb_list)) {
|
|
list_del(&fb_helper->kernel_fb_list);
|
|
if (list_empty(&kernel_fb_helper_list)) {
|
|
printk(KERN_INFO "drm: unregistered panic notifier\n");
|
|
atomic_notifier_chain_unregister(&panic_notifier_list,
|
|
&paniced);
|
|
unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
|
|
}
|
|
}
|
|
|
|
drm_fb_helper_crtc_free(fb_helper);
|
|
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_fini);
|
|
|
|
static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,
|
|
u16 blue, u16 regno, struct fb_info *info)
|
|
{
|
|
struct drm_fb_helper *fb_helper = info->par;
|
|
struct drm_framebuffer *fb = fb_helper->fb;
|
|
int pindex;
|
|
|
|
if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
|
|
u32 *palette;
|
|
u32 value;
|
|
/* place color in psuedopalette */
|
|
if (regno > 16)
|
|
return -EINVAL;
|
|
palette = (u32 *)info->pseudo_palette;
|
|
red >>= (16 - info->var.red.length);
|
|
green >>= (16 - info->var.green.length);
|
|
blue >>= (16 - info->var.blue.length);
|
|
value = (red << info->var.red.offset) |
|
|
(green << info->var.green.offset) |
|
|
(blue << info->var.blue.offset);
|
|
if (info->var.transp.length > 0) {
|
|
u32 mask = (1 << info->var.transp.length) - 1;
|
|
mask <<= info->var.transp.offset;
|
|
value |= mask;
|
|
}
|
|
palette[regno] = value;
|
|
return 0;
|
|
}
|
|
|
|
pindex = regno;
|
|
|
|
if (fb->bits_per_pixel == 16) {
|
|
pindex = regno << 3;
|
|
|
|
if (fb->depth == 16 && regno > 63)
|
|
return -EINVAL;
|
|
if (fb->depth == 15 && regno > 31)
|
|
return -EINVAL;
|
|
|
|
if (fb->depth == 16) {
|
|
u16 r, g, b;
|
|
int i;
|
|
if (regno < 32) {
|
|
for (i = 0; i < 8; i++)
|
|
fb_helper->funcs->gamma_set(crtc, red,
|
|
green, blue, pindex + i);
|
|
}
|
|
|
|
fb_helper->funcs->gamma_get(crtc, &r,
|
|
&g, &b,
|
|
pindex >> 1);
|
|
|
|
for (i = 0; i < 4; i++)
|
|
fb_helper->funcs->gamma_set(crtc, r,
|
|
green, b,
|
|
(pindex >> 1) + i);
|
|
}
|
|
}
|
|
|
|
if (fb->depth != 16)
|
|
fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex);
|
|
return 0;
|
|
}
|
|
|
|
int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
|
|
{
|
|
struct drm_fb_helper *fb_helper = info->par;
|
|
struct drm_crtc_helper_funcs *crtc_funcs;
|
|
u16 *red, *green, *blue, *transp;
|
|
struct drm_crtc *crtc;
|
|
int i, j, rc = 0;
|
|
int start;
|
|
|
|
for (i = 0; i < fb_helper->crtc_count; i++) {
|
|
crtc = fb_helper->crtc_info[i].mode_set.crtc;
|
|
crtc_funcs = crtc->helper_private;
|
|
|
|
red = cmap->red;
|
|
green = cmap->green;
|
|
blue = cmap->blue;
|
|
transp = cmap->transp;
|
|
start = cmap->start;
|
|
|
|
for (j = 0; j < cmap->len; j++) {
|
|
u16 hred, hgreen, hblue, htransp = 0xffff;
|
|
|
|
hred = *red++;
|
|
hgreen = *green++;
|
|
hblue = *blue++;
|
|
|
|
if (transp)
|
|
htransp = *transp++;
|
|
|
|
rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);
|
|
if (rc)
|
|
return rc;
|
|
}
|
|
crtc_funcs->load_lut(crtc);
|
|
}
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_setcmap);
|
|
|
|
int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
|
|
struct fb_info *info)
|
|
{
|
|
struct drm_fb_helper *fb_helper = info->par;
|
|
struct drm_framebuffer *fb = fb_helper->fb;
|
|
int depth;
|
|
|
|
if (var->pixclock != 0 || in_dbg_master())
|
|
return -EINVAL;
|
|
|
|
/* Need to resize the fb object !!! */
|
|
if (var->bits_per_pixel > fb->bits_per_pixel || var->xres > fb->width || var->yres > fb->height) {
|
|
DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "
|
|
"object %dx%d-%d > %dx%d-%d\n", var->xres, var->yres, var->bits_per_pixel,
|
|
fb->width, fb->height, fb->bits_per_pixel);
|
|
return -EINVAL;
|
|
}
|
|
|
|
switch (var->bits_per_pixel) {
|
|
case 16:
|
|
depth = (var->green.length == 6) ? 16 : 15;
|
|
break;
|
|
case 32:
|
|
depth = (var->transp.length > 0) ? 32 : 24;
|
|
break;
|
|
default:
|
|
depth = var->bits_per_pixel;
|
|
break;
|
|
}
|
|
|
|
switch (depth) {
|
|
case 8:
|
|
var->red.offset = 0;
|
|
var->green.offset = 0;
|
|
var->blue.offset = 0;
|
|
var->red.length = 8;
|
|
var->green.length = 8;
|
|
var->blue.length = 8;
|
|
var->transp.length = 0;
|
|
var->transp.offset = 0;
|
|
break;
|
|
case 15:
|
|
var->red.offset = 10;
|
|
var->green.offset = 5;
|
|
var->blue.offset = 0;
|
|
var->red.length = 5;
|
|
var->green.length = 5;
|
|
var->blue.length = 5;
|
|
var->transp.length = 1;
|
|
var->transp.offset = 15;
|
|
break;
|
|
case 16:
|
|
var->red.offset = 11;
|
|
var->green.offset = 5;
|
|
var->blue.offset = 0;
|
|
var->red.length = 5;
|
|
var->green.length = 6;
|
|
var->blue.length = 5;
|
|
var->transp.length = 0;
|
|
var->transp.offset = 0;
|
|
break;
|
|
case 24:
|
|
var->red.offset = 16;
|
|
var->green.offset = 8;
|
|
var->blue.offset = 0;
|
|
var->red.length = 8;
|
|
var->green.length = 8;
|
|
var->blue.length = 8;
|
|
var->transp.length = 0;
|
|
var->transp.offset = 0;
|
|
break;
|
|
case 32:
|
|
var->red.offset = 16;
|
|
var->green.offset = 8;
|
|
var->blue.offset = 0;
|
|
var->red.length = 8;
|
|
var->green.length = 8;
|
|
var->blue.length = 8;
|
|
var->transp.length = 8;
|
|
var->transp.offset = 24;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_check_var);
|
|
|
|
/* this will let fbcon do the mode init */
|
|
int drm_fb_helper_set_par(struct fb_info *info)
|
|
{
|
|
struct drm_fb_helper *fb_helper = info->par;
|
|
struct drm_device *dev = fb_helper->dev;
|
|
struct fb_var_screeninfo *var = &info->var;
|
|
struct drm_crtc *crtc;
|
|
int ret;
|
|
int i;
|
|
|
|
if (var->pixclock != 0) {
|
|
DRM_ERROR("PIXEL CLOCK SET\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
mutex_lock(&dev->mode_config.mutex);
|
|
for (i = 0; i < fb_helper->crtc_count; i++) {
|
|
crtc = fb_helper->crtc_info[i].mode_set.crtc;
|
|
ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
|
|
if (ret) {
|
|
mutex_unlock(&dev->mode_config.mutex);
|
|
return ret;
|
|
}
|
|
}
|
|
mutex_unlock(&dev->mode_config.mutex);
|
|
|
|
if (fb_helper->delayed_hotplug) {
|
|
fb_helper->delayed_hotplug = false;
|
|
drm_fb_helper_hotplug_event(fb_helper);
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_set_par);
|
|
|
|
int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
|
|
struct fb_info *info)
|
|
{
|
|
struct drm_fb_helper *fb_helper = info->par;
|
|
struct drm_device *dev = fb_helper->dev;
|
|
struct drm_mode_set *modeset;
|
|
struct drm_crtc *crtc;
|
|
int ret = 0;
|
|
int i;
|
|
|
|
mutex_lock(&dev->mode_config.mutex);
|
|
for (i = 0; i < fb_helper->crtc_count; i++) {
|
|
crtc = fb_helper->crtc_info[i].mode_set.crtc;
|
|
|
|
modeset = &fb_helper->crtc_info[i].mode_set;
|
|
|
|
modeset->x = var->xoffset;
|
|
modeset->y = var->yoffset;
|
|
|
|
if (modeset->num_connectors) {
|
|
ret = crtc->funcs->set_config(modeset);
|
|
if (!ret) {
|
|
info->var.xoffset = var->xoffset;
|
|
info->var.yoffset = var->yoffset;
|
|
}
|
|
}
|
|
}
|
|
mutex_unlock(&dev->mode_config.mutex);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_pan_display);
|
|
|
|
int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
|
|
int preferred_bpp)
|
|
{
|
|
int new_fb = 0;
|
|
int crtc_count = 0;
|
|
int i;
|
|
struct fb_info *info;
|
|
struct drm_fb_helper_surface_size sizes;
|
|
int gamma_size = 0;
|
|
|
|
memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size));
|
|
sizes.surface_depth = 24;
|
|
sizes.surface_bpp = 32;
|
|
sizes.fb_width = (unsigned)-1;
|
|
sizes.fb_height = (unsigned)-1;
|
|
|
|
/* if driver picks 8 or 16 by default use that
|
|
for both depth/bpp */
|
|
if (preferred_bpp != sizes.surface_bpp) {
|
|
sizes.surface_depth = sizes.surface_bpp = preferred_bpp;
|
|
}
|
|
/* first up get a count of crtcs now in use and new min/maxes width/heights */
|
|
for (i = 0; i < fb_helper->connector_count; i++) {
|
|
struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i];
|
|
struct drm_cmdline_mode *cmdline_mode;
|
|
|
|
cmdline_mode = &fb_helper_conn->cmdline_mode;
|
|
|
|
if (cmdline_mode->bpp_specified) {
|
|
switch (cmdline_mode->bpp) {
|
|
case 8:
|
|
sizes.surface_depth = sizes.surface_bpp = 8;
|
|
break;
|
|
case 15:
|
|
sizes.surface_depth = 15;
|
|
sizes.surface_bpp = 16;
|
|
break;
|
|
case 16:
|
|
sizes.surface_depth = sizes.surface_bpp = 16;
|
|
break;
|
|
case 24:
|
|
sizes.surface_depth = sizes.surface_bpp = 24;
|
|
break;
|
|
case 32:
|
|
sizes.surface_depth = 24;
|
|
sizes.surface_bpp = 32;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
crtc_count = 0;
|
|
for (i = 0; i < fb_helper->crtc_count; i++) {
|
|
struct drm_display_mode *desired_mode;
|
|
desired_mode = fb_helper->crtc_info[i].desired_mode;
|
|
|
|
if (desired_mode) {
|
|
if (gamma_size == 0)
|
|
gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size;
|
|
if (desired_mode->hdisplay < sizes.fb_width)
|
|
sizes.fb_width = desired_mode->hdisplay;
|
|
if (desired_mode->vdisplay < sizes.fb_height)
|
|
sizes.fb_height = desired_mode->vdisplay;
|
|
if (desired_mode->hdisplay > sizes.surface_width)
|
|
sizes.surface_width = desired_mode->hdisplay;
|
|
if (desired_mode->vdisplay > sizes.surface_height)
|
|
sizes.surface_height = desired_mode->vdisplay;
|
|
crtc_count++;
|
|
}
|
|
}
|
|
|
|
if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) {
|
|
/* hmm everyone went away - assume VGA cable just fell out
|
|
and will come back later. */
|
|
DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n");
|
|
sizes.fb_width = sizes.surface_width = 1024;
|
|
sizes.fb_height = sizes.surface_height = 768;
|
|
}
|
|
|
|
/* push down into drivers */
|
|
new_fb = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes);
|
|
if (new_fb < 0)
|
|
return new_fb;
|
|
|
|
info = fb_helper->fbdev;
|
|
|
|
/* set the fb pointer */
|
|
for (i = 0; i < fb_helper->crtc_count; i++) {
|
|
fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb;
|
|
}
|
|
|
|
if (new_fb) {
|
|
info->var.pixclock = 0;
|
|
if (register_framebuffer(info) < 0) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
|
|
info->fix.id);
|
|
|
|
} else {
|
|
drm_fb_helper_set_par(info);
|
|
}
|
|
|
|
/* Switch back to kernel console on panic */
|
|
/* multi card linked list maybe */
|
|
if (list_empty(&kernel_fb_helper_list)) {
|
|
printk(KERN_INFO "drm: registered panic notifier\n");
|
|
atomic_notifier_chain_register(&panic_notifier_list,
|
|
&paniced);
|
|
register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
|
|
}
|
|
if (new_fb)
|
|
list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_single_fb_probe);
|
|
|
|
void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
|
|
uint32_t depth)
|
|
{
|
|
info->fix.type = FB_TYPE_PACKED_PIXELS;
|
|
info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR :
|
|
FB_VISUAL_TRUECOLOR;
|
|
info->fix.mmio_start = 0;
|
|
info->fix.mmio_len = 0;
|
|
info->fix.type_aux = 0;
|
|
info->fix.xpanstep = 1; /* doing it in hw */
|
|
info->fix.ypanstep = 1; /* doing it in hw */
|
|
info->fix.ywrapstep = 0;
|
|
info->fix.accel = FB_ACCEL_NONE;
|
|
info->fix.type_aux = 0;
|
|
|
|
info->fix.line_length = pitch;
|
|
return;
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_fill_fix);
|
|
|
|
void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
|
|
uint32_t fb_width, uint32_t fb_height)
|
|
{
|
|
struct drm_framebuffer *fb = fb_helper->fb;
|
|
info->pseudo_palette = fb_helper->pseudo_palette;
|
|
info->var.xres_virtual = fb->width;
|
|
info->var.yres_virtual = fb->height;
|
|
info->var.bits_per_pixel = fb->bits_per_pixel;
|
|
info->var.accel_flags = FB_ACCELF_TEXT;
|
|
info->var.xoffset = 0;
|
|
info->var.yoffset = 0;
|
|
info->var.activate = FB_ACTIVATE_NOW;
|
|
info->var.height = -1;
|
|
info->var.width = -1;
|
|
|
|
switch (fb->depth) {
|
|
case 8:
|
|
info->var.red.offset = 0;
|
|
info->var.green.offset = 0;
|
|
info->var.blue.offset = 0;
|
|
info->var.red.length = 8; /* 8bit DAC */
|
|
info->var.green.length = 8;
|
|
info->var.blue.length = 8;
|
|
info->var.transp.offset = 0;
|
|
info->var.transp.length = 0;
|
|
break;
|
|
case 15:
|
|
info->var.red.offset = 10;
|
|
info->var.green.offset = 5;
|
|
info->var.blue.offset = 0;
|
|
info->var.red.length = 5;
|
|
info->var.green.length = 5;
|
|
info->var.blue.length = 5;
|
|
info->var.transp.offset = 15;
|
|
info->var.transp.length = 1;
|
|
break;
|
|
case 16:
|
|
info->var.red.offset = 11;
|
|
info->var.green.offset = 5;
|
|
info->var.blue.offset = 0;
|
|
info->var.red.length = 5;
|
|
info->var.green.length = 6;
|
|
info->var.blue.length = 5;
|
|
info->var.transp.offset = 0;
|
|
break;
|
|
case 24:
|
|
info->var.red.offset = 16;
|
|
info->var.green.offset = 8;
|
|
info->var.blue.offset = 0;
|
|
info->var.red.length = 8;
|
|
info->var.green.length = 8;
|
|
info->var.blue.length = 8;
|
|
info->var.transp.offset = 0;
|
|
info->var.transp.length = 0;
|
|
break;
|
|
case 32:
|
|
info->var.red.offset = 16;
|
|
info->var.green.offset = 8;
|
|
info->var.blue.offset = 0;
|
|
info->var.red.length = 8;
|
|
info->var.green.length = 8;
|
|
info->var.blue.length = 8;
|
|
info->var.transp.offset = 24;
|
|
info->var.transp.length = 8;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
info->var.xres = fb_width;
|
|
info->var.yres = fb_height;
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_fill_var);
|
|
|
|
static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper,
|
|
uint32_t maxX,
|
|
uint32_t maxY)
|
|
{
|
|
struct drm_connector *connector;
|
|
int count = 0;
|
|
int i;
|
|
|
|
for (i = 0; i < fb_helper->connector_count; i++) {
|
|
connector = fb_helper->connector_info[i]->connector;
|
|
count += connector->funcs->fill_modes(connector, maxX, maxY);
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height)
|
|
{
|
|
struct drm_display_mode *mode;
|
|
|
|
list_for_each_entry(mode, &fb_connector->connector->modes, head) {
|
|
if (drm_mode_width(mode) > width ||
|
|
drm_mode_height(mode) > height)
|
|
continue;
|
|
if (mode->type & DRM_MODE_TYPE_PREFERRED)
|
|
return mode;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector)
|
|
{
|
|
struct drm_cmdline_mode *cmdline_mode;
|
|
cmdline_mode = &fb_connector->cmdline_mode;
|
|
return cmdline_mode->specified;
|
|
}
|
|
|
|
static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
|
|
int width, int height)
|
|
{
|
|
struct drm_cmdline_mode *cmdline_mode;
|
|
struct drm_display_mode *mode = NULL;
|
|
|
|
cmdline_mode = &fb_helper_conn->cmdline_mode;
|
|
if (cmdline_mode->specified == false)
|
|
return mode;
|
|
|
|
/* attempt to find a matching mode in the list of modes
|
|
* we have gotten so far, if not add a CVT mode that conforms
|
|
*/
|
|
if (cmdline_mode->rb || cmdline_mode->margins)
|
|
goto create_mode;
|
|
|
|
list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
|
|
/* check width/height */
|
|
if (mode->hdisplay != cmdline_mode->xres ||
|
|
mode->vdisplay != cmdline_mode->yres)
|
|
continue;
|
|
|
|
if (cmdline_mode->refresh_specified) {
|
|
if (mode->vrefresh != cmdline_mode->refresh)
|
|
continue;
|
|
}
|
|
|
|
if (cmdline_mode->interlace) {
|
|
if (!(mode->flags & DRM_MODE_FLAG_INTERLACE))
|
|
continue;
|
|
}
|
|
return mode;
|
|
}
|
|
|
|
create_mode:
|
|
mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev,
|
|
cmdline_mode);
|
|
list_add(&mode->head, &fb_helper_conn->connector->modes);
|
|
return mode;
|
|
}
|
|
|
|
static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
|
|
{
|
|
bool enable;
|
|
|
|
if (strict) {
|
|
enable = connector->status == connector_status_connected;
|
|
} else {
|
|
enable = connector->status != connector_status_disconnected;
|
|
}
|
|
return enable;
|
|
}
|
|
|
|
static void drm_enable_connectors(struct drm_fb_helper *fb_helper,
|
|
bool *enabled)
|
|
{
|
|
bool any_enabled = false;
|
|
struct drm_connector *connector;
|
|
int i = 0;
|
|
|
|
for (i = 0; i < fb_helper->connector_count; i++) {
|
|
connector = fb_helper->connector_info[i]->connector;
|
|
enabled[i] = drm_connector_enabled(connector, true);
|
|
DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id,
|
|
enabled[i] ? "yes" : "no");
|
|
any_enabled |= enabled[i];
|
|
}
|
|
|
|
if (any_enabled)
|
|
return;
|
|
|
|
for (i = 0; i < fb_helper->connector_count; i++) {
|
|
connector = fb_helper->connector_info[i]->connector;
|
|
enabled[i] = drm_connector_enabled(connector, false);
|
|
}
|
|
}
|
|
|
|
static bool drm_target_cloned(struct drm_fb_helper *fb_helper,
|
|
struct drm_display_mode **modes,
|
|
bool *enabled, int width, int height)
|
|
{
|
|
int count, i, j;
|
|
bool can_clone = false;
|
|
struct drm_fb_helper_connector *fb_helper_conn;
|
|
struct drm_display_mode *dmt_mode, *mode;
|
|
|
|
/* only contemplate cloning in the single crtc case */
|
|
if (fb_helper->crtc_count > 1)
|
|
return false;
|
|
|
|
count = 0;
|
|
for (i = 0; i < fb_helper->connector_count; i++) {
|
|
if (enabled[i])
|
|
count++;
|
|
}
|
|
|
|
/* only contemplate cloning if more than one connector is enabled */
|
|
if (count <= 1)
|
|
return false;
|
|
|
|
/* check the command line or if nothing common pick 1024x768 */
|
|
can_clone = true;
|
|
for (i = 0; i < fb_helper->connector_count; i++) {
|
|
if (!enabled[i])
|
|
continue;
|
|
fb_helper_conn = fb_helper->connector_info[i];
|
|
modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
|
|
if (!modes[i]) {
|
|
can_clone = false;
|
|
break;
|
|
}
|
|
for (j = 0; j < i; j++) {
|
|
if (!enabled[j])
|
|
continue;
|
|
if (!drm_mode_equal(modes[j], modes[i]))
|
|
can_clone = false;
|
|
}
|
|
}
|
|
|
|
if (can_clone) {
|
|
DRM_DEBUG_KMS("can clone using command line\n");
|
|
return true;
|
|
}
|
|
|
|
/* try and find a 1024x768 mode on each connector */
|
|
can_clone = true;
|
|
dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60);
|
|
|
|
for (i = 0; i < fb_helper->connector_count; i++) {
|
|
|
|
if (!enabled[i])
|
|
continue;
|
|
|
|
fb_helper_conn = fb_helper->connector_info[i];
|
|
list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
|
|
if (drm_mode_equal(mode, dmt_mode))
|
|
modes[i] = mode;
|
|
}
|
|
if (!modes[i])
|
|
can_clone = false;
|
|
}
|
|
|
|
if (can_clone) {
|
|
DRM_DEBUG_KMS("can clone using 1024x768\n");
|
|
return true;
|
|
}
|
|
DRM_INFO("kms: can't enable cloning when we probably wanted to.\n");
|
|
return false;
|
|
}
|
|
|
|
static bool drm_target_preferred(struct drm_fb_helper *fb_helper,
|
|
struct drm_display_mode **modes,
|
|
bool *enabled, int width, int height)
|
|
{
|
|
struct drm_fb_helper_connector *fb_helper_conn;
|
|
int i;
|
|
|
|
for (i = 0; i < fb_helper->connector_count; i++) {
|
|
fb_helper_conn = fb_helper->connector_info[i];
|
|
|
|
if (enabled[i] == false)
|
|
continue;
|
|
|
|
DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
|
|
fb_helper_conn->connector->base.id);
|
|
|
|
/* got for command line mode first */
|
|
modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
|
|
if (!modes[i]) {
|
|
DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
|
|
fb_helper_conn->connector->base.id);
|
|
modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height);
|
|
}
|
|
/* No preferred modes, pick one off the list */
|
|
if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) {
|
|
list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head)
|
|
break;
|
|
}
|
|
DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
|
|
"none");
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
|
|
struct drm_fb_helper_crtc **best_crtcs,
|
|
struct drm_display_mode **modes,
|
|
int n, int width, int height)
|
|
{
|
|
int c, o;
|
|
struct drm_device *dev = fb_helper->dev;
|
|
struct drm_connector *connector;
|
|
struct drm_connector_helper_funcs *connector_funcs;
|
|
struct drm_encoder *encoder;
|
|
struct drm_fb_helper_crtc *best_crtc;
|
|
int my_score, best_score, score;
|
|
struct drm_fb_helper_crtc **crtcs, *crtc;
|
|
struct drm_fb_helper_connector *fb_helper_conn;
|
|
|
|
if (n == fb_helper->connector_count)
|
|
return 0;
|
|
|
|
fb_helper_conn = fb_helper->connector_info[n];
|
|
connector = fb_helper_conn->connector;
|
|
|
|
best_crtcs[n] = NULL;
|
|
best_crtc = NULL;
|
|
best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height);
|
|
if (modes[n] == NULL)
|
|
return best_score;
|
|
|
|
crtcs = kzalloc(dev->mode_config.num_connector *
|
|
sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
|
|
if (!crtcs)
|
|
return best_score;
|
|
|
|
my_score = 1;
|
|
if (connector->status == connector_status_connected)
|
|
my_score++;
|
|
if (drm_has_cmdline_mode(fb_helper_conn))
|
|
my_score++;
|
|
if (drm_has_preferred_mode(fb_helper_conn, width, height))
|
|
my_score++;
|
|
|
|
connector_funcs = connector->helper_private;
|
|
encoder = connector_funcs->best_encoder(connector);
|
|
if (!encoder)
|
|
goto out;
|
|
|
|
/* select a crtc for this connector and then attempt to configure
|
|
remaining connectors */
|
|
for (c = 0; c < fb_helper->crtc_count; c++) {
|
|
crtc = &fb_helper->crtc_info[c];
|
|
|
|
if ((encoder->possible_crtcs & (1 << c)) == 0) {
|
|
continue;
|
|
}
|
|
|
|
for (o = 0; o < n; o++)
|
|
if (best_crtcs[o] == crtc)
|
|
break;
|
|
|
|
if (o < n) {
|
|
/* ignore cloning unless only a single crtc */
|
|
if (fb_helper->crtc_count > 1)
|
|
continue;
|
|
|
|
if (!drm_mode_equal(modes[o], modes[n]))
|
|
continue;
|
|
}
|
|
|
|
crtcs[n] = crtc;
|
|
memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *));
|
|
score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1,
|
|
width, height);
|
|
if (score > best_score) {
|
|
best_crtc = crtc;
|
|
best_score = score;
|
|
memcpy(best_crtcs, crtcs,
|
|
dev->mode_config.num_connector *
|
|
sizeof(struct drm_fb_helper_crtc *));
|
|
}
|
|
}
|
|
out:
|
|
kfree(crtcs);
|
|
return best_score;
|
|
}
|
|
|
|
static void drm_setup_crtcs(struct drm_fb_helper *fb_helper)
|
|
{
|
|
struct drm_device *dev = fb_helper->dev;
|
|
struct drm_fb_helper_crtc **crtcs;
|
|
struct drm_display_mode **modes;
|
|
struct drm_encoder *encoder;
|
|
struct drm_mode_set *modeset;
|
|
bool *enabled;
|
|
int width, height;
|
|
int i, ret;
|
|
|
|
DRM_DEBUG_KMS("\n");
|
|
|
|
width = dev->mode_config.max_width;
|
|
height = dev->mode_config.max_height;
|
|
|
|
/* clean out all the encoder/crtc combos */
|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
|
|
encoder->crtc = NULL;
|
|
}
|
|
|
|
crtcs = kcalloc(dev->mode_config.num_connector,
|
|
sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
|
|
modes = kcalloc(dev->mode_config.num_connector,
|
|
sizeof(struct drm_display_mode *), GFP_KERNEL);
|
|
enabled = kcalloc(dev->mode_config.num_connector,
|
|
sizeof(bool), GFP_KERNEL);
|
|
|
|
drm_enable_connectors(fb_helper, enabled);
|
|
|
|
ret = drm_target_cloned(fb_helper, modes, enabled, width, height);
|
|
if (!ret) {
|
|
ret = drm_target_preferred(fb_helper, modes, enabled, width, height);
|
|
if (!ret)
|
|
DRM_ERROR("Unable to find initial modes\n");
|
|
}
|
|
|
|
DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height);
|
|
|
|
drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height);
|
|
|
|
/* need to set the modesets up here for use later */
|
|
/* fill out the connector<->crtc mappings into the modesets */
|
|
for (i = 0; i < fb_helper->crtc_count; i++) {
|
|
modeset = &fb_helper->crtc_info[i].mode_set;
|
|
modeset->num_connectors = 0;
|
|
}
|
|
|
|
for (i = 0; i < fb_helper->connector_count; i++) {
|
|
struct drm_display_mode *mode = modes[i];
|
|
struct drm_fb_helper_crtc *fb_crtc = crtcs[i];
|
|
modeset = &fb_crtc->mode_set;
|
|
|
|
if (mode && fb_crtc) {
|
|
DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
|
|
mode->name, fb_crtc->mode_set.crtc->base.id);
|
|
fb_crtc->desired_mode = mode;
|
|
if (modeset->mode)
|
|
drm_mode_destroy(dev, modeset->mode);
|
|
modeset->mode = drm_mode_duplicate(dev,
|
|
fb_crtc->desired_mode);
|
|
modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector;
|
|
}
|
|
}
|
|
|
|
kfree(crtcs);
|
|
kfree(modes);
|
|
kfree(enabled);
|
|
}
|
|
|
|
/**
|
|
* drm_helper_initial_config - setup a sane initial connector configuration
|
|
* @dev: DRM device
|
|
*
|
|
* LOCKING:
|
|
* Called at init time, must take mode config lock.
|
|
*
|
|
* Scan the CRTCs and connectors and try to put together an initial setup.
|
|
* At the moment, this is a cloned configuration across all heads with
|
|
* a new framebuffer object as the backing store.
|
|
*
|
|
* RETURNS:
|
|
* Zero if everything went ok, nonzero otherwise.
|
|
*/
|
|
bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel)
|
|
{
|
|
struct drm_device *dev = fb_helper->dev;
|
|
int count = 0;
|
|
|
|
/* disable all the possible outputs/crtcs before entering KMS mode */
|
|
drm_helper_disable_unused_functions(fb_helper->dev);
|
|
|
|
drm_fb_helper_parse_command_line(fb_helper);
|
|
|
|
count = drm_fb_helper_probe_connector_modes(fb_helper,
|
|
dev->mode_config.max_width,
|
|
dev->mode_config.max_height);
|
|
/*
|
|
* we shouldn't end up with no modes here.
|
|
*/
|
|
if (count == 0) {
|
|
printk(KERN_INFO "No connectors reported connected with modes\n");
|
|
}
|
|
drm_setup_crtcs(fb_helper);
|
|
|
|
return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_initial_config);
|
|
|
|
/**
|
|
* drm_fb_helper_hotplug_event - respond to a hotplug notification by
|
|
* probing all the outputs attached to the fb.
|
|
* @fb_helper: the drm_fb_helper
|
|
*
|
|
* LOCKING:
|
|
* Called at runtime, must take mode config lock.
|
|
*
|
|
* Scan the connectors attached to the fb_helper and try to put together a
|
|
* setup after *notification of a change in output configuration.
|
|
*
|
|
* RETURNS:
|
|
* 0 on success and a non-zero error code otherwise.
|
|
*/
|
|
int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
|
|
{
|
|
struct drm_device *dev = fb_helper->dev;
|
|
int count = 0;
|
|
u32 max_width, max_height, bpp_sel;
|
|
bool bound = false, crtcs_bound = false;
|
|
struct drm_crtc *crtc;
|
|
|
|
if (!fb_helper->fb)
|
|
return 0;
|
|
|
|
mutex_lock(&dev->mode_config.mutex);
|
|
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
|
|
if (crtc->fb)
|
|
crtcs_bound = true;
|
|
if (crtc->fb == fb_helper->fb)
|
|
bound = true;
|
|
}
|
|
|
|
if (!bound && crtcs_bound) {
|
|
fb_helper->delayed_hotplug = true;
|
|
mutex_unlock(&dev->mode_config.mutex);
|
|
return 0;
|
|
}
|
|
DRM_DEBUG_KMS("\n");
|
|
|
|
max_width = fb_helper->fb->width;
|
|
max_height = fb_helper->fb->height;
|
|
bpp_sel = fb_helper->fb->bits_per_pixel;
|
|
|
|
count = drm_fb_helper_probe_connector_modes(fb_helper, max_width,
|
|
max_height);
|
|
drm_setup_crtcs(fb_helper);
|
|
mutex_unlock(&dev->mode_config.mutex);
|
|
|
|
return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
|
|
}
|
|
EXPORT_SYMBOL(drm_fb_helper_hotplug_event);
|
|
|
|
/* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT)
|
|
* but the module doesn't depend on any fb console symbols. At least
|
|
* attempt to load fbcon to avoid leaving the system without a usable console.
|
|
*/
|
|
#if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT)
|
|
static int __init drm_fb_helper_modinit(void)
|
|
{
|
|
const char *name = "fbcon";
|
|
struct module *fbcon;
|
|
|
|
mutex_lock(&module_mutex);
|
|
fbcon = find_module(name);
|
|
mutex_unlock(&module_mutex);
|
|
|
|
if (!fbcon)
|
|
request_module_nowait(name);
|
|
return 0;
|
|
}
|
|
|
|
module_init(drm_fb_helper_modinit);
|
|
#endif
|