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drm/fb-helper: Prepare to move out modeset config code 

This prepares the modeset code so it can be moved out as-is in the next
patch.

v3: Remove stray newline

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Reviewed-by: Maxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190608152657.36613-3-noralf@tronnes.org
This commit is contained in:
Noralf Trønnes 2019-06-08 17:26:54 +02:00
parent e5852bee90
commit aafa9e0668
2 changed files with 44 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

62
drivers/gpu/drm/drm_fb_helper.c
View File

@ -48,6 +48,10 @@
#include "drm_internal.h"
struct drm_client_offset {
int x, y;
};
static bool drm_fbdev_emulation = true;
module_param_named(fbdev_emulation, drm_fbdev_emulation, bool, 0600);
MODULE_PARM_DESC(fbdev_emulation,
@ -1809,7 +1813,7 @@ static bool drm_client_target_cloned(struct drm_device *dev,
struct drm_connector **connectors,
unsigned int connector_count,
struct drm_display_mode **modes,
struct drm_fb_offset *offsets,
struct drm_client_offset *offsets,
bool *enabled, int width, int height)
{
int count, i, j;
@ -1888,7 +1892,7 @@ static bool drm_client_target_cloned(struct drm_device *dev,
static int drm_client_get_tile_offsets(struct drm_connector **connectors,
unsigned int connector_count,
struct drm_display_mode **modes,
struct drm_fb_offset *offsets,
struct drm_client_offset *offsets,
int idx,
int h_idx, int v_idx)
{
@ -1921,7 +1925,7 @@ static int drm_client_get_tile_offsets(struct drm_connector **connectors,
static bool drm_client_target_preferred(struct drm_connector **connectors,
unsigned int connector_count,
struct drm_display_mode **modes,
struct drm_fb_offset *offsets,
struct drm_client_offset *offsets,
bool *enabled, int width, int height)
{
const u64 mask = BIT_ULL(connector_count) - 1;
@ -2085,7 +2089,7 @@ static bool drm_client_firmware_config(struct drm_client_dev *client,
unsigned int connector_count,
struct drm_crtc **crtcs,
struct drm_display_mode **modes,
struct drm_fb_offset *offsets,
struct drm_client_offset *offsets,
bool *enabled, int width, int height)
{
unsigned int count = min_t(unsigned int, connector_count, BITS_PER_LONG);
@ -2255,30 +2259,47 @@ bail:
return ret;
}
static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
u32 width, u32 height)
/**
* drm_client_modeset_probe() - Probe for displays
* @client: DRM client
* @width: Maximum display mode width (optional)
* @height: Maximum display mode height (optional)
*
* This function sets up display pipelines for enabled connectors and stores the
* config in the client's modeset array.
*
* Returns:
* Zero on success or negative error code on failure.
*/
int drm_client_modeset_probe(struct drm_client_dev *client, unsigned int width, unsigned int height)
{
struct drm_connector *connector, **connectors = NULL;
struct drm_client_dev *client = &fb_helper->client;
struct drm_connector_list_iter conn_iter;
struct drm_device *dev = fb_helper->dev;
struct drm_device *dev = client->dev;
unsigned int total_modes_count = 0;
struct drm_client_offset *offsets;
unsigned int connector_count = 0;
struct drm_display_mode **modes;
struct drm_fb_offset *offsets;
struct drm_crtc **crtcs;
int i, ret = 0;
bool *enabled;
int i;
DRM_DEBUG_KMS("\n");
if (!width)
width = dev->mode_config.max_width;
if (!height)
height = dev->mode_config.max_height;
drm_connector_list_iter_begin(dev, &conn_iter);
drm_client_for_each_connector_iter(connector, &conn_iter) {
struct drm_connector **tmp;
tmp = krealloc(connectors, (connector_count + 1) * sizeof(*connectors), GFP_KERNEL);
if (!tmp)
if (!tmp) {
ret = -ENOMEM;
goto free_connectors;
}
connectors = tmp;
drm_connector_get(connector);
@ -2287,7 +2308,7 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
drm_connector_list_iter_end(&conn_iter);
if (!connector_count)
return;
return 0;
crtcs = kcalloc(connector_count, sizeof(*crtcs), GFP_KERNEL);
modes = kcalloc(connector_count, sizeof(*modes), GFP_KERNEL);
@ -2295,12 +2316,13 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
enabled = kcalloc(connector_count, sizeof(bool), GFP_KERNEL);
if (!crtcs || !modes || !enabled || !offsets) {
DRM_ERROR("Memory allocation failed\n");
ret = -ENOMEM;
goto out;
}
mutex_lock(&client->modeset_mutex);
mutex_lock(&fb_helper->dev->mode_config.mutex);
mutex_lock(&dev->mode_config.mutex);
for (i = 0; i < connector_count; i++)
total_modes_count += connectors[i]->funcs->fill_modes(connectors[i], width, height);
if (!total_modes_count)
@ -2325,14 +2347,14 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
drm_client_pick_crtcs(client, connectors, connector_count,
crtcs, modes, 0, width, height);
}
mutex_unlock(&fb_helper->dev->mode_config.mutex);
mutex_unlock(&dev->mode_config.mutex);
drm_client_modeset_release(client);
for (i = 0; i < connector_count; i++) {
struct drm_display_mode *mode = modes[i];
struct drm_crtc *crtc = crtcs[i];
struct drm_fb_offset *offset = &offsets[i];
struct drm_client_offset *offset = &offsets[i];
if (mode && crtc) {
struct drm_mode_set *modeset = drm_client_find_modeset(client, crtc);
@ -2342,8 +2364,10 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
mode->name, crtc->base.id, offset->x, offset->y);
if (WARN_ON_ONCE(modeset->num_connectors == DRM_CLIENT_MAX_CLONED_CONNECTORS ||
(dev->mode_config.num_crtc > 1 && modeset->num_connectors == 1)))
(dev->mode_config.num_crtc > 1 && modeset->num_connectors == 1))) {
ret = -EINVAL;
break;
}
modeset->mode = drm_mode_duplicate(dev, mode);
drm_connector_get(connector);
@ -2363,6 +2387,8 @@ free_connectors:
for (i = 0; i < connector_count; i++)
drm_connector_put(connectors[i]);
kfree(connectors);
return ret;
}
/*
@ -2444,7 +2470,7 @@ __drm_fb_helper_initial_config_and_unlock(struct drm_fb_helper *fb_helper,
width = dev->mode_config.max_width;
height = dev->mode_config.max_height;
drm_setup_crtcs(fb_helper, width, height);
drm_client_modeset_probe(&fb_helper->client, width, height);
ret = drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
if (ret < 0) {
if (ret == -EAGAIN) {
@ -2591,7 +2617,7 @@ int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
DRM_DEBUG_KMS("\n");
drm_setup_crtcs(fb_helper, fb_helper->fb->width, fb_helper->fb->height);
drm_client_modeset_probe(&fb_helper->client, fb_helper->fb->width, fb_helper->fb->height);
drm_setup_crtcs_fb(fb_helper);
mutex_unlock(&fb_helper->lock);

4
include/drm/drm_fb_helper.h
View File

@ -43,10 +43,6 @@ enum mode_set_atomic {
ENTER_ATOMIC_MODE_SET,
};
struct drm_fb_offset {
int x, y;
};
/**
* struct drm_fb_helper_surface_size - describes fbdev size and scanout surface size
* @fb_width: fbdev width