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drm/i915: extract modeset config save/restore code

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At the end this won't be of much use to us, but meanwhile just extract
it to get a better overview of what exactly set_config does.

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2012-07-04 22:24:08 +02:00
parent d9e55608cd
commit 85f9eb71fe
1 changed files with 76 additions and 51 deletions
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127
drivers/gpu/drm/i915/intel_display.c
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@ -6734,11 +6734,82 @@ static void intel_set_config_free(struct intel_set_config *config)
kfree(config);
}
static int intel_set_config_save_state(struct drm_device *dev,
struct intel_set_config *config)
{
struct drm_crtc *crtc;
struct drm_encoder *encoder;
struct drm_connector *connector;
int count;
/* Allocate space for the backup of all (non-pointer) crtc, encoder and
* connector data. */
config->save_crtcs = kzalloc(dev->mode_config.num_crtc *
sizeof(struct drm_crtc), GFP_KERNEL);
if (!config->save_crtcs)
return -ENOMEM;
config->save_encoders = kzalloc(dev->mode_config.num_encoder *
sizeof(struct drm_encoder), GFP_KERNEL);
if (!config->save_encoders)
return -ENOMEM;
config->save_connectors = kzalloc(dev->mode_config.num_connector *
sizeof(struct drm_connector), GFP_KERNEL);
if (!config->save_connectors)
return -ENOMEM;
/* Copy data. Note that driver private data is not affected.
* Should anything bad happen only the expected state is
* restored, not the drivers personal bookkeeping.
*/
count = 0;
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
config->save_crtcs[count++] = *crtc;
}
count = 0;
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
config->save_encoders[count++] = *encoder;
}
count = 0;
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
config->save_connectors[count++] = *connector;
}
return 0;
}
static void intel_set_config_restore_state(struct drm_device *dev,
struct intel_set_config *config)
{
struct drm_crtc *crtc;
struct drm_encoder *encoder;
struct drm_connector *connector;
int count;
count = 0;
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
*crtc = config->save_crtcs[count++];
}
count = 0;
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
*encoder = config->save_encoders[count++];
}
count = 0;
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
*connector = config->save_connectors[count++];
}
}
static int intel_crtc_set_config(struct drm_mode_set *set)
{
struct drm_device *dev;
struct drm_crtc *new_crtc, *crtc;
struct drm_encoder *new_encoder, *encoder;
struct drm_crtc *new_crtc;
struct drm_encoder *new_encoder;
struct drm_framebuffer *old_fb = NULL;
bool mode_changed = false; /* if true do a full mode set */
bool fb_changed = false; /* if true and !mode_changed just do a flip */
@ -6779,42 +6850,10 @@ static int intel_crtc_set_config(struct drm_mode_set *set)
if (!config)
goto out_config;
/* Allocate space for the backup of all (non-pointer) crtc, encoder and
* connector data. */
config->save_crtcs = kzalloc(dev->mode_config.num_crtc *
sizeof(struct drm_crtc), GFP_KERNEL);
if (!config->save_crtcs)
ret = intel_set_config_save_state(dev, config);
if (ret)
goto out_config;
config->save_encoders = kzalloc(dev->mode_config.num_encoder *
sizeof(struct drm_encoder), GFP_KERNEL);
if (!config->save_encoders)
goto out_config;
config->save_connectors = kzalloc(dev->mode_config.num_connector *
sizeof(struct drm_connector), GFP_KERNEL);
if (!config->save_connectors)
goto out_config;
/* Copy data. Note that driver private data is not affected.
* Should anything bad happen only the expected state is
* restored, not the drivers personal bookkeeping.
*/
count = 0;
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
config->save_crtcs[count++] = *crtc;
}
count = 0;
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
config->save_encoders[count++] = *encoder;
}
count = 0;
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
config->save_connectors[count++] = *connector;
}
save_set.crtc = set->crtc;
save_set.mode = &set->crtc->mode;
save_set.x = set->crtc->x;
@ -6953,21 +6992,7 @@ static int intel_crtc_set_config(struct drm_mode_set *set)
return 0;
fail:
/* Restore all previous data. */
count = 0;
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
*crtc = config->save_crtcs[count++];
}
count = 0;
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
*encoder = config->save_encoders[count++];
}
count = 0;
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
*connector = config->save_connectors[count++];
}
intel_set_config_restore_state(dev, config);
/* Try to restore the config */
if (mode_changed &&