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kms: add public API to override the default configuration of outputs

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Add API to allow complex applications using the KMS backend
to go almost straight to direct configuration (which is not possible
because Cogl needs to be in charge of buffers and FB objects).

https://bugzilla.gnome.org/show_bug.cgi?id=705837

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 52fb8e1c33d8c83c731c05cee767928fdd5991d7)
This commit is contained in:
Giovanni Campagna 2013-07-30 17:20:01 +02:00 committed by Robert Bragg
parent 5fe0d81bea
commit bd3dce4af1
2 changed files with 238 additions and 33 deletions
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39
cogl/cogl-kms-display.h
View File

@ -32,6 +32,8 @@
#include <cogl/cogl-types.h>
#include <cogl/cogl-display.h>
#include <xf86drmMode.h>
COGL_BEGIN_DECLS
/**
@ -54,5 +56,42 @@ COGL_BEGIN_DECLS
void
cogl_kms_display_queue_modes_reset (CoglDisplay *display);
typedef struct {
uint32_t id;
uint32_t x, y;
drmModeModeInfo mode;
uint32_t *connectors;
uint32_t count;
} CoglKmsCrtc;
/**
* cogl_kms_display_set_layout:
* @onscreen: a #CoglDisplay
* @width: the framebuffer width
* @height: the framebuffer height
* @crtcs: the array of #CoglKmsCrtc structure with the desired CRTC layout
*
* Configures @display to use a framebuffer sized @width x @height, covering
* the CRTCS in @crtcs.
* @width and @height must be within the driver framebuffer limits, and @crtcs
* must be valid KMS API IDs.
*
* Calling this function overrides the automatic mode setting done by Cogl,
* and for this reason must be called before the first call to cogl_onscreen_swap_buffers().
*
* If you want to restore the default behaviour, you can call this function
* with @width and @height set to -1.
*
* Stability: unstable
*/
CoglBool
cogl_kms_display_set_layout (CoglDisplay *display,
int width,
int height,
CoglKmsCrtc **crtcs,
int n_crtcs,
CoglError **error);
COGL_END_DECLS
#endif /* __COGL_KMS_DISPLAY_H__ */

216
cogl/winsys/cogl-winsys-egl-kms.c
View File

@ -79,9 +79,13 @@ typedef struct _CoglOutputKMS
typedef struct _CoglDisplayKMS
{
GList *outputs;
GList *crtcs;
int width, height;
CoglBool pending_set_crtc;
struct gbm_surface *dummy_gbm_surface;
CoglOnscreen *onscreen;
} CoglDisplayKMS;
typedef struct _CoglFlipKMS
@ -520,19 +524,71 @@ setup_crtc_modes (CoglDisplay *display, int fb_id)
CoglRendererKMS *kms_renderer = egl_renderer->platform;
GList *l;
for (l = kms_display->outputs; l; l = l->next)
for (l = kms_display->crtcs; l; l = l->next)
{
CoglOutputKMS *output = l->data;
CoglKmsCrtc *crtc = l->data;
int ret = drmModeSetCrtc (kms_renderer->fd,
output->encoder->crtc_id,
fb_id, 0, 0,
&output->connector->connector_id, 1,
&output->mode);
crtc->id,
fb_id, crtc->x, crtc->y,
crtc->connectors, crtc->count,
crtc->count ? &crtc->mode : NULL);
if (ret)
g_warning ("Failed to set crtc mode %s: %m", output->mode.name);
g_warning ("Failed to set crtc mode %s: %m", crtc->mode.name);
}
}
static void
flip_all_crtcs (CoglDisplay *display, CoglFlipKMS *flip, int fb_id)
{
CoglDisplayEGL *egl_display = display->winsys;
CoglDisplayKMS *kms_display = egl_display->platform;
CoglRendererEGL *egl_renderer = display->renderer->winsys;
CoglRendererKMS *kms_renderer = egl_renderer->platform;
GList *l;
for (l = kms_display->crtcs; l; l = l->next)
{
CoglKmsCrtc *crtc = l->data;
int ret;
if (crtc->count == 0)
continue;
ret = drmModePageFlip (kms_renderer->fd,
crtc->id, fb_id,
DRM_MODE_PAGE_FLIP_EVENT, flip);
if (ret)
{
g_warning ("Failed to flip: %m");
continue;
}
flip->pending++;
}
}
static void
crtc_free (CoglKmsCrtc *crtc)
{
g_free (crtc->connectors);
g_slice_free (CoglKmsCrtc, crtc);
}
static CoglKmsCrtc *
crtc_copy (CoglKmsCrtc *from)
{
CoglKmsCrtc *new;
new = g_slice_new (CoglKmsCrtc);
*new = *from;
new->connectors = g_memdup (from->connectors, from->count * sizeof(uint32_t));
return new;
}
static CoglBool
_cogl_winsys_egl_display_setup (CoglDisplay *display,
CoglError **error)
@ -544,6 +600,7 @@ _cogl_winsys_egl_display_setup (CoglDisplay *display,
drmModeRes *resources;
CoglOutputKMS *output0, *output1;
CoglBool mirror;
CoglKmsCrtc *crtc0, *crtc1;
kms_display = g_slice_new0 (CoglDisplayKMS);
egl_display->platform = kms_display;
@ -598,7 +655,33 @@ _cogl_winsys_egl_display_setup (CoglDisplay *display,
}
}
else
{
output0->mode = output0->modes[0];
output1 = NULL;
}
crtc0 = g_slice_new (CoglKmsCrtc);
crtc0->id = output0->encoder->crtc_id;
crtc0->x = 0;
crtc0->y = 0;
crtc0->mode = output0->mode;
crtc0->connectors = g_new (uint32_t, 1);
crtc0->connectors[0] = output0->connector->connector_id;
crtc0->count = 1;
kms_display->crtcs = g_list_prepend (kms_display->crtcs, crtc0);
if (output1)
{
crtc1 = g_slice_new (CoglKmsCrtc);
crtc1->id = output1->encoder->crtc_id;
crtc1->x = 0;
crtc1->y = 0;
crtc1->mode = output1->mode;
crtc1->connectors = g_new (uint32_t, 1);
crtc1->connectors[0] = output1->connector->connector_id;
crtc1->count = 1;
kms_display->crtcs = g_list_prepend (kms_display->crtcs, crtc1);
}
kms_display->width = output0->mode.hdisplay;
kms_display->height = output0->mode.vdisplay;
@ -654,6 +737,8 @@ _cogl_winsys_egl_display_destroy (CoglDisplay *display)
g_list_free (kms_display->outputs);
kms_display->outputs = NULL;
g_list_free_full (kms_display->crtcs, (GDestroyNotify) crtc_free);
g_slice_free (CoglDisplayKMS, egl_display->platform);
}
@ -742,7 +827,6 @@ _cogl_winsys_onscreen_swap_buffers_with_damage (CoglOnscreen *onscreen,
CoglOnscreenKMS *kms_onscreen = egl_onscreen->platform;
uint32_t handle, stride;
CoglFlipKMS *flip;
GList *l;
/* If we already have a pending swap then block until it completes */
while (kms_onscreen->next_fb_id != 0)
@ -781,7 +865,7 @@ _cogl_winsys_onscreen_swap_buffers_with_damage (CoglOnscreen *onscreen,
}
/* If this is the first framebuffer to be presented then we now setup the
* crtc modes... */
* crtc modes, else we flip from the previous buffer */
if (kms_display->pending_set_crtc)
{
setup_crtc_modes (context->display, kms_onscreen->next_fb_id);
@ -791,22 +875,7 @@ _cogl_winsys_onscreen_swap_buffers_with_damage (CoglOnscreen *onscreen,
flip = g_slice_new0 (CoglFlipKMS);
flip->onscreen = onscreen;
for (l = kms_display->outputs; l; l = l->next)
{
CoglOutputKMS *output = l->data;
if (drmModePageFlip (kms_renderer->fd,
output->encoder->crtc_id,
kms_onscreen->next_fb_id,
DRM_MODE_PAGE_FLIP_EVENT,
flip))
{
g_warning ("Failed to flip: %m");
continue;
}
flip->pending++;
}
flip_all_crtcs (context->display, flip, kms_onscreen->next_fb_id);
if (flip->pending == 0)
{
@ -859,6 +928,16 @@ _cogl_winsys_onscreen_init (CoglOnscreen *onscreen,
_COGL_RETURN_VAL_IF_FAIL (egl_display->egl_context, FALSE);
if (kms_display->onscreen)
{
_cogl_set_error (error, COGL_WINSYS_ERROR,
COGL_WINSYS_ERROR_CREATE_ONSCREEN,
"Cannot have multiple onscreens in the KMS platform");
return FALSE;
}
kms_display->onscreen = onscreen;
onscreen->winsys = g_slice_new0 (CoglOnscreenEGL);
egl_onscreen = onscreen->winsys;
@ -906,6 +985,9 @@ _cogl_winsys_onscreen_deinit (CoglOnscreen *onscreen)
{
CoglFramebuffer *framebuffer = COGL_FRAMEBUFFER (onscreen);
CoglContext *context = framebuffer->context;
CoglDisplay *display = context->display;
CoglDisplayEGL *egl_display = display->winsys;
CoglDisplayKMS *kms_display = egl_display->platform;
CoglRenderer *renderer = context->display->renderer;
CoglRendererEGL *egl_renderer = renderer->winsys;
CoglOnscreenEGL *egl_onscreen = onscreen->winsys;
@ -915,6 +997,8 @@ _cogl_winsys_onscreen_deinit (CoglOnscreen *onscreen)
if (egl_onscreen == NULL)
return;
kms_display->onscreen = NULL;
kms_onscreen = egl_onscreen->platform;
/* flip state takes a reference on the onscreen so there should
@ -1009,3 +1093,85 @@ cogl_kms_display_queue_modes_reset (CoglDisplay *display)
kms_display->pending_set_crtc = TRUE;
}
}
CoglBool
cogl_kms_display_set_layout (CoglDisplay *display,
int width,
int height,
CoglKmsCrtc **crtcs,
int n_crtcs,
CoglError **error)
{
CoglDisplayEGL *egl_display = display->winsys;
CoglDisplayKMS *kms_display = egl_display->platform;
CoglRenderer *renderer = display->renderer;
CoglRendererEGL *egl_renderer = renderer->winsys;
CoglRendererKMS *kms_renderer = egl_renderer->platform;
GList *crtc_list;
int i;
if ((width != kms_display->width ||
height != kms_display->height) &&
kms_display->onscreen)
{
CoglOnscreenEGL *egl_onscreen = kms_display->onscreen->winsys;
CoglOnscreenKMS *kms_onscreen = egl_onscreen->platform;
struct gbm_surface *new_surface;
EGLSurface new_egl_surface;
/* Need to drop the GBM surface and create a new one */
new_surface = gbm_surface_create (kms_renderer->gbm,
width, height,
GBM_BO_FORMAT_XRGB8888,
GBM_BO_USE_SCANOUT |
GBM_BO_USE_RENDERING);
if (!new_surface)
{
_cogl_set_error (error, COGL_WINSYS_ERROR,
COGL_WINSYS_ERROR_CREATE_ONSCREEN,
"Failed to allocate new surface");
return FALSE;
}
new_egl_surface =
eglCreateWindowSurface (egl_renderer->edpy,
egl_display->egl_config,
(NativeWindowType) new_surface,
NULL);
if (new_egl_surface == EGL_NO_SURFACE)
{
_cogl_set_error (error, COGL_WINSYS_ERROR,
COGL_WINSYS_ERROR_CREATE_ONSCREEN,
"Failed to allocate new surface");
gbm_surface_destroy (new_surface);
return FALSE;
}
eglDestroySurface (egl_renderer->edpy, egl_onscreen->egl_surface);
gbm_surface_destroy (kms_onscreen->surface);
kms_onscreen->surface = new_surface;
egl_onscreen->egl_surface = new_egl_surface;
_cogl_framebuffer_winsys_update_size (COGL_FRAMEBUFFER (kms_display->onscreen), width, height);
}
kms_display->width = width;
kms_display->height = height;
g_list_free_full (kms_display->crtcs, (GDestroyNotify) crtc_free);
crtc_list = NULL;
for (i = 0; i < n_crtcs; i++)
{
crtc_list = g_list_prepend (crtc_list, crtc_copy (crtcs[i]));
}
crtc_list = g_list_reverse (crtc_list);
kms_display->crtcs = crtc_list;
kms_display->pending_set_crtc = TRUE;
return TRUE;
}