提交 1d42bbc8 编写于 作者: D Dave Airlie

drm/fbdev: fix cloning on fbcon

Simple cloning rules compared to server:
(a) single crtc
(b) > 1 connector active
(c) check command line mode
(d) try and find 1024x768 DMT mode if no command line.
(e) fail to clone
Signed-off-by: NDave Airlie <airlied@redhat.com>
上级 eb1f8e4f
......@@ -658,8 +658,8 @@ static struct drm_display_mode drm_dmt_modes[] = {
static const int drm_num_dmt_modes =
sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
static struct drm_display_mode *drm_find_dmt(struct drm_device *dev,
int hsize, int vsize, int fresh)
struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
int hsize, int vsize, int fresh)
{
int i;
struct drm_display_mode *ptr, *mode;
......@@ -677,6 +677,7 @@ static struct drm_display_mode *drm_find_dmt(struct drm_device *dev,
}
return mode;
}
EXPORT_SYMBOL(drm_mode_find_dmt);
typedef void detailed_cb(struct detailed_timing *timing, void *closure);
......@@ -866,7 +867,7 @@ drm_mode_std(struct drm_connector *connector, struct edid *edid,
}
/* check whether it can be found in default mode table */
mode = drm_find_dmt(dev, hsize, vsize, vrefresh_rate);
mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate);
if (mode)
return mode;
......@@ -1386,11 +1387,11 @@ drm_est3_modes(struct drm_connector *connector, struct detailed_timing *timing)
if (m >= num_est3_modes)
break;
if (est[i] & (1 << j)) {
mode = drm_find_dmt(connector->dev,
est3_modes[m].w,
est3_modes[m].h,
est3_modes[m].r
/*, est3_modes[m].rb */);
mode = drm_mode_find_dmt(connector->dev,
est3_modes[m].w,
est3_modes[m].h,
est3_modes[m].r
/*, est3_modes[m].rb */);
if (mode) {
drm_mode_probed_add(connector, mode);
modes++;
......
......@@ -1070,6 +1070,79 @@ static void drm_enable_connectors(struct drm_fb_helper *fb_helper,
}
}
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)
......@@ -1163,8 +1236,12 @@ static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
break;
if (o < n) {
/* ignore cloning for now */
continue;
/* 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;
......@@ -1214,9 +1291,12 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper)
drm_enable_connectors(fb_helper, enabled);
ret = drm_target_preferred(fb_helper, modes, enabled, width, height);
if (!ret)
DRM_ERROR("Unable to find initial modes\n");
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);
......
......@@ -804,4 +804,6 @@ extern int drm_add_modes_noedid(struct drm_connector *connector,
int hdisplay, int vdisplay);
extern bool drm_edid_is_valid(struct edid *edid);
struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
int hsize, int vsize, int fresh);
#endif /* __DRM_CRTC_H__ */
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