From 1d42bbc8f7f9ce4d852692ef7aa336b133b0830a Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Fri, 7 May 2010 05:02:30 +0000 Subject: [PATCH] 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: Dave Airlie --- drivers/gpu/drm/drm_edid.c | 17 ++++---- drivers/gpu/drm/drm_fb_helper.c | 90 ++++++++++++++++++++++++++++++++++++++--- include/drm/drm_crtc.h | 2 + 3 files changed, 96 insertions(+), 13 deletions(-) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 0acb83a..dfd4f36 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -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++; diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index f7b8fca..b3779d2 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -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); diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 2e4bf92..93a1a31 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -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__ */ -- 1.8.2.3