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authorAlex Deucher <alexdeucher@gmail.com>2009-12-22 10:06:49 -0500
committerDave Airlie <airlied@redhat.com>2009-12-23 11:14:04 +1000
commitd2efdf6d6f425950a61fa5cc3aa22e6718e7f3c8 (patch)
tree6a0462a3634ae7d3324c807a7a59ca449f83d5a6 /drivers/gpu
parent512889f450c1851d9e3628f1894b9b64b0701eac (diff)
drm/radeon/kms: add cvt mode if we only have lvds w/h and no edid (v4)
This fixes LVDS on some mac laptops without a panel edid. v2 - Set proper mode type flags v3 - Note that this is not neceesarily the exact panel mode, but an approximation based on the cvt formula. For these systems we should ideally read the mode info out of the registers or add a mode table, but this works and is much simpler. v4 - Update comments and debug message. Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/radeon/radeon_connectors.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
index 8da06e17ff2..20161567dbf 100644
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -208,6 +208,18 @@ static struct drm_display_mode *radeon_fp_native_mode(struct drm_encoder *encode
drm_mode_set_name(mode);
DRM_DEBUG("Adding native panel mode %s\n", mode->name);
+ } else if (native_mode->hdisplay != 0 &&
+ native_mode->vdisplay != 0) {
+ /* mac laptops without an edid */
+ /* Note that this is not necessarily the exact panel mode,
+ * but an approximation based on the cvt formula. For these
+ * systems we should ideally read the mode info out of the
+ * registers or add a mode table, but this works and is much
+ * simpler.
+ */
+ mode = drm_cvt_mode(dev, native_mode->hdisplay, native_mode->vdisplay, 60, true, false, false);
+ mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
+ DRM_DEBUG("Adding cvt approximation of native panel mode %s\n", mode->name);
}
return mode;
}