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| author | Patrik Jakobsson <patrik.r.jakobsson@gmail.com> | 2017-04-18 13:43:32 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-07 12:06:01 +0200 |
| commit | 4e4b72c0ee3d549e62d92d4ace69ddccd9a7136b (patch) | |
| tree | 7b5105d94f9ee936b90c9360adc2c336e9db2665 /drivers/gpu | |
| parent | 14bfe118dd7d2ee8a00dcf0b880889922b365563 (diff) | |
| download | linux-stable-4e4b72c0ee3d549e62d92d4ace69ddccd9a7136b.tar.gz linux-stable-4e4b72c0ee3d549e62d92d4ace69ddccd9a7136b.tar.bz2 linux-stable-4e4b72c0ee3d549e62d92d4ace69ddccd9a7136b.zip | |
drm/gma500/psb: Actually use VBT mode when it is found
commit 82bc9a42cf854fdf63155759c0aa790bd1f361b0 upstream.
With LVDS we were incorrectly picking the pre-programmed mode instead of
the prefered mode provided by VBT. Make sure we pick the VBT mode if
one is provided. It is likely that the mode read-out code is still wrong
but this patch fixes the immediate problem on most machines.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78562
Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170418114332.12183-1-patrik.r.jakobsson@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/gma500/psb_intel_lvds.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/drivers/gpu/drm/gma500/psb_intel_lvds.c b/drivers/gpu/drm/gma500/psb_intel_lvds.c index ce0645d0c1e5..61e3a097a478 100644 --- a/drivers/gpu/drm/gma500/psb_intel_lvds.c +++ b/drivers/gpu/drm/gma500/psb_intel_lvds.c @@ -783,20 +783,23 @@ void psb_intel_lvds_init(struct drm_device *dev, if (scan->type & DRM_MODE_TYPE_PREFERRED) { mode_dev->panel_fixed_mode = drm_mode_duplicate(dev, scan); + DRM_DEBUG_KMS("Using mode from DDC\n"); goto out; /* FIXME: check for quirks */ } } /* Failed to get EDID, what about VBT? do we need this? */ - if (mode_dev->vbt_mode) + if (dev_priv->lfp_lvds_vbt_mode) { mode_dev->panel_fixed_mode = - drm_mode_duplicate(dev, mode_dev->vbt_mode); + drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode); - if (!mode_dev->panel_fixed_mode) - if (dev_priv->lfp_lvds_vbt_mode) - mode_dev->panel_fixed_mode = - drm_mode_duplicate(dev, - dev_priv->lfp_lvds_vbt_mode); + if (mode_dev->panel_fixed_mode) { + mode_dev->panel_fixed_mode->type |= + DRM_MODE_TYPE_PREFERRED; + DRM_DEBUG_KMS("Using mode from VBT\n"); + goto out; + } + } /* * If we didn't get EDID, try checking if the panel is already turned @@ -813,6 +816,7 @@ void psb_intel_lvds_init(struct drm_device *dev, if (mode_dev->panel_fixed_mode) { mode_dev->panel_fixed_mode->type |= DRM_MODE_TYPE_PREFERRED; + DRM_DEBUG_KMS("Using pre-programmed mode\n"); goto out; /* FIXME: check for quirks */ } } |