> On Mon, Aug 10, 2015 at 03:26:09PM +0800, Xiong Zhang wrote: > > Only internal eDP, LVDS, DVI screen could set scalling mode, some > > customers need to set scalling mode for external DP, HDMI, VGA screen. > > Let's fulfill this. > > > > bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=90989 > > > > Signed-off-by: Xiong Zhang <xiong.y.zh...@intel.com> > > --- > > drivers/gpu/drm/i915/intel_dp.c | 63 > > ++++++++++++++++++++++++++++------------- > > 1 file changed, 44 insertions(+), 19 deletions(-) > > > > diff --git a/drivers/gpu/drm/i915/intel_dp.c > > b/drivers/gpu/drm/i915/intel_dp.c index f1b9f93..2da334b 100644 > > --- a/drivers/gpu/drm/i915/intel_dp.c > > +++ b/drivers/gpu/drm/i915/intel_dp.c > > @@ -207,7 +207,13 @@ intel_dp_mode_valid(struct drm_connector > *connector, > > int target_clock = mode->clock; > > int max_rate, mode_rate, max_lanes, max_link_clock; > > > > - if (is_edp(intel_dp) && fixed_mode) { > > + if (mode->clock < 10000) > > + return MODE_CLOCK_LOW; > > + > > + if (mode->flags & DRM_MODE_FLAG_DBLCLK) > > + return MODE_H_ILLEGAL; > > + > > + if (!intel_panel_scale_none(&intel_connector->panel)) { > > if (mode->hdisplay > fixed_mode->hdisplay) > > return MODE_PANEL; > > > > @@ -226,12 +232,6 @@ intel_dp_mode_valid(struct drm_connector > *connector, > > if (mode_rate > max_rate) > > return MODE_CLOCK_HIGH; > > > > - if (mode->clock < 10000) > > - return MODE_CLOCK_LOW; > > - > > - if (mode->flags & DRM_MODE_FLAG_DBLCLK) > > - return MODE_H_ILLEGAL; > > - > > return MODE_OK; > > } > > > > @@ -1378,7 +1378,7 @@ intel_dp_compute_config(struct intel_encoder > *encoder, > > pipe_config->has_drrs = false; > > pipe_config->has_audio = intel_dp->has_audio && port != PORT_A; > > > > - if (is_edp(intel_dp) && intel_connector->panel.fixed_mode) { > > + if (!intel_panel_scale_none(&intel_connector->panel)) { > > intel_fixed_panel_mode(intel_connector->panel.fixed_mode, > > adjusted_mode); > > > > @@ -4592,6 +4592,23 @@ static int intel_dp_get_modes(struct > drm_connector *connector) > > edid = intel_connector->detect_edid; > > if (edid) { > > int ret = intel_connector_update_modes(connector, edid); > > + > > + if (ret && intel_connector->panel.fixed_mode == NULL) { > > + /* init fixed mode as preferred mode for DP */ > > + struct drm_display_mode *fixed_mode = NULL; > > + struct drm_display_mode *scan; > > + > > + list_for_each_entry(scan, &connector->probed_modes, > > head) { > > + if (scan->type & DRM_MODE_TYPE_PREFERRED) > > + fixed_mode = > > drm_mode_duplicate(connector->dev, > > + scan); > > + } > > + > > + if (fixed_mode) > > + intel_panel_init(&intel_connector->panel, > > + fixed_mode, NULL); > > + } > > How are we supposed to get rid of a stale fixed_mode when some other > display gets plugged in? [Zhang, Xiong Y] Thanks so much for your good question. Yes, we should clear the stale fitting_mode and fixed_mode when display is disconnect in intel_dp_hpd_pulse() function. > > Also what would happen if the preferred mode can't be supported due to some > source limitation? [Zhang, Xiong Y] In this case, which mode should be selected as fixed_mode ? As you said maybe kernel isn't the right place to do such decision. > > In general I'm not entirely happy with having this kind of policy in the > kernel. > I'd much prefer if we could get crtc size and border properties done so that > userspace could set up the scaling any which way it chooses. [Zhang, Xiong Y] Could you give more detail about your preference ?
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