[PATCH 03/14] drm/gma500: Sanitize possible_clones

Ville Syrjala
2018-06-15T16:49:14Z

I double the DP+DP and SDVO+SDVO cloning works for this driver.
i915 at least doesn't do those. Truthfully there could be some very specific
circumstances where some of them would do doable, but genereally it's
too much pain to deal with so we've chose not to bother. Let's use the
same approach for gma500.

Also the LVDS+LVDS and DSI+DSI cases probably don't really exist as
there is one of each at most.

This does mean we'll now leave possible_clones at 0 for these encoder
types whereas previosuly we included the encoder itself in the bitmask.
But that's fine as the core now treaks 0 as a special case and adds
the encoder itself into the final bitmask reported to userspace.

Cc: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
drivers/gpu/drm/gma500/framebuffer.c | 16 ++++++++--------
drivers/gpu/drm/gma500/mdfld_dsi_dpi.c | 4 ++--
2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c
index 8fa4ef192c1e..4072dc3dfe23 100644
--- a/drivers/gpu/drm/gma500/framebuffer.c
+++ b/drivers/gpu/drm/gma500/framebuffer.c
@@ -606,31 +606,31 @@ static void psb_setup_outputs(struct drm_device *dev)
break;
case INTEL_OUTPUT_SDVO:
crtc_mask = dev_priv->ops->sdvo_mask;
- clone_mask = (1 << INTEL_OUTPUT_SDVO);
+ clone_mask = 0;
break;
case INTEL_OUTPUT_LVDS:
- crtc_mask = dev_priv->ops->lvds_mask;
- clone_mask = (1 << INTEL_OUTPUT_LVDS);
+ crtc_mask = dev_priv->ops->lvds_mask;
+ clone_mask = 0;
break;
case INTEL_OUTPUT_MIPI:
crtc_mask = (1 << 0);
- clone_mask = (1 << INTEL_OUTPUT_MIPI);
+ clone_mask = 0;
break;
case INTEL_OUTPUT_MIPI2:
crtc_mask = (1 << 2);
- clone_mask = (1 << INTEL_OUTPUT_MIPI2);
+ clone_mask = 0;
break;
case INTEL_OUTPUT_HDMI:
- crtc_mask = dev_priv->ops->hdmi_mask;
+ crtc_mask = dev_priv->ops->hdmi_mask;
clone_mask = (1 << INTEL_OUTPUT_HDMI);
break;
case INTEL_OUTPUT_DISPLAYPORT:
crtc_mask = (1 << 0) | (1 << 1);
- clone_mask = (1 << INTEL_OUTPUT_DISPLAYPORT);
+ clone_mask = 0;
break;
case INTEL_OUTPUT_EDP:
crtc_mask = (1 << 1);
- clone_mask = (1 << INTEL_OUTPUT_EDP);
+ clone_mask = 0;
}
encoder->possible_crtcs = crtc_mask;
encoder->possible_clones =
diff --git a/drivers/gpu/drm/gma500/mdfld_dsi_dpi.c b/drivers/gpu/drm/gma500/mdfld_dsi_dpi.c
index a05c020602bd..94e362da3384 100644
--- a/drivers/gpu/drm/gma500/mdfld_dsi_dpi.c
+++ b/drivers/gpu/drm/gma500/mdfld_dsi_dpi.c
@@ -1004,10 +1004,10 @@ struct mdfld_dsi_encoder *mdfld_dsi_dpi_init(struct drm_device *dev,
/*set possible crtcs and clones*/
if (dsi_connector->pipe) {
encoder->possible_crtcs = (1 << 2);
- encoder->possible_clones = (1 << 1);
+ encoder->possible_clones = 0;
} else {
encoder->possible_crtcs = (1 << 0);
- encoder->possible_clones = (1 << 0);
+ encoder->possible_clones = 0;
}

dsi_connector->base.encoder = &dpi_output->base.base;