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authorRomain Perier <romain.perier@collabora.com>2017-04-07 14:17:43 +0200
committerArchit Taneja <architt@codeaurora.org>2017-04-10 14:53:10 +0530
commit6ce2ca580f10d8d76cc3661a0b6b88d419725c9c (patch)
tree675363e71ebf934eed8ca9810043a2de0322f097 /drivers/gpu/drm/bridge
parentc98cdff94a6a7877923dec1329c2b76d6247d076 (diff)
downloadlinux-6ce2ca580f10d8d76cc3661a0b6b88d419725c9c.tar.bz2
drm: dw-hdmi: Implement the mode_fixup drm helper
This helper is supposed to validate or reject the modeline before it applied by the mode setting. Currently this function has been dropped, it was previously set to a dummy function that always returned true. For both cases, this means that userspace can ask for a bad modeline that will be always accepted. On some platforms, like Rockchip, the drm dw_hdmi-rockchip variant driver already implements the atomic_check drm helper, so mode_fixup cannot be handled and implemented there (as drm_atomic_helper relies on either atomic_check or mode_fixup). This commit implements this helper. It only checks that this mode is correct from the connector point of view. Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Romain Perier <romain.perier@collabora.com> Signed-off-by: Archit Taneja <architt@codeaurora.org> Link: http://patchwork.freedesktop.org/patch/msgid/20170407121743.4142-1-romain.perier@collabora.com
Diffstat (limited to 'drivers/gpu/drm/bridge')
-rw-r--r--drivers/gpu/drm/bridge/synopsys/dw-hdmi.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 3bc856cc6daa..4e1f54a675d8 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -1947,6 +1947,20 @@ static int dw_hdmi_bridge_attach(struct drm_bridge *bridge)
return 0;
}
+static bool dw_hdmi_bridge_mode_fixup(struct drm_bridge *bridge,
+ const struct drm_display_mode *orig_mode,
+ struct drm_display_mode *mode)
+{
+ struct dw_hdmi *hdmi = bridge->driver_private;
+ struct drm_connector *connector = &hdmi->connector;
+ enum drm_mode_status status;
+
+ status = dw_hdmi_connector_mode_valid(connector, mode);
+ if (status != MODE_OK)
+ return false;
+ return true;
+}
+
static void dw_hdmi_bridge_mode_set(struct drm_bridge *bridge,
struct drm_display_mode *orig_mode,
struct drm_display_mode *mode)
@@ -1988,6 +2002,7 @@ static const struct drm_bridge_funcs dw_hdmi_bridge_funcs = {
.enable = dw_hdmi_bridge_enable,
.disable = dw_hdmi_bridge_disable,
.mode_set = dw_hdmi_bridge_mode_set,
+ .mode_fixup = dw_hdmi_bridge_mode_fixup,
};
static irqreturn_t dw_hdmi_i2c_irq(struct dw_hdmi *hdmi)