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drm/radeon: improve dvi_mode_valid 

Make sure we have an HDMI monitor before validating modes with
clocks >165 Mhz on single link connections.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2014-06-16 17:46:57 -04:00
parent 6536a3a667
commit f2263fc796
1 changed files with 7 additions and 9 deletions
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16
drivers/gpu/drm/radeon/radeon_connectors.c
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@ -1288,17 +1288,15 @@ static int radeon_dvi_mode_valid(struct drm_connector *connector,
(radeon_connector->connector_object_id == CONNECTOR_OBJECT_ID_DUAL_LINK_DVI_D) ||
(radeon_connector->connector_object_id == CONNECTOR_OBJECT_ID_HDMI_TYPE_B))
return MODE_OK;
else if (radeon_connector->connector_object_id == CONNECTOR_OBJECT_ID_HDMI_TYPE_A) {
if (ASIC_IS_DCE6(rdev)) {
/* HDMI 1.3+ supports max clock of 340 Mhz */
if (mode->clock > 340000)
return MODE_CLOCK_HIGH;
else
return MODE_OK;
} else
else if (ASIC_IS_DCE6(rdev) && drm_detect_hdmi_monitor(radeon_connector->edid)) {
/* HDMI 1.3+ supports max clock of 340 Mhz */
if (mode->clock > 340000)
return MODE_CLOCK_HIGH;
} else
else
return MODE_OK;
} else {
return MODE_CLOCK_HIGH;
}
}
/* check against the max pixel clock */