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authorDave Airlie <airlied@redhat.com>2010-02-08 13:16:55 +1000
committerDave Airlie <airlied@redhat.com>2010-02-09 08:54:42 +1000
commit4b9d2a2112163a757943c78ea98587fc9e828641 (patch)
treec929d8d3dfb7c4fc7c8231ae8f7e987094544096
parent1ca137cdcd4e11af03dbe073d48a470b833a456d (diff)
drm/radeon/kms: don't crash if no DDC bus on VGA/DVI connector.
This is strange - like really really strange, twilight zone of strange. VGA ports have DDC buses, but sometimes for some reasons the BIOS says we don't and we oops - AMD mentioned bios bugs so we'll have to add quirks. reported on irc by nirbheek and https://bugzilla.redhat.com/show_bug.cgi?id=554323 Signed-off-by: Dave Airlie <airlied@redhat.com>
-rw-r--r--drivers/gpu/drm/radeon/radeon_connectors.c20
-rw-r--r--drivers/gpu/drm/radeon/radeon_display.c11
2 files changed, 22 insertions, 9 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
index 2d8e5a70f28..23818854001 100644
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -580,16 +580,18 @@ static enum drm_connector_status radeon_vga_detect(struct drm_connector *connect
struct radeon_connector *radeon_connector = to_radeon_connector(connector);
struct drm_encoder *encoder;
struct drm_encoder_helper_funcs *encoder_funcs;
- bool dret;
+ bool dret = false;
enum drm_connector_status ret = connector_status_disconnected;
encoder = radeon_best_single_encoder(connector);
if (!encoder)
ret = connector_status_disconnected;
- radeon_i2c_do_lock(radeon_connector->ddc_bus, 1);
- dret = radeon_ddc_probe(radeon_connector);
- radeon_i2c_do_lock(radeon_connector->ddc_bus, 0);
+ if (radeon_connector->ddc_bus) {
+ radeon_i2c_do_lock(radeon_connector->ddc_bus, 1);
+ dret = radeon_ddc_probe(radeon_connector);
+ radeon_i2c_do_lock(radeon_connector->ddc_bus, 0);
+ }
if (dret) {
if (radeon_connector->edid) {
kfree(radeon_connector->edid);
@@ -740,11 +742,13 @@ static enum drm_connector_status radeon_dvi_detect(struct drm_connector *connect
struct drm_mode_object *obj;
int i;
enum drm_connector_status ret = connector_status_disconnected;
- bool dret;
+ bool dret = false;
- radeon_i2c_do_lock(radeon_connector->ddc_bus, 1);
- dret = radeon_ddc_probe(radeon_connector);
- radeon_i2c_do_lock(radeon_connector->ddc_bus, 0);
+ if (radeon_connector->ddc_bus) {
+ radeon_i2c_do_lock(radeon_connector->ddc_bus, 1);
+ dret = radeon_ddc_probe(radeon_connector);
+ radeon_i2c_do_lock(radeon_connector->ddc_bus, 0);
+ }
if (dret) {
if (radeon_connector->edid) {
kfree(radeon_connector->edid);
diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index 6a92f994cc2..7e17a362b54 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -278,7 +278,7 @@ static void radeon_print_display_setup(struct drm_device *dev)
DRM_INFO(" %s\n", connector_names[connector->connector_type]);
if (radeon_connector->hpd.hpd != RADEON_HPD_NONE)
DRM_INFO(" %s\n", hpd_names[radeon_connector->hpd.hpd]);
- if (radeon_connector->ddc_bus)
+ if (radeon_connector->ddc_bus) {
DRM_INFO(" DDC: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
radeon_connector->ddc_bus->rec.mask_clk_reg,
radeon_connector->ddc_bus->rec.mask_data_reg,
@@ -288,6 +288,15 @@ static void radeon_print_display_setup(struct drm_device *dev)
radeon_connector->ddc_bus->rec.en_data_reg,
radeon_connector->ddc_bus->rec.y_clk_reg,
radeon_connector->ddc_bus->rec.y_data_reg);
+ } else {
+ if (connector->connector_type == DRM_MODE_CONNECTOR_VGA ||
+ connector->connector_type == DRM_MODE_CONNECTOR_DVII ||
+ connector->connector_type == DRM_MODE_CONNECTOR_DVID ||
+ connector->connector_type == DRM_MODE_CONNECTOR_DVIA ||
+ connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
+ connector->connector_type == DRM_MODE_CONNECTOR_HDMIB)
+ DRM_INFO(" DDC: no ddc bus - possible BIOS bug - please report to xorg-driver-ati@lists.x.org\n");
+ }
DRM_INFO(" Encoders:\n");
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
radeon_encoder = to_radeon_encoder(encoder);