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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>
This commit is contained in:
Dave Airlie 2010-02-08 13:16:55 +10:00
parent 1ca137cdcd
commit 4b9d2a2112
2 changed files with 22 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/gpu/drm/radeon/radeon_connectors.c
View File

@ -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);

11
drivers/gpu/drm/radeon/radeon_display.c
View File

@ -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);