diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_modes.c')
-rw-r--r-- | drivers/gpu/drm/i915/intel_modes.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_modes.c b/drivers/gpu/drm/i915/intel_modes.c new file mode 100644 index 000000000000..e42019e5d661 --- /dev/null +++ b/drivers/gpu/drm/i915/intel_modes.c @@ -0,0 +1,83 @@ +/* + * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> + * Copyright (c) 2007 Intel Corporation + * Jesse Barnes <jesse.barnes@intel.com> + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#include <linux/i2c.h> +#include <linux/fb.h> +#include "drmP.h" +#include "intel_drv.h" + +/** + * intel_ddc_probe + * + */ +bool intel_ddc_probe(struct intel_output *intel_output) +{ + u8 out_buf[] = { 0x0, 0x0}; + u8 buf[2]; + int ret; + struct i2c_msg msgs[] = { + { + .addr = 0x50, + .flags = 0, + .len = 1, + .buf = out_buf, + }, + { + .addr = 0x50, + .flags = I2C_M_RD, + .len = 1, + .buf = buf, + } + }; + + ret = i2c_transfer(&intel_output->ddc_bus->adapter, msgs, 2); + if (ret == 2) + return true; + + return false; +} + +/** + * intel_ddc_get_modes - get modelist from monitor + * @connector: DRM connector device to use + * + * Fetch the EDID information from @connector using the DDC bus. + */ +int intel_ddc_get_modes(struct intel_output *intel_output) +{ + struct edid *edid; + int ret = 0; + + edid = drm_get_edid(&intel_output->base, + &intel_output->ddc_bus->adapter); + if (edid) { + drm_mode_connector_update_edid_property(&intel_output->base, + edid); + ret = drm_add_edid_modes(&intel_output->base, edid); + kfree(edid); + } + + return ret; +} |