Initial import of modesetting for intel driver in DRM

1 files changed, 49 insertions, 0 deletions

diff --git a/linux-core/intel_modes.c b/linux-core/intel_modes.c
new file mode 100644
index 00000000..0e56147d
--- /dev/null
+++ b/linux-core/intel_modes.c
@@ -0,0 +1,49 @@
+#include <linux/i2c.h>
+#include <linux/fb.h>
+#include "drmP.h"
+#include "intel_drv.h"
+
+/**
+ * intel_ddc_probe
+ *
+ */
+bool intel_ddc_probe(struct drm_output *output)
+{
+	struct intel_output *intel_output = output->driver_private;
+	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
+ * @output: DRM output device to use
+ *
+ * Fetch the EDID information from @output using the DDC bus.
+ */
+int intel_ddc_get_modes(struct drm_output *output)
+{
+	struct intel_output *intel_output = output->driver_private;
+
+	return drm_add_edid_modes(output, &intel_output->ddc_bus->adapter);
+}