[linux-2.6-block.git] / drivers / gpu / drm / nouveau / nvkm / engine / disp / hdmi.c

// SPDX-License-Identifier: GPL-2.0
#include "hdmi.h"

void pack_hdmi_infoframe(struct packed_hdmi_infoframe *packed_frame,
			 u8 *raw_frame, ssize_t len)
{
	u32 header = 0;
	u32 subpack0_low = 0;
	u32 subpack0_high = 0;
	u32 subpack1_low = 0;
	u32 subpack1_high = 0;

	switch (len) {
		/*
		 * "When in doubt, use brute force."
		 *     -- Ken Thompson.
		 */
	default:
		/*
		 * We presume that no valid frame is longer than 17
		 * octets, including header...  And truncate to that
		 * if it's longer.
		 */
	case 17:
		subpack1_high = (raw_frame[16] << 16);
	case 16:
		subpack1_high |= (raw_frame[15] << 8);
	case 15:
		subpack1_high |= raw_frame[14];
	case 14:
		subpack1_low = (raw_frame[13] << 24);
	case 13:
		subpack1_low |= (raw_frame[12] << 16);
	case 12:
		subpack1_low |= (raw_frame[11] << 8);
	case 11:
		subpack1_low |= raw_frame[10];
	case 10:
		subpack0_high = (raw_frame[9] << 16);
	case 9:
		subpack0_high |= (raw_frame[8] << 8);
	case 8:
		subpack0_high |= raw_frame[7];
	case 7:
		subpack0_low = (raw_frame[6] << 24);
	case 6:
		subpack0_low |= (raw_frame[5] << 16);
	case 5:
		subpack0_low |= (raw_frame[4] << 8);
	case 4:
		subpack0_low |= raw_frame[3];
	case 3:
		header = (raw_frame[2] << 16);
	case 2:
		header |= (raw_frame[1] << 8);
	case 1:
		header |= raw_frame[0];
	case 0:
		break;
	}

	packed_frame->header = header;
	packed_frame->subpack0_low = subpack0_low;
	packed_frame->subpack0_high = subpack0_high;
	packed_frame->subpack1_low = subpack1_low;
	packed_frame->subpack1_high = subpack1_high;
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
af85389c	2	#include "hdmi.h"
f60213c0 AB	3
	4	void pack_hdmi_infoframe(struct packed_hdmi_infoframe *packed_frame,
	5	u8 *raw_frame, ssize_t len)
	6	{
	7	u32 header = 0;
	8	u32 subpack0_low = 0;
	9	u32 subpack0_high = 0;
	10	u32 subpack1_low = 0;
	11	u32 subpack1_high = 0;
	12
	13	switch (len) {
	14	/*
	15	* "When in doubt, use brute force."
	16	* -- Ken Thompson.
	17	*/
	18	default:
	19	/*
	20	* We presume that no valid frame is longer than 17
	21	* octets, including header... And truncate to that
	22	* if it's longer.
	23	*/
	24	case 17:
	25	subpack1_high = (raw_frame[16] << 16);
	26	case 16:
	27	subpack1_high \|= (raw_frame[15] << 8);
	28	case 15:
	29	subpack1_high \|= raw_frame[14];
	30	case 14:
	31	subpack1_low = (raw_frame[13] << 24);
	32	case 13:
	33	subpack1_low \|= (raw_frame[12] << 16);
	34	case 12:
	35	subpack1_low \|= (raw_frame[11] << 8);
	36	case 11:
	37	subpack1_low \|= raw_frame[10];
	38	case 10:
	39	subpack0_high = (raw_frame[9] << 16);
	40	case 9:
	41	subpack0_high \|= (raw_frame[8] << 8);
	42	case 8:
	43	subpack0_high \|= raw_frame[7];
	44	case 7:
	45	subpack0_low = (raw_frame[6] << 24);
	46	case 6:
	47	subpack0_low \|= (raw_frame[5] << 16);
	48	case 5:
	49	subpack0_low \|= (raw_frame[4] << 8);
	50	case 4:
	51	subpack0_low \|= raw_frame[3];
	52	case 3:
	53	header = (raw_frame[2] << 16);
	54	case 2:
	55	header \|= (raw_frame[1] << 8);
	56	case 1:
	57	header \|= raw_frame[0];
	58	case 0:
	59	break;
	60	}
	61
	62	packed_frame->header = header;
	63	packed_frame->subpack0_low = subpack0_low;
	64	packed_frame->subpack0_high = subpack0_high;
	65	packed_frame->subpack1_low = subpack1_low;
	66	packed_frame->subpack1_high = subpack1_high;
67	}