Commit 59e520a6 authored by Mikko Perttunen's avatar Mikko Perttunen Committed by Thierry Reding
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drm/tegra: vic: Add comments on STREAMID registers 



Add comments clarifying use of the THI_STREAMID0 and THI_STREAMID1
registers.

Signed-off-by: default avatarMikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent 58ef3aeb

drivers/gpu/drm/tegra/vic.c

+12 −0
Original line number Diff line number Diff line
@@ -117,7 +117,19 @@ static int vic_boot(struct vic *vic) 
		if (spec->num_ids > 0) {

			value = spec->ids[0] & 0xffff;



			/*

			 * STREAMID0 is used for input/output buffers.

			 * Initialize it to SID_VIC in case context isolation

			 * is not enabled, and SID_VIC is used for both firmware

			 * and data buffers.

			 *

			 * If context isolation is enabled, it will be

			 * overridden by the SETSTREAMID opcode as part of

			 * each job.

			 */

			vic_writel(vic, value, VIC_THI_STREAMID0);



			/* STREAMID1 is used for firmware loading. */

			vic_writel(vic, value, VIC_THI_STREAMID1);

		}

	}