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Commit 11883865 authored by Manasi Navare's avatar Manasi Navare Committed by Steve Cohen
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drm/dp: Add HBR3 support in existing DRM DP helpers 



Existing helpers add support upto HBR2. This patch
adds support for HBR3 rate (8.1 Gbps) introduced as
part of DP 1.4 specification.

Change-Id: I6a3e50b2e148c6fae103afc73bb51e4b93e72a5c
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: default avatarManasi Navare <manasi.d.navare@intel.com>
Reviewed-by: default avatarHarry Wentland <harry.wentland@amd.com>
Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1516660991-20697-1-git-send-email-manasi.d.navare@intel.com
[cohens@codeaurora.org: resolve trivial conflict with downstream change]
Git-commit: e0bd878a959008f02a1280b1dd2c128324586af3
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Signed-off-by: default avatarSteve Cohen <cohens@codeaurora.org>
parent 72af9a4d

drivers/gpu/drm/drm_dp_mst_topology.c

+3 −0
Original line number Diff line number Diff line
@@ -2013,6 +2013,9 @@ static bool drm_dp_get_vc_payload_bw(int dp_link_bw, 
	case DP_LINK_BW_5_4:

		*out = 10 * dp_link_count;

		break;

	case DP_LINK_BW_8_1:

		*out = 15 * dp_link_count;

		break;

	}

	return true;

}

include/drm/drm_dp_helper.h

+1 −1
Original line number Diff line number Diff line
@@ -334,7 +334,7 @@ 
# define DP_LINK_BW_1_62		    0x06

# define DP_LINK_BW_2_7			    0x0a

# define DP_LINK_BW_5_4			    0x14    /* 1.2 */

# define DP_LINK_BW_8_1			    0x1e

# define DP_LINK_BW_8_1			    0x1e    /* 1.4 */



#define DP_LANE_COUNT_SET	            0x101

# define DP_LANE_COUNT_MASK		    0x0f