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author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-10-18 08:15:31 (GMT) |
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committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-10-22 20:34:47 (GMT) |
commit | 3b5c662e8f536ca47396116de82f08d771727076 (patch) | |
tree | 18c5696ab98584d7331dadd9cb054b21f8e13d2a /drivers/gpu/drm/drm_dp_helper.c | |
parent | a7c9655fdd89fae1749c2e5beadae8b7d32093af (diff) | |
download | linux-fsl-qoriq-3b5c662e8f536ca47396116de82f08d771727076.tar.xz |
drm: extract dp link bw helpers
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/drm_dp_helper.c')
-rw-r--r-- | drivers/gpu/drm/drm_dp_helper.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index 7ecaa11..3c4cccd 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -297,3 +297,31 @@ void drm_dp_link_train_channel_eq_delay(u8 dpcd[DP_RECEIVER_CAP_SIZE]) { mdelay(dpcd[DP_TRAINING_AUX_RD_INTERVAL] * 4); } EXPORT_SYMBOL(drm_dp_link_train_channel_eq_delay); + +u8 drm_dp_link_rate_to_bw_code(int link_rate) +{ + switch (link_rate) { + case 162000: + default: + return DP_LINK_BW_1_62; + case 270000: + return DP_LINK_BW_2_7; + case 540000: + return DP_LINK_BW_5_4; + } +} +EXPORT_SYMBOL(drm_dp_link_rate_to_bw_code); + +int drm_dp_bw_code_to_link_rate(u8 link_bw) +{ + switch (link_bw) { + case DP_LINK_BW_1_62: + default: + return 162000; + case DP_LINK_BW_2_7: + return 270000; + case DP_LINK_BW_5_4: + return 540000; + } +} +EXPORT_SYMBOL(drm_dp_bw_code_to_link_rate); |