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authorCharlene Liu <Charlene.Liu@amd.com>2020-09-21 21:24:09 +0300
committerAlex Deucher <alexander.deucher@amd.com>2020-10-05 22:16:50 +0300
commitb15cde19c32d8d543eae2e3cc7c51ba688b12551 (patch)
treeb3b16876d1ef7894246fb7d87506671a2a1eb58e /drivers/gpu/drm/amd/display/dc/dce120
parent54e8094a76bc8cd41d1ec5c2c2a8755e64349142 (diff)
downloadlinux-b15cde19c32d8d543eae2e3cc7c51ba688b12551.tar.xz
drm/amd/display: Add i2c speed arbitration for dc_i2c and hdcp_i2c
[why] HDCP 1.4 failed on SL8800 SW w/a test driver use. [how] Slow down the HW i2c speed when used by HW i2c. This request: each acquired_i2c_engine setup the i2c speed needed and sets the I2c engine for HDCP use at release_engine. This covers SW using HW i2c engine and HDCP using HW i2c engine. for dmcu using HW i2c engine, needs add similar logic in dmcu fw. Signed-off-by: Charlene Liu <Charlene.Liu@amd.com> Reviewed-by: Chris Park <Chris.Park@amd.com> Acked-by: Eryk Brol <eryk.brol@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dce120')
-rw-r--r--drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c b/drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c
index 8f362e8c1787..16fe7344702f 100644
--- a/drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c
@@ -1080,6 +1080,7 @@ static bool dce120_resource_construct(
dc->caps.max_downscale_ratio = 200;
dc->caps.i2c_speed_in_khz = 100;
+ dc->caps.i2c_speed_in_khz_hdcp = 100; /*1.4 w/a not applied by default*/
dc->caps.max_cursor_size = 128;
dc->caps.dual_link_dvi = true;
dc->caps.psp_setup_panel_mode = true;