kernel.git/drivers/gpu/drm/amd/display/dc/link/protocols, branch linux-6.10.y

drm/amd/display: Fix FEC_READY write on DP LT

2024-09-18T17:25:13Z

[ Upstream commit a8baec4623aedf36d50767627f6eae5ebf07c6fb ] [Why/How] We can miss writing FEC_READY in some cases before LT start, which violates DP spec. Remove the condition guarding the DPCD write so that the write happens unconditionally. Cc: Mario Limonciello Cc: Alex Deucher Cc: stable@vger.kernel.org Reviewed-by: Wenjing Liu Acked-by: Wayne Lin Signed-off-by: Ilya Bakoulin Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin

drm/amd/display: Disable error correction if it's not supported

2024-09-18T17:25:13Z

[ Upstream commit a8ac994cf0693a1ce59410995594e56124a1c79f ] [Why] Error correction was enabled in a monitor which doesn't support. [How] Disable error correction if it's not supported Reviewed-by: Wenjing Liu Acked-by: Aurabindo Pillai Signed-off-by: Cruise Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Stable-dep-of: a8baec4623ae ("drm/amd/display: Fix FEC_READY write on DP LT") Signed-off-by: Sasha Levin

drm/amd/display: Validate function returns

2024-09-12T09:12:52Z

[ Upstream commit 673f816b9e1e92d1f70e1bf5f21b531e0ff9ad6c ] [WHAT & HOW] Function return values must be checked before data can be used in subsequent functions. This fixes 4 CHECKED_RETURN issues reported by Coverity. Reviewed-by: Harry Wentland Signed-off-by: Alex Hung Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin

drm/amd/display: use preferred link settings for dp signal only

2024-09-08T05:56:39Z

[ Upstream commit abf34ca465f5cd182b07701d3f3d369c0fc04723 ] [why] We set preferred link settings for virtual signal. However we don't support virtual signal for UHBR link rate. If preferred is set to UHBR link rate, we will allow virtual signal with UHBR link rate which causes system crashes. Reviewed-by: Dillon Varone Acked-by: Zaeem Mohamed Signed-off-by: Wenjing Liu Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin

drm/amd/display: Fix Coverity INTEGER_OVERFLOW within decide_fallback_link_setting_max_bw_policy

2024-09-08T05:56:24Z

[ Upstream commit 83c0c8361347cf43937348e8ca0a487679c003ae ] [Why] For addtion (uint8_t) variable + constant 1, coverity generates message below: Truncation due to cast operation on "cur_idx + 1" from 32 to 8 bits. Then Coverity assume result is 32 bits value be saved into 8 bits variable. When result is used as index to access array, Coverity suspects index invalid. [How] Change varaible type to uint32_t. Reviewed-by: Alex Hung Reviewed-by: Harry Wentland Acked-by: Tom Chung Signed-off-by: Hersen Wu Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin

drm/amd/display: Add missing NULL pointer check within dpcd_extend_address_range

2024-09-08T05:56:22Z

[ Upstream commit 5524fa301ba649f8cf00848f91468e0ba7e4f24c ] [Why & How] ASSERT if return NULL from kcalloc. Reviewed-by: Alex Hung Reviewed-by: Rodrigo Siqueira Acked-by: Tom Chung Signed-off-by: Hersen Wu Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin

drm/amd/display: Check index for aux_rd_interval before using

2024-09-08T05:56:22Z

[ Upstream commit 9ba2ea6337b4f159aecb177555a6a81da92d302e ] aux_rd_interval has size of 7 and should be checked. This fixes 3 OVERRUN and 1 INTEGER_OVERFLOW issues reported by Coverity. Reviewed-by: Rodrigo Siqueira Acked-by: Tom Chung Signed-off-by: Alex Hung Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin

Revert "drm/amd/display: Handle HPD_IRQ for internal link"

2024-08-14T13:34:36Z

commit a2919b25778b7479e477cf49af8c680017eafc24 upstream. [How&Why] This reverts commit 239b31bd5c3fef3698440bf6436b2068c6bb08a3. Due to the it effects Replay resync. Reviewed-by: Wenjing Liu Acked-by: Zaeem Mohamed Signed-off-by: Sung-huai Wang Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Greg Kroah-Hartman

drm/amd/display: Handle HPD_IRQ for internal link

2024-08-14T13:34:12Z

[ Upstream commit 239b31bd5c3fef3698440bf6436b2068c6bb08a3 ] [Why] TCON data is corrupted after electro static discharge test. Once the TCON data get corrupted, they will get themselves reset and send HPD_IRQ to source side. [How] Support HPD_IRQ for internal link, and restore the PSR/Replay setup. Reviewed-by: Robin Chen Acked-by: Aurabindo Pillai Signed-off-by: Sung-huai Wang Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin

drm/amd/display: Send DP_TOTAL_LTTPR_CNT during detection if LTTPR is present

2024-06-25T18:15:45Z

[WHY] New register field added in DP2.1 SCR, needed for auxless ALPM [HOW] Echo value read from 0xF0007 back to sink Reviewed-by: Wenjing Liu Cc: Mario Limonciello Cc: Alex Deucher Cc: stable@vger.kernel.org Signed-off-by: Alex Hung Signed-off-by: Michael Strauss Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher