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From: Bindu Ramamurthy <bindu.r@amd.com>
To: <amd-gfx@lists.freedesktop.org>
Cc: Martin Tsai <martin.tsai@amd.com>,
	Eryk.Brol@amd.com, Sunpeng.Li@amd.com, Harry.Wentland@amd.com,
	Qingqing.Zhuo@amd.com, Rodrigo.Siqueira@amd.com,
	Aurabindo.Pillai@amd.com, Bhawanpreet.Lakha@amd.com,
	bindu.r@amd.com
Subject: [PATCH 03/14] drm/amd/display: Modify the hdcp device count check condition
Date: Fri, 18 Dec 2020 17:28:53 -0500	[thread overview]
Message-ID: <20201218222904.393785-4-bindu.r@amd.com> (raw)
In-Reply-To: <20201218222904.393785-1-bindu.r@amd.com>

From: Martin Tsai <martin.tsai@amd.com>

[why]
Some MST display may not report the internal panel to DEVICE_COUNT,
that makes the check condition always failed.

[how]
To update this condition with the reported device count + 1
(because the immediate repeater's internal panel is possibly
not included in DEVICE_COUNT)

Signed-off-by: Martin Tsai <martin.tsai@amd.com>
Acked-by: Bindu Ramamurthy <bindu.r@amd.com>
---
 .../gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c    | 8 ++++++--
 .../gpu/drm/amd/display/modules/hdcp/hdcp2_execution.c    | 7 +++++--
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c
index f244b72e74e0..73ca49f05bd3 100644
--- a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c
+++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c
@@ -128,8 +128,12 @@ static inline uint8_t get_device_count(struct mod_hdcp *hdcp)
 
 static inline enum mod_hdcp_status check_device_count(struct mod_hdcp *hdcp)
 {
-	/* device count must be greater than or equal to tracked hdcp displays */
-	return (get_device_count(hdcp) < get_active_display_count(hdcp)) ?
+	/* Some MST display may choose to report the internal panel as an HDCP RX.
+	 * To update this condition with 1(because the immediate repeater's internal
+	 * panel is possibly not included in DEVICE_COUNT) + get_device_count(hdcp).
+	 * Device count must be greater than or equal to tracked hdcp displays.
+	 */
+	return ((1 + get_device_count(hdcp)) < get_active_display_count(hdcp)) ?
 			MOD_HDCP_STATUS_HDCP1_DEVICE_COUNT_MISMATCH_FAILURE :
 			MOD_HDCP_STATUS_SUCCESS;
 }
diff --git a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_execution.c b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_execution.c
index 549c113abcf7..a0895a7efda2 100644
--- a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_execution.c
+++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_execution.c
@@ -207,8 +207,11 @@ static inline uint8_t get_device_count(struct mod_hdcp *hdcp)
 
 static enum mod_hdcp_status check_device_count(struct mod_hdcp *hdcp)
 {
-	/* device count must be greater than or equal to tracked hdcp displays */
-	return (get_device_count(hdcp) < get_active_display_count(hdcp)) ?
+	/* Some MST display may choose to report the internal panel as an HDCP RX.   */
+	/* To update this condition with 1(because the immediate repeater's internal */
+	/* panel is possibly not included in DEVICE_COUNT) + get_device_count(hdcp). */
+	/* Device count must be greater than or equal to tracked hdcp displays.      */
+	return ((1 + get_device_count(hdcp)) < get_active_display_count(hdcp)) ?
 			MOD_HDCP_STATUS_HDCP2_DEVICE_COUNT_MISMATCH_FAILURE :
 			MOD_HDCP_STATUS_SUCCESS;
 }
-- 
2.25.1

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  parent reply	other threads:[~2020-12-18 22:30 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-18 22:28 [PATCH 00/14] DC Patches December 21, 2020 Bindu Ramamurthy
2020-12-18 22:28 ` [PATCH 01/14] drm/amd/display: handler not correctly checked at remove_irq_handler Bindu Ramamurthy
2020-12-18 22:28 ` [PATCH 02/14] drm/amd/display: Interfaces for hubp blank and soft reset Bindu Ramamurthy
2020-12-18 22:28 ` Bindu Ramamurthy [this message]
2020-12-18 22:28 ` [PATCH 04/14] drm/amd/display: To modify the condition in indicating branch device Bindu Ramamurthy
2020-12-18 22:28 ` [PATCH 05/14] drm/amd/display: gradually ramp ABM intensity Bindu Ramamurthy
2020-12-18 22:28 ` [PATCH 06/14] drm/amd/display: change SMU repsonse timeout to 2s Bindu Ramamurthy
2020-12-18 22:28 ` [PATCH 07/14] drm/amd/display: Update RN/VGH active display count workaround Bindu Ramamurthy
2020-12-18 22:28 ` [PATCH 08/14] drm/amd/display: Remove unnecessary NULL check Bindu Ramamurthy
2020-12-18 22:28 ` [PATCH 09/14] drm/amd/display: Multi-display underflow observed Bindu Ramamurthy
2020-12-18 22:29 ` [PATCH 10/14] drm/amd/display: Acquire DSC during split stream for ODM only if top_pipe Bindu Ramamurthy
2020-12-18 22:29 ` [PATCH 11/14] drm/amd/display: updated wm table for Renoir Bindu Ramamurthy
2020-12-18 22:29 ` [PATCH 12/14] drm/amd/display: [FW Promotion] Release 0.0.47 Bindu Ramamurthy
2020-12-18 22:29 ` [PATCH 13/14] drm/amd/display: always program DPPDTO unless not safe to lower Bindu Ramamurthy
2020-12-18 22:29 ` [PATCH 14/14] drm/amd/display: add getter routine to retrieve mpcc mux Bindu Ramamurthy

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