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devarsht / cdns_dphy_v4_to_v3_rangediff.txt
Created July 4, 2025 11:55
cdns_dphy_v4_to_v3_rangediff.txt
1: 0aafe2dc5d1f ! 1: a669660cae99 phy: cadence: cdns-dphy: Fix PLL lock and O_CMN_READY polling
@@ Commit message
phy: cadence: cdns-dphy: Fix PLL lock and O_CMN_READY polling
PLL lockup and O_CMN_READY assertion can only happen after common state
- machine gets enabled (by programming DPHY_CMN_SSM register), but driver was
- polling them before the common state machine was enabled. To fix this :
+ machine gets enabled by programming DPHY_CMN_SSM register, but driver was
+ polling them before the common state machine was enabled which is
+ incorrect. This is as per the DPHY initialization sequence as mentioned in
@devarsht
devarsht / cdns_dphy_v4_traceprintk_logs.txt
Created July 3, 2025 14:32
cdns_dphy_v4_traceprintk_logs.txt
root@am62lxx-evm:~# cat /sys/kernel/tracing/trace
# tracer: nop
#
# entries-in-buffer/entries-written: 8/8 #P:2
#
# _-----=> irqs-off/BH-disabled
# / _----=> need-resched
# | / _---=> hardirq/softirq
# || / _--=> preempt-depth
# ||| / _-=> migrate-disable
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devarsht / v6_v5_rangediff_am62l.txt
Created May 7, 2025 12:50
v6_v5_rangediff_am62l
1: f36a4c3b069f = 1: e7e7e99be4dc dt-bindings: display: ti,am65x-dss: Add support for AM62L DSS
2: 7d6ce8735b92 ! 2: 5bdec3be79d8 drm/tidss: Update infrastructure to support K3 DSS cut-down versions
@@ drivers/gpu/drm/tidss/tidss_crtc.c: static void tidss_crtc_atomic_disable(struct
* the layers here as a work-around.
*/
- for (u32 layer = 0; layer < tidss->feat->num_planes; layer++)
-- dispc_ovr_enable_layer(tidss->dispc, tcrtc->hw_videoport, layer,
-- false);
-+ for (u32 layer = 0; layer < tidss->feat->num_vids; layer++) {
-+ u32 hw_id = tidss->feat->vid_info[layer].hw_id;
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devarsht / v6_dss_62l_series.txt
Last active May 7, 2025 11:44
v6_dss_62l_series
root@am62lxx-evm:~# kmsprint
Connector 0 (41) HDMI-A-1 (connected)
Encoder 0 (40) NONE
Crtc 0 (39) 1920x1080@59.72 138.000 1920/48/32/80/+ 1080/2/5/24/- 60 (59.72) 0x9 0x48
Plane 0 (32) fb-id: 43 (crtcs: 0) 0,0 1920x1080 -> 0,0 1920x1080 (AR12 AB12 RA12 RG16 BG16 AR15 AB15 AR24 AB24 RA24 BA24 RG24 BG24 AR30 AB30 XR12 XB12 RX12 XR15 XB15 XR24 XB24 RX24 BX24 XR30 XB30 YUYV UYVY
NV12)
FB 43 1920x1080
root@am62lxx-evm:~# kmstest
Connector 0/@41: HDMI-A-1
Crtc 0/@39: 1920x1080@59.72 138.000 1920/48/32/80/+ 1080/2/5/24/- 60 (59.72) 0x9 0x48
@devarsht
devarsht / v3_cdns_dphy_range_diff.txt
Created April 30, 2025 13:04
v3_cdns_dphy_range_diff
1: cfab76afd827 ! 1: 1c09e1b86bbb phy: cadence: cdns-dphy: Fix PLL lock and O_CMN_READY polling
@@ Commit message
phy: cadence: cdns-dphy: Fix PLL lock and O_CMN_READY polling
PLL lockup and O_CMN_READY assertion can only happen after common state
- machine gets enabled, but driver was polling them before the common state
- machine was enabled. To fix this, add new function callbacks polling on PLL
- lock and O_CMN_READY assertion and call them only after common state
- machine gets enabled.
+ machine gets enabled (by programming DPHY_CMN_SSM register), but driver was
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devarsht / 62l_v5_vs_v4_rangediff.txt
Created April 29, 2025 13:39
62l_v5_vs_v4_rangediff
1: 82ccc24826a8 ! 1: 7d6ce8735b92 drm/tidss: Update infrastructure to support K3 DSS cut-down versions
@@ drivers/gpu/drm/tidss/tidss_crtc.c: static void tidss_crtc_atomic_disable(struct
- for (u32 layer = 0; layer < tidss->feat->num_planes; layer++)
- dispc_ovr_enable_layer(tidss->dispc, tcrtc->hw_videoport, layer,
- false);
-+ for (u32 layer = 0; layer < tidss->feat->num_vids; layer++)
++ for (u32 layer = 0; layer < tidss->feat->num_vids; layer++) {
++ u32 hw_id = tidss->feat->vid_info[layer].hw_id;
++
+ dispc_ovr_enable_layer(tidss->dispc, tcrtc->hw_videoport,
@devarsht
devarsht / cdns_dphy_v3_pll_timeout.txt
Last active May 1, 2025 08:39
cdns_dphy_v3_pll_timeout
root@am62pxx-evm:~# kmsprint --device="/dev/dri/card1"
Connector 0 (41) DSI-1 (connected)
Encoder 0 (40) NONE
Crtc 0 (39) 800x480@60.00 28.569 800/48/32/80/- 480/3/7/6/- 60 (60.00) 0xa 0x48
Plane 0 (32) fb-id: 49 (crtcs: 0) 0,0 800x480 -> 0,0 800x480 (AR12 AB12 RA12 RG16 BG16 AR15 AB15 AR24 AB24 RA24 BA24 RG24 BG24 AR30 AB30 XR12 XB12 RX12 XR15 XB15 XR24 XB24 RX24 BX24 XR30 XB30 YUYV UYVY NV1
2)
FB 49 800x480
root@am62pxx-evm:~# kmstest
press enter to exit
^C
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devarsht / am62l_v5_test_logs_am62l_am62_am62a_board.txt
Last active April 29, 2025 13:42
am62l_v5_test_logs_am62a_am62_am62l
##########AM62A#########
root@am62axx-evm:~#
root@am62axx-evm:~# uname -r
6.15.0-rc4-next-20250428-00003-g2694e8611bbf-dirty
modetest -M tidss -s 41@39:1920x1080 -P 42@39:1280x720 -w 42:zpos:0 -w 32:zpos:1 -w 32:alpha:44444 -v
setting mode 1920x1080-59.72Hz on connectors 41, crtc 39
testing 1280x720@XR24 overlay plane 42
freq: 60.64Hz
freq: 59.72Hz
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devarsht / am62l_v4_range_diff.txt
Created March 26, 2025 14:48
am62l_v4_range_diff
Only diff for: drm/tidss: Update infrastructure to support K3 DSS cut-down versions
diff --git a/drivers/gpu/drm/tidss/tidss_crtc.c b/drivers/gpu/drm/tidss/tidss_crtc.c
index 0e08d2242c90..6db100b81482 100644
--- a/drivers/gpu/drm/tidss/tidss_crtc.c
+++ b/drivers/gpu/drm/tidss/tidss_crtc.c
@@ -130,7 +130,7 @@ static void tidss_crtc_position_planes(struct tidss_device *tidss,
!to_tidss_crtc_state(cstate)->plane_pos_changed)
return;
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devarsht / am62l_v4_rangediff
Created March 21, 2025 13:21
am62l_v4_rangediff
1: ce42e04b8c4e ! 1: 0ac25605edfe drm/tidss: Update infra to support DSS7 cut-down versions
@@ Metadata
Author: Devarsh Thakkar <devarsht@ti.com>
## Commit message ##
- drm/tidss: Update infra to support DSS7 cut-down versions
+ drm/tidss: Update infrastructure to support K3 DSS cut-down versions
SoCs like AM62Lx support cut-down version of DSS7 where
although same register space is supported as in other