blob: ed7027b458b5e3abb3830ed15ced3e1863c218ee (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
From ba30c754ae5f4122d1bfd052bc6d7161ebb84774 Mon Sep 17 00:00:00 2001
From: Eryk Brol <eryk.brol@amd.com>
Date: Wed, 15 May 2019 15:12:41 -0400
Subject: [PATCH 2030/2940] drm/amd/display: Increase Backlight Gain Step Size
[Why]
Some backlight tests fail due to backlight settling
taking too long. This happens because the step
size used to change backlight levels is too small.
[How]
1. Change the size of the backlight gain step size
2. Change how DMCU firmware gets the step size value
so that it is passed in by driver during DMCU initn
Signed-off-by: Eryk Brol <eryk.brol@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
---
drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c | 3 +++
drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.h | 2 ++
2 files changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c b/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c
index 6504227ead9c..c2bc36f9f6c7 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c
@@ -388,6 +388,9 @@ static bool dcn10_dmcu_init(struct dmcu *dmcu)
/* Set initialized ramping boundary value */
REG_WRITE(MASTER_COMM_DATA_REG1, 0xFFFF);
+ /* Set backlight ramping stepsize */
+ REG_WRITE(MASTER_COMM_DATA_REG2, abm_gain_stepsize);
+
/* Set command to initialize microcontroller */
REG_UPDATE(MASTER_COMM_CMD_REG, MASTER_COMM_CMD_REG_BYTE0,
MCP_INIT_DMCU);
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.h b/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.h
index 60ce56f60ae3..5bd0df55aa5d 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.h
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.h
@@ -263,4 +263,6 @@ struct dmcu *dcn10_dmcu_create(
void dce_dmcu_destroy(struct dmcu **dmcu);
+static const uint32_t abm_gain_stepsize = 0x0060;
+
#endif /* _DCE_ABM_H_ */
--
2.17.1
|
