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drm/panel: samsung-s6e88a0-ams427ap24: Add brightness control

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The tables for brightness to candela, aid and elvss were taken from downstream
kernel file "dsi_panel_S6E88A0_AMS427AP24_qhd_octa_video.dtsi" [1][2][3].

The gamma table gets generated in "ss_dsi_smart_dimming_S6E88A0_AMS427AP24.c" [4]
with hard-coded starting values. The function smart_dimming_init() [5] goes
through the v{*}_adjustments, generate_gray_scale and gamma_init procedure.
Instead of calculating it manually, it's easier to compile a custom downstream
kernel with SMART_DIMMING_DEBUG enabled and read out dmesg early at boot.

Selection of the values for aid and elvss are again according to downstream
file "dsi_panel_S6E88A0_AMS427AP24_qhd_octa_video.dtsi" [6][7].

The set of write commands is guided by downstream file "ss_dsi_panel_common.c" [8]
followed by "ss_dsi_panel_S6E88A0_AMS427AP24.c" [9].

The dsi mode flag MIPI_DSI_MODE_VIDEO_NO_HFP prevents screen flickering while
changing the brightness.

[1] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/drivers/video/msm/mdss/samsung/S6E88A0_AMS427AP24/dsi_panel_S6E88A0_AMS427AP24_qhd_octa_video.dtsi#L341-L397
[2] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/drivers/video/msm/mdss/samsung/S6E88A0_AMS427AP24/dsi_panel_S6E88A0_AMS427AP24_qhd_octa_video.dtsi#L214-L254
[3] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/drivers/video/msm/mdss/samsung/S6E88A0_AMS427AP24/dsi_panel_S6E88A0_AMS427AP24_qhd_octa_video.dtsi#L301-L320
[4] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/drivers/video/msm/mdss/samsung/S6E88A0_AMS427AP24/ss_dsi_smart_dimming_S6E88A0_AMS427AP24.c
[5] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/drivers/video/msm/mdss/samsung/S6E88A0_AMS427AP24/ss_dsi_smart_dimming_S6E88A0_AMS427AP24.c#L1816-L1900
[6] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/drivers/video/msm/mdss/samsung/S6E88A0_AMS427AP24/dsi_panel_S6E88A0_AMS427AP24_qhd_octa_video.dtsi#L256-L268
[7] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/drivers/video/msm/mdss/samsung/S6E88A0_AMS427AP24/dsi_panel_S6E88A0_AMS427AP24_qhd_octa_video.dtsi#L322-L334
[8] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/drivers/video/msm/mdss/samsung/ss_dsi_panel_common.c#L1389-L1517
[9] https://github.com/msm8916-mainline/linux-downstream/blob/GT-I9195I/drivers/video/msm/mdss/samsung/S6E88A0_AMS427AP24/ss_dsi_panel_S6E88A0_AMS427AP24.c#L666-L678

Signed-off-by: Jakob Hauser <jahau@rocketmail.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/30c154954a4e0f75d90f6ef6f393a5ba8b3ffea9.1730070570.git.jahau@rocketmail.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/30c154954a4e0f75d90f6ef6f393a5ba8b3ffea9.1730070570.git.jahau@rocketmail.com
This commit is contained in:
Jakob Hauser 2024-10-28 00:42:05 +01:00 committed by Neil Armstrong
parent d5658db2a0
commit 5b67fdf166
2 changed files with 521 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/gpu/drm/panel/Kconfig
View File

@ -636,6 +636,7 @@ config DRM_PANEL_SAMSUNG_S6E88A0_AMS427AP24
tristate "Samsung AMS427AP24 panel with S6E88A0 controller"
depends on GPIOLIB && OF && REGULATOR
depends on DRM_MIPI_DSI
depends on BACKLIGHT_CLASS_DEVICE
help
Say Y here if you want to enable support for Samsung AMS427AP24 panel
with S6E88A0 controller (found in Samsung Galaxy S4 Mini Value Edition

532
drivers/gpu/drm/panel/panel-samsung-s6e88a0-ams427ap24.c
View File

@ -4,6 +4,7 @@
* Copyright (c) 2024 Jakob Hauser <jahau@rocketmail.com>
*/
#include <linux/backlight.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
@ -16,8 +17,24 @@
#include <drm/drm_panel.h>
#include <drm/drm_probe_helper.h>
#define NUM_STEPS_CANDELA 54
#define NUM_STEPS_AID 39
#define NUM_STEPS_ELVSS 17
/* length of the payload data, thereof fixed and variable */
#define FIX_LEN_AID 4
#define FIX_LEN_ELVSS 2
#define FIX_LEN_GAMMA 1
#define VAR_LEN_AID 2
#define VAR_LEN_ELVSS 1
#define VAR_LEN_GAMMA 33
#define LEN_AID (FIX_LEN_AID + VAR_LEN_AID)
#define LEN_ELVSS (FIX_LEN_ELVSS + VAR_LEN_ELVSS)
#define LEN_GAMMA (FIX_LEN_GAMMA + VAR_LEN_GAMMA)
struct s6e88a0_ams427ap24 {
struct drm_panel panel;
struct backlight_device *bl_dev;
struct mipi_dsi_device *dsi;
struct regulator_bulk_data *supplies;
struct gpio_desc *reset_gpio;
@ -34,6 +51,470 @@ struct s6e88a0_ams427ap24 *to_s6e88a0_ams427ap24(struct drm_panel *panel)
return container_of(panel, struct s6e88a0_ams427ap24, panel);
}
enum candela {
CANDELA_10CD, /* 0 */
CANDELA_11CD,
CANDELA_12CD,
CANDELA_13CD,
CANDELA_14CD,
CANDELA_15CD,
CANDELA_16CD,
CANDELA_17CD,
CANDELA_19CD,
CANDELA_20CD,
CANDELA_21CD,
CANDELA_22CD,
CANDELA_24CD,
CANDELA_25CD,
CANDELA_27CD,
CANDELA_29CD,
CANDELA_30CD,
CANDELA_32CD,
CANDELA_34CD,
CANDELA_37CD,
CANDELA_39CD,
CANDELA_41CD,
CANDELA_44CD,
CANDELA_47CD,
CANDELA_50CD,
CANDELA_53CD,
CANDELA_56CD,
CANDELA_60CD,
CANDELA_64CD,
CANDELA_68CD,
CANDELA_72CD,
CANDELA_77CD,
CANDELA_82CD,
CANDELA_87CD,
CANDELA_93CD,
CANDELA_98CD,
CANDELA_105CD,
CANDELA_111CD,
CANDELA_119CD,
CANDELA_126CD,
CANDELA_134CD,
CANDELA_143CD,
CANDELA_152CD,
CANDELA_162CD,
CANDELA_172CD,
CANDELA_183CD,
CANDELA_195CD,
CANDELA_207CD,
CANDELA_220CD,
CANDELA_234CD,
CANDELA_249CD,
CANDELA_265CD,
CANDELA_282CD,
CANDELA_300CD, /* 53 */
};
static const int s6e88a0_ams427ap24_br_to_cd[NUM_STEPS_CANDELA] = {
/* columns: brightness from, brightness till, candela */
/* 0 */ 10, /* 10CD */
/* 11 */ 11, /* 11CD */
/* 12 */ 12, /* 12CD */
/* 13 */ 13, /* 13CD */
/* 14 */ 14, /* 14CD */
/* 15 */ 15, /* 15CD */
/* 16 */ 16, /* 16CD */
/* 17 */ 17, /* 17CD */
/* 18 */ 18, /* 19CD */
/* 19 */ 19, /* 20CD */
/* 20 */ 20, /* 21CD */
/* 21 */ 21, /* 22CD */
/* 22 */ 22, /* 24CD */
/* 23 */ 23, /* 25CD */
/* 24 */ 24, /* 27CD */
/* 25 */ 25, /* 29CD */
/* 26 */ 26, /* 30CD */
/* 27 */ 27, /* 32CD */
/* 28 */ 28, /* 34CD */
/* 29 */ 29, /* 37CD */
/* 30 */ 30, /* 39CD */
/* 31 */ 32, /* 41CD */
/* 33 */ 34, /* 44CD */
/* 35 */ 36, /* 47CD */
/* 37 */ 38, /* 50CD */
/* 39 */ 40, /* 53CD */
/* 41 */ 43, /* 56CD */
/* 44 */ 46, /* 60CD */
/* 47 */ 49, /* 64CD */
/* 50 */ 52, /* 68CD */
/* 53 */ 56, /* 72CD */
/* 57 */ 59, /* 77CD */
/* 60 */ 63, /* 82CD */
/* 64 */ 67, /* 87CD */
/* 68 */ 71, /* 93CD */
/* 72 */ 76, /* 98CD */
/* 77 */ 80, /* 105CD */
/* 81 */ 86, /* 111CD */
/* 87 */ 91, /* 119CD */
/* 92 */ 97, /* 126CD */
/* 98 */ 104, /* 134CD */
/* 105 */ 110, /* 143CD */
/* 111 */ 118, /* 152CD */
/* 119 */ 125, /* 162CD */
/* 126 */ 133, /* 172CD */
/* 134 */ 142, /* 183CD */
/* 143 */ 150, /* 195CD */
/* 151 */ 160, /* 207CD */
/* 161 */ 170, /* 220CD */
/* 171 */ 181, /* 234CD */
/* 182 */ 205, /* 249CD */
/* 206 */ 234, /* 265CD */
/* 235 */ 254, /* 282CD */
/* 255 */ 255, /* 300CD */
};
static const u8 s6e88a0_ams427ap24_aid[NUM_STEPS_AID][VAR_LEN_AID] = {
{ 0x03, 0x77 }, /* AOR 90.9%, 10CD */
{ 0x03, 0x73 }, /* AOR 90.5%, 11CD */
{ 0x03, 0x69 }, /* AOR 89.4%, 12CD */
{ 0x03, 0x65 }, /* AOR 89.0%, 13CD */
{ 0x03, 0x61 }, /* AOR 88.6%, 14CD */
{ 0x03, 0x55 }, /* AOR 87.4%, 15CD */
{ 0x03, 0x50 }, /* AOR 86.9%, 16CD */
{ 0x03, 0x45 }, /* AOR 85.8%, 17CD */
{ 0x03, 0x35 }, /* AOR 84.1%, 19CD */
{ 0x03, 0x27 }, /* AOR 82.7%, 20CD */
{ 0x03, 0x23 }, /* AOR 82.3%, 21CD */
{ 0x03, 0x17 }, /* AOR 81.0%, 22CD */
{ 0x03, 0x11 }, /* AOR 80.4%, 24CD */
{ 0x03, 0x04 }, /* AOR 79.1%, 25CD */
{ 0x02, 0xf4 }, /* AOR 77.5%, 27CD */
{ 0x02, 0xe3 }, /* AOR 75.7%, 29CD */
{ 0x02, 0xd7 }, /* AOR 74.5%, 30CD */
{ 0x02, 0xc6 }, /* AOR 72.7%, 32CD */
{ 0x02, 0xb7 }, /* AOR 71.2%, 34CD */
{ 0x02, 0xa1 }, /* AOR 69.0%, 37CD */
{ 0x02, 0x91 }, /* AOR 67.3%, 39CD */
{ 0x02, 0x78 }, /* AOR 64.8%, 41CD */
{ 0x02, 0x62 }, /* AOR 62.5%, 44CD */
{ 0x02, 0x45 }, /* AOR 59.5%, 47CD */
{ 0x02, 0x30 }, /* AOR 57.4%, 50CD */
{ 0x02, 0x13 }, /* AOR 54.4%, 53CD */
{ 0x01, 0xf5 }, /* AOR 51.3%, 56CD */
{ 0x01, 0xd3 }, /* AOR 47.8%, 60CD */
{ 0x01, 0xb1 }, /* AOR 44.4%, 64CD */
{ 0x01, 0x87 }, /* AOR 40.1%, 68CD */
{ 0x01, 0x63 }, /* AOR 36.6%, 72CD */
{ 0x01, 0x35 }, /* AOR 31.7%, 77CD */
{ 0x01, 0x05 }, /* AOR 26.9%, 82CD */
{ 0x00, 0xd5 }, /* AOR 21.8%, 87CD */
{ 0x00, 0xa1 }, /* AOR 16.5%, 93CD */
{ 0x00, 0x6f }, /* AOR 11.4%, 98CD */
{ 0x00, 0x31 }, /* AOR 5.0%, 105CD */
{ 0x01, 0x86 }, /* AOR 40.0%, 111CD ~ 172CD */
{ 0x00, 0x08 }, /* AOR 0.6%, 183CD ~ 300CD */
};
static const u8 s6e88a0_ams427ap24_elvss[NUM_STEPS_ELVSS][VAR_LEN_ELVSS] = {
{ 0x14 }, /* 10CD ~ 111CD */
{ 0x13 }, /* 119CD */
{ 0x12 }, /* 126CD */
{ 0x12 }, /* 134CD */
{ 0x11 }, /* 143CD */
{ 0x10 }, /* 152CD */
{ 0x0f }, /* 162CD */
{ 0x0e }, /* 172CD */
{ 0x11 }, /* 183CD */
{ 0x11 }, /* 195CD */
{ 0x10 }, /* 207CD */
{ 0x0f }, /* 220CD */
{ 0x0f }, /* 234CD */
{ 0x0e }, /* 249CD */
{ 0x0d }, /* 265CD */
{ 0x0c }, /* 282CD */
{ 0x0b }, /* 300CD */
};
static const u8 s6e88a0_ams427ap24_gamma[NUM_STEPS_CANDELA][VAR_LEN_GAMMA] = {
/* 10CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x8a, 0x8c, 0x8b,
0x8c, 0x87, 0x89, 0x89, 0x88, 0x87, 0x8c, 0x80, 0x82, 0x88, 0x7b,
0x72, 0x8c, 0x60, 0x68, 0x8c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
/* 11CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x8a, 0x8c, 0x8b,
0x8c, 0x87, 0x89, 0x89, 0x88, 0x87, 0x8c, 0x80, 0x82, 0x88, 0x7b,
0x72, 0x8c, 0x60, 0x68, 0x8c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
/* 12CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x8a, 0x8b, 0x8b,
0x8c, 0x88, 0x89, 0x8a, 0x88, 0x87, 0x8c, 0x81, 0x82, 0x87, 0x7a,
0x72, 0x8b, 0x60, 0x68, 0x8c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
/* 13CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x8a, 0x8b, 0x8b,
0x8c, 0x88, 0x89, 0x8a, 0x88, 0x87, 0x8c, 0x81, 0x82, 0x87, 0x7a,
0x72, 0x8b, 0x61, 0x69, 0x8c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
/* 14CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8c, 0x8b,
0x8c, 0x88, 0x89, 0x8a, 0x87, 0x86, 0x8a, 0x82, 0x82, 0x87, 0x79,
0x71, 0x89, 0x63, 0x6c, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
/* 15CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x8a, 0x8c, 0x8c,
0x8c, 0x86, 0x87, 0x88, 0x85, 0x85, 0x8a, 0x83, 0x83, 0x88, 0x78,
0x72, 0x89, 0x64, 0x6c, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
/* 16CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8c, 0x8b,
0x8c, 0x86, 0x88, 0x88, 0x86, 0x86, 0x8a, 0x84, 0x84, 0x88, 0x78,
0x72, 0x89, 0x5d, 0x67, 0x8b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
/* 17CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
0x8b, 0x87, 0x89, 0x89, 0x86, 0x86, 0x8a, 0x84, 0x83, 0x87, 0x78,
0x73, 0x89, 0x64, 0x6e, 0x8e, 0x38, 0x32, 0x24, 0x00, 0x00, 0x00 },
/* 19CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
0x8b, 0x87, 0x89, 0x89, 0x86, 0x86, 0x89, 0x84, 0x84, 0x87, 0x77,
0x72, 0x88, 0x65, 0x6f, 0x8e, 0x38, 0x32, 0x24, 0x00, 0x00, 0x00 },
/* 20CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
0x8b, 0x88, 0x89, 0x89, 0x85, 0x85, 0x88, 0x82, 0x83, 0x85, 0x79,
0x73, 0x88, 0x65, 0x6f, 0x8e, 0x38, 0x32, 0x24, 0x00, 0x00, 0x00 },
/* 21CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
0x8b, 0x88, 0x89, 0x89, 0x85, 0x85, 0x88, 0x82, 0x83, 0x85, 0x79,
0x74, 0x88, 0x65, 0x6f, 0x8e, 0x38, 0x32, 0x24, 0x00, 0x00, 0x00 },
/* 22CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8c, 0x8b,
0x8c, 0x86, 0x88, 0x87, 0x86, 0x86, 0x89, 0x82, 0x83, 0x85, 0x7c,
0x75, 0x87, 0x65, 0x6f, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
/* 24CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8c, 0x8b,
0x8c, 0x86, 0x88, 0x87, 0x86, 0x86, 0x89, 0x82, 0x83, 0x85, 0x7c,
0x76, 0x86, 0x66, 0x6f, 0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
/* 25CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
0x8b, 0x86, 0x89, 0x88, 0x87, 0x87, 0x89, 0x82, 0x82, 0x84, 0x7f,
0x7a, 0x89, 0x6b, 0x73, 0x8f, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
/* 27CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
0x8b, 0x86, 0x89, 0x88, 0x87, 0x87, 0x89, 0x82, 0x82, 0x84, 0x7f,
0x7a, 0x89, 0x6b, 0x73, 0x8f, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
/* 29CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
0x8b, 0x86, 0x89, 0x88, 0x85, 0x84, 0x87, 0x84, 0x85, 0x86, 0x80,
0x7b, 0x88, 0x6a, 0x73, 0x8f, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
/* 30CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
0x8b, 0x86, 0x89, 0x88, 0x85, 0x84, 0x87, 0x84, 0x85, 0x86, 0x80,
0x7b, 0x88, 0x6a, 0x73, 0x8f, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
/* 32CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
0x8b, 0x86, 0x89, 0x88, 0x85, 0x84, 0x87, 0x84, 0x85, 0x86, 0x80,
0x7b, 0x88, 0x6a, 0x73, 0x8f, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
/* 34CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8c, 0x8a, 0x89, 0x8b, 0x8b,
0x8b, 0x86, 0x89, 0x88, 0x85, 0x84, 0x87, 0x83, 0x84, 0x84, 0x7f,
0x79, 0x86, 0x6c, 0x76, 0x91, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
/* 37CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8b,
0x8b, 0x86, 0x88, 0x88, 0x87, 0x86, 0x87, 0x83, 0x84, 0x84, 0x7f,
0x79, 0x86, 0x6c, 0x76, 0x90, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
/* 39CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8b,
0x8b, 0x86, 0x88, 0x87, 0x84, 0x84, 0x86, 0x83, 0x85, 0x85, 0x80,
0x79, 0x85, 0x6c, 0x76, 0x90, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
/* 41CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8b,
0x8b, 0x86, 0x88, 0x87, 0x84, 0x84, 0x86, 0x81, 0x84, 0x83, 0x7f,
0x79, 0x84, 0x6e, 0x79, 0x93, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
/* 44CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8b,
0x8b, 0x86, 0x88, 0x87, 0x84, 0x84, 0x86, 0x81, 0x84, 0x83, 0x7f,
0x79, 0x84, 0x6e, 0x79, 0x92, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
/* 47CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8b,
0x8b, 0x86, 0x88, 0x87, 0x84, 0x85, 0x86, 0x81, 0x84, 0x83, 0x7f,
0x79, 0x83, 0x6f, 0x79, 0x91, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
/* 50CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8b,
0x8b, 0x86, 0x88, 0x87, 0x84, 0x85, 0x86, 0x82, 0x84, 0x83, 0x7f,
0x79, 0x83, 0x6f, 0x79, 0x90, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
/* 53CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8b,
0x8b, 0x86, 0x88, 0x87, 0x83, 0x83, 0x85, 0x84, 0x85, 0x85, 0x7f,
0x79, 0x83, 0x70, 0x79, 0x8f, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
/* 56CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8a,
0x8a, 0x87, 0x89, 0x87, 0x83, 0x83, 0x85, 0x84, 0x85, 0x84, 0x7f,
0x79, 0x82, 0x70, 0x7a, 0x8e, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
/* 60CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8a,
0x8a, 0x87, 0x89, 0x87, 0x83, 0x83, 0x85, 0x84, 0x85, 0x84, 0x7e,
0x79, 0x82, 0x71, 0x7a, 0x8d, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
/* 64CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8b, 0x89, 0x89, 0x8b, 0x8a,
0x8a, 0x86, 0x88, 0x86, 0x84, 0x84, 0x86, 0x82, 0x83, 0x82, 0x80,
0x7a, 0x84, 0x71, 0x7a, 0x8c, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
/* 68CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8a, 0x89, 0x89, 0x8c, 0x8a,
0x8a, 0x86, 0x88, 0x86, 0x84, 0x84, 0x86, 0x82, 0x84, 0x82, 0x81,
0x7b, 0x83, 0x72, 0x7b, 0x8b, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
/* 72CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8a, 0x89, 0x89, 0x8c, 0x8a,
0x8a, 0x86, 0x88, 0x86, 0x85, 0x85, 0x86, 0x82, 0x84, 0x82, 0x81,
0x7b, 0x83, 0x72, 0x7c, 0x8a, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
/* 77CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8a, 0x89, 0x89, 0x8c, 0x8a,
0x8a, 0x85, 0x87, 0x85, 0x85, 0x87, 0x87, 0x82, 0x84, 0x82, 0x81,
0x7c, 0x82, 0x72, 0x7c, 0x89, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
/* 82CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8a, 0x89, 0x89, 0x8c, 0x8a,
0x8a, 0x85, 0x87, 0x85, 0x85, 0x87, 0x87, 0x82, 0x84, 0x82, 0x81,
0x7c, 0x82, 0x73, 0x7c, 0x88, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
/* 87CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8a, 0x89, 0x89, 0x8c, 0x8a,
0x8a, 0x85, 0x87, 0x85, 0x84, 0x84, 0x86, 0x80, 0x84, 0x81, 0x80,
0x7a, 0x82, 0x76, 0x7f, 0x89, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
/* 93CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8a, 0x89, 0x89, 0x8b, 0x8a,
0x8a, 0x86, 0x87, 0x85, 0x84, 0x85, 0x86, 0x80, 0x84, 0x80, 0x80,
0x7a, 0x82, 0x76, 0x80, 0x88, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
/* 98CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x8a, 0x89, 0x89, 0x8b, 0x8a,
0x8a, 0x86, 0x87, 0x85, 0x85, 0x85, 0x86, 0x80, 0x84, 0x80, 0x80,
0x7a, 0x82, 0x76, 0x80, 0x88, 0x33, 0x2f, 0x22, 0x00, 0x00, 0x00 },
/* 105CD */
{ 0x00, 0xc8, 0x00, 0xc4, 0x00, 0xc5, 0x89, 0x88, 0x88, 0x8b, 0x8a,
0x8a, 0x84, 0x87, 0x85, 0x85, 0x85, 0x85, 0x80, 0x84, 0x80, 0x7f,
0x79, 0x81, 0x71, 0x7d, 0x87, 0x38, 0x32, 0x24, 0x00, 0x00, 0x00 },
/* 111CD */
{ 0x00, 0xdf, 0x00, 0xde, 0x00, 0xde, 0x85, 0x85, 0x84, 0x87, 0x86,
0x87, 0x85, 0x86, 0x85, 0x83, 0x83, 0x83, 0x81, 0x82, 0x82, 0x80,
0x7d, 0x82, 0x75, 0x7f, 0x86, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
/* 119CD */
{ 0x00, 0xe3, 0x00, 0xe1, 0x00, 0xe2, 0x85, 0x85, 0x84, 0x86, 0x85,
0x85, 0x84, 0x85, 0x84, 0x83, 0x83, 0x83, 0x82, 0x82, 0x82, 0x7e,
0x7b, 0x81, 0x75, 0x7f, 0x86, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
/* 126CD */
{ 0x00, 0xe6, 0x00, 0xe5, 0x00, 0xe5, 0x85, 0x84, 0x84, 0x85, 0x85,
0x85, 0x84, 0x84, 0x84, 0x82, 0x83, 0x83, 0x80, 0x81, 0x81, 0x80,
0x7f, 0x83, 0x73, 0x7c, 0x84, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
/* 134CD */
{ 0x00, 0xe9, 0x00, 0xe8, 0x00, 0xe8, 0x84, 0x84, 0x83, 0x85, 0x85,
0x85, 0x84, 0x84, 0x83, 0x81, 0x82, 0x82, 0x81, 0x81, 0x81, 0x7f,
0x7d, 0x81, 0x73, 0x7c, 0x83, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
/* 143CD */
{ 0x00, 0xed, 0x00, 0xec, 0x00, 0xec, 0x84, 0x83, 0x83, 0x84, 0x84,
0x84, 0x84, 0x84, 0x83, 0x82, 0x83, 0x83, 0x81, 0x80, 0x81, 0x7f,
0x7e, 0x81, 0x70, 0x79, 0x81, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
/* 152CD */
{ 0x00, 0xf0, 0x00, 0xf0, 0x00, 0xf0, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x84, 0x84, 0x83, 0x81, 0x81, 0x81, 0x80, 0x80, 0x81, 0x80,
0x80, 0x82, 0x6f, 0x78, 0x7f, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
/* 162CD */
{ 0x00, 0xf4, 0x00, 0xf3, 0x00, 0xf4, 0x83, 0x83, 0x83, 0x83, 0x83,
0x83, 0x82, 0x81, 0x81, 0x81, 0x81, 0x81, 0x80, 0x80, 0x81, 0x80,
0x7f, 0x82, 0x6f, 0x78, 0x7f, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
/* 172CD */
{ 0x00, 0xf8, 0x00, 0xf8, 0x00, 0xf8, 0x82, 0x82, 0x82, 0x82, 0x82,
0x82, 0x82, 0x81, 0x81, 0x80, 0x81, 0x80, 0x80, 0x80, 0x81, 0x81,
0x80, 0x83, 0x6d, 0x76, 0x7d, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
/* 183CD */
{ 0x00, 0xe0, 0x00, 0xdf, 0x00, 0xdf, 0x84, 0x84, 0x83, 0x86, 0x86,
0x86, 0x83, 0x84, 0x83, 0x82, 0x82, 0x82, 0x81, 0x83, 0x81, 0x81,
0x7e, 0x81, 0x80, 0x82, 0x84, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
/* 195CD */
{ 0x00, 0xe4, 0x00, 0xe3, 0x00, 0xe3, 0x84, 0x83, 0x83, 0x85, 0x85,
0x85, 0x83, 0x84, 0x83, 0x81, 0x82, 0x82, 0x82, 0x83, 0x81, 0x81,
0x80, 0x82, 0x7d, 0x7f, 0x81, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
/* 207CD */
{ 0x00, 0xe7, 0x00, 0xe6, 0x00, 0xe6, 0x83, 0x82, 0x82, 0x85, 0x85,
0x85, 0x82, 0x83, 0x83, 0x82, 0x82, 0x82, 0x80, 0x81, 0x80, 0x81,
0x80, 0x82, 0x7d, 0x7f, 0x81, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
/* 220CD */
{ 0x00, 0xeb, 0x00, 0xea, 0x00, 0xea, 0x83, 0x83, 0x82, 0x84, 0x84,
0x84, 0x82, 0x83, 0x82, 0x81, 0x81, 0x82, 0x81, 0x82, 0x81, 0x80,
0x7e, 0x80, 0x7d, 0x7f, 0x81, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
/* 234CD */
{ 0x00, 0xef, 0x00, 0xee, 0x00, 0xee, 0x83, 0x82, 0x82, 0x83, 0x83,
0x83, 0x82, 0x82, 0x82, 0x81, 0x81, 0x81, 0x80, 0x80, 0x80, 0x80,
0x80, 0x81, 0x7b, 0x7c, 0x7f, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
/* 249CD */
{ 0x00, 0xf3, 0x00, 0xf2, 0x00, 0xf2, 0x82, 0x81, 0x81, 0x83, 0x83,
0x83, 0x82, 0x82, 0x82, 0x81, 0x81, 0x81, 0x80, 0x81, 0x80, 0x7f,
0x7e, 0x7f, 0x7b, 0x7c, 0x7f, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
/* 265CD */
{ 0x00, 0xf7, 0x00, 0xf7, 0x00, 0xf7, 0x81, 0x81, 0x80, 0x82, 0x82,
0x82, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x81, 0x80, 0x7f,
0x7e, 0x7f, 0x7b, 0x7c, 0x7f, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
/* 282CD */
{ 0x00, 0xfb, 0x00, 0xfb, 0x00, 0xfb, 0x80, 0x80, 0x80, 0x81, 0x81,
0x81, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x7f, 0x7f, 0x7f, 0x7f,
0x7f, 0x7f, 0x78, 0x79, 0x7d, 0x85, 0x85, 0x82, 0x00, 0x00, 0x00 },
/* 300CD */
{ 0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00 },
};
static int s6e88a0_ams427ap24_set_brightness(struct backlight_device *bd)
{
struct s6e88a0_ams427ap24 *ctx = bl_get_data(bd);
struct mipi_dsi_device *dsi = ctx->dsi;
struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
struct device *dev = &dsi->dev;
int brightness = bd->props.brightness;
int candela_enum;
u8 b2[LEN_AID] = { 0xb2, 0x40, 0x08, 0x20, 0x00, 0x00 };
u8 b6[LEN_ELVSS] = { 0xb6, 0x28, 0x00 };
u8 ca[LEN_GAMMA];
/* get candela enum from brightness */
for (candela_enum = 0; candela_enum < NUM_STEPS_CANDELA; candela_enum++)
if (brightness <= s6e88a0_ams427ap24_br_to_cd[candela_enum])
break;
/* get aid */
switch (candela_enum) {
case CANDELA_10CD ... CANDELA_105CD:
memcpy(&b2[FIX_LEN_AID],
s6e88a0_ams427ap24_aid[candela_enum],
VAR_LEN_AID);
break;
case CANDELA_111CD ... CANDELA_172CD:
memcpy(&b2[FIX_LEN_AID],
s6e88a0_ams427ap24_aid[CANDELA_111CD],
VAR_LEN_AID);
break;
case CANDELA_183CD ... CANDELA_300CD:
memcpy(&b2[FIX_LEN_AID],
s6e88a0_ams427ap24_aid[CANDELA_111CD + 1],
VAR_LEN_AID);
break;
default:
dev_err(dev, "Failed to get aid data\n");
return -EINVAL;
}
/* get elvss */
if (candela_enum <= CANDELA_111CD) {
memcpy(&b6[FIX_LEN_ELVSS],
s6e88a0_ams427ap24_elvss[0],
VAR_LEN_ELVSS);
} else {
memcpy(&b6[FIX_LEN_ELVSS],
s6e88a0_ams427ap24_elvss[candela_enum - CANDELA_111CD],
VAR_LEN_ELVSS);
}
/* get gamma */
ca[0] = 0xca;
memcpy(&ca[FIX_LEN_GAMMA],
s6e88a0_ams427ap24_gamma[candela_enum],
VAR_LEN_GAMMA);
/* write data */
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0x5a, 0x5a); // level 1 key on
mipi_dsi_dcs_write_buffer_multi(&dsi_ctx, b2, ARRAY_SIZE(b2)); // set aid
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x55, 0x00); // acl off
mipi_dsi_dcs_write_buffer_multi(&dsi_ctx, b6, ARRAY_SIZE(b6)); // set elvss
mipi_dsi_dcs_write_buffer_multi(&dsi_ctx, ca, ARRAY_SIZE(ca)); // set gamma
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf7, 0x03); // gamma update
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0xa5, 0xa5); // level 1 key off
return dsi_ctx.accum_err;
}
static void s6e88a0_ams427ap24_reset(struct s6e88a0_ams427ap24 *ctx)
{
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
@ -48,6 +529,8 @@ static int s6e88a0_ams427ap24_on(struct s6e88a0_ams427ap24 *ctx)
{
struct mipi_dsi_device *dsi = ctx->dsi;
struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
struct device *dev = &dsi->dev;
int ret;
dsi->mode_flags |= MIPI_DSI_MODE_LPM;
@ -67,20 +550,15 @@ static int s6e88a0_ams427ap24_on(struct s6e88a0_ams427ap24 *ctx)
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xcc, 0x4c); // pixel clock divider pol.
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf2, 0x03, 0x0d); // unknown
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf1, 0xa5, 0xa5); // level 3 key off
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xca,
0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x00, 0x00, 0x00); // set gamma
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb2,
0x40, 0x08, 0x20, 0x00, 0x08); // set aid
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb6, 0x28, 0x0b); // set elvss
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf7, 0x03); // gamma update
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x55, 0x00); // acl off
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0xa5, 0xa5); // level 1 key off
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xfc, 0xa5, 0xa5); // level 2 key off
ret = s6e88a0_ams427ap24_set_brightness(ctx->bl_dev);
if (ret < 0) {
dev_err(dev, "Failed to set brightness: %d\n", ret);
return ret;
}
mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
return dsi_ctx.accum_err;
@ -172,6 +650,32 @@ static const struct drm_panel_funcs s6e88a0_ams427ap24_panel_funcs = {
.get_modes = s6e88a0_ams427ap24_get_modes,
};
static const struct backlight_ops s6e88a0_ams427ap24_bl_ops = {
.update_status = s6e88a0_ams427ap24_set_brightness,
};
static int s6e88a0_ams427ap24_register_backlight(struct s6e88a0_ams427ap24 *ctx)
{
struct backlight_properties props = {
.type = BACKLIGHT_RAW,
.brightness = 180,
.max_brightness = 255,
};
struct mipi_dsi_device *dsi = ctx->dsi;
struct device *dev = &dsi->dev;
int ret = 0;
ctx->bl_dev = devm_backlight_device_register(dev, dev_name(dev), dev, ctx,
&s6e88a0_ams427ap24_bl_ops,
&props);
if (IS_ERR(ctx->bl_dev)) {
ret = PTR_ERR(ctx->bl_dev);
dev_err(dev, "error registering backlight device (%d)\n", ret);
}
return ret;
}
static int s6e88a0_ams427ap24_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
@ -200,12 +704,16 @@ static int s6e88a0_ams427ap24_probe(struct mipi_dsi_device *dsi)
dsi->lanes = 2;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
MIPI_DSI_MODE_NO_EOT_PACKET;
MIPI_DSI_MODE_NO_EOT_PACKET | MIPI_DSI_MODE_VIDEO_NO_HFP;
drm_panel_init(&ctx->panel, dev, &s6e88a0_ams427ap24_panel_funcs,
DRM_MODE_CONNECTOR_DSI);
ctx->panel.prepare_prev_first = true;
ret = s6e88a0_ams427ap24_register_backlight(ctx);
if (ret < 0)
return ret;
drm_panel_add(&ctx->panel);
ret = mipi_dsi_attach(dsi);