Manuals+

Quectel SC668S Series Display Driver Development Guide

Smart Module Series

Version: 1.0

Date: 2023-04-23

Version: Released

About the Document

Revision History

Version Date Author Description
- 2022-04-18 Hbingo HUANG Creation of the Document
1.0 2023-04-23 Hbingo HUANG/ Aivin XU First official release

Contents

1. Introduction

This document introduces how to use the Display Serial Interface (DSI) to bring up the LCD display panel of Quectel SC668S series module on Android platform, including important parameters of panel configuration files and the configuration steps in Kernel and UEFI.

NOTE:

  1. In this document, LCD HX8394F on the EVB corresponding to the module is used as an example to outline the development flow of LCD display driver.
  2. This document only describes important user configurations during LCD display driver development.
  3. This document is applicable to multiple Android versions, and the kernel path can be divided into two paths: kernel\msm-4.14 (For Android 10 and Android 11) and UM.x.xx\kernel\msm-4.14 (For Android 12 or above). You need to select the corresponding path according to the specific Android version.

2. Panel Configuration File Modification

This chapter describes the panel configuration files introduced:

The two files are located in the kernel\msm-4.14\arch\arm64\boot\dts\qcom\ directory. You can configure the required LCD by copying the default panel configuration files of the module and then modifying the corresponding MIPI parameters.

NOTE: This chapter only introduces important parameters that may be modified by users. Parameters not mentioned herein usually do not need to be modified.

2.1. Configure Panel Information

You can configure the panel information as required. Here is an example:

&mdss_mdp {
 dsi_hx8394f_720p_video: qcom,mdss_dsi_hx8394f_720p_video {
 qcom,mdss-dsi-panel-name = "hx8394f video mode dsi panel without DSC";
 qcom,mdss-dsi-panel-type = "dsi_video_mode";
 qcom,mdss-dsi-virtual-channel-id = <0>;
 qcom,mdss-dsi-stream = <0>;
 qcom,mdss-dsi-h-left-border = <0>;
 qcom,mdss-dsi-h-right-border = <0>;
 qcom,mdss-dsi-v-top-border = <0>;
 qcom,mdss-dsi-v-bottom-border = <0>;
 qcom,mdss-dsi-bpp = <24>;
 qcom,mdss-dsi-color-order = "rgb_swap_rgb";
 qcom,mdss-dsi-underflow-color = <0xff>;
 qcom,mdss-dsi-border-color = <0>;
 };
}
Table 1: Panel Configuration Parameters
Parameter Description Value
mdss-dsi-panel-name Panel name Panel name/configuration file value
mdss-dsi-panel-type Panel type "dsi_video_mode"
"dsi_cmd_mode"		 Video mode
Command mode

2.2. Configure Panel Resolution

You can configure panel resolution as required. Here is an example:

qcom,mdss-dsi-display-timings {
 timing@0{
 qcom,mdss-dsi-panel-width = <720>;
 qcom,mdss-dsi-panel-height = <1280>;
 qcom,mdss-dsi-h-front-porch = <50>;
 qcom,mdss-dsi-h-back-porch = <50>;
 qcom,mdss-dsi-h-pulse-width = <50>;
 qcom,mdss-dsi-h-sync-skew = <0>;
 qcom,mdss-dsi-v-back-porch = <4>;
 qcom,mdss-dsi-v-front-porch = <10>;
 qcom,mdss-dsi-v-pulse-width = <4>;
 qcom,mdss-dsi-panel-framerate = <60>;
 qcom,mdss-dsi-on-command = [
 ];
 }
Table 2: Panel Resolution Configuration Parameters
Parameter Description
mdss-dsi-panel-width Panel width (pixel)
mdss-dsi-panel-height Panel height (pixel)
mdss-dsi-h-front-porch Horizontal front porch value
mdss-dsi-h-back-porch Horizontal back porch value
mdss-dsi-h-pulse-width Horizontal pulse width
mdss-dsi-h-sync-skew Horizontal sync skew value
mdss-dsi-v-back-porch Vertical back porch value
mdss-dsi-v-front-porch Vertical front porch value
mdss-dsi-v-pulse-width Vertical pulse width
mdss-dsi-panel-framerate Panel framerate, which is the number of frames refreshed on panel per second

2.3. Configure Panel Color Information

You can configure panel color information as required. Here is an example:

qcom,mdss-dsi-bpp = <24>;
qcom,mdss-dsi-color-order = "rgb_swap_rgb";
qcom,mdss-dsi-underflow-color = <0xff>;
qcom,mdss-dsi-border-color = <0>;
Table 3: Panel Color Configuration Parameters
Parameter Description Value
mdss-dsi-bpp Defines the number of bits per pixel 24 888_RGB
18 666_RGB
16 565_RGB
12 444_RGB
8 332_RGB
3 111_RGB
mdss-dsi-color-order Specifies the R, G, B channel order "rgb_swap_rgb"
"rgb_swap_rbg"
"rgb_swap_brg"
"rgb_swap_grb"
"rgb_swap_gbr"

2.4. Configure Panel Command Information

You can configure panel command information (for LCD initialization) as required. The information is provided by LCD module manufacturer. Here is an example:

qcom,mdss-dsi-on-command = [
 29 01 00 00 00 00 04 B9 FF 83 94
 29 01 00 00 00 00 07 BA 63 03 68 6b b2 c0
 29 01 00 00 00 00 0B B1 50 12 72 09 33 54 B1 31 6B 2F
 29 01 00 00 00 00 07 B2 00 80 64 0e 0d 2f
 29 01 00 00 00 00 16 B4 73 74 73 74 73 74 01 OC 86 75 00 3F 73 74 73 74 73 74 01 OC 86
 29 01 00 00 00 00 22 D3 00 00 07 07 40 07 10 00 08 10 08 00 08 54 15 0e 05 0e 02 15 06 05 06 47 44 0a 0a 4b 10 07 07
 29 01 00 00 00 00 2D D5 1a 1a 1b 1b 00 01 02 03 04 05 06 07 08 09 0a 0b 24 25 18 18 26 27 18 18 18 18 18 18 18 18 18
 29 01 00 00 00 00 2D D6 1a 1a 1b 1b 0b 0a 09 08 07 06 05 04 03 02 01 00 21 20 18 18 27 26 18 18 18 18 18 18 18 18 18
 29 01 00 00 00 00 3B E0 00 OD 1B 22 25 2A 2F 2C 5A 6B 7A 77 7E 8E 92 95 9F 9E 99 a1 b0 57 55 5c 5F 5F 67 6F 7f 00 OD
 29 01 00 00 00 00 03 C0 1f 31
 29 01 00 00 00 00 02 CC OB
 29 01 00 00 00 00 03 B6 78 78
 29 01 00 00 00 00 02 D4 02
 29 01 00 00 00 00 02 BD 02
 29 01 00 00 00 00 0D D8 FF FF FF FF FF FF FF FF FF FF FF FF
 29 01 00 00 00 00 02 BD 00
 29 01 00 00 00 00 02 BD 01
 29 01 00 00 00 00 02 B1 00
 29 01 00 00 00 00 02 BD 00
 29 01 00 00 00 00 08 BF 40 81 50 00 1A FC 01
 05 01 00 00 78 00 02 11 00
 05 01 00 00 05 00 02 29 00
];
qcom,mdss-dsi-off-command = [
 05 01 00 00 14 00 02 28 00
 05 01 00 00 78 00 02 10 00
];
Table 4: Configuration Parameters of Panel Command Information
Parameter Description
mdss-dsi-on-command Array of variable length that lists the initialization commands of the panel
mdss-dsi-off-command Array of variable length that lists the de-initialization commands of the panel

2.4.1. Command Format

Usually, only PayloadSize and Payload in the command need to be modified, but sometimes Wait also needs to be modified. See the requirements of initialization commands provided by the LCD module manufacturer for details. The parameter information is described as below:

qcom,mdss-dsi-on-command = [
 29 01 00 00 00 00 04 B9 FF 83 94
 29 01 00 00 00 00 07 BA 63 03 68 6b b2 c0
 29 01 00 00 00 00 0B B1 50 12 72 09 33 54 B1 31 6B 2F
 29 01 00 00 00 00 07 B2 00 80 64 0e 0d 2f
 29 01 00 00 00 00 16 B4 73 74 73 74 73 74 01 OC 86 75 00 3F 73 74 73 74 73 74 01 OC 86
 29 01 00 00 00 00 22 D3 00 00 07 07 40 07 10 00 08 10 08 00 08 54 15 0e 05 0e 02 15 06 05 06 47 44 0a 0a 4b 10 07 07
 29 01 00 00 00 00 2D D5 1a 1a 1b 1b 00 01 02 03 04 05 06 07 08 09 0a 0b 24 25 18 18 26 27 18 18 18 18 18 18 18 18 18
 29 01 00 00 00 00 2D D6 1a 1a 1b 1b 0b 0a 09 08 07 06 05 04 03 02 01 00 21 20 18 18 27 26 18 18 18 18 18 18 18 18 18
 29 01 00 00 00 00 3B E0 00 OD 1B 22 25 2A 2F 2C 5A 6B 7A 77 7E 8E 92 95 9F 9E 99 a1 b0 57 55 5c 5F 5F 67 6F 7f 00 OD
 29 01 00 00 00 00 03 C0 1f 31
 29 01 00 00 00 00 02 CC OB
 29 01 00 00 00 00 03 B6 78 78
 29 01 00 00 00 00 02 D4 02
 29 01 00 00 00 00 02 BD 02
 29 01 00 00 00 00 0D D8 FF FF FF FF FF FF FF FF FF FF FF FF
 29 01 00 00 00 00 02 BD 00
 29 01 00 00 00 00 02 BD 01
 29 01 00 00 00 00 02 B1 00
 29 01 00 00 00 00 02 BD 00
 29 01 00 00 00 00 08 BF 40 81 50 00 1A FC 01
 05 01 00 00 78 00 02 11 00
 05 01 00 00 05 00 02 29 00
];
qcom,mdss-dsi-off-command = [
 05 01 00 00 14 00 02 28 00
 05 01 00 00 78 00 02 10 00
];
qcom,mdss-dsi-on-command-state = "dsi_lp_mode";
qcom,mdss-dsi-off-command-state = "dsi_hs_mode";
Table 5: Command Format
Parameter Description Length
CommandType Data type of command 1
Last Specifies whether this command packet is an individual command 1
VC Virtual channel used to send this command 1
Ack Indicates whether acknowledgement from the panel is needed 1
Wait Waiting time in milliseconds before sending next command 1
PayloadSize Payload size 2
Payload Payload Based on PayloadSize

Payload is generally provided by the LCD module manufacturer.

Payload provided by LCD module manufacturer in the following format are preferable:

CMD(Hex),Number(Hex),DATA(Hex),DATA(Hex),...

When Payload is provided in the above format, mdss-dsi-on-command will be in the following format:

Register = 29 01 00 00 (A collection of CommandType, Last, VC and Ack)
Wait (Unit: ms. The value is provided by LCD module manufacturer)
PayloadSize = Number+1
Payload = CMD DATA DATA

For example, if Payload provided by LCD module manufacturer is:

B9,3,FF,83,94
BA,6,63,3,68,6B,B2,C0

mdss-dsi-on-command will be configured as:

29 01 00 00 00 00 04 B9 FF 83 94
29 01 00 00 00 00 07 BA 63 03 68 6B B2 CO

Usually, the last two commands of mdss-dsi-on-command are given as below, where 11 means LCD exiting sleep (sleep out) and 29 means turning on LCD (display on).

05 01 00 00 78 00 02 11 00
05 01 00 00 05 00 02 29 00

NOTE: You can delete the above two commands if they are not needed for the LCD module used. For specific usage conditions of the commands, see LCD module hardware design or contact the corresponding LCD module manufacturer.

2.5. Configure Video Mode Panel

Usually, parameters for video mode panel do not need to be modified, except for mdss-dsi-traffic-mode since it may vary with LCD chip. Here is an example:

qcom,mdss-dsi-traffic-mode = "non_burst_sync_event";
Table 6: Configuration Parameters of Video Mode Panel
Parameter Description Value
mdss-dsi-traffic-mode MIPI transmission mode "non_burst_sync_pulse" Non-burst with synchronization pulse
"non_burst_sync_event" Non-burst with synchronization start event
"burst_mode" Burst mode

2.6. Configure Data Lane

You can configure data lane as required. The following is a configuration example when 4 data lanes are enabled. If one of the data lanes is disabled, then you do not need to configure the corresponding lane number. Please see the corresponding LCD module hardware design for details.

qcom,mdss-dsi-lane-0-state;
qcom,mdss-dsi-lane-1-state;
qcom,mdss-dsi-lane-2-state;
qcom,mdss-dsi-lane-3-state;
Table 7: Configuration Parameters of Data Lane
Parameter Description
mdss-dsi-lane-0-state Enable lane 0
mdss-dsi-lane-1-state Enable lane 1
mdss-dsi-lane-2-state Enable lane 2
mdss-dsi-lane-3-state Enable lane 3

2.7. Configure DSI Timings

You can configure DSI timing sequence of the panel according to your needs. Here is an example:

&dsi_hx8394f_720p_video {
 qcom,mdss-dsi-t-clk-post = <0x0a>;
 qcom,mdss-dsi-t-clk-pre = <0x1c>;
 qcom, dsi-supported-dfps-list = <60 55 53 43>;
 qcom,mdss-dsi-pan-enable-dynamic-fps;
 qcom,mdss-dsi-pan-fps-update =
 "dfps_immediate_porch_mode_vfp";
 // qcom,esd-check-enabled;
 // qcom,mdss-dsi-panel-status-check-mode = "reg_read";
 // qcom,mdss-dsi-panel-status-command = [06 01 00 01 00 00 01 0a];
 // qcom,mdss-dsi-panel-status-command-state = "dsi_hs_mode";
 // qcom,mdss-dsi-panel-status-value = <0x9d 0x9d 0x9d 0x9d>;
 // qcom,mdss-dsi-panel-on-check-value = <0x9d 0x9d 0x9d 0x9d>;
 // qcom,mdss-dsi-panel-status-read-length = <4>;

 qcom,mdss-dsi-display-timings {
 timing@0{
 qcom,mdss-dsi-panel-phy-timings =
 [1E 1B 04 05 02 02 04 a0
 1E 1B 04 05 02 02 04 a0
 1E 1B 04 05 02 02 04 a0
 1E 1B 04 05 02 02 04 a0
 1E 0D 03 05 02 02 04 a0];
 qcom, display-topology = <1 0 1>;
 qcom, default-topology-index = <0>;
 }
}
Table 8: Configuration Parameters of DSI Timings
Parameter Description
mdss-dsi-t-clk-pre Pre-value of DSI timing control clock (generated according to the steps in Chapter 2.7.1)
mdss-dsi-t-clk-post Post value of DSI timing control clock (generated according to the steps in Chapter 2.7.1)
mdss-dsi-panel-phy-timings An array with a length of 40 bytes that specifies the physical timing settings (generated according to the steps in Chapter 2.7.1)

2.7.1. Generate DSI Timings

80-nh713-1_yb_dsi timing parameters user interactive spreadsheet.xlsm in 80-NH713-1_DSI.zip can be used to calculate the DSI timings values automatically. The detailed steps are as below:

NOTE:

  1. Please contact Quectel Technical Supports for obtaining 80-NH713-1_DSI.zip.
  2. Please use Microsoft Excel (Microsoft Excel 2016 is recommended) to open 80-nh713-1_yb_dsi timing parameters user interactive spreadsheet.xlsm. The use of other tools such as WPS is not supported.

Step 1: Open 80-nh713-1_yb_dsi timing parameters user interactive spreadsheet.xlsm and click "Enable Content", as shown in the figure below:

Figure 1: Click

Step 2: Open DSI and MDP Registers sheet. Input the values of frame rate, lane config, pixel format BPP, Active Width, Active Height, Porch and Chip to be configured to the specified area, as shown in the figure below:

Figure 2: DSI and MDP Registers Sheet

NOTE: If the LCD module manufacturer requires to change the Porch to be 4 or a multiple of 4. Please change it accordingly and also update the panel Porch node.

Step 3: Open DSI PHY Timing Setting sheet and press Ctrl + J at the same time to clear the previous timings data. Then press Ctrl + K simultaneously to regenerate timings data. After the operation is completed, the field Check for T_CLK_ZERO will be displayed as VALID, as shown below.

Figure 3: DSI PHY Timing Setting Sheet

Step 4: Open DSI PHY 2.0.0 Timing Setting sheet to check the calculated timings values.

Figure 4: Timing Values Generated in DSI PHY 2.0.0 Timing Setting sheet

Step 5: Update trinket-sde-display.dtsi of the corresponding LCD configuration node in the file kernel\msm-4.14\arch\arm64\boot\dts\qcom\ using the values generated in the sheet. For example, the module currently uses dsi_hx8394f_720p_video panel, so you should update mdss-dsi-panel-phy-timings of dsi_hx8394f_720p_video node with the values. The corresponding relationship is shown as below:

Figure 5: Update mdss-dsi-panel-phy-timings

Step 6: Copy the value of T_CLK_POST and T_CLK_PRE generated in the sheet to replace the value of mdss-dsi-t-clk-post and mdss-dsi-t-clk-pre in file trinket-sde-display.dtsi. The value in the sheet is in decimal format. Before you updating the two parameters, please make sure that these two values are in hexadecimal format. Here is an example:

qcom,mdss-dsi-t-clk-post = <0x0a>;
qcom,mdss-dsi-t-clk-pre = <0x1c>;

Figure 6: Update mdss-dsi-t-clk-post and mdss-dsi-t-clk-pre

3. Kernel and UEFI Configuration

This chapter takes LCD HX8394F as an example to introduce how to configure Kernel and UEFI to add a new panel.

NOTE: LCD parameters should be configured in both UEFI and Kernel.

  • After the module is booted, LCD will be driven using configuration parameters in UEFI before the module enters sleep mode for the first time.
  • After the module sleeps and then wakes up, LCD will be driven using configuration parameters in Kernel.

3.1. Configure Kernel

3.1.1. Configure Device Tree File

Step 1: Modify the configuration file of the used panel. For example, the default panel configuration file of the module is dsi-panel-hx8394f-720p-video.dtsi. You can rename dsi-panel-xxx-xxx-video.dtsi according to the actually used LCD, such as dsi-panel-hx8394f-720p-video.dtsi. Then copy the file to the directory kernel\msm-4.14\arch\arm64\boot\dts\qcom\.

Step 2: Modify dsi_hx8394f_720p_video in dsi-panel-xxx-xxx-video.dtsi into the name of the panel actually used. Other parameters can be modified referring to Chapter 2.1 to 2.6 as required.

/*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
&mdss_mdp {
 dsi_hx8394f_720p_video: qcom,mdss_dsi_hx8394f_720p_video {
 qcom,mdss-dsi-panel-name = "hx8394f video mode dsi panel without DSC";
 qcom,mdss-dsi-panel-type = "dsi_video_mode";
 qcom,mdss-dsi-virtual-channel-id = <0>;
 qcom,mdss-dsi-stream = <0>;
 qcom,mdss-dsi-h-left-border = <0>;
 qcom,mdss-dsi-h-right-border = <0>;
 qcom,mdss-dsi-v-top-border = <0>;
 qcom,mdss-dsi-v-bottom-border = <0>;
 qcom,mdss-dsi-bpp = <24>;

NOTE: You should configure dsi_xxx_xxx_video: qcom,mdss_dsi_xxx_xxx_video and make sure that dsi_xxx_xxx_video is consistent with the node name corresponding to trinket-sde-display.dtsi and trinket-idp.dtsi.

Step 3: Add panel configuration file actually used dsi-panel-xxx-xxx-video.dtsi to trinket-sde-display.dtsi in the kernel\msm-4.14\arch\arm64\boot\dts\qcom\ directory. The format is #include "dsi-panel-xxx-xxx-video.dtsi". Take the default panel configuration file dsi-panel-hx8394f-720p-video.dtsi as an example, as shown in the figure below:

#include "dsi-panel-nt36672-truly-fhd-video.dtsi"
#include "dsi-panel-hx8394f-720p-video.dtsi"
#include "dsi-panel-ili9881c-720p-video.dtsi"
#include "dsi-panel-ili9881d-720p-video.dtsi"

Step 4: Add qcom,dsi-display related configurations of the current panel in trinket-sde-display.dtsi. You can copy and modify the default panel configuration dsi_hx8394f_720p_video, as shown in the figure below:

dsi_hx8394f_720p_video display: qcom,dsi-display@5 {
 label = "dsi_hx8394f_720p_video_display";
 qcom,display-type = "primary";
 qcom,dsi-ctrl-num = <0>;
 qcom,dsi-phy-num = <0>;
 qcom,dsi-select-clocks = "mux_byte_clk0", "mux_pixel_clk0";
 qcom,dsi-panel = <&dsi_hx8394f_720p_video>;
};

In the figure:

  • dsi_hx8394f_720p_video_display: Panel name. You can modify it as required. Usually, you can refer to the panel node name in the panel configuration file dsi-panel-xxx-xxx-video.dtsi, and add_display after dsi_xxx_xxx_video to name it. For example, the default panel configuration file of the module is dsi-panel-hx8394f-720p-video.dtsi, and the node name of the panel is dsi_hx8394f_720p_video. Then the panel name can be configured as dsi_hx8394f_720p_video_display.
  • label: Generally, it should be consistent with the panel name.
  • qcom,dsi-display@5: The number followed by @ is the serial number of the panel. The module is configured with multiple panels by default, which are numbered in sequence, and the number cannot be repeated.
  • qcom,display-type = "primary": primary indicates main panel.
  • qcom,dsi-panel: The name of panel node in dsi-panel-xxx-xxx-video.dtsi. The format is qcom,dsi-panel = <&dsi_xxx_xxx_video>;. For example, qcom,dsi-panel = <&dsi_hx8394f_720p_video>;.

NOTE: If you modify the configuration of label, please inform Quectel, and Quectel will configure the name in UEFI to keep it consistent with the configuration of label.

Step 5: Add the configured dsi_xxx_xxx_video_display to dsi-display-list. For example, add dsi_hx8394f_720p_video_display to dsi-display-list, as shown in the figure below:

sde_dsi: qcom,dsi-display {
 compatible = "qcom,dsi-display";
 qcom,dsi-ctrl = <&mdss_dsi0>;
 qcom,dsi-phy = <&mdss_dsi_phy0>;

 clocks
 = <&mdss_dsi0_pll_BYTE0_MUX_CLK>,
 <&mdss_dsi0_pll_PIXO_MUX_CLK>,
 <&mdss_dsi0_pll_BYTE0_SRC_CLK>,
 <&mdss_dsi0_pll_PIXO_SRC_CLK>,
 <&mdss_dsi0_pll_SHADOW_BYTE0_SRC_CLK>,
 <&mdss_dsi0_pll_SHADOW_PIXO_SRC_CLK>;
 clock-names = "mux_byte_clk0", "mux_pixel_clk0",
 "src_byte_clk0", "src_pixel_clk0",
 "shadow_byte_clk0", "shadow_pixel_clk0";
 pinctrl-names = "panel_active", "panel_suspend";
 pinctrl-0 = <&sde_dsi_active &sde_te_active>;
 pinctrl-1 = <&sde_dsi_suspend &sde_te_suspend>;
 qcom,platform-te-gpio = <&tlmm 89 0>;
 vddio-supply = <&L12A>;
 // vdd-supply = <&L5P>;
 lab-supply = <&lcdb_ldo_vreg>;
 ibb-supply = <&lcdb_ncp_vreg>;

 qcom,dsi-display-list = 
 <dsi_td4330_truly_vid_display>
 <dsi_td4330_truly_cmd_display>
 <dsi_sim_vid_display>
 <dsi_hx83112a_truly_vid_display>
 <dci_nt36672_truly_vid_display>
 <dsi_hx8394f_720p_video_display>
 <dsi_ili9881c_720p_video_display>
 <dsi_ili9881d_720p_video_display>;
};

3.1.2. Update Kernel

Execute the following commands in sequence to compile and generate images.

source build/envsetup.sh
lunch trinket-userdebug
make bootimage
make dtboimage

Execute the following commands in sequence to burn the generated images to update the kernel.

adb reboot bootloader
fastboot flash boot boot.img
fastboot flash dtbo dtbo.img
fastboot reboot

3.2. Configure UEFI

The bootloader of SC668S series module is replaced by UEFI, and thus there is no need to debug LCD. You can send the configuration parameters debugged in Kernel to Quectel. Then Quectel will bring up the LCD in UEFI and send the updated image xbl.elf to you.

4. Appendix References

Table 9: Terms and Abbreviations
Abbreviation Description
BPP Bits Per Pixel
DSI Display Serial Interface
EVB Evaluation Board
LCD Liquid Crystal Display
MDP Mobile Display Processor
MIPI Mobile Industry Processor Interface
PHY Physical
PWM Pulse Width Modulation
UEFI Unified Extensible Firmware Interface

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