Hi,
I find in L4T 32.5.1 BSP source has a LT6911UXC driver
(Linux_for_Tegra/source/public/kernel/nvidia/drivers/media/i2c/lt6911uxc.c)
and I have to use the LT6911 chip in L4T 32.4.4.1 on NX.
Should I do any modification to this driver?
I find there is an I2C subnode in dtsi to describe LT6911
(Linux_for_Tegra/source/public/hardware/nvidia/platform/t19x/common/kernel-dts/t19x-common-modules/tegra194-camera-e2832.dtsi)
I also find the AGX’s dts has included this dtsi
another question is should I modify the subnode in dtsi file or just include this file to NX’s dts file?
i2c@3180000 {
e2832@2b {
compatible = "nvidia,lt6911uxc";
/* I2C device address */
reg = <0x2b>;
/* V4L2 device node location */
devnode = "video0";
/* Physical dimensions of sensor */
physical_w = "3.674";
physical_h = "2.738";
sensor_model = "e2832";
/* Define any required hw resources needed by driver */
/* ie. clocks, io pins, power sources */
avdd-reg = "vana";
iovdd-reg = "vif";
dvdd-reg = "vdig";
/* Defines number of frames to be dropped by driver internally after applying */
/* sensor crop settings. Some sensors send corrupt frames after applying */
/* crop co-ordinates */
/*post_crop_frame_drop = "0";*/
/**
* ==== Modes ====
* A modeX node is required to support v4l2 driver
* implementation with NVIDIA camera software stack
*
* == Signal properties ==
*
* phy_mode = "";
* PHY mode used by the MIPI lanes for this device
*
* tegra_sinterface = "";
* CSI Serial interface connected to tegra
* Incase of virtual HW devices, use virtual
* For SW emulated devices, use host
*
* pix_clk_hz = "";
* Sensor pixel clock used for calculations like exposure and framerate
*
* readout_orientation = "0";
* Based on camera module orientation.
* Only change readout_orientation if you specifically
* Program a different readout order for this mode
*
* == Image format Properties ==
*
* active_w = "";
* Pixel active region width
*
* active_h = "";
* Pixel active region height
*
* pixel_t = "";
* The sensor readout pixel pattern
*
* line_length = "";
* Pixel line length (width) for sensor mode.
*
* == Source Control Settings ==
*
* Gain factor used to convert fixed point integer to float
* Gain range [min_gain/gain_factor, max_gain/gain_factor]
* Gain step [step_gain/gain_factor is the smallest step that can be configured]
* Default gain [Default gain to be initialized for the control.
* use min_gain_val as default for optimal results]
* Framerate factor used to convert fixed point integer to float
* Framerate range [min_framerate/framerate_factor, max_framerate/framerate_factor]
* Framerate step [step_framerate/framerate_factor is the smallest step that can be configured]
* Default Framerate [Default framerate to be initialized for the control.
* use max_framerate to get required performance]
* Exposure factor used to convert fixed point integer to float
* For convenience use 1 sec = 1000000us as conversion factor
* Exposure range [min_exp_time/exposure_factor, max_exp_time/exposure_factor]
* Exposure step [step_exp_time/exposure_factor is the smallest step that can be configured]
* Default Exposure Time [Default exposure to be initialized for the control.
* Set default exposure based on the default_framerate for optimal exposure settings]
* For convenience use 1 sec = 1000000us as conversion factor
*
* gain_factor = ""; (integer factor used for floating to fixed point conversion)
* min_gain_val = ""; (ceil to integer)
* max_gain_val = ""; (ceil to integer)
* step_gain_val = ""; (ceil to integer)
* default_gain = ""; (ceil to integer)
* Gain limits for mode
*
* exposure_factor = ""; (integer factor used for floating to fixed point conversion)
* min_exp_time = ""; (ceil to integer)
* max_exp_time = ""; (ceil to integer)
* step_exp_time = ""; (ceil to integer)
* default_exp_time = ""; (ceil to integer)
* Exposure Time limits for mode (sec)
*
* framerate_factor = ""; (integer factor used for floating to fixed point conversion)
* min_framerate = ""; (ceil to integer)
* max_framerate = ""; (ceil to integer)
* step_framerate = ""; (ceil to integer)
* default_framerate = ""; (ceil to integer)
* Framerate limits for mode (fps)
*
* embedded_metadata_height = "";
* Sensor embedded metadata height in units of rows.
* If sensor does not support embedded metadata value should be 0.
* num_of_exposure = "";
* Digital overlap(Dol) frames
*
* num_of_ignored_lines = "";
* Used for cropping, eg. OB lines + Ignored area of effective pixel lines
*
* num_of_lines_offset_0 = "";
* Used for cropping, vertical blanking in front of short exposure data
* If more Dol frames are used, it can be extended, eg. num_of_lines_offset_1
*
* num_of_ignored_pixels = "";
* Used for cropping, The length of line info(pixels)
*
* num_of_left_margin_pixels = "";
* Used for cropping, the size of the left edge margin before
* the active pixel area (after ignored pixels)
*
* num_of_right_margin_pixels = "";
* Used for cropping, the size of the right edge margin after
* the active pixel area
*
*/
mode0 { // E2832_1920x1080_60Fps
mclk_khz = "24000";
num_lanes = "4";
tegra_sinterface = "serial_a";
phy_mode = "DPHY";
discontinuous_clk = "yes";
dpcm_enable = "false";
cil_settletime = "0";
active_w = "1920";
active_h = "1080";
mode_type = "rgb";
pixel_phase = "rgb888";
csi_pixel_bit_depth = "24";
readout_orientation = "0";
line_length = "1920";
inherent_gain = "1";
mclk_multiplier = "24";
pix_clk_hz = "576000000";
gain_factor = "16";
framerate_factor = "1000000";
exposure_factor = "1000000";
min_gain_val = "16"; /* 1.00x */
max_gain_val = "170"; /* 10.66x */
step_gain_val = "1";
default_gain = "16"; /* 1.00x */
min_hdr_ratio = "1";
max_hdr_ratio = "1";
min_framerate = "2000000"; /* 2.0 fps */
max_framerate = "60000000"; /* 60.0 fps */
step_framerate = "1";
default_framerate = "60000000"; /* 60.0 fps */
min_exp_time = "13"; /* us */
max_exp_time = "683709"; /* us */
step_exp_time = "1";
default_exp_time = "16667"; /* us */
};
mode1 { // E2832_1280x720_60Fps
mclk_khz = "24000";
num_lanes = "4";
tegra_sinterface = "serial_a";
phy_mode = "DPHY";
discontinuous_clk = "yes";
dpcm_enable = "false";
cil_settletime = "0";
active_w = "1280";
active_h = "720";
mode_type = "rgb";
pixel_phase = "rgb888";
csi_pixel_bit_depth = "24";
readout_orientation = "0";
line_length = "1280";
inherent_gain = "1";
mclk_multiplier = "24";
pix_clk_hz = "576000000";
gain_factor = "16";
framerate_factor = "1000000";
exposure_factor = "1000000";
min_gain_val = "16"; /* 1.00x */
max_gain_val = "170"; /* 10.66x */
step_gain_val = "1";
default_gain = "16"; /* 1.00x */
min_hdr_ratio = "1";
max_hdr_ratio = "1";
min_framerate = "2000000"; /* 2.0 fps */
max_framerate = "60000000"; /* 60.0 fps */
step_framerate = "1";
default_framerate = "60000000"; /* 60.0 fps */
min_exp_time = "13"; /* us */
max_exp_time = "683709"; /* us */
step_exp_time = "1";
default_exp_time = "16667"; /* us */
};
ports {
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
e2832_out0: endpoint {
port-index = <0>;
bus-width = <4>;
remote-endpoint = <&e2832_csi_in0>;
};
};
};
};
};
Thanks