| /Linux-v6.1/Documentation/admin-guide/pm/ |
| D | cpufreq.rst | 7 CPU Performance Scaling
15 The Concept of CPU Performance Scaling
44 to as CPU performance scaling or CPU frequency scaling (because it involves
48 CPU Performance Scaling in Linux
51 The Linux kernel supports CPU performance scaling by means of the ``CPUFreq``
52 (CPU Frequency scaling) subsystem that consists of three layers of code: the
53 core, scaling governors and scaling drivers.
56 interfaces for all platforms that support CPU performance scaling. It defines
59 Scaling governors implement algorithms to estimate the required CPU capacity.
60 As a rule, each governor implements one, possibly parametrized, scaling
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| D | intel_pstate.rst | 5 ``intel_pstate`` CPU Performance Scaling Driver
17 :doc:`CPU performance scaling subsystem <cpufreq>` in the Linux kernel
18 (``CPUFreq``). It is a scaling driver for the Sandy Bridge and later
50 ``sysfs`` which allows another ``CPUFreq`` scaling driver to be loaded and
58 active mode, it uses its own internal performance scaling governor algorithm or
59 allows the hardware to do performance scaling by itself, while in the passive
61 a certain performance scaling algorithm. Which of them will be in effect
73 In this mode the driver bypasses the scaling governors layer of ``CPUFreq`` and
74 provides its own scaling algorithms for P-state selection. Those algorithms
75 can be applied to ``CPUFreq`` policies in the same way as generic scaling
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| D | intel_uncore_frequency_scaling.rst | 5 Intel Uncore Frequency Scaling
17 performance, SoCs have internal algorithms for scaling uncore frequency. These
22 the scaling min/max frequencies via cpufreq sysfs to improve CPU performance.
26 use both cpufreq and the uncore scaling interface to distribute power and
36 uncore scaling control is per die in multiple die/package SoCs or per
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| /Linux-v6.1/arch/arm64/boot/dts/qcom/ |
| D | pm7250b.dtsi | 66 qcom,pre-scaling = <1 1>;
72 qcom,pre-scaling = <1 1>;
78 qcom,pre-scaling = <1 1>;
84 qcom,pre-scaling = <1 1>;
90 qcom,pre-scaling = <1 16>;
96 qcom,pre-scaling = <1 1>;
103 qcom,pre-scaling = <1 1>;
109 qcom,pre-scaling = <1 6>;
115 qcom,pre-scaling = <1 3>;
121 qcom,pre-scaling = <1 3>;
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| D | pm660.dtsi | 97 qcom,pre-scaling = <1 1>;
103 qcom,pre-scaling = <1 1>;
109 qcom,pre-scaling = <1 1>;
114 qcom,pre-scaling = <1 1>;
122 qcom,pre-scaling = <1 1>;
130 qcom,pre-scaling = <1 1>;
138 qcom,pre-scaling = <1 1>;
146 qcom,pre-scaling = <1 1>;
154 qcom,pre-scaling = <1 1>;
163 qcom,pre-scaling = <1 3>;
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| D | pms405.dtsi | 84 qcom,pre-scaling = <1 1>;
89 qcom,pre-scaling = <1 1>;
94 qcom,pre-scaling = <1 3>;
99 qcom,pre-scaling = <1 1>;
106 qcom,pre-scaling = <1 1>;
113 qcom,pre-scaling = <1 1>;
120 qcom,pre-scaling = <1 1>;
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| D | pm6150l.dtsi | 25 qcom,pre-scaling = <1 1>;
31 qcom,pre-scaling = <1 1>;
37 qcom,pre-scaling = <1 1>;
43 qcom,pre-scaling = <1 3>;
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| D | pm8150b.dtsi | 81 qcom,pre-scaling = <1 1>;
87 qcom,pre-scaling = <1 1>;
93 qcom,pre-scaling = <1 1>;
99 qcom,pre-scaling = <1 1>;
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| /Linux-v6.1/Documentation/userspace-api/media/v4l/ |
| D | crop.rst | 6 Image Cropping, Insertion and Scaling -- the CROP API
20 abilities cropping and scaling. Some video output devices can scale an
33 Scaling requires a source and a target. On a video capture or overlay
48 support scaling or the :ref:`VIDIOC_G_CROP <VIDIOC_G_CROP>` and
68 Image Cropping, Insertion and Scaling
70 The cropping, insertion and scaling process
108 Scaling Adjustments
111 Video hardware can have various cropping, insertion and scaling
112 limitations. It may only scale up or down, support only discrete scaling
113 factors, or have different scaling abilities in horizontal and vertical
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| D | dev-subdev.rst | 101 :ref:`pipeline-scaling`, where image scaling can be performed on both
105 .. _pipeline-scaling:
118 scaling on the sensor is required to achieve higher frame rates.
193 - Sub-devices that scale frames using variable scaling factors should
195 modified. If the 1:1 scaling ratio is supported, this means that
206 for the pipeline described in :ref:`pipeline-scaling` (table columns
337 Selections: cropping, scaling and composition
360 The scaling operation changes the size of the image by scaling it to new
361 dimensions. The scaling ratio isn't specified explicitly, but is implied
365 Scaling support is optional. When supported by a subdev, the crop
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| D | selection-api-configuration.rst | 11 Video hardware can have various cropping, composing and scaling
12 limitations. It may only scale up or down, support only discrete scaling
13 factors, or have different scaling abilities in the horizontal and
14 vertical directions. Also it may not support scaling at all. At the same
130 Scaling control
133 An application can detect if scaling is performed by comparing the width
136 scaling is applied. The application can compute the scaling ratios using
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| /Linux-v6.1/drivers/cpufreq/ |
| D | Kconfig.arm | 3 # ARM CPU Frequency scaling drivers
58 Armada8K device has the AP806 which supports scaling
88 ("AVS") to handle voltage and frequency scaling. This driver provides
130 tristate "CPU Frequency scaling support for MediaTek SoCs"
222 CPU Frequency scaling support for S3C2410
230 CPU Frequency scaling support for S3C2412 and S3C2413 SoC CPUs.
233 bool "S3C2416 CPU Frequency scaling support"
239 voltage scaling mode in which it is possible to reduce the
245 bool "Allow voltage scaling for S3C2416 arm core"
248 Enable CPU voltage scaling when entering the dvs mode.
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| D | Kconfig.powerpc | 3 tristate "CBE frequency scaling"
12 bool "CBE frequency scaling using PMI interface"
51 tristate "CPU frequency scaling for IBM POWERNV platform"
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| D | Kconfig | 2 menu "CPU Frequency scaling"
5 bool "CPU Frequency scaling"
8 CPU Frequency scaling allows you to change the clock speed of
134 tristate "'userspace' governor for userspace frequency scaling"
207 comment "CPU frequency scaling drivers"
316 tristate "CPU frequency scaling driver for Freescale QorIQ SoCs"
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| /Linux-v6.1/drivers/staging/media/sunxi/cedrus/ |
| D | cedrus_h265.c | 248 const struct v4l2_ctrl_hevc_scaling_matrix *scaling; in cedrus_h265_write_scaling_list() local
252 scaling = run->h265.scaling_matrix; in cedrus_h265_write_scaling_list()
255 (scaling->scaling_list_dc_coef_32x32[1] << 24) | in cedrus_h265_write_scaling_list()
256 (scaling->scaling_list_dc_coef_32x32[0] << 16) | in cedrus_h265_write_scaling_list()
257 (scaling->scaling_list_dc_coef_16x16[1] << 8) | in cedrus_h265_write_scaling_list()
258 (scaling->scaling_list_dc_coef_16x16[0] << 0)); in cedrus_h265_write_scaling_list()
261 (scaling->scaling_list_dc_coef_16x16[5] << 24) | in cedrus_h265_write_scaling_list()
262 (scaling->scaling_list_dc_coef_16x16[4] << 16) | in cedrus_h265_write_scaling_list()
263 (scaling->scaling_list_dc_coef_16x16[3] << 8) | in cedrus_h265_write_scaling_list()
264 (scaling->scaling_list_dc_coef_16x16[2] << 0)); in cedrus_h265_write_scaling_list()
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| /Linux-v6.1/drivers/media/i2c/ |
| D | saa711x_regs.h | 112 /* Horizontal phase scaling */
120 /* Vertical scaling */
159 /* Horizontal phase scaling */
166 /* Vertical scaling */
422 /* Task A: Horizontal phase scaling */
424 "Task A: Horizontal luminance scaling increment"},
429 "Task A: Horizontal chrominance scaling increment"},
434 /* Task A: Vertical scaling */
436 "Task A: Vertical luminance scaling increment"},
438 "Task A: Vertical chrominance scaling increment"},
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| /Linux-v6.1/Documentation/devicetree/bindings/iio/dac/ |
| D | adi,ad3552r.yaml | 95 adi,gain-scaling-p-inv-log2:
96 description: GainP = 1 / ( 2 ^ adi,gain-scaling-p-inv-log2)
100 adi,gain-scaling-n-inv-log2:
101 description: GainN = 1 / ( 2 ^ adi,gain-scaling-n-inv-log2)
110 - adi,gain-scaling-p-inv-log2
111 - adi,gain-scaling-n-inv-log2
211 adi,gain-scaling-p-inv-log2 = <1>;
212 adi,gain-scaling-n-inv-log2 = <2>;
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| /Linux-v6.1/drivers/media/platform/renesas/vsp1/ |
| D | vsp1_uds.c | 37 * Scaling Computation
50 * uds_output_size - Return the output size for an input size and scaling ratio
52 * @ratio: scaling ratio in U4.12 fixed-point format
57 /* Down-scaling */ in uds_output_size()
65 /* Up-scaling */ in uds_output_size()
84 * uds_passband_width - Return the passband filter width for a scaling ratio
85 * @ratio: scaling ratio in U4.12 fixed-point format
90 /* Down-scaling */ in uds_passband_width()
98 /* Up-scaling */ in uds_passband_width()
283 * Multi-tap scaling can't be enabled along with alpha scaling when in uds_configure_stream()
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| /Linux-v6.1/drivers/staging/media/atomisp/pci/ |
| D | ia_css_types.h | 152 * Before the shading correction is applied, NxN-filter and/or scaling
158 * - Down-scaling/Up-scaling factor
180 * In some isp binaries, the bayer scaling is applied before the shading correction is applied.
181 * Then, this scaling factor should be considered in generating the shading table.
182 * The scaling factor is expressed by these parameters.
189 * This is the size BEFORE the bayer scaling is applied.
194 * The size of this area assumes the size AFTER the bayer scaling is applied
276 …* 2. process: Driver applies the sensor cropping/binning/scaling to physical sensor si…
279 …* 4. process: ISP applies the bayer scaling by the factor of shading_info.bayer_scale_…
280 * 5. sensor data size: Scaling factor * ISP input size (== shading_info.sensor_data_res_bqs)
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| /Linux-v6.1/Documentation/devicetree/bindings/input/ |
| D | microchip,qt1050.txt | 41 - microchip,average-scaling:
42 The scaling factor which is used to scale the average-samples.
61 microchip,average-scaling = <16>;
69 microchip,average-scaling = <8>;
76 microchip,average-scaling = <16>;
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| /Linux-v6.1/drivers/gpu/drm/ |
| D | drm_rect.c | 84 * the corresponding amounts, retaining the vertical and horizontal scaling
153 * drm_rect_calc_hscale - calculate the horizontal scaling factor
156 * @min_hscale: minimum allowed horizontal scaling factor
157 * @max_hscale: maximum allowed horizontal scaling factor
159 * Calculate the horizontal scaling factor as
167 * The horizontal scaling factor, or errno of out of limits.
188 * drm_rect_calc_vscale - calculate the vertical scaling factor
191 * @min_vscale: minimum allowed vertical scaling factor
192 * @max_vscale: maximum allowed vertical scaling factor
194 * Calculate the vertical scaling factor as
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| /Linux-v6.1/Documentation/cpu-freq/ |
| D | index.rst | 4 Linux CPUFreq - CPU frequency and voltage scaling code in the Linux(TM) kernel
9 Clock scaling allows you to change the clock speed of the CPUs on the
38 Clock and voltage scaling for the SA-1100:
39 * http://www.lartmaker.nl/projects/scaling
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| /Linux-v6.1/drivers/gpu/drm/tests/ |
| D | drm_rect_test.c | 43 /* 1:1 scaling */ in drm_test_rect_clip_scaled_not_clipped()
57 /* 2:1 scaling */ in drm_test_rect_clip_scaled_not_clipped()
71 /* 1:2 scaling */ in drm_test_rect_clip_scaled_not_clipped()
91 /* 1:1 scaling top/left clip */ in drm_test_rect_clip_scaled_clipped()
105 /* 1:1 scaling bottom/right clip */ in drm_test_rect_clip_scaled_clipped()
119 /* 2:1 scaling top/left clip */ in drm_test_rect_clip_scaled_clipped()
133 /* 2:1 scaling bottom/right clip */ in drm_test_rect_clip_scaled_clipped()
147 /* 1:2 scaling top/left clip */ in drm_test_rect_clip_scaled_clipped()
161 /* 1:2 scaling bottom/right clip */ in drm_test_rect_clip_scaled_clipped()
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| /Linux-v6.1/arch/arm/boot/dts/ |
| D | qcom-pmx55.dtsi | 45 qcom,pre-scaling = <1 1>;
51 qcom,pre-scaling = <1 1>;
57 qcom,pre-scaling = <1 1>;
63 qcom,pre-scaling = <1 1>;
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| /Linux-v6.1/drivers/gpu/drm/amd/display/dc/dcn20/ |
| D | dcn20_dwb.c | 103 /* Only chroma scaling (sub-sampling) is supported in DCN2 */ in dwb2_enable()
107 DC_LOG_DWB("%s inst = %d, FAILED!LUMA SCALING NOT SUPPORTED", __func__, dwbc20->base.inst); in dwb2_enable()
123 /* Set scaling parameters */ in dwb2_enable()
163 /* Only chroma scaling (sub-sampling) is supported in DCN2 */ in dwb2_update()
166 DC_LOG_DWB("%s inst = %d, FAILED!LUMA SCALING NOT SUPPORTED", __func__, dwbc20->base.inst); in dwb2_update()
169 DC_LOG_DWB("%s inst = %d, scaling", __func__, dwbc20->base.inst); in dwb2_update()
187 /* Set scaling parameters */ in dwb2_update()
255 /* Program scaling mode */ in dwb2_set_scaler()
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