1 /* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.
2  *
3  * This program is free software; you can redistribute it and/or modify
4  * it under the terms of the GNU General Public License version 2 and
5  * only version 2 as published by the Free Software Foundation.
6  *
7  * This program is distributed in the hope that it will be useful,
8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
10  * GNU General Public License for more details.
11  */
12 
13 #define pr_fmt(fmt)	"[drm:%s:%d] " fmt, __func__, __LINE__
14 #include <linux/slab.h>
15 #include <linux/of_address.h>
16 #include <linux/platform_device.h>
17 #include "dpu_hw_mdss.h"
18 #include "dpu_hw_catalog.h"
19 #include "dpu_hw_catalog_format.h"
20 #include "dpu_kms.h"
21 
22 #define VIG_SDM845_MASK \
23 	(BIT(DPU_SSPP_SRC) | BIT(DPU_SSPP_SCALER_QSEED3) | BIT(DPU_SSPP_QOS) |\
24 	BIT(DPU_SSPP_CSC_10BIT) | BIT(DPU_SSPP_CDP) | BIT(DPU_SSPP_QOS_8LVL) |\
25 	BIT(DPU_SSPP_TS_PREFILL) | BIT(DPU_SSPP_EXCL_RECT))
26 
27 #define DMA_SDM845_MASK \
28 	(BIT(DPU_SSPP_SRC) | BIT(DPU_SSPP_QOS) | BIT(DPU_SSPP_QOS_8LVL) |\
29 	BIT(DPU_SSPP_TS_PREFILL) | BIT(DPU_SSPP_TS_PREFILL_REC1) |\
30 	BIT(DPU_SSPP_CDP) | BIT(DPU_SSPP_EXCL_RECT))
31 
32 #define MIXER_SDM845_MASK \
33 	(BIT(DPU_MIXER_SOURCESPLIT) | BIT(DPU_DIM_LAYER))
34 
35 #define PINGPONG_SDM845_MASK BIT(DPU_PINGPONG_DITHER)
36 
37 #define PINGPONG_SDM845_SPLIT_MASK \
38 	(PINGPONG_SDM845_MASK | BIT(DPU_PINGPONG_TE2))
39 
40 #define DEFAULT_PIXEL_RAM_SIZE		(50 * 1024)
41 #define DEFAULT_DPU_LINE_WIDTH		2048
42 #define DEFAULT_DPU_OUTPUT_LINE_WIDTH	2560
43 
44 #define MAX_HORZ_DECIMATION	4
45 #define MAX_VERT_DECIMATION	4
46 
47 #define MAX_UPSCALE_RATIO	20
48 #define MAX_DOWNSCALE_RATIO	4
49 #define SSPP_UNITY_SCALE	1
50 
51 #define STRCAT(X, Y) (X Y)
52 
53 /*************************************************************
54  * DPU sub blocks config
55  *************************************************************/
56 /* DPU top level caps */
57 static const struct dpu_caps sdm845_dpu_caps = {
58 	.max_mixer_width = DEFAULT_DPU_OUTPUT_LINE_WIDTH,
59 	.max_mixer_blendstages = 0xb,
60 	.qseed_type = DPU_SSPP_SCALER_QSEED3,
61 	.smart_dma_rev = DPU_SSPP_SMART_DMA_V2,
62 	.ubwc_version = DPU_HW_UBWC_VER_20,
63 	.has_src_split = true,
64 	.has_dim_layer = true,
65 	.has_idle_pc = true,
66 };
67 
68 static struct dpu_mdp_cfg sdm845_mdp[] = {
69 	{
70 	.name = "top_0", .id = MDP_TOP,
71 	.base = 0x0, .len = 0x45C,
72 	.features = 0,
73 	.highest_bank_bit = 0x2,
74 	.has_dest_scaler = true,
75 	.clk_ctrls[DPU_CLK_CTRL_VIG0] = {
76 			.reg_off = 0x2AC, .bit_off = 0},
77 	.clk_ctrls[DPU_CLK_CTRL_VIG1] = {
78 			.reg_off = 0x2B4, .bit_off = 0},
79 	.clk_ctrls[DPU_CLK_CTRL_VIG2] = {
80 			.reg_off = 0x2BC, .bit_off = 0},
81 	.clk_ctrls[DPU_CLK_CTRL_VIG3] = {
82 			.reg_off = 0x2C4, .bit_off = 0},
83 	.clk_ctrls[DPU_CLK_CTRL_DMA0] = {
84 			.reg_off = 0x2AC, .bit_off = 8},
85 	.clk_ctrls[DPU_CLK_CTRL_DMA1] = {
86 			.reg_off = 0x2B4, .bit_off = 8},
87 	.clk_ctrls[DPU_CLK_CTRL_CURSOR0] = {
88 			.reg_off = 0x2BC, .bit_off = 8},
89 	.clk_ctrls[DPU_CLK_CTRL_CURSOR1] = {
90 			.reg_off = 0x2C4, .bit_off = 8},
91 	},
92 };
93 
94 /*************************************************************
95  * CTL sub blocks config
96  *************************************************************/
97 static struct dpu_ctl_cfg sdm845_ctl[] = {
98 	{
99 	.name = "ctl_0", .id = CTL_0,
100 	.base = 0x1000, .len = 0xE4,
101 	.features = BIT(DPU_CTL_SPLIT_DISPLAY)
102 	},
103 	{
104 	.name = "ctl_1", .id = CTL_1,
105 	.base = 0x1200, .len = 0xE4,
106 	.features = BIT(DPU_CTL_SPLIT_DISPLAY)
107 	},
108 	{
109 	.name = "ctl_2", .id = CTL_2,
110 	.base = 0x1400, .len = 0xE4,
111 	.features = 0
112 	},
113 	{
114 	.name = "ctl_3", .id = CTL_3,
115 	.base = 0x1600, .len = 0xE4,
116 	.features = 0
117 	},
118 	{
119 	.name = "ctl_4", .id = CTL_4,
120 	.base = 0x1800, .len = 0xE4,
121 	.features = 0
122 	},
123 };
124 
125 /*************************************************************
126  * SSPP sub blocks config
127  *************************************************************/
128 
129 /* SSPP common configuration */
130 static const struct dpu_sspp_blks_common sdm845_sspp_common = {
131 	.maxlinewidth = DEFAULT_DPU_OUTPUT_LINE_WIDTH,
132 	.pixel_ram_size = DEFAULT_PIXEL_RAM_SIZE,
133 	.maxhdeciexp = MAX_HORZ_DECIMATION,
134 	.maxvdeciexp = MAX_VERT_DECIMATION,
135 };
136 
137 #define _VIG_SBLK(num, sdma_pri) \
138 	{ \
139 	.common = &sdm845_sspp_common, \
140 	.maxdwnscale = MAX_DOWNSCALE_RATIO, \
141 	.maxupscale = MAX_UPSCALE_RATIO, \
142 	.smart_dma_priority = sdma_pri, \
143 	.src_blk = {.name = STRCAT("sspp_src_", num), \
144 		.id = DPU_SSPP_SRC, .base = 0x00, .len = 0x150,}, \
145 	.scaler_blk = {.name = STRCAT("sspp_scaler", num), \
146 		.id = DPU_SSPP_SCALER_QSEED3, \
147 		.base = 0xa00, .len = 0xa0,}, \
148 	.csc_blk = {.name = STRCAT("sspp_csc", num), \
149 		.id = DPU_SSPP_CSC_10BIT, \
150 		.base = 0x1a00, .len = 0x100,}, \
151 	.format_list = plane_formats_yuv, \
152 	.virt_format_list = plane_formats, \
153 	}
154 
155 #define _DMA_SBLK(num, sdma_pri) \
156 	{ \
157 	.common = &sdm845_sspp_common, \
158 	.maxdwnscale = SSPP_UNITY_SCALE, \
159 	.maxupscale = SSPP_UNITY_SCALE, \
160 	.smart_dma_priority = sdma_pri, \
161 	.src_blk = {.name = STRCAT("sspp_src_", num), \
162 		.id = DPU_SSPP_SRC, .base = 0x00, .len = 0x150,}, \
163 	.format_list = plane_formats, \
164 	.virt_format_list = plane_formats, \
165 	}
166 
167 static const struct dpu_sspp_sub_blks sdm845_vig_sblk_0 = _VIG_SBLK("0", 5);
168 static const struct dpu_sspp_sub_blks sdm845_vig_sblk_1 = _VIG_SBLK("1", 6);
169 static const struct dpu_sspp_sub_blks sdm845_vig_sblk_2 = _VIG_SBLK("2", 7);
170 static const struct dpu_sspp_sub_blks sdm845_vig_sblk_3 = _VIG_SBLK("3", 8);
171 
172 static const struct dpu_sspp_sub_blks sdm845_dma_sblk_0 = _DMA_SBLK("8", 1);
173 static const struct dpu_sspp_sub_blks sdm845_dma_sblk_1 = _DMA_SBLK("9", 2);
174 static const struct dpu_sspp_sub_blks sdm845_dma_sblk_2 = _DMA_SBLK("10", 3);
175 static const struct dpu_sspp_sub_blks sdm845_dma_sblk_3 = _DMA_SBLK("11", 4);
176 
177 #define SSPP_VIG_BLK(_name, _id, _base, _sblk, _xinid, _clkctrl) \
178 	{ \
179 	.name = _name, .id = _id, \
180 	.base = _base, .len = 0x1c8, \
181 	.features = VIG_SDM845_MASK, \
182 	.sblk = &_sblk, \
183 	.xin_id = _xinid, \
184 	.type = SSPP_TYPE_VIG, \
185 	.clk_ctrl = _clkctrl \
186 	}
187 
188 #define SSPP_DMA_BLK(_name, _id, _base, _sblk, _xinid, _clkctrl) \
189 	{ \
190 	.name = _name, .id = _id, \
191 	.base = _base, .len = 0x1c8, \
192 	.features = DMA_SDM845_MASK, \
193 	.sblk = &_sblk, \
194 	.xin_id = _xinid, \
195 	.type = SSPP_TYPE_DMA, \
196 	.clk_ctrl = _clkctrl \
197 	}
198 
199 static struct dpu_sspp_cfg sdm845_sspp[] = {
200 	SSPP_VIG_BLK("sspp_0", SSPP_VIG0, 0x4000,
201 		sdm845_vig_sblk_0, 0, DPU_CLK_CTRL_VIG0),
202 	SSPP_VIG_BLK("sspp_1", SSPP_VIG1, 0x6000,
203 		sdm845_vig_sblk_1, 4, DPU_CLK_CTRL_VIG1),
204 	SSPP_VIG_BLK("sspp_2", SSPP_VIG2, 0x8000,
205 		sdm845_vig_sblk_2, 8, DPU_CLK_CTRL_VIG2),
206 	SSPP_VIG_BLK("sspp_3", SSPP_VIG3, 0xa000,
207 		sdm845_vig_sblk_3, 12, DPU_CLK_CTRL_VIG3),
208 	SSPP_DMA_BLK("sspp_8", SSPP_DMA0, 0x24000,
209 		sdm845_dma_sblk_0, 1, DPU_CLK_CTRL_DMA0),
210 	SSPP_DMA_BLK("sspp_9", SSPP_DMA1, 0x26000,
211 		sdm845_dma_sblk_1, 5, DPU_CLK_CTRL_DMA1),
212 	SSPP_DMA_BLK("sspp_10", SSPP_DMA2, 0x28000,
213 		sdm845_dma_sblk_2, 9, DPU_CLK_CTRL_CURSOR0),
214 	SSPP_DMA_BLK("sspp_11", SSPP_DMA3, 0x2a000,
215 		sdm845_dma_sblk_3, 13, DPU_CLK_CTRL_CURSOR1),
216 };
217 
218 /*************************************************************
219  * MIXER sub blocks config
220  *************************************************************/
221 static const struct dpu_lm_sub_blks sdm845_lm_sblk = {
222 	.maxwidth = DEFAULT_DPU_OUTPUT_LINE_WIDTH,
223 	.maxblendstages = 11, /* excluding base layer */
224 	.blendstage_base = { /* offsets relative to mixer base */
225 		0x20, 0x38, 0x50, 0x68, 0x80, 0x98,
226 		0xb0, 0xc8, 0xe0, 0xf8, 0x110
227 	},
228 };
229 
230 #define LM_BLK(_name, _id, _base, _ds, _pp, _lmpair) \
231 	{ \
232 	.name = _name, .id = _id, \
233 	.base = _base, .len = 0x320, \
234 	.features = MIXER_SDM845_MASK, \
235 	.sblk = &sdm845_lm_sblk, \
236 	.ds = _ds, \
237 	.pingpong = _pp, \
238 	.lm_pair_mask = (1 << _lmpair) \
239 	}
240 
241 static struct dpu_lm_cfg sdm845_lm[] = {
242 	LM_BLK("lm_0", LM_0, 0x44000, DS_0, PINGPONG_0, LM_1),
243 	LM_BLK("lm_1", LM_1, 0x45000, DS_1, PINGPONG_1, LM_0),
244 	LM_BLK("lm_2", LM_2, 0x46000, DS_MAX, PINGPONG_2, LM_5),
245 	LM_BLK("lm_3", LM_3, 0x0, DS_MAX, PINGPONG_MAX, 0),
246 	LM_BLK("lm_4", LM_4, 0x0, DS_MAX, PINGPONG_MAX, 0),
247 	LM_BLK("lm_5", LM_5, 0x49000, DS_MAX, PINGPONG_3, LM_2),
248 };
249 
250 /*************************************************************
251  * DS sub blocks config
252  *************************************************************/
253 static const struct dpu_ds_top_cfg sdm845_ds_top = {
254 	.name = "ds_top_0", .id = DS_TOP,
255 	.base = 0x60000, .len = 0xc,
256 	.maxinputwidth = DEFAULT_DPU_LINE_WIDTH,
257 	.maxoutputwidth = DEFAULT_DPU_OUTPUT_LINE_WIDTH,
258 	.maxupscale = MAX_UPSCALE_RATIO,
259 };
260 
261 #define DS_BLK(_name, _id, _base) \
262 	{\
263 	.name = _name, .id = _id, \
264 	.base = _base, .len = 0x800, \
265 	.features = DPU_SSPP_SCALER_QSEED3, \
266 	.top = &sdm845_ds_top \
267 	}
268 
269 static struct dpu_ds_cfg sdm845_ds[] = {
270 	DS_BLK("ds_0", DS_0, 0x800),
271 	DS_BLK("ds_1", DS_1, 0x1000),
272 };
273 
274 /*************************************************************
275  * PINGPONG sub blocks config
276  *************************************************************/
277 static const struct dpu_pingpong_sub_blks sdm845_pp_sblk_te = {
278 	.te2 = {.id = DPU_PINGPONG_TE2, .base = 0x2000, .len = 0x0,
279 		.version = 0x1},
280 	.dither = {.id = DPU_PINGPONG_DITHER, .base = 0x30e0,
281 		.len = 0x20, .version = 0x10000},
282 };
283 
284 static const struct dpu_pingpong_sub_blks sdm845_pp_sblk = {
285 	.dither = {.id = DPU_PINGPONG_DITHER, .base = 0x30e0,
286 		.len = 0x20, .version = 0x10000},
287 };
288 
289 #define PP_BLK_TE(_name, _id, _base) \
290 	{\
291 	.name = _name, .id = _id, \
292 	.base = _base, .len = 0xd4, \
293 	.features = PINGPONG_SDM845_SPLIT_MASK, \
294 	.sblk = &sdm845_pp_sblk_te \
295 	}
296 #define PP_BLK(_name, _id, _base) \
297 	{\
298 	.name = _name, .id = _id, \
299 	.base = _base, .len = 0xd4, \
300 	.features = PINGPONG_SDM845_MASK, \
301 	.sblk = &sdm845_pp_sblk \
302 	}
303 
304 static struct dpu_pingpong_cfg sdm845_pp[] = {
305 	PP_BLK_TE("pingpong_0", PINGPONG_0, 0x70000),
306 	PP_BLK_TE("pingpong_1", PINGPONG_1, 0x70800),
307 	PP_BLK("pingpong_2", PINGPONG_2, 0x71000),
308 	PP_BLK("pingpong_3", PINGPONG_3, 0x71800),
309 };
310 
311 /*************************************************************
312  * INTF sub blocks config
313  *************************************************************/
314 #define INTF_BLK(_name, _id, _base, _type, _ctrl_id) \
315 	{\
316 	.name = _name, .id = _id, \
317 	.base = _base, .len = 0x280, \
318 	.type = _type, \
319 	.controller_id = _ctrl_id, \
320 	.prog_fetch_lines_worst_case = 24 \
321 	}
322 
323 static struct dpu_intf_cfg sdm845_intf[] = {
324 	INTF_BLK("intf_0", INTF_0, 0x6A000, INTF_DP, 0),
325 	INTF_BLK("intf_1", INTF_1, 0x6A800, INTF_DSI, 0),
326 	INTF_BLK("intf_2", INTF_2, 0x6B000, INTF_DSI, 1),
327 	INTF_BLK("intf_3", INTF_3, 0x6B800, INTF_DP, 1),
328 };
329 
330 /*************************************************************
331  * CDM sub blocks config
332  *************************************************************/
333 static struct dpu_cdm_cfg sdm845_cdm[] = {
334 	{
335 	.name = "cdm_0", .id = CDM_0,
336 	.base = 0x79200, .len = 0x224,
337 	.features = 0,
338 	.intf_connect = BIT(INTF_3),
339 	},
340 };
341 
342 /*************************************************************
343  * VBIF sub blocks config
344  *************************************************************/
345 /* VBIF QOS remap */
346 static u32 sdm845_rt_pri_lvl[] = {3, 3, 4, 4, 5, 5, 6, 6};
347 static u32 sdm845_nrt_pri_lvl[] = {3, 3, 3, 3, 3, 3, 3, 3};
348 
349 static struct dpu_vbif_cfg sdm845_vbif[] = {
350 	{
351 	.name = "vbif_0", .id = VBIF_0,
352 	.base = 0, .len = 0x1040,
353 	.features = BIT(DPU_VBIF_QOS_REMAP),
354 	.xin_halt_timeout = 0x4000,
355 	.qos_rt_tbl = {
356 		.npriority_lvl = ARRAY_SIZE(sdm845_rt_pri_lvl),
357 		.priority_lvl = sdm845_rt_pri_lvl,
358 		},
359 	.qos_nrt_tbl = {
360 		.npriority_lvl = ARRAY_SIZE(sdm845_nrt_pri_lvl),
361 		.priority_lvl = sdm845_nrt_pri_lvl,
362 		},
363 	.memtype_count = 14,
364 	.memtype = {3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3},
365 	},
366 };
367 
368 static struct dpu_reg_dma_cfg sdm845_regdma = {
369 	.base = 0x0, .version = 0x1, .trigger_sel_off = 0x119c
370 };
371 
372 /*************************************************************
373  * PERF data config
374  *************************************************************/
375 
376 /* SSPP QOS LUTs */
377 static struct dpu_qos_lut_entry sdm845_qos_linear[] = {
378 	{.fl = 4, .lut = 0x357},
379 	{.fl = 5, .lut = 0x3357},
380 	{.fl = 6, .lut = 0x23357},
381 	{.fl = 7, .lut = 0x223357},
382 	{.fl = 8, .lut = 0x2223357},
383 	{.fl = 9, .lut = 0x22223357},
384 	{.fl = 10, .lut = 0x222223357},
385 	{.fl = 11, .lut = 0x2222223357},
386 	{.fl = 12, .lut = 0x22222223357},
387 	{.fl = 13, .lut = 0x222222223357},
388 	{.fl = 14, .lut = 0x1222222223357},
389 	{.fl = 0, .lut = 0x11222222223357}
390 };
391 
392 static struct dpu_qos_lut_entry sdm845_qos_macrotile[] = {
393 	{.fl = 10, .lut = 0x344556677},
394 	{.fl = 11, .lut = 0x3344556677},
395 	{.fl = 12, .lut = 0x23344556677},
396 	{.fl = 13, .lut = 0x223344556677},
397 	{.fl = 14, .lut = 0x1223344556677},
398 	{.fl = 0, .lut = 0x112233344556677},
399 };
400 
401 static struct dpu_qos_lut_entry sdm845_qos_nrt[] = {
402 	{.fl = 0, .lut = 0x0},
403 };
404 
405 static struct dpu_perf_cfg sdm845_perf_data = {
406 	.max_bw_low = 6800000,
407 	.max_bw_high = 6800000,
408 	.min_core_ib = 2400000,
409 	.min_llcc_ib = 800000,
410 	.min_dram_ib = 800000,
411 	.core_ib_ff = "6.0",
412 	.core_clk_ff = "1.0",
413 	.comp_ratio_rt =
414 	"NV12/5/1/1.23 AB24/5/1/1.23 XB24/5/1/1.23",
415 	.comp_ratio_nrt =
416 	"NV12/5/1/1.25 AB24/5/1/1.25 XB24/5/1/1.25",
417 	.undersized_prefill_lines = 2,
418 	.xtra_prefill_lines = 2,
419 	.dest_scale_prefill_lines = 3,
420 	.macrotile_prefill_lines = 4,
421 	.yuv_nv12_prefill_lines = 8,
422 	.linear_prefill_lines = 1,
423 	.downscaling_prefill_lines = 1,
424 	.amortizable_threshold = 25,
425 	.min_prefill_lines = 24,
426 	.danger_lut_tbl = {0xf, 0xffff, 0x0},
427 	.qos_lut_tbl = {
428 		{.nentry = ARRAY_SIZE(sdm845_qos_linear),
429 		.entries = sdm845_qos_linear
430 		},
431 		{.nentry = ARRAY_SIZE(sdm845_qos_macrotile),
432 		.entries = sdm845_qos_macrotile
433 		},
434 		{.nentry = ARRAY_SIZE(sdm845_qos_nrt),
435 		.entries = sdm845_qos_nrt
436 		},
437 	},
438 	.cdp_cfg = {
439 		{.rd_enable = 1, .wr_enable = 1},
440 		{.rd_enable = 1, .wr_enable = 0}
441 	},
442 };
443 
444 /*************************************************************
445  * Hardware catalog init
446  *************************************************************/
447 
448 /*
449  * sdm845_cfg_init(): populate sdm845 dpu sub-blocks reg offsets
450  * and instance counts.
451  */
sdm845_cfg_init(struct dpu_mdss_cfg * dpu_cfg)452 static void sdm845_cfg_init(struct dpu_mdss_cfg *dpu_cfg)
453 {
454 	*dpu_cfg = (struct dpu_mdss_cfg){
455 		.caps = &sdm845_dpu_caps,
456 		.mdp_count = ARRAY_SIZE(sdm845_mdp),
457 		.mdp = sdm845_mdp,
458 		.ctl_count = ARRAY_SIZE(sdm845_ctl),
459 		.ctl = sdm845_ctl,
460 		.sspp_count = ARRAY_SIZE(sdm845_sspp),
461 		.sspp = sdm845_sspp,
462 		.mixer_count = ARRAY_SIZE(sdm845_lm),
463 		.mixer = sdm845_lm,
464 		.ds_count = ARRAY_SIZE(sdm845_ds),
465 		.ds = sdm845_ds,
466 		.pingpong_count = ARRAY_SIZE(sdm845_pp),
467 		.pingpong = sdm845_pp,
468 		.cdm_count = ARRAY_SIZE(sdm845_cdm),
469 		.cdm = sdm845_cdm,
470 		.intf_count = ARRAY_SIZE(sdm845_intf),
471 		.intf = sdm845_intf,
472 		.vbif_count = ARRAY_SIZE(sdm845_vbif),
473 		.vbif = sdm845_vbif,
474 		.reg_dma_count = 1,
475 		.dma_cfg = sdm845_regdma,
476 		.perf = sdm845_perf_data,
477 	};
478 }
479 
480 static struct dpu_mdss_hw_cfg_handler cfg_handler[] = {
481 	{ .hw_rev = DPU_HW_VER_400, .cfg_init = sdm845_cfg_init},
482 	{ .hw_rev = DPU_HW_VER_401, .cfg_init = sdm845_cfg_init},
483 };
484 
dpu_hw_catalog_deinit(struct dpu_mdss_cfg * dpu_cfg)485 void dpu_hw_catalog_deinit(struct dpu_mdss_cfg *dpu_cfg)
486 {
487 	kfree(dpu_cfg);
488 }
489 
dpu_hw_catalog_init(u32 hw_rev)490 struct dpu_mdss_cfg *dpu_hw_catalog_init(u32 hw_rev)
491 {
492 	int i;
493 	struct dpu_mdss_cfg *dpu_cfg;
494 
495 	dpu_cfg = kzalloc(sizeof(*dpu_cfg), GFP_KERNEL);
496 	if (!dpu_cfg)
497 		return ERR_PTR(-ENOMEM);
498 
499 	for (i = 0; i < ARRAY_SIZE(cfg_handler); i++) {
500 		if (cfg_handler[i].hw_rev == hw_rev) {
501 			cfg_handler[i].cfg_init(dpu_cfg);
502 			dpu_cfg->hwversion = hw_rev;
503 			return dpu_cfg;
504 		}
505 	}
506 
507 	DPU_ERROR("unsupported chipset id:%X\n", hw_rev);
508 	dpu_hw_catalog_deinit(dpu_cfg);
509 	return ERR_PTR(-ENODEV);
510 }
511 
512