diff options
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/gpu/nvgpu/gp10b/platform_gp10b_tegra.c | 47 |
1 files changed, 34 insertions, 13 deletions
diff --git a/drivers/gpu/nvgpu/gp10b/platform_gp10b_tegra.c b/drivers/gpu/nvgpu/gp10b/platform_gp10b_tegra.c index 8cf6d5e8..5e5c7703 100644 --- a/drivers/gpu/nvgpu/gp10b/platform_gp10b_tegra.c +++ b/drivers/gpu/nvgpu/gp10b/platform_gp10b_tegra.c | |||
@@ -1,7 +1,7 @@ | |||
1 | /* | 1 | /* |
2 | * GP10B Tegra Platform Interface | 2 | * GP10B Tegra Platform Interface |
3 | * | 3 | * |
4 | * Copyright (c) 2014-2016, NVIDIA CORPORATION. All rights reserved. | 4 | * Copyright (c) 2014-2017, NVIDIA CORPORATION. All rights reserved. |
5 | * | 5 | * |
6 | * This program is free software; you can redistribute it and/or modify it | 6 | * This program is free software; you can redistribute it and/or modify it |
7 | * under the terms and conditions of the GNU General Public License, | 7 | * under the terms and conditions of the GNU General Public License, |
@@ -35,8 +35,12 @@ | |||
35 | #include "gp10b_sysfs.h" | 35 | #include "gp10b_sysfs.h" |
36 | #include <linux/platform/tegra/emc_bwmgr.h> | 36 | #include <linux/platform/tegra/emc_bwmgr.h> |
37 | 37 | ||
38 | #define GP10B_MAX_SUPPORTED_FREQS 11 | 38 | /* Select every GP10B_FREQ_SELECT_STEP'th frequency from h/w table */ |
39 | static unsigned long gp10b_freq_table[GP10B_MAX_SUPPORTED_FREQS]; | 39 | #define GP10B_FREQ_SELECT_STEP 8 |
40 | /* Max number of freq supported in h/w */ | ||
41 | #define GP10B_MAX_SUPPORTED_FREQS 120 | ||
42 | static unsigned long | ||
43 | gp10b_freq_table[GP10B_MAX_SUPPORTED_FREQS / GP10B_FREQ_SELECT_STEP]; | ||
40 | 44 | ||
41 | #define TEGRA_GP10B_BW_PER_FREQ 64 | 45 | #define TEGRA_GP10B_BW_PER_FREQ 64 |
42 | #define TEGRA_DDR4_BW_PER_FREQ 16 | 46 | #define TEGRA_DDR4_BW_PER_FREQ 16 |
@@ -340,22 +344,39 @@ static int gp10b_clk_get_freqs(struct device *dev, | |||
340 | unsigned long **freqs, int *num_freqs) | 344 | unsigned long **freqs, int *num_freqs) |
341 | { | 345 | { |
342 | struct gk20a_platform *platform = gk20a_get_platform(dev); | 346 | struct gk20a_platform *platform = gk20a_get_platform(dev); |
343 | unsigned long min_rate, max_rate, freq_step, rate; | 347 | unsigned long max_rate; |
344 | int i; | 348 | unsigned long new_rate = 0, prev_rate = 0; |
349 | int i = 0, freq_counter = 0; | ||
345 | 350 | ||
346 | min_rate = clk_round_rate(platform->clk[0], 0); | ||
347 | max_rate = clk_round_rate(platform->clk[0], (UINT_MAX - 1)); | 351 | max_rate = clk_round_rate(platform->clk[0], (UINT_MAX - 1)); |
348 | freq_step = (max_rate - min_rate)/(GP10B_MAX_SUPPORTED_FREQS - 1); | ||
349 | gk20a_dbg_info("min rate: %ld max rate: %ld freq step %ld\n", | ||
350 | min_rate, max_rate, freq_step); | ||
351 | 352 | ||
352 | for (i = 0; i < GP10B_MAX_SUPPORTED_FREQS; i++) { | 353 | /* |
353 | rate = min_rate + i * freq_step; | 354 | * Walk the h/w frequency table and only select |
354 | gp10b_freq_table[i] = clk_round_rate(platform->clk[0], rate); | 355 | * GP10B_FREQ_SELECT_STEP'th frequencies and |
356 | * add MAX freq to last | ||
357 | */ | ||
358 | for (; i < GP10B_MAX_SUPPORTED_FREQS; ++i) { | ||
359 | prev_rate = new_rate; | ||
360 | new_rate = clk_round_rate(platform->clk[0], prev_rate + 1); | ||
361 | |||
362 | if (i % GP10B_FREQ_SELECT_STEP == 0 || | ||
363 | new_rate == max_rate) { | ||
364 | gp10b_freq_table[freq_counter++] = new_rate; | ||
365 | |||
366 | if (new_rate == max_rate) | ||
367 | break; | ||
368 | } | ||
355 | } | 369 | } |
370 | |||
371 | WARN_ON(i == GP10B_MAX_SUPPORTED_FREQS); | ||
372 | |||
356 | /* Fill freq table */ | 373 | /* Fill freq table */ |
357 | *freqs = gp10b_freq_table; | 374 | *freqs = gp10b_freq_table; |
358 | *num_freqs = GP10B_MAX_SUPPORTED_FREQS; | 375 | *num_freqs = freq_counter; |
376 | |||
377 | gk20a_dbg_info("min rate: %ld max rate: %ld num_of_freq %d\n", | ||
378 | gp10b_freq_table[0], max_rate, *num_freqs); | ||
379 | |||
359 | return 0; | 380 | return 0; |
360 | } | 381 | } |
361 | 382 | ||