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memory: tegra: Remove periodic compensation duplicate calls

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Prior to calling periodic_compensation_handler() the code is doing one
extra DRAM delay reading which is unnecessary as this is already done
in periodic_compensation_handler(), so remove these extra calls.

Signed-off-by: Diogo Ivo <diogo.ivo@tecnico.ulisboa.pt>
Link: https://lore.kernel.org/r/20240704-tegra210_emcfreq-v4-1-3e450503c555@tecnico.ulisboa.pt
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
This commit is contained in:
Diogo Ivo 2024-07-04 12:31:20 +01:00 • committed by Krzysztof Kozlowski
parent 8400291e28
commit 649f4783dc
1 changed files with 2 additions and 17 deletions
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19
drivers/memory/tegra/tegra210-emc-cc-r21021.c
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@ -492,7 +492,6 @@ static u32 tegra210_emc_r21021_periodic_compensation(struct tegra210_emc *emc)
};
struct tegra210_emc_timing *last = emc->last;
unsigned int items = ARRAY_SIZE(list), i;
unsigned long delay;
if (last->periodic_training) {
emc_dbg(emc, PER_TRAIN, "Periodic training starting\n");
@ -530,18 +529,9 @@ static u32 tegra210_emc_r21021_periodic_compensation(struct tegra210_emc *emc)
/*
* 2. osc kick off - this assumes training and dvfs have set
* correct MR23.
*/
tegra210_emc_start_periodic_compensation(emc);
/*
*
* 3. Let dram capture its clock tree delays.
*/
delay = tegra210_emc_actual_osc_clocks(last->run_clocks);
delay *= 1000;
delay /= last->rate + 1;
udelay(delay);
/*
*
* 4. Check delta wrt previous values (save value if margin
* exceeds what is set in table).
*/
@ -734,11 +724,6 @@ static void tegra210_emc_r21021_set_clock(struct tegra210_emc *emc, u32 clksrc)
EMC_EMC_STATUS_DRAM_IN_SELF_REFRESH_MASK,
0);
tegra210_emc_start_periodic_compensation(emc);
delay = 1000 * tegra210_emc_actual_osc_clocks(last->run_clocks);
udelay((delay / last->rate) + 2);
value = periodic_compensation_handler(emc, DVFS_SEQUENCE, fake,
next);
value = (value * 128 * next->rate / 1000) / 1000000;