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bh=6L+o2xBlnX13VJHQyX2QgkyA28VGIf6z49wDsY/otFc=; b=H0rgAmkIEd4gJ8YqWmT1Cq9CkmwJxZXXUa4fC48MImTP4uGi0KuCGWrYodjpy1ZuSe+c0K m858ZGoy0szr/G98Bju0iflCPdzKGm9UlYVe/NnXqHvRlp9ytDJcNgaLW5ZL3XUfG8FzUi MAucv5hLxEr+qmGHe3GR/EUtrEg7VQU= Received: from diogo-gram.home (unknown [IPv6:2a01:14:8070:dc60:4589:2164:1bc5:2670]) (Authenticated sender: ist187313) by mail1.tecnico.ulisboa.pt (Postfix) with ESMTPSA id 39FF636006F; Tue, 7 May 2024 10:31:59 +0100 (WEST) From: Diogo Ivo To: krzysztof.kozlowski@linaro.org, thierry.reding@gmail.com, jonathanh@nvidia.com, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Diogo Ivo Subject: [PATCH RESEND v3 7/7] memory: tegra: Rework update_clock_tree_delay() Date: Tue, 7 May 2024 10:30:50 +0100 Message-ID: <20240507093056.3921-8-diogo.ivo@tecnico.ulisboa.pt> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240507093056.3921-1-diogo.ivo@tecnico.ulisboa.pt> References: <20240507093056.3921-1-diogo.ivo@tecnico.ulisboa.pt> Precedence: bulk X-Mailing-List: linux-tegra@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Further streamline this function by moving the delay post-processing to the callers, leaving it only with the task of returning the measured delay values. Signed-off-by: Diogo Ivo --- drivers/memory/tegra/tegra210-emc-cc-r21021.c | 120 +++++++----------- 1 file changed, 46 insertions(+), 74 deletions(-) diff --git a/drivers/memory/tegra/tegra210-emc-cc-r21021.c b/drivers/memory/tegra/tegra210-emc-cc-r21021.c index a8a217502f0c..277fca62f57e 100644 --- a/drivers/memory/tegra/tegra210-emc-cc-r21021.c +++ b/drivers/memory/tegra/tegra210-emc-cc-r21021.c @@ -105,7 +105,7 @@ enum { next->ptfv_list[w])) / \ (next->ptfv_list[w] + 1); \ \ - emc_dbg(emc, EMA_UPDATES, "%s: (s=%lu) EMA: %u\n", \ + emc_dbg(emc, EMA_UPDATES, "%s: (s=%u) EMA: %u\n", \ __stringify(dev), nval, next->ptfv_list[dqs]); \ } while (0) @@ -130,93 +130,51 @@ static bool tegra210_emc_compare_update_delay(struct tegra210_emc_timing *timing return false; } -static bool update_clock_tree_delay(struct tegra210_emc *emc, int type) +static void tegra210_emc_get_clktree_delay(struct tegra210_emc *emc, + u32 delay[DRAM_CLKTREE_NUM]) { - bool periodic_training_update = type == PERIODIC_TRAINING_UPDATE; - struct tegra210_emc_timing *last = emc->last; - struct tegra210_emc_timing *next = emc->next; - u32 last_timing_rate_mhz = last->rate / 1000; - bool dvfs_update = type == DVFS_UPDATE; - bool dvfs_pt1 = type == DVFS_PT1; - u32 temp[2][2], value, delay_us; - unsigned long cval = 0; + struct tegra210_emc_timing *curr = emc->last; + u32 rate_mhz = curr->rate / 1000; + u32 msb, lsb, dqsosc, delay_us; unsigned int c, d, idx; - bool over = false; + unsigned long clocks; - if (dvfs_pt1 || periodic_training_update) { - delay_us = tegra210_emc_actual_osc_clocks(last->run_clocks); - delay_us *= 1000; - delay_us = 2 + (delay_us / last->rate); + clocks = tegra210_emc_actual_osc_clocks(curr->run_clocks); + delay_us = 2 + (clocks / rate_mhz); - tegra210_emc_start_periodic_compensation(emc); - udelay(delay_us); - } + tegra210_emc_start_periodic_compensation(emc); + udelay(delay_us); for (d = 0; d < emc->num_devices; d++) { - if (dvfs_pt1 || periodic_training_update) { - /* Dev[d] MSB */ - value = tegra210_emc_mrr_read(emc, 2 - d, 19); - - for (c = 0; c < emc->num_channels; c++) { - temp[c][0] = (value & 0x00ff) << 8; - temp[c][1] = (value & 0xff00) << 0; - value >>= 16; - } - - /* Dev[d] LSB */ - value = tegra210_emc_mrr_read(emc, 2 - d, 18); - - for (c = 0; c < emc->num_channels; c++) { - temp[c][0] |= (value & 0x00ff) >> 0; - temp[c][1] |= (value & 0xff00) >> 8; - value >>= 16; - } - } + /* Read DQSOSC from MRR18/19 */ + msb = tegra210_emc_mrr_read(emc, 2 - d, 19); + lsb = tegra210_emc_mrr_read(emc, 2 - d, 18); for (c = 0; c < emc->num_channels; c++) { /* C[c]D[d]U[0] */ idx = c * 4 + d * 2; - if (dvfs_pt1 || periodic_training_update) { - cval = tegra210_emc_actual_osc_clocks(last->run_clocks); - cval *= 1000000; - cval /= last_timing_rate_mhz * 2 * temp[c][0]; - } - - if (dvfs_pt1) - __INCREMENT_PTFV(idx, cval); - else if (dvfs_update) - __AVERAGE_PTFV(idx); - else if (periodic_training_update) - __WEIGHTED_UPDATE_PTFV(idx, cval); + dqsosc = (msb & 0x00ff) << 8; + dqsosc |= (lsb & 0x00ff) >> 0; - if (dvfs_update || periodic_training_update) - over |= tegra210_emc_compare_update_delay(next, - __MOVAVG_AC(next, idx), idx); + /* Check for unpopulated channels */ + if (dqsosc) + delay[idx] = clocks * 1000000 / rate_mhz * 2 * dqsosc; /* C[c]D[d]U[1] */ idx++; - if (dvfs_pt1 || periodic_training_update) { - cval = tegra210_emc_actual_osc_clocks(last->run_clocks); - cval *= 1000000; - cval /= last_timing_rate_mhz * 2 * temp[c][1]; - } + dqsosc = (msb & 0xff00) << 0; + dqsosc |= (lsb & 0xff00) >> 8; - if (dvfs_pt1) - __INCREMENT_PTFV(idx, cval); - else if (dvfs_update) - __AVERAGE_PTFV(idx); - else if (periodic_training_update) - __WEIGHTED_UPDATE_PTFV(idx, cval); + /* Check for unpopulated channels */ + if (dqsosc) + delay[idx] = clocks * 1000000 / rate_mhz * 2 * dqsosc; - if (dvfs_update || periodic_training_update) - over |= tegra210_emc_compare_update_delay(next, - __MOVAVG_AC(next, idx), idx); + msb >>= 16; + lsb >>= 16; } } - - return over; } static bool periodic_compensation_handler(struct tegra210_emc *emc, u32 type, @@ -228,8 +186,8 @@ static bool periodic_compensation_handler(struct tegra210_emc *emc, u32 type, (nt)->ptfv_list[PTFV_DVFS_SAMPLES_INDEX]; }) u32 i, samples = next->ptfv_list[PTFV_DVFS_SAMPLES_INDEX]; + u32 delay[DRAM_CLKTREE_NUM], idx; bool over = false; - u32 idx; if (!next->periodic_training) return 0; @@ -252,16 +210,30 @@ static bool periodic_compensation_handler(struct tegra210_emc *emc, u32 type, for (i = 0; i < samples; i++) { /* Generate next sample of data. */ - update_clock_tree_delay(emc, DVFS_PT1); + tegra210_emc_get_clktree_delay(emc, delay); + + for (idx = 0; idx < DRAM_CLKTREE_NUM; idx++) + __INCREMENT_PTFV(idx, delay[idx]); } } - /* Do the division part of the moving average */ - over = update_clock_tree_delay(emc, DVFS_UPDATE); + for (idx = 0; idx < DRAM_CLKTREE_NUM; idx++) { + /* Do the division part of the moving average */ + __AVERAGE_PTFV(idx); + over |= tegra210_emc_compare_update_delay(next, + __MOVAVG_AC(next, idx), idx); + } } - if (type == PERIODIC_TRAINING_SEQUENCE) - over = update_clock_tree_delay(emc, PERIODIC_TRAINING_UPDATE); + if (type == PERIODIC_TRAINING_SEQUENCE) { + tegra210_emc_get_clktree_delay(emc, delay); + + for (idx = 0; idx < DRAM_CLKTREE_NUM; idx++) { + __WEIGHTED_UPDATE_PTFV(idx, delay[idx]); + over |= tegra210_emc_compare_update_delay(next, + __MOVAVG_AC(next, idx), idx); + } + } return over; }