diff options
| author | Huayang Duan <huayang.duan@mediatek.com> | 2019-08-19 16:40:01 +0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2019-09-24 10:28:01 +0000 |
| commit | 9400f84d3111ee888ac1a2b2e1fc942873e0d67a (patch) | |
| tree | 580b0d1df454cd2adec1ce80f0d80f6f9a6d00c6 /src/soc/mediatek/mt8183/emi.c | |
| parent | 1011ed76a629691491c3f18916277ae941a2c761 (diff) | |
mediatek/mt8183: Use different DRAM frequencies for eMCP DDR
Devices using eMCP may run at a high DRAM frequency (e.g., 3600Mbps)
while those with discrete DRAM can only run at 3200Mbps. This patch
enables 3600Mbps for eMCP DDR for better system performance.
BUG=b:80501386
BRANCH=none
TEST=Boots correctly and stress test passes on Kukui
Change-Id: Iab6a9c2c390feeb9497b051a255b29566909e656
Signed-off-by: Huayang Duan <huayang.duan@mediatek.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34990
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Diffstat (limited to 'src/soc/mediatek/mt8183/emi.c')
| -rw-r--r-- | src/soc/mediatek/mt8183/emi.c | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/src/soc/mediatek/mt8183/emi.c b/src/soc/mediatek/mt8183/emi.c index a582fe0828..8bd8a39a35 100644 --- a/src/soc/mediatek/mt8183/emi.c +++ b/src/soc/mediatek/mt8183/emi.c @@ -19,9 +19,17 @@ #include <soc/dramc_pi_api.h> #include <soc/dramc_register.h> -#define LP4X_HIGH_FREQ LP4X_DDR3200 -#define LP4X_MIDDLE_FREQ LP4X_DDR2400 -#define LP4X_LOW_FREQ LP4X_DDR1600 +static const u8 freq_shuffle[DRAM_DFS_SHUFFLE_MAX] = { + [DRAM_DFS_SHUFFLE_1] = LP4X_DDR3200, + [DRAM_DFS_SHUFFLE_2] = LP4X_DDR2400, + [DRAM_DFS_SHUFFLE_3] = LP4X_DDR1600, +}; + +static const u8 freq_shuffle_emcp[DRAM_DFS_SHUFFLE_MAX] = { + [DRAM_DFS_SHUFFLE_1] = LP4X_DDR3600, + [DRAM_DFS_SHUFFLE_2] = LP4X_DDR3200, + [DRAM_DFS_SHUFFLE_3] = LP4X_DDR1600, +}; u32 frequency_table[LP4X_DDRFREQ_MAX] = { [LP4X_DDR1600] = 1600, @@ -349,9 +357,16 @@ static void after_calib(void) void mt_set_emi(const struct sdram_params *params) { - u32 current_freq = LP4X_HIGH_FREQ; + const u8 *freq_tbl; + u8 current_freqsel; + + if (CONFIG(MT8183_DRAM_EMCP)) + freq_tbl = freq_shuffle_emcp; + else + freq_tbl = freq_shuffle; + current_freqsel = freq_tbl[DRAM_DFS_SHUFFLE_1]; - init_dram(params, current_freq); - do_calib(params, current_freq); + init_dram(params, current_freqsel); + do_calib(params, current_freqsel); after_calib(); } |