From: Sven Eckelmann seckelmann@datto.com
stable inclusion from stable-5.10.80 commit e1ee11473a88d65d3abc26df976312d199139dd2 bugzilla: 185821 https://gitee.com/openeuler/kernel/issues/I4L7CG
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 0a491167fe0cf9f26062462de2a8688b96125d48 ]
Most of the txpower for the ath10k firmware is stored as twicepower (0.5 dB steps). This isn't the case for max_antenna_gain - which is still expected by the firmware as dB.
The firmware is converting it from dB to the internal (twicepower) representation when it calculates the limits of a channel. This can be seen in tpc_stats when configuring "12" as max_antenna_gain. Instead of the expected 12 (6 dB), the tpc_stats shows 24 (12 dB).
Tested on QCA9888 and IPQ4019 with firmware 10.4-3.5.3-00057.
Fixes: 02256930d9b8 ("ath10k: use proper tx power unit") Signed-off-by: Sven Eckelmann seckelmann@datto.com Signed-off-by: Kalle Valo kvalo@codeaurora.org Link: https://lore.kernel.org/r/20190611172131.6064-1-sven@narfation.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Chen Jun chenjun102@huawei.com Reviewed-by: Weilong Chen chenweilong@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com
Signed-off-by: Chen Jun chenjun102@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/net/wireless/ath/ath10k/mac.c | 6 +++--- drivers/net/wireless/ath/ath10k/wmi.h | 3 +++ 2 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index 90dc48f66fbf..c42977918e04 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -1041,7 +1041,7 @@ static int ath10k_monitor_vdev_start(struct ath10k *ar, int vdev_id) arg.channel.min_power = 0; arg.channel.max_power = channel->max_power * 2; arg.channel.max_reg_power = channel->max_reg_power * 2; - arg.channel.max_antenna_gain = channel->max_antenna_gain * 2; + arg.channel.max_antenna_gain = channel->max_antenna_gain;
reinit_completion(&ar->vdev_setup_done); reinit_completion(&ar->vdev_delete_done); @@ -1487,7 +1487,7 @@ static int ath10k_vdev_start_restart(struct ath10k_vif *arvif, arg.channel.min_power = 0; arg.channel.max_power = chandef->chan->max_power * 2; arg.channel.max_reg_power = chandef->chan->max_reg_power * 2; - arg.channel.max_antenna_gain = chandef->chan->max_antenna_gain * 2; + arg.channel.max_antenna_gain = chandef->chan->max_antenna_gain;
if (arvif->vdev_type == WMI_VDEV_TYPE_AP) { arg.ssid = arvif->u.ap.ssid; @@ -3258,7 +3258,7 @@ static int ath10k_update_channel_list(struct ath10k *ar) ch->min_power = 0; ch->max_power = channel->max_power * 2; ch->max_reg_power = channel->max_reg_power * 2; - ch->max_antenna_gain = channel->max_antenna_gain * 2; + ch->max_antenna_gain = channel->max_antenna_gain; ch->reg_class_id = 0; /* FIXME */
/* FIXME: why use only legacy modes, why not any diff --git a/drivers/net/wireless/ath/ath10k/wmi.h b/drivers/net/wireless/ath/ath10k/wmi.h index 66ecf09068c1..e244b7038e60 100644 --- a/drivers/net/wireless/ath/ath10k/wmi.h +++ b/drivers/net/wireless/ath/ath10k/wmi.h @@ -2066,7 +2066,9 @@ struct wmi_channel { union { __le32 reginfo1; struct { + /* note: power unit is 1 dBm */ u8 antenna_max; + /* note: power unit is 0.5 dBm */ u8 max_tx_power; } __packed; } __packed; @@ -2086,6 +2088,7 @@ struct wmi_channel_arg { u32 min_power; u32 max_power; u32 max_reg_power; + /* note: power unit is 1 dBm */ u32 max_antenna_gain; u32 reg_class_id; enum wmi_phy_mode mode;