Re: [PATCH 16/20] phy: qcom-qmp-pcie: drop start-ctrl abstraction
From: Dmitry Baryshkov
Date: Wed Oct 12 2022 - 17:20:23 EST
On 12/10/2022 11:49, Johan Hovold wrote:
All PCIe PHYs need to start and stop the SerDes and PCS so drop the
start-ctrl abstraction which is no longer needed since the QMP driver
split.
Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
---
drivers/phy/qualcomm/phy-qcom-qmp-pcie.c | 18 +++---------------
1 file changed, 3 insertions(+), 15 deletions(-)
I think it should be possible to also drop the pwrdn_ctrl by replacing
it with something like no_refclk_drv_dsbl. However I'd like to
understand why this is not required for SDX55. Is this the peculiarity
of that platform? Or is it a specifics of the EP mode?
Many, Vinod, do you know the answer by chance?
Nevertheless, for this patch:
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
index d3e7e673114f..5534a4ad0243 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
@@ -1355,7 +1355,6 @@ struct qmp_phy_cfg {
/* array of registers with different offsets */
const unsigned int *regs;
- unsigned int start_ctrl;
unsigned int pwrdn_ctrl;
/* bit offset of PHYSTATUS in QPHY_PCS_STATUS register */
unsigned int phy_status;
@@ -1491,7 +1490,6 @@ static const struct qmp_phy_cfg ipq8074_pciephy_cfg = {
.num_vregs = 0,
.regs = pciephy_regs_layout,
- .start_ctrl = SERDES_START | PCS_START,
.pwrdn_ctrl = SW_PWRDN | REFCLK_DRV_DSBL,
.phy_status = PHYSTATUS,
};
@@ -1517,7 +1515,6 @@ static const struct qmp_phy_cfg ipq8074_pciephy_gen3_cfg = {
.num_vregs = 0,
.regs = ipq_pciephy_gen3_regs_layout,
- .start_ctrl = SERDES_START | PCS_START,
.pwrdn_ctrl = SW_PWRDN | REFCLK_DRV_DSBL,
.phy_status = PHYSTATUS,
@@ -1547,7 +1544,6 @@ static const struct qmp_phy_cfg ipq6018_pciephy_cfg = {
.num_vregs = 0,
.regs = ipq_pciephy_gen3_regs_layout,
- .start_ctrl = SERDES_START | PCS_START,
.pwrdn_ctrl = SW_PWRDN | REFCLK_DRV_DSBL,
.phy_status = PHYSTATUS,
};
@@ -1575,7 +1571,6 @@ static const struct qmp_phy_cfg sdm845_qmp_pciephy_cfg = {
.num_vregs = ARRAY_SIZE(qmp_phy_vreg_l),
.regs = sdm845_qmp_pciephy_regs_layout,
- .start_ctrl = PCS_START | SERDES_START,
.pwrdn_ctrl = SW_PWRDN | REFCLK_DRV_DSBL,
.phy_status = PHYSTATUS,
};
@@ -1601,7 +1596,6 @@ static const struct qmp_phy_cfg sdm845_qhp_pciephy_cfg = {
.num_vregs = ARRAY_SIZE(qmp_phy_vreg_l),
.regs = sdm845_qhp_pciephy_regs_layout,
- .start_ctrl = PCS_START | SERDES_START,
.pwrdn_ctrl = SW_PWRDN | REFCLK_DRV_DSBL,
.phy_status = PHYSTATUS,
};
@@ -1639,7 +1633,6 @@ static const struct qmp_phy_cfg sm8250_qmp_gen3x1_pciephy_cfg = {
.num_vregs = ARRAY_SIZE(qmp_phy_vreg_l),
.regs = sm8250_pcie_regs_layout,
- .start_ctrl = PCS_START | SERDES_START,
.pwrdn_ctrl = SW_PWRDN | REFCLK_DRV_DSBL,
.phy_status = PHYSTATUS,
};
@@ -1677,7 +1670,6 @@ static const struct qmp_phy_cfg sm8250_qmp_gen3x2_pciephy_cfg = {
.num_vregs = ARRAY_SIZE(qmp_phy_vreg_l),
.regs = sm8250_pcie_regs_layout,
- .start_ctrl = PCS_START | SERDES_START,
.pwrdn_ctrl = SW_PWRDN | REFCLK_DRV_DSBL,
.phy_status = PHYSTATUS,
};
@@ -1703,7 +1695,6 @@ static const struct qmp_phy_cfg msm8998_pciephy_cfg = {
.num_vregs = ARRAY_SIZE(qmp_phy_vreg_l),
.regs = pciephy_regs_layout,
- .start_ctrl = SERDES_START | PCS_START,
.pwrdn_ctrl = SW_PWRDN | REFCLK_DRV_DSBL,
.phy_status = PHYSTATUS,
@@ -1733,7 +1724,6 @@ static const struct qmp_phy_cfg sc8180x_pciephy_cfg = {
.num_vregs = ARRAY_SIZE(qmp_phy_vreg_l),
.regs = sm8250_pcie_regs_layout,
- .start_ctrl = PCS_START | SERDES_START,
.pwrdn_ctrl = SW_PWRDN | REFCLK_DRV_DSBL,
.phy_status = PHYSTATUS,
};
@@ -1761,7 +1751,6 @@ static const struct qmp_phy_cfg sdx55_qmp_pciephy_cfg = {
.num_vregs = ARRAY_SIZE(qmp_phy_vreg_l),
.regs = sm8250_pcie_regs_layout,
- .start_ctrl = PCS_START | SERDES_START,
.pwrdn_ctrl = SW_PWRDN,
.phy_status = PHYSTATUS_4_20,
};
@@ -1789,7 +1778,6 @@ static const struct qmp_phy_cfg sm8450_qmp_gen3x1_pciephy_cfg = {
.num_vregs = ARRAY_SIZE(qmp_phy_vreg_l),
.regs = sm8250_pcie_regs_layout,
- .start_ctrl = SERDES_START | PCS_START,
.pwrdn_ctrl = SW_PWRDN | REFCLK_DRV_DSBL,
.phy_status = PHYSTATUS,
};
@@ -1832,7 +1820,6 @@ static const struct qmp_phy_cfg sm8450_qmp_gen4x2_pciephy_cfg = {
.num_vregs = ARRAY_SIZE(qmp_phy_vreg_l),
.regs = sm8250_pcie_regs_layout,
- .start_ctrl = SERDES_START | PCS_START,
.pwrdn_ctrl = SW_PWRDN | REFCLK_DRV_DSBL,
.phy_status = PHYSTATUS_4_20,
};
@@ -1997,7 +1984,7 @@ static int qmp_pcie_power_on(struct phy *phy)
qphy_clrbits(pcs, cfg->regs[QPHY_SW_RESET], SW_RESET);
/* start SerDes and Phy-Coding-Sublayer */
- qphy_setbits(pcs, cfg->regs[QPHY_START_CTRL], cfg->start_ctrl);
+ qphy_setbits(pcs, cfg->regs[QPHY_START_CTRL], SERDES_START | PCS_START);
if (!cfg->skip_start_delay)
usleep_range(1000, 1200);
@@ -2030,7 +2017,8 @@ static int qmp_pcie_power_off(struct phy *phy)
qphy_setbits(qphy->pcs, cfg->regs[QPHY_SW_RESET], SW_RESET);
/* stop SerDes and Phy-Coding-Sublayer */
- qphy_clrbits(qphy->pcs, cfg->regs[QPHY_START_CTRL], cfg->start_ctrl);
+ qphy_clrbits(qphy->pcs, cfg->regs[QPHY_START_CTRL],
+ SERDES_START | PCS_START);
/* Put PHY into POWER DOWN state: active low */
qphy_clrbits(qphy->pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL],
--
With best wishes
Dmitry