Hi Mika,
> -----Original Message-----
> From: Kahola, Mika <mika.kah...@intel.com>
> Sent: Friday, February 24, 2023 2:14 AM
> To: intel-gfx@lists.freedesktop.org
> Cc: Sripada, Radhakrishna <radhakrishna.srip...@intel.com>; Deak, Imre
> <imre.d...@intel.com>; Shankar, Uma <uma.shan...@intel.com>; Kahola,
> Mika <mika.kah...@intel.com>
> Subject: [PATCH v4 04/22] drm/i915/mtl: Add Support for C10 PHY message bus
> and pll programming
>
> From: Radhakrishna Sripada <radhakrishna.srip...@intel.com>
>
> XELPDP has C10 and C20 phys from Synopsys to drive displays. Each phy
> has a dedicated PIPE 5.2 Message bus for configuration. This message
> bus is used to configure the phy internal registers.
>
> XELPDP has C10 phys to drive output to the EDP and the native output
> from the display engine. Add structures, programming hardware state
> readout logic. Port clock calculations are similar to DG2. Use the DG2
> formulae to calculate the port clock but use the relevant pll signals.
> Note: PHY lane 0 is always used for PLL programming.
>
> Add sequences for C10 phy enable/disable phy lane reset,
> powerdown change sequence and phy lane programming.
>
> Bspec: 64539, 64568, 64599, 65100, 65101, 65450, 65451, 67610, 67636
>
> v2: Squash patches related to C10 phy message bus and pll
> programming support (Jani)
> Move register definitions to a new file i.e. intel_cx0_reg_defs.h (Jani)
> Move macro definitions (Jani)
> DP rates as separate patch (Jani)
> Spin out xelpdp register definitions into a separate file (Jani)
> Replace macro to select registers based on phy lane with
> function calls (Jani)
> Fix styling issues (Jani)
> Call XELPDP_PORT_P2M_MSGBUS_STATUS() with port instead of phy (Lucas)
> v3: Move clear request flag into try-loop
> v4: On PHY idle change drm_err_once() as drm_dbg_kms() (Jani)
> use __intel_de_wait_for_register() instead of __intel_wait_for_register
> and uncomment intel_uncore.h (Jani)
> Add DP-alt support for PHY lane programming (Khaled)
>
> Cc: Imre Deak <imre.d...@intel.com>
> Cc: Uma Shankar <uma.shan...@intel.com>
> Signed-off-by: Radhakrishna Sripada <radhakrishna.srip...@intel.com>
> Signed-off-by: Mika Kahola <mika.kah...@intel.com>
> ---
> drivers/gpu/drm/i915/Makefile | 1 +
> drivers/gpu/drm/i915/display/intel_cx0_phy.c | 1120 +++++++++++++++++
> drivers/gpu/drm/i915/display/intel_cx0_phy.h | 43 +
> .../gpu/drm/i915/display/intel_cx0_phy_regs.h | 34 +
> drivers/gpu/drm/i915/display/intel_ddi.c | 22 +-
> .../drm/i915/display/intel_display_power.c | 3 +-
> .../i915/display/intel_display_power_well.c | 2 +-
> .../drm/i915/display/intel_display_types.h | 6 +
> drivers/gpu/drm/i915/display/intel_dpll.c | 22 +-
> drivers/gpu/drm/i915/display/intel_dpll_mgr.c | 2 +-
> .../drm/i915/display/intel_modeset_verify.c | 2 +
> drivers/gpu/drm/i915/i915_reg.h | 5 +
> drivers/gpu/drm/i915/i915_reg_defs.h | 57 +
> 13 files changed, 1314 insertions(+), 5 deletions(-)
> create mode 100644 drivers/gpu/drm/i915/display/intel_cx0_phy.c
> create mode 100644 drivers/gpu/drm/i915/display/intel_cx0_phy.h
>
> diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
> index b2f91a1f8268..b04395472437 100644
> --- a/drivers/gpu/drm/i915/Makefile
> +++ b/drivers/gpu/drm/i915/Makefile
> @@ -294,6 +294,7 @@ i915-y += \
> display/icl_dsi.o \
> display/intel_backlight.o \
> display/intel_crt.o \
> + display/intel_cx0_phy.o \
> display/intel_ddi.o \
> display/intel_ddi_buf_trans.o \
> display/intel_display_trace.o \
> diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy.c
> b/drivers/gpu/drm/i915/display/intel_cx0_phy.c
> new file mode 100644
> index 000000000000..dce55f0ed5e1
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/display/intel_cx0_phy.c
> @@ -0,0 +1,1120 @@
> +// SPDX-License-Identifier: MIT
> +/*
> + * Copyright © 2021 Intel Corporation
> + */
> +
> +#include "i915_reg.h"
> +#include "intel_cx0_phy.h"
> +#include "intel_cx0_phy_regs.h"
> +#include "intel_de.h"
> +#include "intel_display_types.h"
> +#include "intel_dp.h"
> +#include "intel_panel.h"
> +#include "intel_tc.h"
> +
> +bool intel_is_c10phy(struct drm_i915_private *dev_priv, enum phy phy)
> +{
> + if (IS_METEORLAKE(dev_priv) && (phy < PHY_C))
> + return true;
> +
> + return false;
> +}
> +
> +static void intel_cx0_bus_reset(struct drm_i915_private *i915, enum port
> port,
> int lane)
> +{
> + enum phy phy = intel_port_to_phy(i915, port);
> +
> + /* Bring the phy to idle. */
> + intel_de_write(i915, XELPDP_PORT_M2P_MSGBUS_CTL(port, lane-1),
> + XELPDP_PORT_M2P_TRANSACTION_RESET);
> +
> + /* Wait for Idle Clear. */
> + if (intel_de_wait_for_clear(i915,
> XELPDP_PORT_M2P_MSGBUS_CTL(port, lane-1),
> + XELPDP_PORT_M2P_TRANSACTION_RESET,
> + XELPDP_MSGBUS_TIMEOUT_SLOW)) {
> + drm_dbg_kms(&i915->drm, "Failed to bring PHY %c to idle.\n",
> phy_name(phy));
> + return;
> + }
> +
> + intel_de_write(i915, XELPDP_PORT_P2M_MSGBUS_STATUS(port, lane-
> 1), ~0);
> +}
> +
> +static int intel_cx0_wait_for_ack(struct drm_i915_private *i915, enum port
> port, int lane, u32 *val)
> +{
> + enum phy phy = intel_port_to_phy(i915, port);
> +
> + if (__intel_de_wait_for_register(i915,
> +
> XELPDP_PORT_P2M_MSGBUS_STATUS(port, lane-1),
> + XELPDP_PORT_P2M_RESPONSE_READY,
> + XELPDP_PORT_P2M_RESPONSE_READY,
> + XELPDP_MSGBUS_TIMEOUT_FAST_US,
> + XELPDP_MSGBUS_TIMEOUT_SLOW, val)) {
> + drm_dbg_kms(&i915->drm, "PHY %c Timeout waiting for
> message ACK. Status: 0x%x\n", phy_name(phy), *val);
> + return -ETIMEDOUT;
> + }
> +
> + return 0;
> +}
> +
> +static int __intel_cx0_read(struct drm_i915_private *i915, enum port port,
> + int lane, u16 addr, u32 *val)
> +{
> + enum phy phy = intel_port_to_phy(i915, port);
> + int ack;
> +
> + /* Wait for pending transactions.*/
> + if (intel_de_wait_for_clear(i915,
> XELPDP_PORT_M2P_MSGBUS_CTL(port, lane-1),
> +
> XELPDP_PORT_M2P_TRANSACTION_PENDING,
> + XELPDP_MSGBUS_TIMEOUT_SLOW)) {
> + drm_dbg_kms(&i915->drm, "PHY %c Timeout waiting for
> previous transaction to complete. Reset the bus and retry.\n", phy_name(phy));
> + intel_cx0_bus_reset(i915, port, lane);
> + return -ETIMEDOUT;
> + }
> +
> + /* Issue the read command. */
> + intel_de_write(i915, XELPDP_PORT_M2P_MSGBUS_CTL(port, lane-1),
> + XELPDP_PORT_M2P_TRANSACTION_PENDING |
> + XELPDP_PORT_M2P_COMMAND_READ |
> + XELPDP_PORT_M2P_ADDRESS(addr));
> +
> + /* Wait for response ready. And read response.*/
> + ack = intel_cx0_wait_for_ack(i915, port, lane, val);
> + if (ack < 0) {
> + intel_cx0_bus_reset(i915, port, lane);
> + return ack;
> + }
> +
> + /* Check for error. */
> + if (*val & XELPDP_PORT_P2M_ERROR_SET) {
> + drm_dbg_kms(&i915->drm, "PHY %c Error occurred during read
> command. Status: 0x%x\n", phy_name(phy), *val);
> + intel_cx0_bus_reset(i915, port, lane);
> + return -EINVAL;
> + }
> +
> + /* Check for Read Ack. */
> + if (REG_FIELD_GET(XELPDP_PORT_P2M_COMMAND_TYPE_MASK, *val)
> !=
> + XELPDP_PORT_P2M_COMMAND_READ_ACK) {
> + drm_dbg_kms(&i915->drm, "PHY %c Not a Read response.
> MSGBUS Status: 0x%x.\n", phy_name(phy), *val);
> + intel_cx0_bus_reset(i915, port, lane);
> + return -EINVAL;
> + }
> +
> + /* Clear Response Ready flag.*/
> + intel_de_write(i915, XELPDP_PORT_P2M_MSGBUS_STATUS(port, lane-
> 1), ~0);
> +
> + return REG_FIELD_GET(XELPDP_PORT_P2M_DATA_MASK, *val);
> +}
> +
> +static u8 intel_cx0_read(struct drm_i915_private *i915, enum port port,
> + int lane, u16 addr)
> +{
> + enum phy phy = intel_port_to_phy(i915, port);
> + int i, status = 0;
> + u32 val;
> +
> + for (i = 0; i < 3; i++) {
> + status = __intel_cx0_read(i915, port, lane, addr, &val);
> +
> + if (status >= 0)
> + break;
> + }
> +
> + if (i == 3) {
> + drm_err_once(&i915->drm, "PHY %c Read %04x failed after %d
> retries.\n", phy_name(phy), addr, i);
> + return 0;
> + }
> +
> + return status;
> +}
> +
> +static int intel_cx0_wait_cwrite_ack(struct drm_i915_private *i915,
> + enum port port, int lane)
> +{
> + enum phy phy = intel_port_to_phy(i915, port);
> + int ack;
> + u32 val = 0;
> +
> + /* Check for write ack. */
> + ack = intel_cx0_wait_for_ack(i915, port, lane, &val);
> + if (ack < 0)
> + return ack;
> +
> + if ((REG_FIELD_GET(XELPDP_PORT_P2M_COMMAND_TYPE_MASK, val)
> !=
> + XELPDP_PORT_P2M_COMMAND_WRITE_ACK) || val &
> XELPDP_PORT_P2M_ERROR_SET) {
> + drm_dbg_kms(&i915->drm, "PHY %c Unexpected ACK received.
> MSGBUS STATUS: 0x%x.\n", phy_name(phy), val);
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static int __intel_cx0_write_once(struct drm_i915_private *i915, enum port
> port,
> + int lane, u16 addr, u8 data, bool committed)
> +{
> + enum phy phy = intel_port_to_phy(i915, port);
> +
> + /* Wait for pending transactions.*/
> + if (intel_de_wait_for_clear(i915,
> XELPDP_PORT_M2P_MSGBUS_CTL(port, lane-1),
> +
> XELPDP_PORT_M2P_TRANSACTION_PENDING,
> + XELPDP_MSGBUS_TIMEOUT_SLOW)) {
> + drm_dbg_kms(&i915->drm, "PHY %c Timeout waiting for
> previous transaction to complete. Reset the bus and retry.\n", phy_name(phy));
> + intel_cx0_bus_reset(i915, port, lane);
> + return -ETIMEDOUT;
> + }
> +
> + /* Issue the write command. */
> + intel_de_write(i915, XELPDP_PORT_M2P_MSGBUS_CTL(port, lane-1),
> + XELPDP_PORT_M2P_TRANSACTION_PENDING |
> + (committed ?
> XELPDP_PORT_M2P_COMMAND_WRITE_COMMITTED :
> + XELPDP_PORT_M2P_COMMAND_WRITE_UNCOMMITTED)
> |
> + XELPDP_PORT_M2P_DATA(data) |
> + XELPDP_PORT_M2P_ADDRESS(addr));
> +
> + /* Check for error. */
> + if (committed) {
> + if (intel_cx0_wait_cwrite_ack(i915, port, lane) < 0) {
> + intel_cx0_bus_reset(i915, port, lane);
> + return -EINVAL;
> + }
> + } else if ((intel_de_read(i915,
> XELPDP_PORT_P2M_MSGBUS_STATUS(port, lane-1)) &
> + XELPDP_PORT_P2M_ERROR_SET)) {
> + drm_dbg_kms(&i915->drm, "PHY %c Error occurred during write
> command.\n", phy_name(phy));
> + intel_cx0_bus_reset(i915, port, lane);
> + return -EINVAL;
> + }
> +
> + intel_de_write(i915, XELPDP_PORT_P2M_MSGBUS_STATUS(port, lane-
> 1), ~0);
> +
> + return 0;
> +}
> +
> +static void __intel_cx0_write(struct drm_i915_private *i915, enum port port,
> + int lane, u16 addr, u8 data, bool committed)
> +{
> + enum phy phy = intel_port_to_phy(i915, port);
> + int i, status;
> +
> + for (i = 0; i < 3; i++) {
> + status = __intel_cx0_write_once(i915, port, lane, addr, data,
> committed);
> +
> + if (status == 0)
> + break;
> + }
> +
> + if (i == 3) {
> + drm_err_once(&i915->drm, "PHY %c Write %04x failed after %d
> retries.\n", phy_name(phy), addr, i);
> + return;
> + }
> +}
> +
> +static void intel_cx0_write(struct drm_i915_private *i915, enum port port,
> + int lane, u16 addr, u8 data, bool committed)
> +{
> + if (lane & INTEL_CX0_BOTH_LANES) {
> + __intel_cx0_write(i915, port, INTEL_CX0_LANE0, addr, data,
> committed);
> + __intel_cx0_write(i915, port, INTEL_CX0_LANE1, addr, data,
> committed);
> + } else {
> + __intel_cx0_write(i915, port, lane, addr, data, committed);
> + }
> +}
> +
> +static void __intel_cx0_rmw(struct drm_i915_private *i915, enum port port,
> + int lane, u16 addr, u8 clear, u8 set, bool
> committed)
> +{
> + u8 old, val;
> +
> + old = intel_cx0_read(i915, port, lane, addr);
> + val = (old & ~clear) | set;
> +
> + if (val != old)
> + intel_cx0_write(i915, port, lane, addr, val, committed);
> +}
> +
> +static void intel_cx0_rmw(struct drm_i915_private *i915, enum port port,
> + int lane, u16 addr, u8 clear, u8 set, bool committed)
> +{
> + if (lane & INTEL_CX0_BOTH_LANES) {
> + __intel_cx0_rmw(i915, port, INTEL_CX0_LANE0, addr, clear,
> set, committed);
> + __intel_cx0_rmw(i915, port, INTEL_CX0_LANE1, addr, clear,
> set, committed);
> + } else {
> + __intel_cx0_rmw(i915, port, lane, addr, clear, set, committed);
> + }
> +}
> +
> +/*
> + * Basic DP link rates with 38.4 MHz reference clock.
> + * Note: The tables below are with SSC. In non-ssc
> + * registers 0xC04 to 0xC08(pll[4] to pll[8]) will be
> + * programmed 0.
> + */
> +
> +static const struct intel_c10mpllb_state mtl_c10_dp_rbr = {
> + .clock = 162000,
> + .pll[0] = 0xB4,
> + .pll[1] = 0,
> + .pll[2] = 0x30,
> + .pll[3] = 0x1,
> + .pll[4] = 0x26,
> + .pll[5] = 0x0C,
> + .pll[6] = 0x98,
> + .pll[7] = 0x46,
> + .pll[8] = 0x1,
> + .pll[9] = 0x1,
> + .pll[10] = 0,
> + .pll[11] = 0,
> + .pll[12] = 0xC0,
> + .pll[13] = 0,
> + .pll[14] = 0,
> + .pll[15] = 0x2,
> + .pll[16] = 0x84,
> + .pll[17] = 0x4F,
> + .pll[18] = 0xE5,
> + .pll[19] = 0x23,
> +};
> +
> +static const struct intel_c10mpllb_state mtl_c10_edp_r216 = {
> + .clock = 216000,
> + .pll[0] = 0x4,
> + .pll[1] = 0,
> + .pll[2] = 0xA2,
> + .pll[3] = 0x1,
> + .pll[4] = 0x33,
> + .pll[5] = 0x10,
> + .pll[6] = 0x75,
> + .pll[7] = 0xB3,
> + .pll[8] = 0x1,
> + .pll[9] = 0x1,
> + .pll[10] = 0,
> + .pll[11] = 0,
> + .pll[12] = 0,
> + .pll[13] = 0,
> + .pll[14] = 0,
> + .pll[15] = 0x2,
> + .pll[16] = 0x85,
> + .pll[17] = 0x0F,
> + .pll[18] = 0xE6,
> + .pll[19] = 0x23,
> +};
> +
> +static const struct intel_c10mpllb_state mtl_c10_edp_r243 = {
> + .clock = 243000,
> + .pll[0] = 0x34,
> + .pll[1] = 0,
> + .pll[2] = 0xDA,
> + .pll[3] = 0x1,
> + .pll[4] = 0x39,
> + .pll[5] = 0x12,
> + .pll[6] = 0xE3,
> + .pll[7] = 0xE9,
> + .pll[8] = 0x1,
> + .pll[9] = 0x1,
> + .pll[10] = 0,
> + .pll[11] = 0,
> + .pll[12] = 0x20,
> + .pll[13] = 0,
> + .pll[14] = 0,
> + .pll[15] = 0x2,
> + .pll[16] = 0x85,
> + .pll[17] = 0x8F,
> + .pll[18] = 0xE6,
> + .pll[19] = 0x23,
> +};
> +
> +static const struct intel_c10mpllb_state mtl_c10_dp_hbr1 = {
> + .clock = 270000,
> + .pll[0] = 0xF4,
> + .pll[1] = 0,
> + .pll[2] = 0xF8,
> + .pll[3] = 0x0,
> + .pll[4] = 0x20,
> + .pll[5] = 0x0A,
> + .pll[6] = 0x29,
> + .pll[7] = 0x10,
> + .pll[8] = 0x1, /* Verify */
> + .pll[9] = 0x1,
> + .pll[10] = 0,
> + .pll[11] = 0,
> + .pll[12] = 0xA0,
> + .pll[13] = 0,
> + .pll[14] = 0,
> + .pll[15] = 0x1,
> + .pll[16] = 0x84,
> + .pll[17] = 0x4F,
> + .pll[18] = 0xE5,
> + .pll[19] = 0x23,
> +};
> +
> +static const struct intel_c10mpllb_state mtl_c10_edp_r324 = {
> + .clock = 324000,
> + .pll[0] = 0xB4,
> + .pll[1] = 0,
> + .pll[2] = 0x30,
> + .pll[3] = 0x1,
> + .pll[4] = 0x26,
> + .pll[5] = 0x0C,
> + .pll[6] = 0x98,
> + .pll[7] = 0x46,
> + .pll[8] = 0x1,
> + .pll[9] = 0x1,
> + .pll[10] = 0,
> + .pll[11] = 0,
> + .pll[12] = 0xC0,
> + .pll[13] = 0,
> + .pll[14] = 0,
> + .pll[15] = 0x1,
> + .pll[16] = 0x85,
> + .pll[17] = 0x4F,
> + .pll[18] = 0xE6,
> + .pll[19] = 0x23,
> +};
> +
> +static const struct intel_c10mpllb_state mtl_c10_edp_r432 = {
> + .clock = 432000,
> + .pll[0] = 0x4,
> + .pll[1] = 0,
> + .pll[2] = 0xA2,
> + .pll[3] = 0x1,
> + .pll[4] = 0x33,
> + .pll[5] = 0x10,
> + .pll[6] = 0x75,
> + .pll[7] = 0xB3,
> + .pll[8] = 0x1,
> + .pll[9] = 0x1,
> + .pll[10] = 0,
> + .pll[11] = 0,
> + .pll[12] = 0,
> + .pll[13] = 0,
> + .pll[14] = 0,
> + .pll[15] = 0x1,
> + .pll[16] = 0x85,
> + .pll[17] = 0x0F,
> + .pll[18] = 0xE6,
> + .pll[19] = 0x23,
> +};
> +
> +static const struct intel_c10mpllb_state mtl_c10_dp_hbr2 = {
> + .clock = 540000,
> + .pll[0] = 0xF4,
> + .pll[1] = 0,
> + .pll[2] = 0xF8,
> + .pll[3] = 0,
> + .pll[4] = 0x20,
> + .pll[5] = 0x0A,
> + .pll[6] = 0x29,
> + .pll[7] = 0x10,
> + .pll[8] = 0x1,
> + .pll[9] = 0x1,
> + .pll[10] = 0,
> + .pll[11] = 0,
> + .pll[12] = 0xA0,
> + .pll[13] = 0,
> + .pll[14] = 0,
> + .pll[15] = 0,
> + .pll[16] = 0x84,
> + .pll[17] = 0x4F,
> + .pll[18] = 0xE5,
> + .pll[19] = 0x23,
> +};
> +
> +static const struct intel_c10mpllb_state mtl_c10_edp_r675 = {
> + .clock = 675000,
> + .pll[0] = 0xB4,
> + .pll[1] = 0,
> + .pll[2] = 0x3E,
> + .pll[3] = 0x1,
> + .pll[4] = 0xA8,
> + .pll[5] = 0x0C,
> + .pll[6] = 0x33,
> + .pll[7] = 0x54,
> + .pll[8] = 0x1,
> + .pll[9] = 0x1,
> + .pll[10] = 0,
> + .pll[11] = 0,
> + .pll[12] = 0xC8,
> + .pll[13] = 0,
> + .pll[14] = 0,
> + .pll[15] = 0,
> + .pll[16] = 0x85,
> + .pll[17] = 0x8F,
> + .pll[18] = 0xE6,
> + .pll[19] = 0x23,
> +};
> +
> +static const struct intel_c10mpllb_state mtl_c10_dp_hbr3 = {
> + .clock = 810000,
> + .pll[0] = 0x34,
> + .pll[1] = 0,
> + .pll[2] = 0x84,
> + .pll[3] = 0x1,
> + .pll[4] = 0x30,
> + .pll[5] = 0x0F,
> + .pll[6] = 0x3D,
> + .pll[7] = 0x98,
> + .pll[8] = 0x1,
> + .pll[9] = 0x1,
> + .pll[10] = 0,
> + .pll[11] = 0,
> + .pll[12] = 0xF0,
> + .pll[13] = 0,
> + .pll[14] = 0,
> + .pll[15] = 0,
> + .pll[16] = 0x84,
> + .pll[17] = 0x0F,
> + .pll[18] = 0xE5,
> + .pll[19] = 0x23,
> +};
> +
> +static const struct intel_c10mpllb_state * const mtl_c10_dp_tables[] = {
> + &mtl_c10_dp_rbr,
> + &mtl_c10_dp_hbr1,
> + &mtl_c10_dp_hbr2,
> + &mtl_c10_dp_hbr3,
> + NULL,
> +};
> +
> +static const struct intel_c10mpllb_state * const mtl_c10_edp_tables[] = {
> + &mtl_c10_dp_rbr,
> + &mtl_c10_edp_r216,
> + &mtl_c10_edp_r243,
> + &mtl_c10_dp_hbr1,
> + &mtl_c10_edp_r324,
> + &mtl_c10_edp_r432,
> + &mtl_c10_dp_hbr2,
> + &mtl_c10_edp_r675,
> + &mtl_c10_dp_hbr3,
> + NULL,
> +};
> +
> +static const struct intel_c10mpllb_state * const *
> +intel_c10_mpllb_tables_get(struct intel_crtc_state *crtc_state,
> + struct intel_encoder *encoder)
> +{
> + if (intel_crtc_has_dp_encoder(crtc_state)) {
> + if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_EDP))
> + return mtl_c10_edp_tables;
> + else
> + return mtl_c10_dp_tables;
> + }
> +
> + /* TODO: Add HDMI Support */
> + MISSING_CASE(encoder->type);
> + return NULL;
> +}
> +
> +static int intel_c10mpllb_calc_state(struct intel_crtc_state *crtc_state,
> + struct intel_encoder *encoder)
> +{
> + const struct intel_c10mpllb_state * const *tables;
> + int i;
> +
> + tables = intel_c10_mpllb_tables_get(crtc_state, encoder);
> + if (!tables)
> + return -EINVAL;
> +
> + for (i = 0; tables[i]; i++) {
> + if (crtc_state->port_clock <= tables[i]->clock) {
> + crtc_state->c10mpllb_state = *tables[i];
> + return 0;
> + }
> + }
> +
> + return -EINVAL;
> +}
> +
> +int intel_cx0mpllb_calc_state(struct intel_crtc_state *crtc_state,
> + struct intel_encoder *encoder)
> +{
> + struct drm_i915_private *i915 = to_i915(encoder->base.dev);
> + enum phy phy = intel_port_to_phy(i915, encoder->port);
> +
> + drm_WARN_ON(&i915->drm, !intel_is_c10phy(i915, phy));
> +
> + return intel_c10mpllb_calc_state(crtc_state, encoder);
> +}
> +
> +void intel_c10mpllb_readout_hw_state(struct intel_encoder *encoder,
> + struct intel_c10mpllb_state *pll_state)
> +{
> + struct drm_i915_private *i915 = to_i915(encoder->base.dev);
> + struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
> + bool lane_reversal = dig_port->saved_port_bits &
> DDI_BUF_PORT_REVERSAL;
> + u8 lane = lane_reversal ? INTEL_CX0_LANE1 :
> + INTEL_CX0_LANE0;
> + enum phy phy = intel_port_to_phy(i915, encoder->port);
> + int i;
> + u8 cmn, tx0;
> +
> + /*
> + * According to C10 VDR Register programming Sequence we need
> + * to do this to read PHY internal registers from MsgBus.
> + */
> + intel_cx0_rmw(i915, encoder->port, lane, PHY_C10_VDR_CONTROL(1),
> 0,
> + C10_VDR_CTRL_MSGBUS_ACCESS,
> MB_WRITE_COMMITTED);
> +
> + for (i = 0; i < ARRAY_SIZE(pll_state->pll); i++)
> + pll_state->pll[i] = intel_cx0_read(i915, encoder->port, lane,
> + PHY_C10_VDR_PLL(i));
> +
> + cmn = intel_cx0_read(i915, encoder->port, lane,
> PHY_C10_VDR_CMN(0));
> + tx0 = intel_cx0_read(i915, encoder->port, lane, PHY_C10_VDR_TX(0));
> +
> + if (tx0 != C10_TX0_VAL || cmn != C10_CMN0_DP_VAL)
> + drm_warn(&i915->drm, "Unexpected tx: %x or cmn: %x for phy:
> %c.\n",
> + tx0, cmn, phy_name(phy));
> +}
> +
> +static void intel_c10_pll_program(struct drm_i915_private *i915,
> + const struct intel_crtc_state *crtc_state,
> + struct intel_encoder *encoder)
> +{
> + const struct intel_c10mpllb_state *pll_state = &crtc_state-
> >c10mpllb_state;
> + struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
> + bool lane_reversal = dig_port->saved_port_bits &
> DDI_BUF_PORT_REVERSAL;
> + u8 master_lane = lane_reversal ? INTEL_CX0_LANE1 :
> + INTEL_CX0_LANE0;
> + u8 follower_lane = lane_reversal ? INTEL_CX0_LANE0 :
> + INTEL_CX0_LANE1;
> +
> + int i;
> + struct intel_dp *intel_dp;
> + bool use_ssc = false;
> + u8 cmn0 = 0;
> +
> + if (intel_crtc_has_dp_encoder(crtc_state)) {
> + intel_dp = enc_to_intel_dp(encoder);
> + use_ssc = (intel_dp->dpcd[DP_MAX_DOWNSPREAD] &
> + DP_MAX_DOWNSPREAD_0_5);
> +
> + if (!intel_panel_use_ssc(i915))
> + use_ssc = false;
> +
> + cmn0 = C10_CMN0_DP_VAL;
> + }
> +
> + intel_cx0_write(i915, encoder->port, INTEL_CX0_BOTH_LANES,
> PHY_C10_VDR_CONTROL(1),
> + C10_VDR_CTRL_MSGBUS_ACCESS,
> MB_WRITE_COMMITTED);
> + /* Custom width needs to be programmed to 0 for both the phy lanes */
> + intel_cx0_rmw(i915, encoder->port, INTEL_CX0_BOTH_LANES,
> + PHY_C10_VDR_CUSTOM_WIDTH, 0x3, 0,
> MB_WRITE_COMMITTED);
> + intel_cx0_rmw(i915, encoder->port, follower_lane,
> PHY_C10_VDR_CONTROL(1),
> + C10_VDR_CTRL_MASTER_LANE,
> C10_VDR_CTRL_UPDATE_CFG,
> + MB_WRITE_COMMITTED);
> +
> + /* Program the pll values only for the master lane */
> + for (i = 0; i < ARRAY_SIZE(pll_state->pll); i++)
> + /* If not using ssc pll[4] through pll[8] must be 0*/
> + intel_cx0_write(i915, encoder->port, master_lane,
> PHY_C10_VDR_PLL(i),
> + (!use_ssc && (i > 3 && i < 9)) ? 0 : pll_state-
> >pll[i],
> + (i % 4) ? MB_WRITE_UNCOMMITTED :
> MB_WRITE_COMMITTED);
> +
> + intel_cx0_write(i915, encoder->port, master_lane,
> PHY_C10_VDR_CMN(0), cmn0, MB_WRITE_COMMITTED);
> + intel_cx0_write(i915, encoder->port, master_lane,
> PHY_C10_VDR_TX(0), C10_TX0_VAL, MB_WRITE_COMMITTED);
> + intel_cx0_rmw(i915, encoder->port, master_lane,
> PHY_C10_VDR_CONTROL(1),
> + C10_VDR_CTRL_MSGBUS_ACCESS,
> C10_VDR_CTRL_MASTER_LANE |
> + C10_VDR_CTRL_UPDATE_CFG, MB_WRITE_COMMITTED);
> +}
> +
> +void intel_c10mpllb_dump_hw_state(struct drm_i915_private *dev_priv,
> + const struct intel_c10mpllb_state *hw_state)
> +{
> + bool fracen;
> + int i;
> + unsigned int frac_quot = 0, frac_rem = 0, frac_den = 1;
> + unsigned int multiplier, tx_clk_div;
> +
> + fracen = hw_state->pll[0] & C10_PLL0_FRACEN;
> + drm_dbg_kms(&dev_priv->drm, "c10pll_hw_state: fracen: %s, ",
> + str_yes_no(fracen));
> +
> + if (fracen) {
> + frac_quot = hw_state->pll[12] << 8 | hw_state->pll[11];
> + frac_rem = hw_state->pll[14] << 8 | hw_state->pll[13];
> + frac_den = hw_state->pll[10] << 8 | hw_state->pll[9];
> + drm_dbg_kms(&dev_priv->drm, "quot: %u, rem: %u, den:
> %u,\n",
> + frac_quot, frac_rem, frac_den);
> + }
> +
> + multiplier = (REG_FIELD_GET8(C10_PLL3_MULTIPLIERH_MASK,
> hw_state->pll[3]) << 8 |
> + hw_state->pll[2]) / 2 + 16;
> + tx_clk_div = REG_FIELD_GET8(C10_PLL15_TXCLKDIV_MASK, hw_state-
> >pll[15]);
> + drm_dbg_kms(&dev_priv->drm,
> + "multiplier: %u, tx_clk_div: %u.\n", multiplier,
> tx_clk_div);
> +
> + drm_dbg_kms(&dev_priv->drm, "c10pll_rawhw_state:");
> +
> + for (i = 0; i < ARRAY_SIZE(hw_state->pll); i = i + 4)
> + drm_dbg_kms(&dev_priv->drm, "pll[%d] = 0x%x, pll[%d] = 0x%x,
> pll[%d] = 0x%x, pll[%d] = 0x%x\n",
> + i, hw_state->pll[i], i + 1, hw_state->pll[i + 1],
> + i + 2, hw_state->pll[i + 2], i + 3, hw_state->pll[i
> + 3]);
> +}
> +
> +int intel_c10mpllb_calc_port_clock(struct intel_encoder *encoder,
> + const struct intel_c10mpllb_state *pll_state)
> +{
> + unsigned int frac_quot = 0, frac_rem = 0, frac_den = 1;
> + unsigned int multiplier, tx_clk_div, refclk = 38400;
> +
> + if (pll_state->pll[0] & C10_PLL0_FRACEN) {
> + frac_quot = pll_state->pll[12] << 8 | pll_state->pll[11];
> + frac_rem = pll_state->pll[14] << 8 | pll_state->pll[13];
> + frac_den = pll_state->pll[10] << 8 | pll_state->pll[9];
> + }
> +
> + multiplier = (REG_FIELD_GET8(C10_PLL3_MULTIPLIERH_MASK,
> pll_state->pll[3]) << 8 |
> + pll_state->pll[2]) / 2 + 16;
> +
> + tx_clk_div = REG_FIELD_GET8(C10_PLL15_TXCLKDIV_MASK, pll_state-
> >pll[15]);
> +
> + return DIV_ROUND_CLOSEST_ULL(mul_u32_u32(refclk, (multiplier <<
> 16) + frac_quot) +
> + DIV_ROUND_CLOSEST(refclk * frac_rem,
> frac_den),
> + 10 << (tx_clk_div + 16));
> +}
> +
> +static void intel_program_port_clock_ctl(struct intel_encoder *encoder,
> + const struct intel_crtc_state
> *crtc_state,
> + bool lane_reversal)
> +{
> + struct drm_i915_private *i915 = to_i915(encoder->base.dev);
> + struct intel_dp *intel_dp;
> + bool ssc_enabled;
> + u32 val = 0;
> +
> + intel_de_rmw(i915, XELPDP_PORT_BUF_CTL1(encoder->port),
> XELPDP_PORT_REVERSAL,
> + lane_reversal ? XELPDP_PORT_REVERSAL : 0);
> +
> + if (lane_reversal)
> + val |= XELPDP_LANE1_PHY_CLOCK_SELECT;
> +
> + val |= XELPDP_FORWARD_CLOCK_UNGATE;
> + val |=
> XELPDP_DDI_CLOCK_SELECT(XELPDP_DDI_CLOCK_SELECT_MAXPCLK);
> +
> + if (intel_crtc_has_dp_encoder(crtc_state)) {
> + intel_dp = enc_to_intel_dp(encoder);
> + ssc_enabled = intel_dp->dpcd[DP_MAX_DOWNSPREAD] &
> + DP_MAX_DOWNSPREAD_0_5;
> +
> + if (!intel_panel_use_ssc(i915))
> + ssc_enabled = false;
> +
> + /* TODO: DP2.0 10G and 20G rates enable MPLLA*/
> + val |= ssc_enabled ? XELPDP_SSC_ENABLE_PLLB : 0;
> + }
> + intel_de_rmw(i915, XELPDP_PORT_CLOCK_CTL(encoder->port),
> + XELPDP_LANE1_PHY_CLOCK_SELECT |
> + XELPDP_FORWARD_CLOCK_UNGATE |
> + XELPDP_DDI_CLOCK_SELECT_MASK |
> + XELPDP_SSC_ENABLE_PLLB, val);
> +}
> +
> +static u32 intel_cx0_get_powerdown_update(u8 lane)
> +{
> + if (lane & INTEL_CX0_LANE0)
> + return XELPDP_LANE0_POWERDOWN_UPDATE;
> + else if (lane & INTEL_CX0_LANE1)
> + return XELPDP_LANE1_POWERDOWN_UPDATE;
> + else
> + return XELPDP_LANE0_POWERDOWN_UPDATE |
> + XELPDP_LANE1_POWERDOWN_UPDATE;
> +}
> +
> +static u32 intel_cx0_get_powerdown_state(u8 lane, u8 state)
> +{
> + if (lane & INTEL_CX0_LANE0)
> + return XELPDP_LANE0_POWERDOWN_NEW_STATE(state);
> + else if (lane & INTEL_CX0_LANE1)
> + return XELPDP_LANE1_POWERDOWN_NEW_STATE(state);
> + else
> + return XELPDP_LANE0_POWERDOWN_NEW_STATE(state) |
> + XELPDP_LANE1_POWERDOWN_NEW_STATE(state);
> +}
> +
> +static void intel_cx0_powerdown_change_sequence(struct drm_i915_private
> *i915,
> + enum port port,
> + u8 lane, u8 state)
> +{
> + enum phy phy = intel_port_to_phy(i915, port);
> +
> + intel_de_rmw(i915, XELPDP_PORT_BUF_CTL2(port),
> + XELPDP_LANE0_POWERDOWN_NEW_STATE_MASK |
> XELPDP_LANE1_POWERDOWN_NEW_STATE_MASK,
> + intel_cx0_get_powerdown_state(lane, state));
> + intel_de_rmw(i915, XELPDP_PORT_BUF_CTL2(port),
> + XELPDP_LANE0_POWERDOWN_UPDATE |
> XELPDP_LANE1_POWERDOWN_UPDATE,
> + intel_cx0_get_powerdown_update(lane));
> +
> + /* Update Timeout Value */
> + if (__intel_de_wait_for_register(i915, XELPDP_PORT_BUF_CTL2(port),
> + intel_cx0_get_powerdown_update(lane),
> 0,
> +
> XELPDP_PORT_POWERDOWN_UPDATE_TIMEOUT_US, 0, NULL))
> + drm_warn(&i915->drm, "PHY %c failed to bring out of Lane
> reset after %dus.\n",
> + phy_name(phy),
> XELPDP_PORT_RESET_START_TIMEOUT_US);
> +}
> +
> +static void intel_cx0_setup_powerdown(struct drm_i915_private *i915, enum
> port port)
> +{
> + intel_de_rmw(i915, XELPDP_PORT_BUF_CTL2(port),
> + XELPDP_POWER_STATE_READY_MASK,
> + XELPDP_POWER_STATE_READY(CX0_P2_STATE_READY));
> + intel_de_rmw(i915, XELPDP_PORT_BUF_CTL3(port),
> + XELPDP_POWER_STATE_ACTIVE_MASK |
> + XELPDP_PLL_LANE_STAGGERING_DELAY_MASK,
> + XELPDP_POWER_STATE_ACTIVE(CX0_P0_STATE_ACTIVE) |
> + XELPDP_PLL_LANE_STAGGERING_DELAY(0));
> +}
> +
> +static u32 intel_cx0_get_pclk_refclk_request(u8 lane)
> +{
> + if (lane & INTEL_CX0_LANE0)
> + return XELPDP_LANE0_PCLK_REFCLK_REQUEST;
> + else if (lane & INTEL_CX0_LANE1)
> + return XELPDP_LANE1_PCLK_REFCLK_REQUEST;
> + else
> + return XELPDP_LANE0_PCLK_REFCLK_REQUEST |
> + XELPDP_LANE1_PCLK_REFCLK_REQUEST;
> +}
> +
> +static u32 intel_cx0_get_pclk_refclk_ack(u8 lane)
> +{
> + if (lane & INTEL_CX0_LANE0)
> + return XELPDP_LANE0_PCLK_REFCLK_ACK;
> + else if (lane & INTEL_CX0_LANE1)
> + return XELPDP_LANE1_PCLK_REFCLK_ACK;
> + else
> + return XELPDP_LANE0_PCLK_REFCLK_ACK |
> + XELPDP_LANE1_PCLK_REFCLK_ACK;
> +}
> +
> +/* FIXME: Some Type-C cases need not reset both the lanes. Handle those
> cases. */
> +static void intel_cx0_phy_lane_reset(struct drm_i915_private *i915, enum port
> port,
> + bool lane_reversal)
> +{
> + enum phy phy = intel_port_to_phy(i915, port);
> + u8 lane = lane_reversal ? INTEL_CX0_LANE1 :
> + INTEL_CX0_LANE0;
> +
> + if (__intel_de_wait_for_register(i915, XELPDP_PORT_BUF_CTL1(port),
> + XELPDP_PORT_BUF_SOC_PHY_READY,
> + XELPDP_PORT_BUF_SOC_PHY_READY,
> +
> XELPDP_PORT_BUF_SOC_READY_TIMEOUT_US, 0, NULL))
> + drm_warn(&i915->drm, "PHY %c failed to bring out of SOC reset
> after %dus.\n",
> + phy_name(phy),
> XELPDP_PORT_BUF_SOC_READY_TIMEOUT_US);
> +
> + intel_de_rmw(i915, XELPDP_PORT_BUF_CTL2(port),
> + XELPDP_LANE0_PIPE_RESET | XELPDP_LANE1_PIPE_RESET,
> + XELPDP_LANE0_PIPE_RESET | XELPDP_LANE1_PIPE_RESET);
> +
> + if (__intel_de_wait_for_register(i915, XELPDP_PORT_BUF_CTL2(port),
> + XELPDP_LANE0_PHY_CURRENT_STATUS |
> XELPDP_LANE1_PHY_CURRENT_STATUS,
> + XELPDP_LANE0_PHY_CURRENT_STATUS |
> XELPDP_LANE1_PHY_CURRENT_STATUS,
> +
> XELPDP_PORT_RESET_START_TIMEOUT_US, 0, NULL))
> + drm_warn(&i915->drm, "PHY %c failed to bring out of Lane
> reset after %dus.\n",
> + phy_name(phy),
> XELPDP_PORT_RESET_START_TIMEOUT_US);
> +
> + intel_de_rmw(i915, XELPDP_PORT_CLOCK_CTL(port),
> +
> intel_cx0_get_pclk_refclk_request(INTEL_CX0_BOTH_LANES),
> + intel_cx0_get_pclk_refclk_request(lane));
> +
> + if (__intel_de_wait_for_register(i915, XELPDP_PORT_CLOCK_CTL(port),
> +
> intel_cx0_get_pclk_refclk_ack(INTEL_CX0_BOTH_LANES),
> + intel_cx0_get_pclk_refclk_ack(lane),
> + XELPDP_REFCLK_ENABLE_TIMEOUT_US,
> 0, NULL))
> + drm_warn(&i915->drm, "PHY %c failed to request refclk after
> %dus.\n",
> + phy_name(phy),
> XELPDP_REFCLK_ENABLE_TIMEOUT_US);
> +
> + intel_cx0_powerdown_change_sequence(i915, port,
> INTEL_CX0_BOTH_LANES,
> + CX0_P2_STATE_RESET);
> + intel_cx0_setup_powerdown(i915, port);
> +
> + intel_de_rmw(i915, XELPDP_PORT_BUF_CTL2(port),
> + XELPDP_LANE0_PIPE_RESET | XELPDP_LANE1_PIPE_RESET,
> 0);
> +
> + if (intel_de_wait_for_clear(i915, XELPDP_PORT_BUF_CTL2(port),
> + XELPDP_LANE0_PHY_CURRENT_STATUS |
> + XELPDP_LANE1_PHY_CURRENT_STATUS,
> + XELPDP_PORT_RESET_END_TIMEOUT))
> + drm_warn(&i915->drm, "PHY %c failed to bring out of Lane
> reset after %dms.\n",
> + phy_name(phy),
> XELPDP_PORT_RESET_END_TIMEOUT);
> +}
> +
> +static void intel_cx0_program_phy_lane(struct drm_i915_private *i915,
> + struct intel_encoder *encoder, int
> lane_count,
> + bool lane_reversal)
> +{
> + u8 l0t1, l0t2, l1t1, l1t2;
> + bool dp_alt_mode =
> intel_tc_port_in_dp_alt_mode(enc_to_dig_port(encoder));
> + enum port port = encoder->port;
> +
> + intel_cx0_rmw(i915, port, INTEL_CX0_BOTH_LANES,
> PHY_C10_VDR_CONTROL(1),
> + C10_VDR_CTRL_MSGBUS_ACCESS,
> C10_VDR_CTRL_MSGBUS_ACCESS,
> + MB_WRITE_COMMITTED);
> +
> + l0t1 = intel_cx0_read(i915, port, INTEL_CX0_LANE0,
> PHY_CX0_TX_CONTROL(1, 2));
> + l0t2 = intel_cx0_read(i915, port, INTEL_CX0_LANE0,
> PHY_CX0_TX_CONTROL(2, 2));
> + l1t1 = intel_cx0_read(i915, port, INTEL_CX0_LANE1,
> PHY_CX0_TX_CONTROL(1, 2));
> + l1t2 = intel_cx0_read(i915, port, INTEL_CX0_LANE1,
> PHY_CX0_TX_CONTROL(2, 2));
> +
> + if (lane_reversal) {
> + switch (lane_count) {
> + case 1:
> + /* Disable MLs 1(lane0), 2(lane0), 3(lane1) */
> + intel_cx0_write(i915, port, INTEL_CX0_LANE1,
> PHY_CX0_TX_CONTROL(1, 2),
> + l1t1 |
> CONTROL2_DISABLE_SINGLE_TX,
> + MB_WRITE_COMMITTED);
> + fallthrough;
> + case 2:
> + /* Disable MLs 1(lane0), 2(lane0) */
> + intel_cx0_write(i915, port, INTEL_CX0_LANE0,
> PHY_CX0_TX_CONTROL(2, 2),
> + l0t2 |
> CONTROL2_DISABLE_SINGLE_TX,
> + MB_WRITE_COMMITTED);
> + fallthrough;
> + case 3:
> + /* Disable MLs 1(lane0) */
> + intel_cx0_write(i915, port, INTEL_CX0_LANE0,
> PHY_CX0_TX_CONTROL(1, 2),
> + l0t1 |
> CONTROL2_DISABLE_SINGLE_TX,
> + MB_WRITE_COMMITTED);
> + break;
> + }
> + } else {
> + switch (lane_count) {
> + case 1:
> + if (dp_alt_mode) {
> + /* Disable MLs 1(lane0), 3(lane1), 4(lane1) */
> + intel_cx0_write(i915, port, 0,
> PHY_CX0_TX_CONTROL(1, 2),
> + l0t1 |
> CONTROL2_DISABLE_SINGLE_TX,
> + MB_WRITE_COMMITTED);
> + } else {
> + /* Disable MLs 2(lane0), 3(lane1), 4(lane1) */
> + intel_cx0_write(i915, port, 0,
> PHY_CX0_TX_CONTROL(2, 2),
> + l0t2 |
> CONTROL2_DISABLE_SINGLE_TX,
> + MB_WRITE_COMMITTED);
> + }
> + fallthrough;
> + case 2:
> + /* Disable MLs 3(lane1), 4(lane1) */
> + intel_cx0_write(i915, port, INTEL_CX0_LANE1,
> PHY_CX0_TX_CONTROL(1, 2),
> + l1t1 |
> CONTROL2_DISABLE_SINGLE_TX,
> + MB_WRITE_COMMITTED);
> + fallthrough;
> + case 3:
> + /* Disable MLs 4(lane1) */
> + intel_cx0_write(i915, port, INTEL_CX0_LANE1,
> PHY_CX0_TX_CONTROL(2, 2),
> + l1t2 |
> CONTROL2_DISABLE_SINGLE_TX,
> + MB_WRITE_COMMITTED);
> + break;
> + }
> + }
> +
> + if (intel_is_c10phy(i915, intel_port_to_phy(i915, port))) {
> + intel_cx0_rmw(i915, port, INTEL_CX0_LANE1,
> PHY_C10_VDR_CONTROL(1),
> + C10_VDR_CTRL_UPDATE_CFG |
> C10_VDR_CTRL_MSGBUS_ACCESS,
> + C10_VDR_CTRL_UPDATE_CFG,
> MB_WRITE_COMMITTED);
> + intel_cx0_rmw(i915, port, INTEL_CX0_LANE0,
> PHY_C10_VDR_CONTROL(1),
> + C10_VDR_CTRL_UPDATE_CFG |
> C10_VDR_CTRL_MSGBUS_ACCESS,
> + C10_VDR_CTRL_MASTER_LANE |
> C10_VDR_CTRL_UPDATE_CFG, MB_WRITE_COMMITTED);
> + }
> +}
> +
> +static u32 intel_cx0_get_pclk_pll_request(u8 lane)
> +{
> + if (lane & INTEL_CX0_LANE0)
> + return XELPDP_LANE0_PCLK_PLL_REQUEST;
> + else if (lane & INTEL_CX0_LANE1)
> + return XELPDP_LANE1_PCLK_PLL_REQUEST;
> + else
> + return XELPDP_LANE0_PCLK_PLL_REQUEST |
> + XELPDP_LANE1_PCLK_PLL_REQUEST;
> +}
> +
> +static u32 intel_cx0_get_pclk_pll_ack(u8 lane)
> +{
> + if (lane & INTEL_CX0_LANE0)
> + return XELPDP_LANE0_PCLK_PLL_ACK;
> + else if (lane & INTEL_CX0_LANE1)
> + return XELPDP_LANE1_PCLK_PLL_ACK;
> + else
> + return XELPDP_LANE0_PCLK_PLL_ACK |
> + XELPDP_LANE1_PCLK_PLL_ACK;
> +}
> +
> +static void intel_c10pll_enable(struct intel_encoder *encoder,
> + const struct intel_crtc_state *crtc_state)
> +{
> + struct drm_i915_private *i915 = to_i915(encoder->base.dev);
> + enum phy phy = intel_port_to_phy(i915, encoder->port);
> + struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
> + bool lane_reversal = dig_port->saved_port_bits &
> DDI_BUF_PORT_REVERSAL;
> + u8 maxpclk_lane = lane_reversal ? INTEL_CX0_LANE1 :
> + INTEL_CX0_LANE0;
> +
> + /*
> + * 1. Program PORT_CLOCK_CTL REGISTER to configure
> + * clock muxes, gating and SSC
> + */
> + intel_program_port_clock_ctl(encoder, crtc_state, lane_reversal);
> +
> + /* 2. Bring PHY out of reset. */
> + intel_cx0_phy_lane_reset(i915, encoder->port, lane_reversal);
> +
> + /*
> + * 3. Change Phy power state to Ready.
> + * TODO: For DP alt mode use only one lane.
> + */
> + intel_cx0_powerdown_change_sequence(i915, encoder->port,
> INTEL_CX0_BOTH_LANES,
> + CX0_P2_STATE_READY);
> +
> + /* 4. Program PHY internal PLL internal registers. */
> + intel_c10_pll_program(i915, crtc_state, encoder);
> +
> + /*
> + * 5. Program the enabled and disabled owned PHY lane
> + * transmitters over message bus
> + */
> + intel_cx0_program_phy_lane(i915, encoder, crtc_state->lane_count,
> lane_reversal);
> +
> + /*
> + * 6. Follow the Display Voltage Frequency Switching - Sequence
> + * Before Frequency Change. We handle this step in bxt_set_cdclk().
> + */
> +
> + /*
> + * 7. Program DDI_CLK_VALFREQ to match intended DDI
> + * clock frequency.
> + */
> + intel_de_write(i915, DDI_CLK_VALFREQ(encoder->port),
> + crtc_state->port_clock);
> + /*
> + * 8. Set PORT_CLOCK_CTL register PCLK PLL Request
> + * LN<Lane for maxPCLK> to "1" to enable PLL.
> + */
> + intel_de_rmw(i915, XELPDP_PORT_CLOCK_CTL(encoder->port),
> + intel_cx0_get_pclk_pll_request(INTEL_CX0_BOTH_LANES),
> + intel_cx0_get_pclk_pll_request(maxpclk_lane));
> +
> + /* 9. Poll on PORT_CLOCK_CTL PCLK PLL Ack LN<Lane for maxPCLK> ==
> "1". */
> + if (__intel_de_wait_for_register(i915,
> XELPDP_PORT_CLOCK_CTL(encoder->port),
> +
> intel_cx0_get_pclk_pll_ack(INTEL_CX0_BOTH_LANES),
> +
> intel_cx0_get_pclk_pll_ack(maxpclk_lane),
> +
> XELPDP_PCLK_PLL_ENABLE_TIMEOUT_US, 0, NULL))
> + drm_warn(&i915->drm, "Port %c PLL not locked after %dus.\n",
> + phy_name(phy),
> XELPDP_PCLK_PLL_ENABLE_TIMEOUT_US);
> +
> + /*
> + * 10. Follow the Display Voltage Frequency Switching Sequence After
> + * Frequency Change. We handle this step in bxt_set_cdclk().
> + */
> +}
> +
> +void intel_cx0pll_enable(struct intel_encoder *encoder,
> + const struct intel_crtc_state *crtc_state)
> +{
> + struct drm_i915_private *i915 = to_i915(encoder->base.dev);
> + enum phy phy = intel_port_to_phy(i915, encoder->port);
> +
> + drm_WARN_ON(&i915->drm, !intel_is_c10phy(i915, phy));
> + intel_c10pll_enable(encoder, crtc_state);
> +}
> +
> +static void intel_c10pll_disable(struct intel_encoder *encoder)
> +{
> + struct drm_i915_private *i915 = to_i915(encoder->base.dev);
> + enum phy phy = intel_port_to_phy(i915, encoder->port);
> +
> + /* 1. Change owned PHY lane power to Disable state. */
> + intel_cx0_powerdown_change_sequence(i915, encoder->port,
> INTEL_CX0_BOTH_LANES,
> + CX0_P2PG_STATE_DISABLE);
> +
> + /*
> + * 2. Follow the Display Voltage Frequency Switching Sequence Before
> + * Frequency Change. We handle this step in bxt_set_cdclk().
> + */
> +
> + /*
> + * 3. Set PORT_CLOCK_CTL register PCLK PLL Request LN<Lane for
> maxPCLK>
> + * to "0" to disable PLL.
> + */
> + intel_de_rmw(i915, XELPDP_PORT_CLOCK_CTL(encoder->port),
> + intel_cx0_get_pclk_pll_request(INTEL_CX0_BOTH_LANES) |
> +
> intel_cx0_get_pclk_refclk_request(INTEL_CX0_BOTH_LANES), 0);
> +
> + /* 4. Program DDI_CLK_VALFREQ to 0. */
> + intel_de_write(i915, DDI_CLK_VALFREQ(encoder->port), 0);
> +
> + /*
> + * 5. Poll on PORT_CLOCK_CTL PCLK PLL Ack LN<Lane for maxPCLK**>
> == "0".
> + */
> + if (__intel_de_wait_for_register(i915,
> XELPDP_PORT_CLOCK_CTL(encoder->port),
> +
> intel_cx0_get_pclk_pll_ack(INTEL_CX0_BOTH_LANES) |
> +
> intel_cx0_get_pclk_refclk_ack(INTEL_CX0_BOTH_LANES), 0,
> +
> XELPDP_PCLK_PLL_DISABLE_TIMEOUT_US, 0, NULL))
> + drm_warn(&i915->drm, "Port %c PLL not unlocked after
> %dus.\n",
> + phy_name(phy),
> XELPDP_PCLK_PLL_DISABLE_TIMEOUT_US);
> +
> + /*
> + * 6. Follow the Display Voltage Frequency Switching Sequence After
> + * Frequency Change. We handle this step in bxt_set_cdclk().
> + */
> +
> + /* 7. Program PORT_CLOCK_CTL register to disable and gate clocks. */
> + intel_de_rmw(i915, XELPDP_PORT_CLOCK_CTL(encoder->port),
> + XELPDP_DDI_CLOCK_SELECT_MASK |
> + XELPDP_FORWARD_CLOCK_UNGATE, 0);
> +}
> +
> +void intel_cx0pll_disable(struct intel_encoder *encoder)
> +{
> + struct drm_i915_private *i915 = to_i915(encoder->base.dev);
> + enum phy phy = intel_port_to_phy(i915, encoder->port);
> +
> + drm_WARN_ON(&i915->drm, !intel_is_c10phy(i915, phy));
> + intel_c10pll_disable(encoder);
> +}
> +
> +void intel_c10mpllb_state_verify(struct intel_atomic_state *state,
> + struct intel_crtc_state *new_crtc_state)
> +{
> + struct drm_i915_private *i915 = to_i915(state->base.dev);
> + struct intel_c10mpllb_state mpllb_hw_state = { 0 };
> + struct intel_c10mpllb_state *mpllb_sw_state = &new_crtc_state-
> >c10mpllb_state;
> + struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->uapi.crtc);
> + struct intel_encoder *encoder;
> + struct intel_dp *intel_dp;
> + enum phy phy;
> + int i;
> + bool use_ssc = false;
> +
> + if (DISPLAY_VER(i915) < 14)
> + return;
> +
> + if (!new_crtc_state->hw.active)
> + return;
> +
> + encoder = intel_get_crtc_new_encoder(state, new_crtc_state);
> + phy = intel_port_to_phy(i915, encoder->port);
> +
> + if (intel_crtc_has_dp_encoder(new_crtc_state)) {
> + intel_dp = enc_to_intel_dp(encoder);
> + use_ssc = (intel_dp->dpcd[DP_MAX_DOWNSPREAD] &
> + DP_MAX_DOWNSPREAD_0_5);
> +
> + if (!intel_panel_use_ssc(i915))
> + use_ssc = false;
> + }
> +
> + if (!intel_is_c10phy(i915, phy))
> + return;
> +
> + intel_c10mpllb_readout_hw_state(encoder, &mpllb_hw_state);
> +
> + for (i = 0; i < ARRAY_SIZE(mpllb_sw_state->pll); i++) {
> + u8 expected;
> +
> + if (!use_ssc && i > 3 && i < 9)
> + expected = 0;
> + else
> + expected = mpllb_sw_state->pll[i];
> +
> + I915_STATE_WARN(mpllb_hw_state.pll[i] != expected,
> + "[CRTC:%d:%s] mismatch in C10MPLLB:
> Register[%d] (expected 0x%02x, found 0x%02x)",
> + crtc->base.base.id, crtc->base.name,
> + i, expected, mpllb_hw_state.pll[i]);
> + }
> +}
> diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy.h
> b/drivers/gpu/drm/i915/display/intel_cx0_phy.h
> new file mode 100644
> index 000000000000..8cf340509097
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/display/intel_cx0_phy.h
> @@ -0,0 +1,43 @@
> +// SPDX-License-Identifier: MIT
> +/*
> + * Copyright © 2021 Intel Corporation
> + */
> +
> +#ifndef __INTEL_CX0_PHY_H__
> +#define __INTEL_CX0_PHY_H__
> +
> +#include <linux/types.h>
> +#include <linux/bitfield.h>
> +#include <linux/bits.h>
> +
> +#include "i915_drv.h"
> +#include "intel_display_types.h"
> +
> +struct drm_i915_private;
> +struct intel_encoder;
> +struct intel_crtc_state;
> +enum phy;
> +
> +#define INTEL_CX0_LANE0 0x1
> +#define INTEL_CX0_LANE1 0x2
> +#define INTEL_CX0_BOTH_LANES 0x3
> +
> +#define MB_WRITE_COMMITTED 1
> +#define MB_WRITE_UNCOMMITTED 0
> +
> +bool intel_is_c10phy(struct drm_i915_private *dev_priv, enum phy phy);
> +void intel_cx0pll_enable(struct intel_encoder *encoder,
> + const struct intel_crtc_state *crtc_state);
> +void intel_cx0pll_disable(struct intel_encoder *encoder);
> +void intel_c10mpllb_readout_hw_state(struct intel_encoder *encoder,
> + struct intel_c10mpllb_state *pll_state);
> +int intel_cx0mpllb_calc_state(struct intel_crtc_state *crtc_state,
> + struct intel_encoder *encoder);
> +void intel_c10mpllb_dump_hw_state(struct drm_i915_private *dev_priv,
> + const struct intel_c10mpllb_state *hw_state);
> +int intel_c10mpllb_calc_port_clock(struct intel_encoder *encoder,
> + const struct intel_c10mpllb_state
> *pll_state);
> +void intel_c10mpllb_state_verify(struct intel_atomic_state *state,
> + struct intel_crtc_state *new_crtc_state);
> +
> +#endif /* __INTEL_CX0_PHY_H__ */
> diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h
> b/drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h
> index d6b3709d3762..ef629f8b14cf 100644
> --- a/drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h
> +++ b/drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h
> @@ -133,4 +133,38 @@
> #define XELPDP_SSC_ENABLE_PLLA REG_BIT(1)
> #define XELPDP_SSC_ENABLE_PLLB REG_BIT(0)
>
> +/* C10 Vendor Registers */
> +#define PHY_C10_VDR_PLL(idx) (0xC00 + (idx))
> +#define C10_PLL0_FRACEN REG_BIT8(4)
> +#define C10_PLL3_MULTIPLIERH_MASK REG_GENMASK8(3, 0)
> +#define C10_PLL15_TXCLKDIV_MASK REG_GENMASK8(2, 0)
> +
> +#define PHY_C10_VDR_CMN(idx) (0xC20 + (idx))
> +#define C10_CMN0_DP_VAL 0x21
> +#define C10_CMN3_TXVBOOST_MASK REG_GENMASK8(7, 5)
> +#define C10_CMN3_TXVBOOST(val)
> REG_FIELD_PREP8(C10_CMN3_TXVBOOST_MASK, val)
> +
> +#define PHY_C10_VDR_TX(idx) (0xC30 + (idx))
> +#define C10_TX0_VAL 0x10
> +
> +#define PHY_C10_VDR_CONTROL(idx) (0xC70 + (idx) - 1)
> +#define C10_VDR_CTRL_MSGBUS_ACCESS REG_BIT8(2)
> +#define C10_VDR_CTRL_MASTER_LANE REG_BIT8(1)
> +#define C10_VDR_CTRL_UPDATE_CFG REG_BIT8(0)
> +
> +#define PHY_C10_VDR_CUSTOM_WIDTH 0xD02
> +
> +#define CX0_P0_STATE_ACTIVE 0x0
> +#define CX0_P2_STATE_READY 0x2
> +#define CX0_P2PG_STATE_DISABLE 0x9
> +#define CX0_P4PG_STATE_DISABLE 0xC
> +#define CX0_P2_STATE_RESET 0x2
> +
> +/* PHY_C10_VDR_PLL0 */
> +#define PLL_C10_MPLL_SSC_EN REG_BIT8(0)
> +
> +/* PIPE SPEC Defined Registers */
> +#define PHY_CX0_TX_CONTROL(tx, control) (0x400 + ((tx) - 1) * 0x200 +
> (control))
> +#define CONTROL2_DISABLE_SINGLE_TX REG_BIT(6)
> +
> #endif /* __INTEL_CX0_PHY_REGS_H__ */
> diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c
> b/drivers/gpu/drm/i915/display/intel_ddi.c
> index e5979427b38b..d48e1ffdfc71 100644
> --- a/drivers/gpu/drm/i915/display/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/display/intel_ddi.c
> @@ -39,6 +39,7 @@
> #include "intel_combo_phy_regs.h"
> #include "intel_connector.h"
> #include "intel_crtc.h"
> +#include "intel_cx0_phy.h"
> #include "intel_ddi.h"
> #include "intel_ddi_buf_trans.h"
> #include "intel_de.h"
> @@ -3505,6 +3506,21 @@ void intel_ddi_get_clock(struct intel_encoder
> *encoder,
> &crtc_state-
> >dpll_hw_state);
> }
>
> +static void mtl_ddi_get_config(struct intel_encoder *encoder,
> + struct intel_crtc_state *crtc_state)
> +{
> + struct drm_i915_private *i915 = to_i915(encoder->base.dev);
> + enum phy phy = intel_port_to_phy(i915, encoder->port);
> +
> + drm_WARN_ON(&i915->drm, !intel_is_c10phy(i915, phy));
> +
> + intel_c10mpllb_readout_hw_state(encoder, &crtc_state-
> >c10mpllb_state);
> + intel_c10mpllb_dump_hw_state(i915, &crtc_state->c10mpllb_state);
> + crtc_state->port_clock = intel_c10mpllb_calc_port_clock(encoder,
> &crtc_state->c10mpllb_state);
> +
> + intel_ddi_get_config(encoder, crtc_state);
> +}
> +
> static void dg2_ddi_get_config(struct intel_encoder *encoder,
> struct intel_crtc_state *crtc_state)
> {
> @@ -4379,7 +4395,11 @@ void intel_ddi_init(struct drm_i915_private
> *dev_priv, enum port port)
> encoder->cloneable = 0;
> encoder->pipe_mask = ~0;
>
> - if (IS_DG2(dev_priv)) {
> + if (DISPLAY_VER(dev_priv) >= 14) {
> + encoder->enable_clock = intel_cx0pll_enable;
> + encoder->disable_clock = intel_cx0pll_disable;
> + encoder->get_config = mtl_ddi_get_config;
> + } else if (IS_DG2(dev_priv)) {
> encoder->enable_clock = intel_mpllb_enable;
> encoder->disable_clock = intel_mpllb_disable;
> encoder->get_config = dg2_ddi_get_config;
> diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c
> b/drivers/gpu/drm/i915/display/intel_display_power.c
> index 743b919bb2cf..87c7e082a3b4 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_power.c
> +++ b/drivers/gpu/drm/i915/display/intel_display_power.c
> @@ -1613,7 +1613,8 @@ static void icl_display_core_init(struct
> drm_i915_private *dev_priv,
> return;
>
> /* 2. Initialize all combo phys */
> - intel_combo_phy_init(dev_priv);
> + if (DISPLAY_VER(dev_priv) < 14)
> + intel_combo_phy_init(dev_priv);
>
> /*
> * 3. Enable Power Well 1 (PG1).
> diff --git a/drivers/gpu/drm/i915/display/intel_display_power_well.c
> b/drivers/gpu/drm/i915/display/intel_display_power_well.c
> index 49042ece9d1c..3f9a31f1bf4a 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_power_well.c
> +++ b/drivers/gpu/drm/i915/display/intel_display_power_well.c
> @@ -967,7 +967,7 @@ void gen9_disable_dc_states(struct drm_i915_private
> *dev_priv)
> if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv))
> bxt_verify_ddi_phy_power_wells(dev_priv);
>
> - if (DISPLAY_VER(dev_priv) >= 11)
> + if (DISPLAY_VER(dev_priv) >= 11 && DISPLAY_VER(dev_priv) < 14)
> /*
> * DMC retains HW context only for port A, the other combo
> * PHY's HW context for port B is lost after DC transitions,
> diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h
> b/drivers/gpu/drm/i915/display/intel_display_types.h
> index 748b0cd411fa..5dd11d3da2e4 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> @@ -979,6 +979,11 @@ struct intel_link_m_n {
> u32 link_n;
> };
>
> +struct intel_c10mpllb_state {
In order to use a homogeneous name across C10 and C20 phy's,
Can we rename this as intel_c10pll_state? So that it matches intel_c20pll_state
In the C20 patches?
- Radhakrishna(RK) Sripada
> + u32 clock; /* in KHz */
> + u8 pll[20];
> +};
> +
> struct intel_crtc_state {
> /*
> * uapi (drm) state. This is the software state shown to userspace.
> @@ -1122,6 +1127,7 @@ struct intel_crtc_state {
> union {
> struct intel_dpll_hw_state dpll_hw_state;
> struct intel_mpllb_state mpllb_state;
> + struct intel_c10mpllb_state c10mpllb_state;
> };
>
> /*
> diff --git a/drivers/gpu/drm/i915/display/intel_dpll.c
> b/drivers/gpu/drm/i915/display/intel_dpll.c
> index 4e9c18be7e1f..cd3da053055d 100644
> --- a/drivers/gpu/drm/i915/display/intel_dpll.c
> +++ b/drivers/gpu/drm/i915/display/intel_dpll.c
> @@ -8,6 +8,7 @@
>
> #include "i915_reg.h"
> #include "intel_crtc.h"
> +#include "intel_cx0_phy.h"
> #include "intel_de.h"
> #include "intel_display.h"
> #include "intel_display_types.h"
> @@ -995,6 +996,17 @@ static int dg2_crtc_compute_clock(struct
> intel_atomic_state *state,
> return 0;
> }
>
> +static int mtl_crtc_compute_clock(struct intel_atomic_state *state,
> + struct intel_crtc *crtc)
> +{
> + struct intel_crtc_state *crtc_state =
> + intel_atomic_get_new_crtc_state(state, crtc);
> + struct intel_encoder *encoder =
> + intel_get_crtc_new_encoder(state, crtc_state);
> +
> + return intel_cx0mpllb_calc_state(crtc_state, encoder);
> +}
> +
> static bool ilk_needs_fb_cb_tune(const struct dpll *dpll, int factor)
> {
> return dpll->m < factor * dpll->n;
> @@ -1423,6 +1435,10 @@ static int i8xx_crtc_compute_clock(struct
> intel_atomic_state *state,
> return 0;
> }
>
> +static const struct intel_dpll_funcs mtl_dpll_funcs = {
> + .crtc_compute_clock = mtl_crtc_compute_clock,
> +};
> +
> static const struct intel_dpll_funcs dg2_dpll_funcs = {
> .crtc_compute_clock = dg2_crtc_compute_clock,
> };
> @@ -1517,7 +1533,11 @@ int intel_dpll_crtc_get_shared_dpll(struct
> intel_atomic_state *state,
> void
> intel_dpll_init_clock_hook(struct drm_i915_private *dev_priv)
> {
> - if (IS_DG2(dev_priv))
> + if (DISPLAY_VER(dev_priv) >= 14)
> + dev_priv->display.funcs.dpll = &mtl_dpll_funcs;
> + else if (DISPLAY_VER(dev_priv) >= 14)
> + dev_priv->display.funcs.dpll = &mtl_dpll_funcs;
> + else if (IS_DG2(dev_priv))
> dev_priv->display.funcs.dpll = &dg2_dpll_funcs;
> else if (DISPLAY_VER(dev_priv) >= 9 || HAS_DDI(dev_priv))
> dev_priv->display.funcs.dpll = &hsw_dpll_funcs;
> diff --git a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
> b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
> index 22fc908b7e5d..ed372d227aa7 100644
> --- a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
> +++ b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
> @@ -4104,7 +4104,7 @@ void intel_shared_dpll_init(struct drm_i915_private
> *dev_priv)
>
> mutex_init(&dev_priv->display.dpll.lock);
>
> - if (IS_DG2(dev_priv))
> + if (DISPLAY_VER(dev_priv) >= 14 || IS_DG2(dev_priv))
> /* No shared DPLLs on DG2; port PLLs are part of the PHY */
> dpll_mgr = NULL;
> else if (IS_ALDERLAKE_P(dev_priv))
> diff --git a/drivers/gpu/drm/i915/display/intel_modeset_verify.c
> b/drivers/gpu/drm/i915/display/intel_modeset_verify.c
> index 842d70f0dfd2..ec504470c2f0 100644
> --- a/drivers/gpu/drm/i915/display/intel_modeset_verify.c
> +++ b/drivers/gpu/drm/i915/display/intel_modeset_verify.c
> @@ -11,6 +11,7 @@
> #include "intel_atomic.h"
> #include "intel_crtc.h"
> #include "intel_crtc_state_dump.h"
> +#include "intel_cx0_phy.h"
> #include "intel_display.h"
> #include "intel_display_types.h"
> #include "intel_fdi.h"
> @@ -236,6 +237,7 @@ void intel_modeset_verify_crtc(struct intel_crtc *crtc,
> verify_crtc_state(crtc, old_crtc_state, new_crtc_state);
> intel_shared_dpll_state_verify(crtc, old_crtc_state, new_crtc_state);
> intel_mpllb_state_verify(state, new_crtc_state);
> + intel_c10mpllb_state_verify(state, new_crtc_state);
> }
>
> void intel_modeset_verify_disabled(struct drm_i915_private *dev_priv,
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index c1efa655fb68..681a301bb65f 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -2099,6 +2099,11 @@
> #define TRANS_PUSH_EN REG_BIT(31)
> #define TRANS_PUSH_SEND REG_BIT(30)
>
> +/* DDI Buffer Control */
> +#define _DDI_CLK_VALFREQ_A 0x64030
> +#define _DDI_CLK_VALFREQ_B 0x64130
> +#define DDI_CLK_VALFREQ(port) _MMIO_PORT(port,
> _DDI_CLK_VALFREQ_A, _DDI_CLK_VALFREQ_B)
> +
> /*
> * HSW+ eDP PSR registers
> *
> diff --git a/drivers/gpu/drm/i915/i915_reg_defs.h
> b/drivers/gpu/drm/i915/i915_reg_defs.h
> index 983c5aa3045b..940855bfd482 100644
> --- a/drivers/gpu/drm/i915/i915_reg_defs.h
> +++ b/drivers/gpu/drm/i915/i915_reg_defs.h
> @@ -22,6 +22,19 @@
> BUILD_BUG_ON_ZERO(__is_constexpr(__n) && \
> ((__n) < 0 || (__n) > 31))))
>
> +/**
> + * REG_BIT8() - Prepare a u8 bit value
> + * @__n: 0-based bit number
> + *
> + * Local wrapper for BIT() to force u8, with compile time checks.
> + *
> + * @return: Value with bit @__n set.
> + */
> +#define REG_BIT8(__n) \
> + ((u8)(BIT(__n) + \
> + BUILD_BUG_ON_ZERO(__is_constexpr(__n) && \
> + ((__n) < 0 || (__n) > 7))))
> +
> /**
> * REG_GENMASK() - Prepare a continuous u32 bitmask
> * @__high: 0-based high bit
> @@ -52,6 +65,21 @@
> __is_constexpr(__low) && \
> ((__low) < 0 || (__high) > 63 || (__low) >
> (__high)))))
>
> +/**
> + * REG_GENMASK8() - Prepare a continuous u8 bitmask
> + * @__high: 0-based high bit
> + * @__low: 0-based low bit
> + *
> + * Local wrapper for GENMASK() to force u8, with compile time checks.
> + *
> + * @return: Continuous bitmask from @__high to @__low, inclusive.
> + */
> +#define REG_GENMASK8(__high, __low) \
> + ((u8)(GENMASK(__high, __low) + \
> + BUILD_BUG_ON_ZERO(__is_constexpr(__high) && \
> + __is_constexpr(__low) && \
> + ((__low) < 0 || (__high) > 7 || (__low) >
> (__high)))))
> +
> /*
> * Local integer constant expression version of is_power_of_2().
> */
> @@ -74,6 +102,23 @@
> BUILD_BUG_ON_ZERO(!IS_POWER_OF_2((__mask) + (1ULL <<
> __bf_shf(__mask)))) + \
>
> BUILD_BUG_ON_ZERO(__builtin_choose_expr(__is_constexpr(__val),
> (~((__mask) >> __bf_shf(__mask)) & (__val)), 0))))
>
> +/**
> + * REG_FIELD_PREP8() - Prepare a u8 bitfield value
> + * @__mask: shifted mask defining the field's length and position
> + * @__val: value to put in the field
> + *
> + * Local copy of FIELD_PREP8() to generate an integer constant expression,
> force
> + * u8 and for consistency with REG_FIELD_GET8(), REG_BIT8() and
> REG_GENMASK8().
> + *
> + * @return: @__val masked and shifted into the field defined by @__mask.
> + */
> +#define REG_FIELD_PREP8(__mask, __val)
> \
> + ((u8)((((typeof(__mask))(__val) << __bf_shf(__mask)) & (__mask)) +
> \
> + BUILD_BUG_ON_ZERO(!__is_constexpr(__mask)) + \
> + BUILD_BUG_ON_ZERO((__mask) == 0 || (__mask) > U8_MAX) +
> \
> + BUILD_BUG_ON_ZERO(!IS_POWER_OF_2((__mask) + (1ULL <<
> __bf_shf(__mask)))) + \
> +
> BUILD_BUG_ON_ZERO(__builtin_choose_expr(__is_constexpr(__val),
> (~((__mask) >> __bf_shf(__mask)) & (__val)), 0))))
> +
> /**
> * REG_FIELD_GET() - Extract a u32 bitfield value
> * @__mask: shifted mask defining the field's length and position
> @@ -155,6 +200,18 @@
> */
> #define _PICK(__index, ...) (((const u32 []){ __VA_ARGS__ })[__index])
>
> +/**
> + * REG_FIELD_GET8() - Extract a u8 bitfield value
> + * @__mask: shifted mask defining the field's length and position
> + * @__val: value to extract the bitfield value from
> + *
> + * Local wrapper for FIELD_GET() to force u8 and for consistency with
> + * REG_FIELD_PREP(), REG_BIT() and REG_GENMASK().
> + *
> + * @return: Masked and shifted value of the field defined by @__mask in
> @__val.
> + */
> +#define REG_FIELD_GET8(__mask, __val) ((u8)FIELD_GET(__mask, __val))
> +
> typedef struct {
> u32 reg;
> } i915_reg_t;
> --
> 2.34.1
