On Tue, Feb 21, 2023 at 12:18:36PM -0800, Matt Roper wrote:
> The bspec was updated with a minor change to the 'DCC mode select'
> setting to be programmed during combo PHY initialization.
>
> v2:
> - Keep the opencoded rmw behavior instead of switching to
>intel_de_rmw(). We need to read from a _LN register, but write to
>the _GRP register to update all lanes.
>
> Bspec: 49291
Reviewed-by: Matt Atwood
> Signed-off-by: Matt Roper
> ---
> drivers/gpu/drm/i915/display/intel_combo_phy.c | 5 ++---
> drivers/gpu/drm/i915/display/intel_combo_phy_regs.h | 4 ++--
> 2 files changed, 4 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_combo_phy.c
> b/drivers/gpu/drm/i915/display/intel_combo_phy.c
> index 27e98eabb006..922a6d87b553 100644
> --- a/drivers/gpu/drm/i915/display/intel_combo_phy.c
> +++ b/drivers/gpu/drm/i915/display/intel_combo_phy.c
> @@ -233,8 +233,7 @@ static bool icl_combo_phy_verify_state(struct
> drm_i915_private *dev_priv,
>ICL_PORT_TX_DW8_ODCC_CLK_DIV_SEL_DIV2);
>
> ret &= check_phy_reg(dev_priv, phy, ICL_PORT_PCS_DW1_LN(0, phy),
> - DCC_MODE_SELECT_MASK,
> - DCC_MODE_SELECT_CONTINUOSLY);
> + DCC_MODE_SELECT_MASK, RUN_DCC_ONCE);
> }
>
> ret &= icl_verify_procmon_ref_values(dev_priv, phy);
> @@ -354,7 +353,7 @@ static void icl_combo_phys_init(struct drm_i915_private
> *dev_priv)
>
> val = intel_de_read(dev_priv, ICL_PORT_PCS_DW1_LN(0,
> phy));
> val &= ~DCC_MODE_SELECT_MASK;
> - val |= DCC_MODE_SELECT_CONTINUOSLY;
> + val |= RUN_DCC_ONCE;
> intel_de_write(dev_priv, ICL_PORT_PCS_DW1_GRP(phy),
> val);
> }
>
> diff --git a/drivers/gpu/drm/i915/display/intel_combo_phy_regs.h
> b/drivers/gpu/drm/i915/display/intel_combo_phy_regs.h
> index 2ed65193ca19..b0983edccf3f 100644
> --- a/drivers/gpu/drm/i915/display/intel_combo_phy_regs.h
> +++ b/drivers/gpu/drm/i915/display/intel_combo_phy_regs.h
> @@ -90,8 +90,8 @@
> #define ICL_PORT_PCS_DW1_AUX(phy)_MMIO(_ICL_PORT_PCS_DW_AUX(1,
> phy))
> #define ICL_PORT_PCS_DW1_GRP(phy)_MMIO(_ICL_PORT_PCS_DW_GRP(1,
> phy))
> #define ICL_PORT_PCS_DW1_LN(ln, phy) _MMIO(_ICL_PORT_PCS_DW_LN(1,
> ln, phy))
> -#define DCC_MODE_SELECT_MASK (0x3 << 20)
> -#define DCC_MODE_SELECT_CONTINUOSLY(0x3 << 20)
> +#define DCC_MODE_SELECT_MASK REG_GENMASK(21, 20)
> +#define RUN_DCC_ONCE
> REG_FIELD_PREP(DCC_MODE_SELECT_MASK, 0)
> #define COMMON_KEEPER_EN (1 << 26)
> #define LATENCY_OPTIM_MASK (0x3 << 2)
> #define LATENCY_OPTIM_VAL(x) ((x) << 2)
> --
> 2.39.1
>
