On Wed, 27 Jul 2022, Radhakrishna Sripada <radhakrishna.sripada@xxxxxxxxx> wrote:
> From: Madhumitha Tolakanahalli Pradeep <madhumitha.tolakanahalli.pradeep@xxxxxxxxx>
>
> In Display version 14, Transcoder Chicken Registers are moved from DPRZ to DRPOS
> to reduce register signal crossings for Unit Interface Optimization.
>
> This patch modifies the CHICKEN_TRANS macro to add a DISPLAY_VER check for
> calculating the correct platform offsets.
>
> (And also updates existing CHICKEN_TRANS occurrences to the new definition)
>
> Bspec: 34387, 50054
> Signed-off-by: Madhumitha Tolakanahalli Pradeep <madhumitha.tolakanahalli.pradeep@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/display/intel_ddi.c | 2 +-
> drivers/gpu/drm/i915/display/intel_display.c | 7 +++---
> drivers/gpu/drm/i915/display/intel_dp_mst.c | 2 +-
> drivers/gpu/drm/i915/display/intel_psr.c | 6 +++--
> drivers/gpu/drm/i915/i915_reg.h | 25 +++++++++++++++-----
> 5 files changed, 29 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
> index a4c8493f3ce7..26c99bfa5ec6 100644
> --- a/drivers/gpu/drm/i915/display/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/display/intel_ddi.c
> @@ -2854,7 +2854,7 @@ gen9_chicken_trans_reg_by_port(struct drm_i915_private *dev_priv,
> if (drm_WARN_ON(&dev_priv->drm, port < PORT_A || port > PORT_E))
> port = PORT_A;
>
> - return CHICKEN_TRANS(trans[port]);
> + return CHICKEN_TRANS(dev_priv, trans[port]);
> }
>
> static void intel_enable_ddi_hdmi(struct intel_atomic_state *state,
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
> index bf170bd83ef7..9e6809d11b02 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -620,7 +620,7 @@ void intel_disable_transcoder(const struct intel_crtc_state *old_crtc_state)
> val &= ~PIPECONF_ENABLE;
>
> if (DISPLAY_VER(dev_priv) >= 12)
> - intel_de_rmw(dev_priv, CHICKEN_TRANS(cpu_transcoder),
> + intel_de_rmw(dev_priv, CHICKEN_TRANS(dev_priv, cpu_transcoder),
> FECSTALL_DIS_DPTSTREAM_DPTTG, 0);
>
> intel_de_write(dev_priv, reg, val);
> @@ -1839,7 +1839,7 @@ static void hsw_set_frame_start_delay(const struct intel_crtc_state *crtc_state)
> {
> struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> - i915_reg_t reg = CHICKEN_TRANS(crtc_state->cpu_transcoder);
> + i915_reg_t reg = CHICKEN_TRANS(dev_priv, crtc_state->cpu_transcoder);
> u32 val;
>
> val = intel_de_read(dev_priv, reg);
> @@ -4127,7 +4127,8 @@ static bool hsw_get_pipe_config(struct intel_crtc *crtc,
> }
>
> if (!transcoder_is_dsi(pipe_config->cpu_transcoder)) {
> - tmp = intel_de_read(dev_priv, CHICKEN_TRANS(pipe_config->cpu_transcoder));
> + tmp = intel_de_read(dev_priv,
> + CHICKEN_TRANS(dev_priv, pipe_config->cpu_transcoder));
>
> pipe_config->framestart_delay = REG_FIELD_GET(HSW_FRAME_START_DELAY_MASK, tmp) + 1;
> } else {
> diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
> index 14d2a64193b2..9c2c032c051c 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
> @@ -591,7 +591,7 @@ static void intel_mst_enable_dp(struct intel_atomic_state *state,
> drm_dp_update_payload_part2(&intel_dp->mst_mgr);
>
> if (DISPLAY_VER(dev_priv) >= 12 && pipe_config->fec_enable)
> - intel_de_rmw(dev_priv, CHICKEN_TRANS(trans), 0,
> + intel_de_rmw(dev_priv, CHICKEN_TRANS(dev_priv, trans), 0,
> FECSTALL_DIS_DPTSTREAM_DPTTG);
>
> intel_enable_transcoder(pipe_config);
> diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
> index 98c3c8015a5c..532d5592c61e 100644
> --- a/drivers/gpu/drm/i915/display/intel_psr.c
> +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> @@ -1139,7 +1139,8 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp,
>
> if (intel_dp->psr.psr2_enabled) {
> if (DISPLAY_VER(dev_priv) == 9)
> - intel_de_rmw(dev_priv, CHICKEN_TRANS(cpu_transcoder), 0,
> + intel_de_rmw(dev_priv,
> + CHICKEN_TRANS(dev_priv, cpu_transcoder), 0,
> PSR2_VSC_ENABLE_PROG_HEADER |
> PSR2_ADD_VERTICAL_LINE_COUNT);
>
> @@ -1149,7 +1150,8 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp,
> * cause issues if non-supported panels are used.
> */
> if (IS_ALDERLAKE_P(dev_priv))
> - intel_de_rmw(dev_priv, CHICKEN_TRANS(cpu_transcoder), 0,
> + intel_de_rmw(dev_priv,
> + CHICKEN_TRANS(dev_priv, cpu_transcoder), 0,
> ADLP_1_BASED_X_GRANULARITY);
>
> /* Wa_16011168373:adl-p */
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 2f9cbdd068e8..3e7dd389ba5b 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -5885,17 +5885,30 @@
> #define SKL_PLANE1_STRETCH_MAX_X1 REG_FIELD_PREP(SKL_PLANE1_STRETCH_MAX_MASK, 3)
> #define CHICKEN_PIPESL_1(pipe) _MMIO_PIPE(pipe, _CHICKEN_PIPESL_1_A, _CHICKEN_PIPESL_1_B)
>
> +#define _MTL_CHICKEN_TRANS_A 0x604e0
> +#define _MTL_CHICKEN_TRANS_B 0x614e0
> +#define _MTL_CHICKEN_TRANS_C 0x624e0
> +#define _MTL_CHICKEN_TRANS_D 0x634e0
> +
> #define _CHICKEN_TRANS_A 0x420c0
> #define _CHICKEN_TRANS_B 0x420c4
> #define _CHICKEN_TRANS_C 0x420c8
> #define _CHICKEN_TRANS_EDP 0x420cc
> #define _CHICKEN_TRANS_D 0x420d8
> -#define CHICKEN_TRANS(trans) _MMIO(_PICK((trans), \
> - [TRANSCODER_EDP] = _CHICKEN_TRANS_EDP, \
> - [TRANSCODER_A] = _CHICKEN_TRANS_A, \
> - [TRANSCODER_B] = _CHICKEN_TRANS_B, \
> - [TRANSCODER_C] = _CHICKEN_TRANS_C, \
> - [TRANSCODER_D] = _CHICKEN_TRANS_D))
> +
> +#define CHICKEN_TRANS(dev_priv, trans) ((DISPLAY_VER(dev_priv) >= 14) ? \
This would be the first such display version check in i915_reg.h. We
have a few platform checks, yes, but generally no.
*Maybe* we'll want to do something like this at some point, but right
now, I think I'd go for adding a separate MTL_CHICKEN_TRANS() and using
that where appropriate.
BR,
Jani.
> + _MMIO(_PICK((trans), \
> + [TRANSCODER_A] = _MTL_CHICKEN_TRANS_A, \
> + [TRANSCODER_B] = _MTL_CHICKEN_TRANS_B, \
> + [TRANSCODER_C] = _MTL_CHICKEN_TRANS_C, \
> + [TRANSCODER_D] = _MTL_CHICKEN_TRANS_D)) : \
> + _MMIO(_PICK((trans), \
> + [TRANSCODER_EDP] = _CHICKEN_TRANS_EDP, \
> + [TRANSCODER_A] = _CHICKEN_TRANS_A, \
> + [TRANSCODER_B] = _CHICKEN_TRANS_B, \
> + [TRANSCODER_C] = _CHICKEN_TRANS_C, \
> + [TRANSCODER_D] = _CHICKEN_TRANS_D)))
> +
> #define HSW_FRAME_START_DELAY_MASK REG_GENMASK(28, 27)
> #define HSW_FRAME_START_DELAY(x) REG_FIELD_PREP(HSW_FRAME_START_DELAY_MASK, x)
> #define VSC_DATA_SEL_SOFTWARE_CONTROL REG_BIT(25) /* GLK */
--
Jani Nikula, Intel Open Source Graphics Center
