From 8f19b401a6fc6d1262c5bfbfc18146c5e8ecb491 Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Mon, 19 Nov 2018 20:00:21 +0200 Subject: [PATCH] drm/i915: Make CHICKEN_TRANS reg not depend on enum value MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Depending on the transcoder enum values to translate from transcoder to the corresponding CHICKEN_TRANS register can easily break if we add a new transcoder. Add an explicit mapping instead, by using helpers to look up the register instance either by transcoder or port (since unconveniently the registers have both port and transcoder specific bits). While at it also check for the correctness of GEN, port, transcoder. I wasn't sure if psr2_enabled can only be set for GEN9+, but that seems to be the case indeed (see setting of sink_psr2_support in intel_psr_init_dpcd()). v2 (Ville): - Make gen9_chicken_trans_reg() internal to intel_psr.c. - s/trans/cpu_transcoder/ Cc: Ville Syrjälä Cc: Lucas De Marchi Cc: Mika Kahola Signed-off-by: Imre Deak Reviewed-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20181119180021.370-1-imre.deak@intel.com --- drivers/gpu/drm/i915/i915_reg.h | 7 +++--- drivers/gpu/drm/i915/intel_ddi.c | 37 +++++++++++++++++++++----------- drivers/gpu/drm/i915/intel_psr.c | 25 +++++++++++++++++++-- 3 files changed, 52 insertions(+), 17 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index e6b371e986ee..47baf2fe8f71 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -7399,9 +7399,10 @@ enum { #define BDW_DPRS_MASK_VBLANK_SRD (1 << 0) #define CHICKEN_PIPESL_1(pipe) _MMIO_PIPE(pipe, _CHICKEN_PIPESL_1_A, _CHICKEN_PIPESL_1_B) -#define CHICKEN_TRANS_A 0x420c0 -#define CHICKEN_TRANS_B 0x420c4 -#define CHICKEN_TRANS(trans) _MMIO_TRANS(trans, CHICKEN_TRANS_A, CHICKEN_TRANS_B) +#define CHICKEN_TRANS_A _MMIO(0x420c0) +#define CHICKEN_TRANS_B _MMIO(0x420c4) +#define CHICKEN_TRANS_C _MMIO(0x420c8) +#define CHICKEN_TRANS_EDP _MMIO(0x420cc) #define VSC_DATA_SEL_SOFTWARE_CONTROL (1 << 25) /* GLK and CNL+ */ #define DDI_TRAINING_OVERRIDE_ENABLE (1 << 19) #define DDI_TRAINING_OVERRIDE_VALUE (1 << 18) diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index 040483c96029..ad11540ac436 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -3380,6 +3380,26 @@ static void intel_enable_ddi_dp(struct intel_encoder *encoder, intel_audio_codec_enable(encoder, crtc_state, conn_state); } +static i915_reg_t +gen9_chicken_trans_reg_by_port(struct drm_i915_private *dev_priv, + enum port port) +{ + static const i915_reg_t regs[] = { + [PORT_A] = CHICKEN_TRANS_EDP, + [PORT_B] = CHICKEN_TRANS_A, + [PORT_C] = CHICKEN_TRANS_B, + [PORT_D] = CHICKEN_TRANS_C, + [PORT_E] = CHICKEN_TRANS_A, + }; + + WARN_ON(INTEL_GEN(dev_priv) < 9); + + if (WARN_ON(port < PORT_A || port > PORT_E)) + port = PORT_A; + + return regs[port]; +} + static void intel_enable_ddi_hdmi(struct intel_encoder *encoder, const struct intel_crtc_state *crtc_state, const struct drm_connector_state *conn_state) @@ -3403,17 +3423,10 @@ static void intel_enable_ddi_hdmi(struct intel_encoder *encoder, * the bits affect a specific DDI port rather than * a specific transcoder. */ - static const enum transcoder port_to_transcoder[] = { - [PORT_A] = TRANSCODER_EDP, - [PORT_B] = TRANSCODER_A, - [PORT_C] = TRANSCODER_B, - [PORT_D] = TRANSCODER_C, - [PORT_E] = TRANSCODER_A, - }; - enum transcoder transcoder = port_to_transcoder[port]; + i915_reg_t reg = gen9_chicken_trans_reg_by_port(dev_priv, port); u32 val; - val = I915_READ(CHICKEN_TRANS(transcoder)); + val = I915_READ(reg); if (port == PORT_E) val |= DDIE_TRAINING_OVERRIDE_ENABLE | @@ -3422,8 +3435,8 @@ static void intel_enable_ddi_hdmi(struct intel_encoder *encoder, val |= DDI_TRAINING_OVERRIDE_ENABLE | DDI_TRAINING_OVERRIDE_VALUE; - I915_WRITE(CHICKEN_TRANS(transcoder), val); - POSTING_READ(CHICKEN_TRANS(transcoder)); + I915_WRITE(reg, val); + POSTING_READ(reg); udelay(1); @@ -3434,7 +3447,7 @@ static void intel_enable_ddi_hdmi(struct intel_encoder *encoder, val &= ~(DDI_TRAINING_OVERRIDE_ENABLE | DDI_TRAINING_OVERRIDE_VALUE); - I915_WRITE(CHICKEN_TRANS(transcoder), val); + I915_WRITE(reg, val); } /* In HDMI/DVI mode, the port width, and swing/emphasis values diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c index 26292961d693..54fa17a5596a 100644 --- a/drivers/gpu/drm/i915/intel_psr.c +++ b/drivers/gpu/drm/i915/intel_psr.c @@ -577,6 +577,25 @@ static void intel_psr_activate(struct intel_dp *intel_dp) dev_priv->psr.active = true; } +static i915_reg_t gen9_chicken_trans_reg(struct drm_i915_private *dev_priv, + enum transcoder cpu_transcoder) +{ + static const i915_reg_t regs[] = { + [TRANSCODER_A] = CHICKEN_TRANS_A, + [TRANSCODER_B] = CHICKEN_TRANS_B, + [TRANSCODER_C] = CHICKEN_TRANS_C, + [TRANSCODER_EDP] = CHICKEN_TRANS_EDP, + }; + + WARN_ON(INTEL_GEN(dev_priv) < 9); + + if (WARN_ON(cpu_transcoder >= ARRAY_SIZE(regs) || + !regs[cpu_transcoder].reg)) + cpu_transcoder = TRANSCODER_A; + + return regs[cpu_transcoder]; +} + static void intel_psr_enable_source(struct intel_dp *intel_dp, const struct intel_crtc_state *crtc_state) { @@ -591,7 +610,9 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp, hsw_psr_setup_aux(intel_dp); if (dev_priv->psr.psr2_enabled) { - u32 chicken = I915_READ(CHICKEN_TRANS(cpu_transcoder)); + i915_reg_t reg = gen9_chicken_trans_reg(dev_priv, + cpu_transcoder); + u32 chicken = I915_READ(reg); if (IS_GEN9(dev_priv) && !IS_GEMINILAKE(dev_priv)) chicken |= (PSR2_VSC_ENABLE_PROG_HEADER @@ -599,7 +620,7 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp, else chicken &= ~VSC_DATA_SEL_SOFTWARE_CONTROL; - I915_WRITE(CHICKEN_TRANS(cpu_transcoder), chicken); + I915_WRITE(reg, chicken); } /*