From 1c109be9218974a70d4fd0b24530f74e5d5c179d Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Tue, 31 May 2022 19:25:27 +0300
Subject: drm/i915/display: stop using BUG()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Git-commit: 04514c14678e760e17e3cd44c553ade1bf3bef06
Patch-mainline: v6.0-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225 jsc#PED-2849
Avoid bringing the entire machine down even if there's a bug that
shouldn't happen, but won't corrupt the system either. Log them loudly
and limp on.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220531162527.1062319-1-jani.nikula@intel.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/i915/display/intel_ddi.c | 11 ++++++-----
drivers/gpu/drm/i915/display/intel_display.c | 19 +++++++++++--------
.../drm/i915/display/intel_display_types.h | 15 +++++++++------
3 files changed, 26 insertions(+), 19 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 333871cf3a2c..915e8e3e8f38 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -455,6 +455,9 @@ intel_ddi_transcoder_func_reg_val_get(struct intel_encoder *encoder,
temp |= TRANS_DDI_SELECT_PORT(port);
switch (crtc_state->pipe_bpp) {
+ default:
+ MISSING_CASE(crtc_state->pipe_bpp);
+ fallthrough;
case 18:
temp |= TRANS_DDI_BPC_6;
break;
@@ -467,8 +470,6 @@ intel_ddi_transcoder_func_reg_val_get(struct intel_encoder *encoder,
case 36:
temp |= TRANS_DDI_BPC_12;
break;
- default:
- BUG();
}
if (crtc_state->hw.adjusted_mode.flags & DRM_MODE_FLAG_PVSYNC)
@@ -478,6 +479,9 @@ intel_ddi_transcoder_func_reg_val_get(struct intel_encoder *encoder,
if (cpu_transcoder == TRANSCODER_EDP) {
switch (pipe) {
+ default:
+ MISSING_CASE(pipe);
+ fallthrough;
case PIPE_A:
/* On Haswell, can only use the always-on power well for
* eDP when not using the panel fitter, and when not
@@ -494,9 +498,6 @@ intel_ddi_transcoder_func_reg_val_get(struct intel_encoder *encoder,
case PIPE_C:
temp |= TRANS_DDI_EDP_INPUT_C_ONOFF;
break;
- default:
- BUG();
- break;
}
}
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index e71b69425309..186b37925d23 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -500,6 +500,9 @@ void vlv_wait_port_ready(struct drm_i915_private *dev_priv,
i915_reg_t dpll_reg;
switch (dig_port->base.port) {
+ default:
+ MISSING_CASE(dig_port->base.port);
+ fallthrough;
case PORT_B:
port_mask = DPLL_PORTB_READY_MASK;
dpll_reg = DPLL(0);
@@ -513,8 +516,6 @@ void vlv_wait_port_ready(struct drm_i915_private *dev_priv,
port_mask = DPLL_PORTD_READY_MASK;
dpll_reg = DPIO_PHY_STATUS;
break;
- default:
- BUG();
}
if (intel_de_wait_for_register(dev_priv, dpll_reg,
@@ -3159,6 +3160,10 @@ static void i9xx_set_pipeconf(const struct intel_crtc_state *crtc_state)
PIPECONF_DITHER_TYPE_SP;
switch (crtc_state->pipe_bpp) {
+ default:
+ /* Case prevented by intel_choose_pipe_bpp_dither. */
+ MISSING_CASE(crtc_state->pipe_bpp);
+ fallthrough;
case 18:
pipeconf |= PIPECONF_BPC_6;
break;
@@ -3168,9 +3173,6 @@ static void i9xx_set_pipeconf(const struct intel_crtc_state *crtc_state)
case 30:
pipeconf |= PIPECONF_BPC_10;
break;
- default:
- /* Case prevented by intel_choose_pipe_bpp_dither. */
- BUG();
}
}
@@ -3466,6 +3468,10 @@ static void ilk_set_pipeconf(const struct intel_crtc_state *crtc_state)
val = 0;
switch (crtc_state->pipe_bpp) {
+ default:
+ /* Case prevented by intel_choose_pipe_bpp_dither. */
+ MISSING_CASE(crtc_state->pipe_bpp);
+ fallthrough;
case 18:
val |= PIPECONF_BPC_6;
break;
@@ -3478,9 +3484,6 @@ static void ilk_set_pipeconf(const struct intel_crtc_state *crtc_state)
case 36:
val |= PIPECONF_BPC_12;
break;
- default:
- /* Case prevented by intel_choose_pipe_bpp_dither. */
- BUG();
}
if (crtc_state->dither)
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index cf05ece6a115..6de4b57777f8 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1799,13 +1799,14 @@ static inline enum dpio_channel
vlv_dig_port_to_channel(struct intel_digital_port *dig_port)
{
switch (dig_port->base.port) {
+ default:
+ MISSING_CASE(dig_port->base.port);
+ fallthrough;
case PORT_B:
case PORT_D:
return DPIO_CH0;
case PORT_C:
return DPIO_CH1;
- default:
- BUG();
}
}
@@ -1813,13 +1814,14 @@ static inline enum dpio_phy
vlv_dig_port_to_phy(struct intel_digital_port *dig_port)
{
switch (dig_port->base.port) {
+ default:
+ MISSING_CASE(dig_port->base.port);
+ fallthrough;
case PORT_B:
case PORT_C:
return DPIO_PHY0;
case PORT_D:
return DPIO_PHY1;
- default:
- BUG();
}
}
@@ -1827,13 +1829,14 @@ static inline enum dpio_channel
vlv_pipe_to_channel(enum pipe pipe)
{
switch (pipe) {
+ default:
+ MISSING_CASE(pipe);
+ fallthrough;
case PIPE_A:
case PIPE_C:
return DPIO_CH0;
case PIPE_B:
return DPIO_CH1;
- default:
- BUG();
}
}
--
2.38.1