From 69e807a5a9ffe595853277cb00d7d3fdd583b0fa Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Thu, 3 Mar 2022 20:19:27 +0200 Subject: [PATCH] drm/i915/gmbus: combine gmbus pin lookups to one function MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Combine the platform specific if ladders for array lookup and size checks into one. This is cleaner and avoids duplication, but hopefully also helps any static analyzers that seem to have trouble with the bounds checks. Signed-off-by: Jani Nikula Reviewed-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20220303181931.1661767-1-jani.nikula@intel.com --- drivers/gpu/drm/i915/display/intel_gmbus.c | 62 ++++++++++------------ 1 file changed, 29 insertions(+), 33 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_gmbus.c b/drivers/gpu/drm/i915/display/intel_gmbus.c index 2fad03250661a..9cbf7f9a1e2e3 100644 --- a/drivers/gpu/drm/i915/display/intel_gmbus.c +++ b/drivers/gpu/drm/i915/display/intel_gmbus.c @@ -106,51 +106,47 @@ static const struct gmbus_pin gmbus_pins_dg2[] = { [GMBUS_PIN_9_TC1_ICP] = { "tc1", GPIOJ }, }; -/* pin is expected to be valid */ -static const struct gmbus_pin *get_gmbus_pin(struct drm_i915_private *dev_priv, +static const struct gmbus_pin *get_gmbus_pin(struct drm_i915_private *i915, unsigned int pin) { - if (INTEL_PCH_TYPE(dev_priv) >= PCH_DG2) - return &gmbus_pins_dg2[pin]; - else if (INTEL_PCH_TYPE(dev_priv) >= PCH_DG1) - return &gmbus_pins_dg1[pin]; - else if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP) - return &gmbus_pins_icp[pin]; - else if (HAS_PCH_CNP(dev_priv)) - return &gmbus_pins_cnp[pin]; - else if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) - return &gmbus_pins_bxt[pin]; - else if (DISPLAY_VER(dev_priv) == 9) - return &gmbus_pins_skl[pin]; - else if (IS_BROADWELL(dev_priv)) - return &gmbus_pins_bdw[pin]; - else - return &gmbus_pins[pin]; -} - -bool intel_gmbus_is_valid_pin(struct drm_i915_private *dev_priv, - unsigned int pin) -{ - unsigned int size; + const struct gmbus_pin *pins; + size_t size; - if (INTEL_PCH_TYPE(dev_priv) >= PCH_DG2) + if (INTEL_PCH_TYPE(i915) >= PCH_DG2) { + pins = gmbus_pins_dg2; size = ARRAY_SIZE(gmbus_pins_dg2); - else if (INTEL_PCH_TYPE(dev_priv) >= PCH_DG1) + } else if (INTEL_PCH_TYPE(i915) >= PCH_DG1) { + pins = gmbus_pins_dg1; size = ARRAY_SIZE(gmbus_pins_dg1); - else if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP) + } else if (INTEL_PCH_TYPE(i915) >= PCH_ICP) { + pins = gmbus_pins_icp; size = ARRAY_SIZE(gmbus_pins_icp); - else if (HAS_PCH_CNP(dev_priv)) + } else if (HAS_PCH_CNP(i915)) { + pins = gmbus_pins_cnp; size = ARRAY_SIZE(gmbus_pins_cnp); - else if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) + } else if (IS_GEMINILAKE(i915) || IS_BROXTON(i915)) { + pins = gmbus_pins_bxt; size = ARRAY_SIZE(gmbus_pins_bxt); - else if (DISPLAY_VER(dev_priv) == 9) + } else if (DISPLAY_VER(i915) == 9) { + pins = gmbus_pins_skl; size = ARRAY_SIZE(gmbus_pins_skl); - else if (IS_BROADWELL(dev_priv)) + } else if (IS_BROADWELL(i915)) { + pins = gmbus_pins_bdw; size = ARRAY_SIZE(gmbus_pins_bdw); - else + } else { + pins = gmbus_pins; size = ARRAY_SIZE(gmbus_pins); + } + + if (pin >= size || !pins[pin].name) + return NULL; - return pin < size && get_gmbus_pin(dev_priv, pin)->name; + return &pins[pin]; +} + +bool intel_gmbus_is_valid_pin(struct drm_i915_private *i915, unsigned int pin) +{ + return get_gmbus_pin(i915, pin); } /* Intel GPIO access functions */ -- 2.30.2