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drm/i915/bios: use ddc pin directly from child data 

Avoid extra caching of the data. This is slightly more subtle than one
would think. For one thing, we explicitly ignore 0 value in child device
ddc pin; this is specified as N/A and does not warrant a warning. For
another, we start looking for ddc pin collisions in sanitize using
unmapped pin numbering.

v2: Check !devdata in intel_bios_alternate_ddc_pin()

Cc: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/e1dbf7cbdd2191439e760ab9098242dcec5fbb2e.1630512523.git.jani.nikula@intel.com
This commit is contained in:
Jani Nikula 2021-09-01 19:10:04 +03:00
parent 9e1dbc1a84
commit dab8477b03
2 changed files with 28 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
drivers/gpu/drm/i915/display/intel_bios.c
View File

@ -1589,28 +1589,43 @@ static enum port get_port_by_ddc_pin(struct drm_i915_private *i915, u8 ddc_pin)
for_each_port(port) {
info = &i915->vbt.ddi_port_info[port];
if (info->devdata && ddc_pin == info->alternate_ddc_pin)
if (info->devdata && ddc_pin == info->devdata->child.ddc_pin)
return port;
}
return PORT_NONE;
}
static void sanitize_ddc_pin(struct drm_i915_private *i915,
static void sanitize_ddc_pin(struct intel_bios_encoder_data *devdata,
enum port port)
{
struct ddi_vbt_port_info *info = &i915->vbt.ddi_port_info[port];
struct drm_i915_private *i915 = devdata->i915;
struct ddi_vbt_port_info *info;
struct child_device_config *child;
u8 mapped_ddc_pin;
enum port p;
p = get_port_by_ddc_pin(i915, info->alternate_ddc_pin);
if (!devdata->child.ddc_pin)
return;
mapped_ddc_pin = map_ddc_pin(i915, devdata->child.ddc_pin);
if (!intel_gmbus_is_valid_pin(i915, mapped_ddc_pin)) {
drm_dbg_kms(&i915->drm,
"Port %c has invalid DDC pin %d, "
"sticking to defaults\n",
port_name(port), mapped_ddc_pin);
devdata->child.ddc_pin = 0;
return;
}
p = get_port_by_ddc_pin(i915, devdata->child.ddc_pin);
if (p == PORT_NONE)
return;
drm_dbg_kms(&i915->drm,
"port %c trying to use the same DDC pin (0x%x) as port %c, "
"disabling port %c DVI/HDMI support\n",
port_name(port), info->alternate_ddc_pin,
port_name(port), mapped_ddc_pin,
port_name(p), port_name(p));
/*
@ -1628,7 +1643,7 @@ static void sanitize_ddc_pin(struct drm_i915_private *i915,
child->device_type &= ~DEVICE_TYPE_TMDS_DVI_SIGNALING;
child->device_type |= DEVICE_TYPE_NOT_HDMI_OUTPUT;
info->alternate_ddc_pin = 0;
child->ddc_pin = 0;
}
static enum port get_port_by_aux_ch(struct drm_i915_private *i915, u8 aux_ch)
@ -1966,20 +1981,8 @@ static void parse_ddi_port(struct drm_i915_private *i915,
supports_typec_usb, supports_tbt,
devdata->dsc != NULL);
if (is_dvi) {
u8 ddc_pin;
ddc_pin = map_ddc_pin(i915, child->ddc_pin);
if (intel_gmbus_is_valid_pin(i915, ddc_pin)) {
info->alternate_ddc_pin = ddc_pin;
sanitize_ddc_pin(i915, port);
} else {
drm_dbg_kms(&i915->drm,
"Port %c has invalid DDC pin %d, "
"sticking to defaults\n",
port_name(port), ddc_pin);
}
}
if (is_dvi)
sanitize_ddc_pin(devdata, port);
if (is_dp)
sanitize_aux_ch(devdata, port);
@ -2993,8 +2996,12 @@ int intel_bios_dp_max_link_rate(struct intel_encoder *encoder)
int intel_bios_alternate_ddc_pin(struct intel_encoder *encoder)
{
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
const struct intel_bios_encoder_data *devdata = i915->vbt.ddi_port_info[encoder->port].devdata;
return i915->vbt.ddi_port_info[encoder->port].alternate_ddc_pin;
if (!devdata || !devdata->child.ddc_pin)
return 0;
return map_ddc_pin(i915, devdata->child.ddc_pin);
}
bool intel_bios_encoder_supports_typec_usb(const struct intel_bios_encoder_data *devdata)

2
drivers/gpu/drm/i915/i915_drv.h
View File

@ -638,8 +638,6 @@ i915_fence_timeout(const struct drm_i915_private *i915)
struct ddi_vbt_port_info {
/* Non-NULL if port present. */
struct intel_bios_encoder_data *devdata;
u8 alternate_ddc_pin;
};
enum psr_lines_to_wait {