[Intel-gfx] [v4, 1/2] drm/i915/edid: convert DP, HDMI and LVDS to drm_edid
Lee, Shawn C
shawn.c.lee at intel.com
Wed Jul 20 01:09:12 UTC 2022
On Fri, Jul 01, 2022 at 12:57:38PM +0300, Ville Syrjälä wrote:
>On Fri, Jul 01, 2022 at 11:55:38AM +0300, Jani Nikula wrote:
>> Convert all the connectors that use cached connector edid and
>> detect_edid to drm_edid.
>>
>> Since drm_get_edid() calls drm_connector_update_edid_property() while
>> drm_edid_read*() do not, we need to call drm_edid_connector_update()
>> separately, in part due to the EDID caching behaviour in HDMI and
>> DP. Especially DP depends on the details parsed from EDID. (The big
>> behavioural change conflating EDID reading with parsing and property
>> update was done in commit 5186421cbfe2 ("drm: Introduce epoch counter to
>> drm_connector"))
>>
>> v4: Call drm_edid_connector_update() after reading HDMI/DP EDID
>>
>> v3: Don't leak vga switcheroo EDID in LVDS init (Ville)
>>
>> v2: Don't leak opregion fallback EDID (Ville)
>>
>> Signed-off-by: Jani Nikula <jani.nikula at intel.com>
>> ---
>> .../gpu/drm/i915/display/intel_connector.c | 4 +-
>> .../drm/i915/display/intel_display_types.h | 4 +-
>> drivers/gpu/drm/i915/display/intel_dp.c | 80 +++++++++++--------
>> drivers/gpu/drm/i915/display/intel_hdmi.c | 28 ++++---
>> drivers/gpu/drm/i915/display/intel_lvds.c | 37 +++++----
>> 5 files changed, 87 insertions(+), 66 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/display/intel_connector.c b/drivers/gpu/drm/i915/display/intel_connector.c
>> index 1dcc268927a2..d83b2a64f618 100644
>> --- a/drivers/gpu/drm/i915/display/intel_connector.c
>> +++ b/drivers/gpu/drm/i915/display/intel_connector.c
>> @@ -95,12 +95,12 @@ void intel_connector_destroy(struct drm_connector *connector)
>> {
>> struct intel_connector *intel_connector = to_intel_connector(connector);
>>
>> - kfree(intel_connector->detect_edid);
>> + drm_edid_free(intel_connector->detect_edid);
>>
>> intel_hdcp_cleanup(intel_connector);
>>
>> if (!IS_ERR_OR_NULL(intel_connector->edid))
>> - kfree(intel_connector->edid);
>> + drm_edid_free(intel_connector->edid);
>>
>> intel_panel_fini(intel_connector);
>>
>> diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
>> index 0da9b208d56e..d476df0ac9df 100644
>> --- a/drivers/gpu/drm/i915/display/intel_display_types.h
>> +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
>> @@ -592,8 +592,8 @@ struct intel_connector {
>> struct intel_panel panel;
>>
>> /* Cached EDID for eDP and LVDS. May hold ERR_PTR for invalid EDID. */
>> - struct edid *edid;
>> - struct edid *detect_edid;
>> + const struct drm_edid *edid;
>> + const struct drm_edid *detect_edid;
>>
>> /* Number of times hotplug detection was tried after an HPD interrupt */
>> int hotplug_retries;
>> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
>> index 32292c0be2bd..8a3b2dbebe04 100644
>> --- a/drivers/gpu/drm/i915/display/intel_dp.c
>> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
>> @@ -3577,12 +3577,11 @@ static u8 intel_dp_autotest_edid(struct intel_dp *intel_dp)
>> intel_dp->aux.i2c_defer_count);
>> intel_dp->compliance.test_data.edid = INTEL_DP_RESOLUTION_FAILSAFE;
>> } else {
>> - struct edid *block = intel_connector->detect_edid;
>> + /* FIXME: Get rid of drm_edid_raw() */
>> + const struct edid *block = drm_edid_raw(intel_connector->detect_edid);
>>
>> - /* We have to write the checksum
>> - * of the last block read
>> - */
>> - block += intel_connector->detect_edid->extensions;
>> + /* We have to write the checksum of the last block read */
>> + block += block->extensions;
>>
>> if (drm_dp_dpcd_writeb(&intel_dp->aux, DP_TEST_EDID_CHECKSUM,
>> block->checksum) <= 0)
>> @@ -4461,7 +4460,7 @@ bool intel_digital_port_connected(struct intel_encoder *encoder)
>> return is_connected;
>> }
>>
>> -static struct edid *
>> +static const struct drm_edid *
>> intel_dp_get_edid(struct intel_dp *intel_dp)
>> {
>> struct intel_connector *intel_connector = intel_dp->attached_connector;
>> @@ -4472,18 +4471,22 @@ intel_dp_get_edid(struct intel_dp *intel_dp)
>> if (IS_ERR(intel_connector->edid))
>> return NULL;
>>
>> - return drm_edid_duplicate(intel_connector->edid);
>> + return drm_edid_dup(intel_connector->edid);
>> } else
>> - return drm_get_edid(&intel_connector->base,
>> - &intel_dp->aux.ddc);
>> + return drm_edid_read_ddc(&intel_connector->base,
>> + &intel_dp->aux.ddc);
>> }
>>
>> static void
>> intel_dp_update_dfp(struct intel_dp *intel_dp,
>> - const struct edid *edid)
>> + const struct drm_edid *drm_edid)
>> {
>> struct drm_i915_private *i915 = dp_to_i915(intel_dp);
>> struct intel_connector *connector = intel_dp->attached_connector;
>> + const struct edid *edid;
>> +
>> + /* FIXME: Get rid of drm_edid_raw() */
>> + edid = drm_edid_raw(drm_edid);
>>
>> intel_dp->dfp.max_bpc =
>> drm_dp_downstream_max_bpc(intel_dp->dpcd,
>> @@ -4583,21 +4586,27 @@ intel_dp_set_edid(struct intel_dp *intel_dp)
>> {
>> struct drm_i915_private *i915 = dp_to_i915(intel_dp);
>> struct intel_connector *connector = intel_dp->attached_connector;
>> - struct edid *edid;
>> + const struct drm_edid *drm_edid;
>> + const struct edid *edid;
>> bool vrr_capable;
>>
>> intel_dp_unset_edid(intel_dp);
>> - edid = intel_dp_get_edid(intel_dp);
>> - connector->detect_edid = edid;
>> + drm_edid = intel_dp_get_edid(intel_dp);
>> + connector->detect_edid = drm_edid;
>> +
>> + /* Below we depend on display info having been updated */
>> + drm_edid_connector_update(&connector->base, drm_edid);
>
>Hmm. Just the VRR thing needs it for the moment I guess?
>
>Oh, and IIRC there was also a patch to replace
>drm_detect_hdmi_monitor() with display_info floating around
>somewhere. That one might have fallen through the cracks...
>
>Anyways, I think what's going to happen now is we're going to
>add all the modes to the probed_modes list twice (first from
>.detect()->set_edid() and a second time from .get_modes()).
>I suppose that's not a huge problem as the duplicates should
>just get discarded by drm_connector_list_update(). But it is
>a bit wasteful.
>
>OTOH using display_info without having it fully populated
>(which only gets done if we do the full mode parsing) is super
>sketchy. So I suppose this is better than the alterntive.
>
>Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
>>
>> vrr_capable = intel_vrr_is_capable(connector);
>> drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] VRR capable: %s\n",
>> connector->base.base.id, connector->base.name, str_yes_no(vrr_capable));
>> drm_connector_set_vrr_capable_property(&connector->base, vrr_capable);
>>
>> - intel_dp_update_dfp(intel_dp, edid);
>> + intel_dp_update_dfp(intel_dp, drm_edid);
>> intel_dp_update_420(intel_dp);
>>
>> + /* FIXME: Get rid of drm_edid_raw() */
>> + edid = drm_edid_raw(drm_edid);
>> if (edid && edid->input & DRM_EDID_INPUT_DIGITAL) {
>> intel_dp->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
>> intel_dp->has_audio = drm_detect_monitor_audio(edid);
>> @@ -4612,7 +4621,7 @@ intel_dp_unset_edid(struct intel_dp *intel_dp)
>> struct intel_connector *connector = intel_dp->attached_connector;
>>
>> drm_dp_cec_unset_edid(&intel_dp->aux);
>> - kfree(connector->detect_edid);
>> + drm_edid_free(connector->detect_edid);
>> connector->detect_edid = NULL;
>>
>> intel_dp->has_hdmi_sink = false;
>> @@ -4776,12 +4785,11 @@ intel_dp_force(struct drm_connector *connector)
>> static int intel_dp_get_modes(struct drm_connector *connector)
>> {
>> struct intel_connector *intel_connector = to_intel_connector(connector);
>> - struct edid *edid;
>> + const struct drm_edid *drm_edid;
>> int num_modes = 0;
>>
>> - edid = intel_connector->detect_edid;
>> - if (edid)
>> - num_modes = intel_connector_update_modes(connector, edid);
>> + drm_edid = intel_connector->detect_edid;
>> + num_modes = drm_edid_connector_update(connector, drm_edid);
>>
>> /* Also add fixed mode, which may or may not be present in EDID */
>> if (intel_dp_is_edp(intel_attached_dp(intel_connector)))
>> @@ -4790,7 +4798,7 @@ static int intel_dp_get_modes(struct drm_connector *connector)
>> if (num_modes)
>> return num_modes;
>>
>> - if (!edid) {
>> + if (!drm_edid) {
>> struct intel_dp *intel_dp = intel_attached_dp(intel_connector);
>> struct drm_display_mode *mode;
>>
>> @@ -5198,7 +5206,7 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
>> struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
>> bool has_dpcd;
>> enum pipe pipe = INVALID_PIPE;
>> - struct edid *edid;
>> + const struct drm_edid *drm_edid;
>>
>> if (!intel_dp_is_edp(intel_dp))
>> return true;
>> @@ -5231,29 +5239,33 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
>> }
>>
>> mutex_lock(&dev->mode_config.mutex);
>> - edid = drm_get_edid(connector, &intel_dp->aux.ddc);
>> - if (!edid) {
>> + drm_edid = drm_edid_read_ddc(connector, &intel_dp->aux.ddc);
>> + if (!drm_edid) {
>> + const struct edid *edid;
>> +
>> /* Fallback to EDID from ACPI OpRegion, if any */
>> + /* FIXME: Make intel_opregion_get_edid() return drm_edid */
>> edid = intel_opregion_get_edid(intel_connector);
>> - if (edid)
>> + if (edid) {
>> + drm_edid = drm_edid_alloc(edid, (edid->extensions + 1) * EDID_LENGTH);
>> drm_dbg_kms(&dev_priv->drm,
>> "[CONNECTOR:%d:%s] Using OpRegion EDID\n",
>> connector->base.id, connector->name);
>> - }
>> - if (edid) {
>> - if (drm_add_edid_modes(connector, edid)) {
>> - drm_connector_update_edid_property(connector, edid);
>> - } else {
>> kfree(edid);
>> - edid = ERR_PTR(-EINVAL);
>> + }
>> + }
>> + if (drm_edid) {
>> + if (!drm_edid_connector_update(connector, drm_edid)) {
>> + drm_edid_free(drm_edid);
>> + drm_edid = ERR_PTR(-EINVAL);
>> }
>> } else {
>> - edid = ERR_PTR(-ENOENT);
>> + drm_edid = ERR_PTR(-ENOENT);
>> }
>> - intel_connector->edid = edid;
>> + intel_connector->edid = drm_edid;
>>
>> - intel_bios_init_panel(dev_priv, &intel_connector->panel,
>> - encoder->devdata, IS_ERR(edid) ? NULL : edid);
>> + intel_bios_init_panel(dev_priv, &intel_connector->panel, encoder->devdata,
>> + IS_ERR_OR_NULL(drm_edid) ? NULL : drm_edid_raw(drm_edid));
>>
>> intel_panel_add_edid_fixed_modes(intel_connector,
>> intel_connector->panel.vbt.drrs_type != DRRS_TYPE_NONE,
>> diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
>> index 1ae09431f53a..81f24185e3a0 100644
>> --- a/drivers/gpu/drm/i915/display/intel_hdmi.c
>> +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
>> @@ -2340,7 +2340,7 @@ intel_hdmi_unset_edid(struct drm_connector *connector)
>> intel_hdmi->dp_dual_mode.type = DRM_DP_DUAL_MODE_NONE;
>> intel_hdmi->dp_dual_mode.max_tmds_clock = 0;
>>
>> - kfree(to_intel_connector(connector)->detect_edid);
>> + drm_edid_free(to_intel_connector(connector)->detect_edid);
>> to_intel_connector(connector)->detect_edid = NULL;
>> }
>>
>> @@ -2407,7 +2407,8 @@ intel_hdmi_set_edid(struct drm_connector *connector)
>> struct drm_i915_private *dev_priv = to_i915(connector->dev);
>> struct intel_hdmi *intel_hdmi = intel_attached_hdmi(to_intel_connector(connector));
>> intel_wakeref_t wakeref;
>> - struct edid *edid;
>> + const struct drm_edid *drm_edid;
>> + const struct edid *edid;
>> bool connected = false;
>> struct i2c_adapter *i2c;
>>
>> @@ -2415,21 +2416,26 @@ intel_hdmi_set_edid(struct drm_connector *connector)
>>
>> i2c = intel_gmbus_get_adapter(dev_priv, intel_hdmi->ddc_bus);
>>
>> - edid = drm_get_edid(connector, i2c);
>> + drm_edid = drm_edid_read_ddc(connector, i2c);
>>
>> - if (!edid && !intel_gmbus_is_forced_bit(i2c)) {
>> + if (!drm_edid && !intel_gmbus_is_forced_bit(i2c)) {
>> drm_dbg_kms(&dev_priv->drm,
>> "HDMI GMBUS EDID read failed, retry using GPIO bit-banging\n");
>> intel_gmbus_force_bit(i2c, true);
>> - edid = drm_get_edid(connector, i2c);
>> + drm_edid = drm_edid_read_ddc(connector, i2c);
>> intel_gmbus_force_bit(i2c, false);
>> }
>>
>> - intel_hdmi_dp_dual_mode_detect(connector, edid != NULL);
>> + drm_edid_connector_update(connector, drm_edid);
>> +
>> + intel_hdmi_dp_dual_mode_detect(connector, drm_edid != NULL);
>>
>> intel_display_power_put(dev_priv, POWER_DOMAIN_GMBUS, wakeref);
>>
>> - to_intel_connector(connector)->detect_edid = edid;
>> + to_intel_connector(connector)->detect_edid = drm_edid;
>> +
>> + /* FIXME: Get rid of drm_edid_raw() */
>> + edid = drm_edid_raw(drm_edid);
>> if (edid && edid->input & DRM_EDID_INPUT_DIGITAL) {
>> intel_hdmi->has_audio = drm_detect_monitor_audio(edid);
>> intel_hdmi->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
>> @@ -2501,13 +2507,11 @@ intel_hdmi_force(struct drm_connector *connector)
>>
>> static int intel_hdmi_get_modes(struct drm_connector *connector)
>> {
>> - struct edid *edid;
>> + const struct drm_edid *drm_edid;
>>
>> - edid = to_intel_connector(connector)->detect_edid;
>> - if (edid == NULL)
>> - return 0;
>> + drm_edid = to_intel_connector(connector)->detect_edid;
>>
>> - return intel_connector_update_modes(connector, edid);
>> + return drm_edid_connector_update(connector, drm_edid);
>> }
>>
>> static struct i2c_adapter *
>> diff --git a/drivers/gpu/drm/i915/display/intel_lvds.c b/drivers/gpu/drm/i915/display/intel_lvds.c
>> index 730480ac3300..98c07fd3bd3e 100644
>> --- a/drivers/gpu/drm/i915/display/intel_lvds.c
>> +++ b/drivers/gpu/drm/i915/display/intel_lvds.c
>> @@ -479,7 +479,7 @@ static int intel_lvds_get_modes(struct drm_connector *connector)
>>
>> /* use cached edid if we have one */
>> if (!IS_ERR_OR_NULL(intel_connector->edid))
>> - return drm_add_edid_modes(connector, intel_connector->edid);
>> + return drm_edid_connector_update(connector, intel_connector->edid);
>>
>> return intel_panel_get_modes(intel_connector);
>> }
>> @@ -829,7 +829,7 @@ void intel_lvds_init(struct drm_i915_private *dev_priv)
>> struct intel_connector *intel_connector;
>> struct drm_connector *connector;
>> struct drm_encoder *encoder;
>> - struct edid *edid;
>> + const struct drm_edid *drm_edid;
It will be good to assign NULL pointer to drm_edid.
Best regards,
Shawn
>> i915_reg_t lvds_reg;
>> u32 lvds;
>> u8 pin;
>> @@ -948,27 +948,32 @@ void intel_lvds_init(struct drm_i915_private *dev_priv)
>> * preferred mode is the right one.
>> */
>> mutex_lock(&dev->mode_config.mutex);
>> - if (vga_switcheroo_handler_flags() & VGA_SWITCHEROO_CAN_SWITCH_DDC)
>> + if (vga_switcheroo_handler_flags() & VGA_SWITCHEROO_CAN_SWITCH_DDC) {
>> + const struct edid *edid;
>> +
>> + /* FIXME: Make drm_get_edid_switcheroo() return drm_edid */
>> edid = drm_get_edid_switcheroo(connector,
>> - intel_gmbus_get_adapter(dev_priv, pin));
>> - else
>> - edid = drm_get_edid(connector,
>> - intel_gmbus_get_adapter(dev_priv, pin));
>> - if (edid) {
>> - if (drm_add_edid_modes(connector, edid)) {
>> - drm_connector_update_edid_property(connector,
>> - edid);
>> - } else {
>> + intel_gmbus_get_adapter(dev_priv, pin));
>> + if (edid) {
>> + drm_edid = drm_edid_alloc(edid, (edid->extensions + 1) * EDID_LENGTH);
>> kfree(edid);
>> - edid = ERR_PTR(-EINVAL);
>> }
>> } else {
>> - edid = ERR_PTR(-ENOENT);
>> + drm_edid = drm_edid_read_ddc(connector,
>> + intel_gmbus_get_adapter(dev_priv, pin));
>> + }
>> + if (drm_edid) {
>> + if (!drm_edid_connector_update(connector, drm_edid)) {
>> + drm_edid_free(drm_edid);
>> + drm_edid = ERR_PTR(-EINVAL);
>> + }
>> + } else {
>> + drm_edid = ERR_PTR(-ENOENT);
>> }
>> - intel_connector->edid = edid;
>> + intel_connector->edid = drm_edid;
>>
>> intel_bios_init_panel(dev_priv, &intel_connector->panel, NULL,
>> - IS_ERR(edid) ? NULL : edid);
>> + IS_ERR_OR_NULL(drm_edid) ? NULL : drm_edid_raw(drm_edid));
>>
>> /* Try EDID first */
>> intel_panel_add_edid_fixed_modes(intel_connector,
>> --
>> 2.30.2
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