[Intel-gfx] [PATCH v4 1/2] drm/i915/edid: convert DP, HDMI and LVDS to drm_edid
Ville Syrjälä
ville.syrjala at linux.intel.com
Fri Jul 1 12:57:34 UTC 2022
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;
> 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
--
Ville Syrjälä
Intel
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