On Thu, Jan 19, 2023 at 06:18:58PM +0200, 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"))
>
> v6: Rebase on drm_edid_connector_add_modes()
>
> v5: Fix potential uninitialized var use (kernel test robot <lkp@xxxxxxxxx>)
>
> 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)
>
> Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
> ---
> .../gpu/drm/i915/display/intel_connector.c | 4 +-
> .../drm/i915/display/intel_display_types.h | 4 +-
> drivers/gpu/drm/i915/display/intel_dp.c | 83 +++++++++++--------
> drivers/gpu/drm/i915/display/intel_hdmi.c | 28 ++++---
> drivers/gpu/drm/i915/display/intel_lvds.c | 46 ++++++----
> 5 files changed, 96 insertions(+), 69 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_connector.c b/drivers/gpu/drm/i915/display/intel_connector.c
> index 562da3b741e2..4814d4e2f7f9 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 32e8b2fc3cc6..34dc850340b8 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 80d95cec8f9d..cd7fae1b7543 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -3648,12 +3648,11 @@ 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)
> @@ -4475,7 +4474,7 @@ 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;
> @@ -4486,18 +4485,22 @@ 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,
> @@ -4597,21 +4600,27 @@ 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);
>
> 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);
> @@ -4626,7 +4635,7 @@ 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;
> @@ -4790,12 +4799,10 @@ 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;
> - int num_modes = 0;
> + int num_modes;
>
> - edid = intel_connector->detect_edid;
> - if (edid)
> - num_modes = intel_connector_update_modes(connector, edid);
> + /* drm_edid_connector_update() done in ->detect() or ->force() */
> + num_modes = drm_edid_connector_add_modes(connector);
>
> /* Also add fixed mode, which may or may not be present in EDID */
> if (intel_dp_is_edp(intel_attached_dp(intel_connector)))
> @@ -4804,7 +4811,7 @@ static int intel_dp_get_modes(struct drm_connector *connector)
> if (num_modes)
> return num_modes;
>
> - if (!edid) {
> + if (!intel_connector->detect_edid) {
> struct intel_dp *intel_dp = intel_attached_dp(intel_connector);
> struct drm_display_mode *mode;
>
> @@ -5240,7 +5247,7 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
> struct drm_display_mode *fixed_mode;
> struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
> bool has_dpcd;
> - struct edid *edid;
> + const struct drm_edid *drm_edid;
>
> if (!intel_dp_is_edp(intel_dp))
> return true;
> @@ -5287,29 +5294,35 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
> }
>
> mutex_lock(&dev_priv->drm.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_connector_add_modes(connector)) {
> + drm_edid_connector_update(connector, NULL);
> + 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_late(dev_priv, &intel_connector->panel,
> - encoder->devdata, IS_ERR(edid) ? NULL : edid);
> + intel_bios_init_panel_late(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, true);
>
> diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
> index 6a2ee342eab5..3431193f0b47 100644
> --- a/drivers/gpu/drm/i915/display/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
> @@ -2360,7 +2360,7 @@ 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;
> }
>
> @@ -2421,7 +2421,8 @@ 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;
>
> @@ -2429,17 +2430,23 @@ 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);
> }
>
> - to_intel_connector(connector)->detect_edid = edid;
> + /* Below we depend on display info having been updated */
> + drm_edid_connector_update(connector, drm_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);
> @@ -2515,13 +2522,8 @@ intel_hdmi_force(struct drm_connector *connector)
>
> static int intel_hdmi_get_modes(struct drm_connector *connector)
> {
> - struct edid *edid;
> -
> - edid = to_intel_connector(connector)->detect_edid;
> - if (edid == NULL)
> - return 0;
> -
> - return intel_connector_update_modes(connector, edid);
> + /* drm_edid_connector_update() done in ->detect() or ->force() */
> + return drm_edid_connector_add_modes(connector);
> }
>
> 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 aecec992cd0d..6a98787edf48 100644
> --- a/drivers/gpu/drm/i915/display/intel_lvds.c
> +++ b/drivers/gpu/drm/i915/display/intel_lvds.c
> @@ -479,8 +479,11 @@ static int intel_lvds_get_modes(struct drm_connector *connector)
> struct intel_connector *intel_connector = to_intel_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);
> + if (!IS_ERR_OR_NULL(intel_connector->edid)) {
> + drm_edid_connector_update(connector, intel_connector->edid);
Isn't this update redundant?
> +
> + return drm_edid_connector_add_modes(connector);
> + }
>
> return intel_panel_get_modes(intel_connector);
> }
> @@ -834,7 +837,7 @@ 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;
> @@ -945,27 +948,36 @@ void intel_lvds_init(struct drm_i915_private *dev_priv)
> * preferred mode is the right one.
> */
> mutex_lock(&dev_priv->drm.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 {
> + drm_edid = NULL;
> + }
> + } else {
> + 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_connector_add_modes(connector)) {
> + drm_edid_connector_update(connector, NULL);
> + 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_late(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, true);
> --
> 2.34.1
--
Ville Syrjälä
Intel
