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This make pre_enable and post_disable (thus pm_runtime_get/put) symmetric. Fixes: 46f206304db0 ("drm/bridge: ps8640: Rework power state handling") Signed-off-by: Pin-yen Lin Reviewed-by: Robert Foss Reviewed-by: Douglas Anderson --- (no changes since v1) drivers/gpu/drm/bridge/parade-ps8640.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c index 4b361d7d5e44..08de501c436e 100644 --- a/drivers/gpu/drm/bridge/parade-ps8640.c +++ b/drivers/gpu/drm/bridge/parade-ps8640.c @@ -557,7 +557,8 @@ static struct edid *ps8640_bridge_get_edid(struct drm_bridge *bridge, * EDID, for this chip, we need to do a full poweron, otherwise it will * fail. */ - drm_atomic_bridge_chain_pre_enable(bridge, connector->state->state); + if (poweroff) + drm_atomic_bridge_chain_pre_enable(bridge, connector->state->state); edid = drm_get_edid(connector, ps_bridge->page[PAGE0_DP_CNTL]->adapter); From patchwork Wed Mar 15 03:55:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pin-yen Lin X-Patchwork-Id: 69940 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:5915:0:0:0:0:0 with SMTP id v21csp2127003wrd; Tue, 14 Mar 2023 21:08:33 -0700 (PDT) X-Google-Smtp-Source: AK7set/OnpMYQek5WncJgFSGhQ2+2+VZFVj9YKszJGtgB3tOaYb1Pjav72DKN6bpPdMOmBguhxlq X-Received: by 2002:a17:902:c40e:b0:1a0:50bd:31aa with SMTP id k14-20020a170902c40e00b001a050bd31aamr1437037plk.66.1678853313376; Tue, 14 Mar 2023 21:08:33 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1678853313; cv=none; d=google.com; s=arc-20160816; b=Ade+Db6UG/PhwmfdDzeMTdR4e7/81hZjO2c5stkS2vYWsm6NeXbKO7xcIgBYCWeJxh lLyPlLHKgH5zVo1mnThFIu5AEiD5zGkggFzaFf7JtLYuBXbtEkr16G7SXn+8KckVf3PX fPJVQ7B0HABQEYcKtLY+YqvzgstdhAOGE6/yVdNESBJaEESyeTCGbki00eKt4qCSm5yF zZdiPcyAEf23huzzpRAYD5Zd61kQJIR92QNjbRHIVrskI36Z2OIAVVcBFX44TZ8nhnNW Bhc0HnWRMPB4gXQiVALKrAWrlufSFc2b6e3/UQfiW9c+yZlK6y2T3M59XoX6fdo+MJ8E /tRA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=UR5Snc3M6kE4bbPG5fLurLAjOBbquSwKDwwKT7rp0HU=; b=v2YAvQtGq0zgbZDe2nc+FM8C2Vj5qY28nZU6YapWg+FF1eSNv5PZgYEbL9xyOmgGX9 CN/jePm+Po3ZosMCNNrwDt/FIJYI8IFnH16/lLBgNRO/n2GIHU3FpS0a4xKwuPN/MfqL bMHpC2NuS5jkTq/eZ4hazaDLLSl/p9F7aATpfVQeVz/R6bNpwsdPtmnQWc4Dbcaq13P9 zhLEBlx2sBCEVGYxEwunDGsb2JDJS0C8KegOU8M6wUUse6UaYr4rBmJi8JXp7/Zlnjqf zqockTgMO0mv79eXOMhmBjtOb69FeRcJZXl23pGKHQXLDYRigyZtlHJaDxKhpxcy2Xjr kMPQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@chromium.org header.s=google header.b=hOFv5Nxg; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=chromium.org Received: from out1.vger.email (out1.vger.email. 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Add a cache for EDID to speed this up. Signed-off-by: Pin-yen Lin Reviewed-by: Robert Foss Reviewed-by: Douglas Anderson --- Changes in v2: - Remove the NULL assignment in ps8640_remove drivers/gpu/drm/bridge/parade-ps8640.c | 60 +++++++++++++++----------- 1 file changed, 36 insertions(+), 24 deletions(-) diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c index 08de501c436e..cddbfe91f75e 100644 --- a/drivers/gpu/drm/bridge/parade-ps8640.c +++ b/drivers/gpu/drm/bridge/parade-ps8640.c @@ -105,6 +105,7 @@ struct ps8640 { struct gpio_desc *gpio_reset; struct gpio_desc *gpio_powerdown; struct device_link *link; + struct edid *edid; bool pre_enabled; bool need_post_hpd_delay; }; @@ -543,34 +544,37 @@ static struct edid *ps8640_bridge_get_edid(struct drm_bridge *bridge, { struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); bool poweroff = !ps_bridge->pre_enabled; - struct edid *edid; - /* - * When we end calling get_edid() triggered by an ioctl, i.e - * - * drm_mode_getconnector (ioctl) - * -> drm_helper_probe_single_connector_modes - * -> drm_bridge_connector_get_modes - * -> ps8640_bridge_get_edid - * - * We need to make sure that what we need is enabled before reading - * EDID, for this chip, we need to do a full poweron, otherwise it will - * fail. - */ - if (poweroff) - drm_atomic_bridge_chain_pre_enable(bridge, connector->state->state); + if (!ps_bridge->edid) { + /* + * When we end calling get_edid() triggered by an ioctl, i.e + * + * drm_mode_getconnector (ioctl) + * -> drm_helper_probe_single_connector_modes + * -> drm_bridge_connector_get_modes + * -> ps8640_bridge_get_edid + * + * We need to make sure that what we need is enabled before + * reading EDID, for this chip, we need to do a full poweron, + * otherwise it will fail. + */ + if (poweroff) + drm_atomic_bridge_chain_pre_enable(bridge, + connector->state->state); - edid = drm_get_edid(connector, - ps_bridge->page[PAGE0_DP_CNTL]->adapter); + ps_bridge->edid = drm_get_edid(connector, + ps_bridge->page[PAGE0_DP_CNTL]->adapter); - /* - * If we call the get_edid() function without having enabled the chip - * before, return the chip to its original power state. - */ - if (poweroff) - drm_atomic_bridge_chain_post_disable(bridge, connector->state->state); + /* + * If we call the get_edid() function without having enabled the + * chip before, return the chip to its original power state. + */ + if (poweroff) + drm_atomic_bridge_chain_post_disable(bridge, + connector->state->state); + } - return edid; + return drm_edid_duplicate(ps_bridge->edid); } static void ps8640_runtime_disable(void *data) @@ -767,6 +771,13 @@ static int ps8640_probe(struct i2c_client *client) return ret; } +static void ps8640_remove(struct i2c_client *client) +{ + struct ps8640 *ps_bridge = i2c_get_clientdata(client); + + kfree(ps_bridge->edid); +} + static const struct of_device_id ps8640_match[] = { { .compatible = "parade,ps8640" }, { } @@ -775,6 +786,7 @@ MODULE_DEVICE_TABLE(of, ps8640_match); static struct i2c_driver ps8640_driver = { .probe_new = ps8640_probe, + .remove = ps8640_remove, .driver = { .name = "ps8640", .of_match_table = ps8640_match,