From patchwork Thu Jan 14 22:17:05 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lyude Paul X-Patchwork-Id: 12021013 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4C8C3C433E0 for ; Thu, 14 Jan 2021 22:17:49 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id F3BD523A24 for ; Thu, 14 Jan 2021 22:17:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org F3BD523A24 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9806189DE3; Thu, 14 Jan 2021 22:17:48 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [63.128.21.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4D41289E63 for ; Thu, 14 Jan 2021 22:17:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1610662666; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=//HMcDHOzYQI1D7GAqPgrJm4kBxJcvIRr1Wcq1EcYHU=; b=d9mKJAB2H9LwrGNnawPqfgm64yJIp8tKiXjNSLx9komGnLBLWzJ66lOl1PCzccIlaY9IUH wGP1am4Iy0vz+NcpBZeJAZCqLQr44r8mnGzDsayV0NYGMwytaSAe7ulE4YdpNKDg0/azFa zoEOwtUoTXor8EJp/5lvTGxgmFpujVI= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-378-XRHoEHhHNYqfh53k1UYOjg-1; Thu, 14 Jan 2021 17:17:41 -0500 X-MC-Unique: XRHoEHhHNYqfh53k1UYOjg-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C13B9B8101; Thu, 14 Jan 2021 22:17:38 +0000 (UTC) Received: from Whitewolf.redhat.com (ovpn-115-182.rdu2.redhat.com [10.10.115.182]) by smtp.corp.redhat.com (Postfix) with ESMTP id 674CE10016FA; Thu, 14 Jan 2021 22:17:33 +0000 (UTC) From: Lyude Paul To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Date: Thu, 14 Jan 2021 17:17:05 -0500 Message-Id: <20210114221709.2261452-2-lyude@redhat.com> In-Reply-To: <20210114221709.2261452-1-lyude@redhat.com> References: <20210114221709.2261452-1-lyude@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Subject: [Intel-gfx] [PATCH v7 1/5] drm/i915: Pass port to intel_panel_bl_funcs.get() X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Arnd Bergmann , David Airlie , Lucas De Marchi , open list , Chris Wilson , Sean Paul , Dave Airlie Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" In the next commit where we split PWM related backlight functions from higher-level backlight functions, we'll want to be able to retrieve the backlight level for the current display panel from the intel_panel_bl_funcs->setup() function using pwm_funcs->get(). Since intel_panel_bl_funcs->setup() is called before we've fully read in the current hardware state into our atomic state, we can't grab atomic modesetting locks safely anyway in intel_panel_bl_funcs->setup(), and some PWM backlight functions (vlv_get_backlight() in particular) require knowing the currently used pipe we need to be able to discern the current display pipe through other means. Luckily, we're already passing the current display pipe to intel_panel_bl_funcs->setup() so all we have to do in order to achieve this is pass down that parameter to intel_panel_bl_funcs->get(). So, fix this by accepting an additional pipe parameter in intel_panel_bl_funcs->get(), and leave figuring out the current display pipe up to the caller. Signed-off-by: Lyude Paul Reviewed-by: Jani Nikula --- .../drm/i915/display/intel_display_types.h | 2 +- .../drm/i915/display/intel_dp_aux_backlight.c | 4 +- .../i915/display/intel_dsi_dcs_backlight.c | 2 +- drivers/gpu/drm/i915/display/intel_panel.c | 40 ++++++++----------- 4 files changed, 21 insertions(+), 27 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index 585bb1edea04..b1f4ec144207 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -228,7 +228,7 @@ struct intel_encoder { struct intel_panel_bl_funcs { /* Connector and platform specific backlight functions */ int (*setup)(struct intel_connector *connector, enum pipe pipe); - u32 (*get)(struct intel_connector *connector); + u32 (*get)(struct intel_connector *connector, enum pipe pipe); void (*set)(const struct drm_connector_state *conn_state, u32 level); void (*disable)(const struct drm_connector_state *conn_state, u32 level); void (*enable)(const struct intel_crtc_state *crtc_state, diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c index 9775f33d1aac..de764dae1e66 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c +++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c @@ -128,7 +128,7 @@ static bool intel_dp_aux_vesa_backlight_dpcd_mode(struct intel_connector *connec * Read the current backlight value from DPCD register(s) based * on if 8-bit(MSB) or 16-bit(MSB and LSB) values are supported */ -static u32 intel_dp_aux_vesa_get_backlight(struct intel_connector *connector) +static u32 intel_dp_aux_vesa_get_backlight(struct intel_connector *connector, enum pipe unused) { struct intel_dp *intel_dp = intel_attached_dp(connector); struct drm_i915_private *i915 = dp_to_i915(intel_dp); @@ -381,7 +381,7 @@ static int intel_dp_aux_vesa_setup_backlight(struct intel_connector *connector, return -ENODEV; panel->backlight.min = 0; - panel->backlight.level = intel_dp_aux_vesa_get_backlight(connector); + panel->backlight.level = intel_dp_aux_vesa_get_backlight(connector, pipe); panel->backlight.enabled = intel_dp_aux_vesa_backlight_dpcd_mode(connector) && panel->backlight.level != 0; diff --git a/drivers/gpu/drm/i915/display/intel_dsi_dcs_backlight.c b/drivers/gpu/drm/i915/display/intel_dsi_dcs_backlight.c index 88628764956d..584c14c4cbd0 100644 --- a/drivers/gpu/drm/i915/display/intel_dsi_dcs_backlight.c +++ b/drivers/gpu/drm/i915/display/intel_dsi_dcs_backlight.c @@ -43,7 +43,7 @@ #define PANEL_PWM_MAX_VALUE 0xFF -static u32 dcs_get_backlight(struct intel_connector *connector) +static u32 dcs_get_backlight(struct intel_connector *connector, enum pipe unused) { struct intel_encoder *encoder = intel_attached_encoder(connector); struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder); diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c index 7a4239d1c241..7587aaefc7a0 100644 --- a/drivers/gpu/drm/i915/display/intel_panel.c +++ b/drivers/gpu/drm/i915/display/intel_panel.c @@ -530,21 +530,21 @@ static u32 intel_panel_compute_brightness(struct intel_connector *connector, return val; } -static u32 lpt_get_backlight(struct intel_connector *connector) +static u32 lpt_get_backlight(struct intel_connector *connector, enum pipe unused) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); return intel_de_read(dev_priv, BLC_PWM_PCH_CTL2) & BACKLIGHT_DUTY_CYCLE_MASK; } -static u32 pch_get_backlight(struct intel_connector *connector) +static u32 pch_get_backlight(struct intel_connector *connector, enum pipe unused) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); return intel_de_read(dev_priv, BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; } -static u32 i9xx_get_backlight(struct intel_connector *connector) +static u32 i9xx_get_backlight(struct intel_connector *connector, enum pipe unused) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; @@ -564,23 +564,17 @@ static u32 i9xx_get_backlight(struct intel_connector *connector) return val; } -static u32 _vlv_get_backlight(struct drm_i915_private *dev_priv, enum pipe pipe) +static u32 vlv_get_backlight(struct intel_connector *connector, enum pipe pipe) { + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + if (drm_WARN_ON(&dev_priv->drm, pipe != PIPE_A && pipe != PIPE_B)) return 0; return intel_de_read(dev_priv, VLV_BLC_PWM_CTL(pipe)) & BACKLIGHT_DUTY_CYCLE_MASK; } -static u32 vlv_get_backlight(struct intel_connector *connector) -{ - struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - enum pipe pipe = intel_connector_get_pipe(connector); - - return _vlv_get_backlight(dev_priv, pipe); -} - -static u32 bxt_get_backlight(struct intel_connector *connector) +static u32 bxt_get_backlight(struct intel_connector *connector, enum pipe unused) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; @@ -589,7 +583,7 @@ static u32 bxt_get_backlight(struct intel_connector *connector) BXT_BLC_PWM_DUTY(panel->backlight.controller)); } -static u32 ext_pwm_get_backlight(struct intel_connector *connector) +static u32 ext_pwm_get_backlight(struct intel_connector *connector, enum pipe unused) { struct intel_panel *panel = &connector->panel; struct pwm_state state; @@ -1233,7 +1227,7 @@ static u32 intel_panel_get_backlight(struct intel_connector *connector) mutex_lock(&dev_priv->backlight_lock); if (panel->backlight.enabled) { - val = panel->backlight.funcs->get(connector); + val = panel->backlight.funcs->get(connector, intel_connector_get_pipe(connector)); val = intel_panel_compute_brightness(connector, val); } @@ -1646,9 +1640,9 @@ static int lpt_setup_backlight(struct intel_connector *connector, enum pipe unus !(pch_ctl1 & BLM_PCH_OVERRIDE_ENABLE) && (cpu_ctl2 & BLM_PWM_ENABLE); if (cpu_mode) - val = pch_get_backlight(connector); + val = pch_get_backlight(connector, unused); else - val = lpt_get_backlight(connector); + val = lpt_get_backlight(connector, unused); if (cpu_mode) { drm_dbg_kms(&dev_priv->drm, @@ -1690,7 +1684,7 @@ static int pch_setup_backlight(struct intel_connector *connector, enum pipe unus panel->backlight.min = get_backlight_min_vbt(connector); - val = pch_get_backlight(connector); + val = pch_get_backlight(connector, unused); val = intel_panel_compute_brightness(connector, val); panel->backlight.level = clamp(val, panel->backlight.min, panel->backlight.max); @@ -1731,7 +1725,7 @@ static int i9xx_setup_backlight(struct intel_connector *connector, enum pipe unu panel->backlight.min = get_backlight_min_vbt(connector); - val = i9xx_get_backlight(connector); + val = i9xx_get_backlight(connector, unused); val = intel_panel_compute_brightness(connector, val); panel->backlight.level = clamp(val, panel->backlight.min, panel->backlight.max); @@ -1765,7 +1759,7 @@ static int i965_setup_backlight(struct intel_connector *connector, enum pipe unu panel->backlight.min = get_backlight_min_vbt(connector); - val = i9xx_get_backlight(connector); + val = i9xx_get_backlight(connector, unused); val = intel_panel_compute_brightness(connector, val); panel->backlight.level = clamp(val, panel->backlight.min, panel->backlight.max); @@ -1798,7 +1792,7 @@ static int vlv_setup_backlight(struct intel_connector *connector, enum pipe pipe panel->backlight.min = get_backlight_min_vbt(connector); - val = _vlv_get_backlight(dev_priv, pipe); + val = vlv_get_backlight(connector, pipe); val = intel_panel_compute_brightness(connector, val); panel->backlight.level = clamp(val, panel->backlight.min, panel->backlight.max); @@ -1840,7 +1834,7 @@ bxt_setup_backlight(struct intel_connector *connector, enum pipe unused) panel->backlight.min = get_backlight_min_vbt(connector); - val = bxt_get_backlight(connector); + val = bxt_get_backlight(connector, unused); val = intel_panel_compute_brightness(connector, val); panel->backlight.level = clamp(val, panel->backlight.min, panel->backlight.max); @@ -1880,7 +1874,7 @@ cnp_setup_backlight(struct intel_connector *connector, enum pipe unused) panel->backlight.min = get_backlight_min_vbt(connector); - val = bxt_get_backlight(connector); + val = bxt_get_backlight(connector, unused); val = intel_panel_compute_brightness(connector, val); panel->backlight.level = clamp(val, panel->backlight.min, panel->backlight.max); From patchwork Thu Jan 14 22:17:06 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lyude Paul X-Patchwork-Id: 12021015 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A7F21C433E0 for ; Thu, 14 Jan 2021 22:17:57 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6A1AF23A34 for ; Thu, 14 Jan 2021 22:17:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6A1AF23A34 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 04CD26E043; Thu, 14 Jan 2021 22:17:57 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [216.205.24.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id 6D7066E043 for ; Thu, 14 Jan 2021 22:17:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1610662674; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=rOlM2DoJHt+QmfSlQZPQQjANmGY9fNaxSm/x2NOIXng=; b=KmdfL9qWtTu9lDM5eHUr/sUmKuzA2RJtqarthFWZPpdnjawWzhl2bL1x3l1RI0QwWkPwou OX0KaNfZcks/pBNLU5joSkFDh7IDcHYO7F2ifyJgjLau3bqushmGsg5TZPzAi0z2xOj2Vm WaovnYU41BnZaoxJ0jZYAYuK4pnD3vE= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-301-ZDfOjTA_P9a8_v9VGZfxjA-1; Thu, 14 Jan 2021 17:17:50 -0500 X-MC-Unique: ZDfOjTA_P9a8_v9VGZfxjA-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id AB83BB8104; Thu, 14 Jan 2021 22:17:47 +0000 (UTC) Received: from Whitewolf.redhat.com (ovpn-115-182.rdu2.redhat.com [10.10.115.182]) by smtp.corp.redhat.com (Postfix) with ESMTP id 00E0910023AF; Thu, 14 Jan 2021 22:17:41 +0000 (UTC) From: Lyude Paul To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Date: Thu, 14 Jan 2021 17:17:06 -0500 Message-Id: <20210114221709.2261452-3-lyude@redhat.com> In-Reply-To: <20210114221709.2261452-1-lyude@redhat.com> References: <20210114221709.2261452-1-lyude@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Subject: [Intel-gfx] [PATCH v7 2/5] drm/i915: Keep track of pwm-related backlight hooks separately X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Arnd Bergmann , Jani Nikula , Lucas De Marchi , open list , Chris Wilson , Vasily Khoruzhick , David Airlie , Dave Airlie Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Currently, every different type of backlight hook that i915 supports is pretty straight forward - you have a backlight, probably through PWM (but maybe DPCD), with a single set of platform-specific hooks that are used for controlling it. HDR backlights, in particular VESA and Intel's HDR backlight implementations, can end up being more complicated. With Intel's proprietary interface, HDR backlight controls always run through the DPCD. When the backlight is in SDR backlight mode however, the driver may need to bypass the TCON and control the backlight directly through PWM. So, in order to support this we'll need to split our backlight callbacks into two groups: a set of high-level backlight control callbacks in intel_panel, and an additional set of pwm-specific backlight control callbacks. This also implies a functional changes for how these callbacks are used: * We now keep track of two separate backlight level ranges, one for the high-level backlight, and one for the pwm backlight range * We also keep track of backlight enablement and PWM backlight enablement separately * Since the currently set backlight level might not be the same as the currently programmed PWM backlight level, we stop setting panel->backlight.level with the currently programmed PWM backlight level in panel->backlight.pwm_funcs->setup(). Instead, we rely on the higher level backlight control functions to retrieve the current PWM backlight level (in this case, intel_pwm_get_backlight()). Note that there are still a few PWM backlight setup callbacks that do actually need to retrieve the current PWM backlight level, although we no longer save this value in panel->backlight.level like before. Additionally, we drop the call to lpt_get_backlight() in lpt_setup_backlight(), and avoid unconditionally writing the PWM value that we get from it and only write it back if we're in CPU mode, and switching to PCH mode. The reason for this is because in the original codepath for this, it was expected that the intel_panel_bl_funcs->setup() hook would be responsible for fetching the initial backlight level. On lpt systems, the only time we could ever be in PCH backlight mode is during the initial driver load - meaning that outside of the setup() hook, lpt_get_backlight() will always be the callback used for retrieving the current backlight level. After this patch we still need to fetch and write-back the PCH backlight value if we're switching from CPU mode to PCH, but because intel_pwm_setup_backlight() will retrieve the backlight level after setup() using the get() hook, which always ends up being lpt_get_backlight(). Thus - an additional call to lpt_get_backlight() in lpt_setup_backlight() is made redundant. v8: * Go back to getting initial brightness level with intel_pwm_get_backlight(), the other fix we had was definitely wrong. v7: * Use panel->backlight.pwm_funcs->get() to get the backlight level in intel_pwm_setup_backlight(), lest we upset lockdep * Rebase * Rename intel_panel_sanitize_pwm_level() to intel_panel_invert_pwm_level() v6: * Make sure to grab connection_mutex before calling intel_pwm_get_backlight() in intel_pwm_setup_backlight() v5: * Fix indenting warnings from checkpatch v4: * Fix commit message * Remove outdated comment in intel_panel.c * Rename pwm_(min|max) to pwm_level_(min|max) * Use intel_pwm_get_backlight() in intel_pwm_setup_backlight() instead of indirection * Don't move intel_dp_aux_init_bcklight_funcs() call to bottom of intel_panel_init_backlight_funcs() quite yet v3: * Reuse intel_panel_bl_funcs() for pwm_funcs * Explain why we drop lpt_get_backlight() Signed-off-by: Lyude Paul Reviewed-by: Jani Nikula Cc: thaytan@noraisin.net Cc: Vasily Khoruzhick squash! drm/i915: Keep track of pwm-related backlight hooks separately Signed-off-by: Lyude Paul Reviewed-by: Jani Nikula --- .../drm/i915/display/intel_display_types.h | 4 + drivers/gpu/drm/i915/display/intel_panel.c | 331 ++++++++++-------- 2 files changed, 188 insertions(+), 147 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index b1f4ec144207..ee23cc1518df 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -252,6 +252,9 @@ struct intel_panel { bool alternate_pwm_increment; /* lpt+ */ /* PWM chip */ + u32 pwm_level_min; + u32 pwm_level_max; + bool pwm_enabled; bool util_pin_active_low; /* bxt+ */ u8 controller; /* bxt+ only */ struct pwm_device *pwm; @@ -263,6 +266,7 @@ struct intel_panel { struct backlight_device *device; const struct intel_panel_bl_funcs *funcs; + const struct intel_panel_bl_funcs *pwm_funcs; void (*power)(struct intel_connector *, bool enable); } backlight; }; diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c index 7587aaefc7a0..cc2386ef6219 100644 --- a/drivers/gpu/drm/i915/display/intel_panel.c +++ b/drivers/gpu/drm/i915/display/intel_panel.c @@ -511,25 +511,34 @@ static u32 scale_hw_to_user(struct intel_connector *connector, 0, user_max); } -static u32 intel_panel_compute_brightness(struct intel_connector *connector, - u32 val) +static u32 intel_panel_invert_pwm_level(struct intel_connector *connector, u32 val) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; - drm_WARN_ON(&dev_priv->drm, panel->backlight.max == 0); + drm_WARN_ON(&dev_priv->drm, panel->backlight.pwm_level_max == 0); if (dev_priv->params.invert_brightness < 0) return val; if (dev_priv->params.invert_brightness > 0 || dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) { - return panel->backlight.max - val + panel->backlight.min; + return panel->backlight.pwm_level_max - val + panel->backlight.pwm_level_min; } return val; } +void intel_panel_set_pwm_level(const struct drm_connector_state *conn_state, u32 val) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct drm_i915_private *i915 = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + + drm_dbg_kms(&i915->drm, "set backlight PWM = %d\n", val); + panel->backlight.pwm_funcs->set(conn_state, val); +} + static u32 lpt_get_backlight(struct intel_connector *connector, enum pipe unused) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); @@ -618,12 +627,12 @@ static void i9xx_set_backlight(const struct drm_connector_state *conn_state, u32 struct intel_panel *panel = &connector->panel; u32 tmp, mask; - drm_WARN_ON(&dev_priv->drm, panel->backlight.max == 0); + drm_WARN_ON(&dev_priv->drm, panel->backlight.pwm_level_max == 0); if (panel->backlight.combination_mode) { u8 lbpc; - lbpc = level * 0xfe / panel->backlight.max + 1; + lbpc = level * 0xfe / panel->backlight.pwm_level_max + 1; level /= lbpc; pci_write_config_byte(dev_priv->drm.pdev, LBPC, lbpc); } @@ -675,9 +684,8 @@ intel_panel_actually_set_backlight(const struct drm_connector_state *conn_state, struct drm_i915_private *i915 = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; - drm_dbg_kms(&i915->drm, "set backlight PWM = %d\n", level); + drm_dbg_kms(&i915->drm, "set backlight level = %d\n", level); - level = intel_panel_compute_brightness(connector, level); panel->backlight.funcs->set(conn_state, level); } @@ -726,7 +734,7 @@ static void lpt_disable_backlight(const struct drm_connector_state *old_conn_sta struct drm_i915_private *dev_priv = to_i915(connector->base.dev); u32 tmp; - intel_panel_actually_set_backlight(old_conn_state, level); + intel_panel_set_pwm_level(old_conn_state, level); /* * Although we don't support or enable CPU PWM with LPT/SPT based @@ -754,7 +762,7 @@ static void pch_disable_backlight(const struct drm_connector_state *old_conn_sta struct drm_i915_private *dev_priv = to_i915(connector->base.dev); u32 tmp; - intel_panel_actually_set_backlight(old_conn_state, val); + intel_panel_set_pwm_level(old_conn_state, val); tmp = intel_de_read(dev_priv, BLC_PWM_CPU_CTL2); intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, tmp & ~BLM_PWM_ENABLE); @@ -765,7 +773,7 @@ static void pch_disable_backlight(const struct drm_connector_state *old_conn_sta static void i9xx_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) { - intel_panel_actually_set_backlight(old_conn_state, val); + intel_panel_set_pwm_level(old_conn_state, val); } static void i965_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) @@ -773,7 +781,7 @@ static void i965_disable_backlight(const struct drm_connector_state *old_conn_st struct drm_i915_private *dev_priv = to_i915(old_conn_state->connector->dev); u32 tmp; - intel_panel_actually_set_backlight(old_conn_state, val); + intel_panel_set_pwm_level(old_conn_state, val); tmp = intel_de_read(dev_priv, BLC_PWM_CTL2); intel_de_write(dev_priv, BLC_PWM_CTL2, tmp & ~BLM_PWM_ENABLE); @@ -786,7 +794,7 @@ static void vlv_disable_backlight(const struct drm_connector_state *old_conn_sta enum pipe pipe = to_intel_crtc(old_conn_state->crtc)->pipe; u32 tmp; - intel_panel_actually_set_backlight(old_conn_state, val); + intel_panel_set_pwm_level(old_conn_state, val); tmp = intel_de_read(dev_priv, VLV_BLC_PWM_CTL2(pipe)); intel_de_write(dev_priv, VLV_BLC_PWM_CTL2(pipe), @@ -800,7 +808,7 @@ static void bxt_disable_backlight(const struct drm_connector_state *old_conn_sta struct intel_panel *panel = &connector->panel; u32 tmp; - intel_panel_actually_set_backlight(old_conn_state, val); + intel_panel_set_pwm_level(old_conn_state, val); tmp = intel_de_read(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller)); @@ -821,7 +829,7 @@ static void cnp_disable_backlight(const struct drm_connector_state *old_conn_sta struct intel_panel *panel = &connector->panel; u32 tmp; - intel_panel_actually_set_backlight(old_conn_state, val); + intel_panel_set_pwm_level(old_conn_state, val); tmp = intel_de_read(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller)); @@ -900,7 +908,7 @@ static void lpt_enable_backlight(const struct intel_crtc_state *crtc_state, intel_de_write(dev_priv, SOUTH_CHICKEN1, schicken); } - pch_ctl2 = panel->backlight.max << 16; + pch_ctl2 = panel->backlight.pwm_level_max << 16; intel_de_write(dev_priv, BLC_PWM_PCH_CTL2, pch_ctl2); pch_ctl1 = 0; @@ -917,7 +925,7 @@ static void lpt_enable_backlight(const struct intel_crtc_state *crtc_state, pch_ctl1 | BLM_PCH_PWM_ENABLE); /* This won't stick until the above enable. */ - intel_panel_actually_set_backlight(conn_state, level); + intel_panel_set_pwm_level(conn_state, level); } static void pch_enable_backlight(const struct intel_crtc_state *crtc_state, @@ -952,9 +960,9 @@ static void pch_enable_backlight(const struct intel_crtc_state *crtc_state, intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, cpu_ctl2 | BLM_PWM_ENABLE); /* This won't stick until the above enable. */ - intel_panel_actually_set_backlight(conn_state, level); + intel_panel_set_pwm_level(conn_state, level); - pch_ctl2 = panel->backlight.max << 16; + pch_ctl2 = panel->backlight.pwm_level_max << 16; intel_de_write(dev_priv, BLC_PWM_PCH_CTL2, pch_ctl2); pch_ctl1 = 0; @@ -981,7 +989,7 @@ static void i9xx_enable_backlight(const struct intel_crtc_state *crtc_state, intel_de_write(dev_priv, BLC_PWM_CTL, 0); } - freq = panel->backlight.max; + freq = panel->backlight.pwm_level_max; if (panel->backlight.combination_mode) freq /= 0xff; @@ -995,7 +1003,7 @@ static void i9xx_enable_backlight(const struct intel_crtc_state *crtc_state, intel_de_posting_read(dev_priv, BLC_PWM_CTL); /* XXX: combine this into above write? */ - intel_panel_actually_set_backlight(conn_state, level); + intel_panel_set_pwm_level(conn_state, level); /* * Needed to enable backlight on some 855gm models. BLC_HIST_CTL is @@ -1022,7 +1030,7 @@ static void i965_enable_backlight(const struct intel_crtc_state *crtc_state, intel_de_write(dev_priv, BLC_PWM_CTL2, ctl2); } - freq = panel->backlight.max; + freq = panel->backlight.pwm_level_max; if (panel->backlight.combination_mode) freq /= 0xff; @@ -1038,7 +1046,7 @@ static void i965_enable_backlight(const struct intel_crtc_state *crtc_state, intel_de_posting_read(dev_priv, BLC_PWM_CTL2); intel_de_write(dev_priv, BLC_PWM_CTL2, ctl2 | BLM_PWM_ENABLE); - intel_panel_actually_set_backlight(conn_state, level); + intel_panel_set_pwm_level(conn_state, level); } static void vlv_enable_backlight(const struct intel_crtc_state *crtc_state, @@ -1057,11 +1065,11 @@ static void vlv_enable_backlight(const struct intel_crtc_state *crtc_state, intel_de_write(dev_priv, VLV_BLC_PWM_CTL2(pipe), ctl2); } - ctl = panel->backlight.max << 16; + ctl = panel->backlight.pwm_level_max << 16; intel_de_write(dev_priv, VLV_BLC_PWM_CTL(pipe), ctl); /* XXX: combine this into above write? */ - intel_panel_actually_set_backlight(conn_state, level); + intel_panel_set_pwm_level(conn_state, level); ctl2 = 0; if (panel->backlight.active_low_pwm) @@ -1110,9 +1118,9 @@ static void bxt_enable_backlight(const struct intel_crtc_state *crtc_state, intel_de_write(dev_priv, BXT_BLC_PWM_FREQ(panel->backlight.controller), - panel->backlight.max); + panel->backlight.pwm_level_max); - intel_panel_actually_set_backlight(conn_state, level); + intel_panel_set_pwm_level(conn_state, level); pwm_ctl = 0; if (panel->backlight.active_low_pwm) @@ -1146,9 +1154,9 @@ static void cnp_enable_backlight(const struct intel_crtc_state *crtc_state, intel_de_write(dev_priv, BXT_BLC_PWM_FREQ(panel->backlight.controller), - panel->backlight.max); + panel->backlight.pwm_level_max); - intel_panel_actually_set_backlight(conn_state, level); + intel_panel_set_pwm_level(conn_state, level); pwm_ctl = 0; if (panel->backlight.active_low_pwm) @@ -1168,7 +1176,6 @@ static void ext_pwm_enable_backlight(const struct intel_crtc_state *crtc_state, struct intel_connector *connector = to_intel_connector(conn_state->connector); struct intel_panel *panel = &connector->panel; - level = intel_panel_compute_brightness(connector, level); pwm_set_relative_duty_cycle(&panel->backlight.pwm_state, level, 100); panel->backlight.pwm_state.enabled = true; pwm_apply_state(panel->backlight.pwm, &panel->backlight.pwm_state); @@ -1226,10 +1233,8 @@ static u32 intel_panel_get_backlight(struct intel_connector *connector) mutex_lock(&dev_priv->backlight_lock); - if (panel->backlight.enabled) { + if (panel->backlight.enabled) val = panel->backlight.funcs->get(connector, intel_connector_get_pipe(connector)); - val = intel_panel_compute_brightness(connector, val); - } mutex_unlock(&dev_priv->backlight_lock); @@ -1560,13 +1565,13 @@ static u32 get_backlight_max_vbt(struct intel_connector *connector) u16 pwm_freq_hz = get_vbt_pwm_freq(dev_priv); u32 pwm; - if (!panel->backlight.funcs->hz_to_pwm) { + if (!panel->backlight.pwm_funcs->hz_to_pwm) { drm_dbg_kms(&dev_priv->drm, "backlight frequency conversion not supported\n"); return 0; } - pwm = panel->backlight.funcs->hz_to_pwm(connector, pwm_freq_hz); + pwm = panel->backlight.pwm_funcs->hz_to_pwm(connector, pwm_freq_hz); if (!pwm) { drm_dbg_kms(&dev_priv->drm, "backlight frequency conversion failed\n"); @@ -1585,7 +1590,7 @@ static u32 get_backlight_min_vbt(struct intel_connector *connector) struct intel_panel *panel = &connector->panel; int min; - drm_WARN_ON(&dev_priv->drm, panel->backlight.max == 0); + drm_WARN_ON(&dev_priv->drm, panel->backlight.pwm_level_max == 0); /* * XXX: If the vbt value is 255, it makes min equal to max, which leads @@ -1602,7 +1607,7 @@ static u32 get_backlight_min_vbt(struct intel_connector *connector) } /* vbt value is a coefficient in range [0..255] */ - return scale(min, 0, 255, 0, panel->backlight.max); + return scale(min, 0, 255, 0, panel->backlight.pwm_level_max); } static int lpt_setup_backlight(struct intel_connector *connector, enum pipe unused) @@ -1622,29 +1627,28 @@ static int lpt_setup_backlight(struct intel_connector *connector, enum pipe unus panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY; pch_ctl2 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL2); - panel->backlight.max = pch_ctl2 >> 16; + panel->backlight.pwm_level_max = pch_ctl2 >> 16; cpu_ctl2 = intel_de_read(dev_priv, BLC_PWM_CPU_CTL2); - if (!panel->backlight.max) - panel->backlight.max = get_backlight_max_vbt(connector); + if (!panel->backlight.pwm_level_max) + panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); - if (!panel->backlight.max) + if (!panel->backlight.pwm_level_max) return -ENODEV; - panel->backlight.min = get_backlight_min_vbt(connector); + panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); - panel->backlight.enabled = pch_ctl1 & BLM_PCH_PWM_ENABLE; + panel->backlight.pwm_enabled = pch_ctl1 & BLM_PCH_PWM_ENABLE; - cpu_mode = panel->backlight.enabled && HAS_PCH_LPT(dev_priv) && + cpu_mode = panel->backlight.pwm_enabled && HAS_PCH_LPT(dev_priv) && !(pch_ctl1 & BLM_PCH_OVERRIDE_ENABLE) && (cpu_ctl2 & BLM_PWM_ENABLE); - if (cpu_mode) - val = pch_get_backlight(connector, unused); - else - val = lpt_get_backlight(connector, unused); if (cpu_mode) { + val = intel_panel_invert_pwm_level(connector, + pch_get_backlight(connector, unused)); + drm_dbg_kms(&dev_priv->drm, "CPU backlight register was enabled, switching to PCH override\n"); @@ -1657,7 +1661,7 @@ static int lpt_setup_backlight(struct intel_connector *connector, enum pipe unus cpu_ctl2 & ~BLM_PWM_ENABLE); } - val = intel_panel_compute_brightness(connector, val); + val = intel_panel_invert_pwm_level(connector, val); panel->backlight.level = clamp(val, panel->backlight.min, panel->backlight.max); @@ -1668,29 +1672,24 @@ static int pch_setup_backlight(struct intel_connector *connector, enum pipe unus { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; - u32 cpu_ctl2, pch_ctl1, pch_ctl2, val; + u32 cpu_ctl2, pch_ctl1, pch_ctl2; pch_ctl1 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY; pch_ctl2 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL2); - panel->backlight.max = pch_ctl2 >> 16; + panel->backlight.pwm_level_max = pch_ctl2 >> 16; - if (!panel->backlight.max) - panel->backlight.max = get_backlight_max_vbt(connector); + if (!panel->backlight.pwm_level_max) + panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); - if (!panel->backlight.max) + if (!panel->backlight.pwm_level_max) return -ENODEV; - panel->backlight.min = get_backlight_min_vbt(connector); - - val = pch_get_backlight(connector, unused); - val = intel_panel_compute_brightness(connector, val); - panel->backlight.level = clamp(val, panel->backlight.min, - panel->backlight.max); + panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); cpu_ctl2 = intel_de_read(dev_priv, BLC_PWM_CPU_CTL2); - panel->backlight.enabled = (cpu_ctl2 & BLM_PWM_ENABLE) && + panel->backlight.pwm_enabled = (cpu_ctl2 & BLM_PWM_ENABLE) && (pch_ctl1 & BLM_PCH_PWM_ENABLE); return 0; @@ -1710,27 +1709,26 @@ static int i9xx_setup_backlight(struct intel_connector *connector, enum pipe unu if (IS_PINEVIEW(dev_priv)) panel->backlight.active_low_pwm = ctl & BLM_POLARITY_PNV; - panel->backlight.max = ctl >> 17; + panel->backlight.pwm_level_max = ctl >> 17; - if (!panel->backlight.max) { - panel->backlight.max = get_backlight_max_vbt(connector); - panel->backlight.max >>= 1; + if (!panel->backlight.pwm_level_max) { + panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); + panel->backlight.pwm_level_max >>= 1; } - if (!panel->backlight.max) + if (!panel->backlight.pwm_level_max) return -ENODEV; if (panel->backlight.combination_mode) - panel->backlight.max *= 0xff; + panel->backlight.pwm_level_max *= 0xff; - panel->backlight.min = get_backlight_min_vbt(connector); + panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); val = i9xx_get_backlight(connector, unused); - val = intel_panel_compute_brightness(connector, val); - panel->backlight.level = clamp(val, panel->backlight.min, - panel->backlight.max); + val = intel_panel_invert_pwm_level(connector, val); + val = clamp(val, panel->backlight.pwm_level_min, panel->backlight.pwm_level_max); - panel->backlight.enabled = val != 0; + panel->backlight.pwm_enabled = val != 0; return 0; } @@ -1739,32 +1737,27 @@ static int i965_setup_backlight(struct intel_connector *connector, enum pipe unu { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; - u32 ctl, ctl2, val; + u32 ctl, ctl2; ctl2 = intel_de_read(dev_priv, BLC_PWM_CTL2); panel->backlight.combination_mode = ctl2 & BLM_COMBINATION_MODE; panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965; ctl = intel_de_read(dev_priv, BLC_PWM_CTL); - panel->backlight.max = ctl >> 16; + panel->backlight.pwm_level_max = ctl >> 16; - if (!panel->backlight.max) - panel->backlight.max = get_backlight_max_vbt(connector); + if (!panel->backlight.pwm_level_max) + panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); - if (!panel->backlight.max) + if (!panel->backlight.pwm_level_max) return -ENODEV; if (panel->backlight.combination_mode) - panel->backlight.max *= 0xff; + panel->backlight.pwm_level_max *= 0xff; - panel->backlight.min = get_backlight_min_vbt(connector); + panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); - val = i9xx_get_backlight(connector, unused); - val = intel_panel_compute_brightness(connector, val); - panel->backlight.level = clamp(val, panel->backlight.min, - panel->backlight.max); - - panel->backlight.enabled = ctl2 & BLM_PWM_ENABLE; + panel->backlight.pwm_enabled = ctl2 & BLM_PWM_ENABLE; return 0; } @@ -1773,7 +1766,7 @@ static int vlv_setup_backlight(struct intel_connector *connector, enum pipe pipe { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; - u32 ctl, ctl2, val; + u32 ctl, ctl2; if (drm_WARN_ON(&dev_priv->drm, pipe != PIPE_A && pipe != PIPE_B)) return -ENODEV; @@ -1782,22 +1775,17 @@ static int vlv_setup_backlight(struct intel_connector *connector, enum pipe pipe panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965; ctl = intel_de_read(dev_priv, VLV_BLC_PWM_CTL(pipe)); - panel->backlight.max = ctl >> 16; + panel->backlight.pwm_level_max = ctl >> 16; - if (!panel->backlight.max) - panel->backlight.max = get_backlight_max_vbt(connector); + if (!panel->backlight.pwm_level_max) + panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); - if (!panel->backlight.max) + if (!panel->backlight.pwm_level_max) return -ENODEV; - panel->backlight.min = get_backlight_min_vbt(connector); + panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); - val = vlv_get_backlight(connector, pipe); - val = intel_panel_compute_brightness(connector, val); - panel->backlight.level = clamp(val, panel->backlight.min, - panel->backlight.max); - - panel->backlight.enabled = ctl2 & BLM_PWM_ENABLE; + panel->backlight.pwm_enabled = ctl2 & BLM_PWM_ENABLE; return 0; } @@ -1822,24 +1810,18 @@ bxt_setup_backlight(struct intel_connector *connector, enum pipe unused) } panel->backlight.active_low_pwm = pwm_ctl & BXT_BLC_PWM_POLARITY; - panel->backlight.max = - intel_de_read(dev_priv, - BXT_BLC_PWM_FREQ(panel->backlight.controller)); + panel->backlight.pwm_level_max = + intel_de_read(dev_priv, BXT_BLC_PWM_FREQ(panel->backlight.controller)); - if (!panel->backlight.max) - panel->backlight.max = get_backlight_max_vbt(connector); + if (!panel->backlight.pwm_level_max) + panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); - if (!panel->backlight.max) + if (!panel->backlight.pwm_level_max) return -ENODEV; - panel->backlight.min = get_backlight_min_vbt(connector); + panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); - val = bxt_get_backlight(connector, unused); - val = intel_panel_compute_brightness(connector, val); - panel->backlight.level = clamp(val, panel->backlight.min, - panel->backlight.max); - - panel->backlight.enabled = pwm_ctl & BXT_BLC_PWM_ENABLE; + panel->backlight.pwm_enabled = pwm_ctl & BXT_BLC_PWM_ENABLE; return 0; } @@ -1849,7 +1831,7 @@ cnp_setup_backlight(struct intel_connector *connector, enum pipe unused) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; - u32 pwm_ctl, val; + u32 pwm_ctl; /* * CNP has the BXT implementation of backlight, but with only one @@ -1862,24 +1844,18 @@ cnp_setup_backlight(struct intel_connector *connector, enum pipe unused) BXT_BLC_PWM_CTL(panel->backlight.controller)); panel->backlight.active_low_pwm = pwm_ctl & BXT_BLC_PWM_POLARITY; - panel->backlight.max = - intel_de_read(dev_priv, - BXT_BLC_PWM_FREQ(panel->backlight.controller)); + panel->backlight.pwm_level_max = + intel_de_read(dev_priv, BXT_BLC_PWM_FREQ(panel->backlight.controller)); - if (!panel->backlight.max) - panel->backlight.max = get_backlight_max_vbt(connector); + if (!panel->backlight.pwm_level_max) + panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); - if (!panel->backlight.max) + if (!panel->backlight.pwm_level_max) return -ENODEV; - panel->backlight.min = get_backlight_min_vbt(connector); - - val = bxt_get_backlight(connector, unused); - val = intel_panel_compute_brightness(connector, val); - panel->backlight.level = clamp(val, panel->backlight.min, - panel->backlight.max); + panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); - panel->backlight.enabled = pwm_ctl & BXT_BLC_PWM_ENABLE; + panel->backlight.pwm_enabled = pwm_ctl & BXT_BLC_PWM_ENABLE; return 0; } @@ -1909,8 +1885,8 @@ static int ext_pwm_setup_backlight(struct intel_connector *connector, return -ENODEV; } - panel->backlight.max = 100; /* 100% */ - panel->backlight.min = get_backlight_min_vbt(connector); + panel->backlight.pwm_level_max = 100; /* 100% */ + panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); if (pwm_is_enabled(panel->backlight.pwm)) { /* PWM is already enabled, use existing settings */ @@ -1918,10 +1894,8 @@ static int ext_pwm_setup_backlight(struct intel_connector *connector, level = pwm_get_relative_duty_cycle(&panel->backlight.pwm_state, 100); - level = intel_panel_compute_brightness(connector, level); - panel->backlight.level = clamp(level, panel->backlight.min, - panel->backlight.max); - panel->backlight.enabled = true; + level = intel_panel_invert_pwm_level(connector, level); + panel->backlight.pwm_enabled = true; drm_dbg_kms(&dev_priv->drm, "PWM already enabled at freq %ld, VBT freq %d, level %d\n", NSEC_PER_SEC / (unsigned long)panel->backlight.pwm_state.period, @@ -1937,6 +1911,58 @@ static int ext_pwm_setup_backlight(struct intel_connector *connector, return 0; } +static void intel_pwm_set_backlight(const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct intel_panel *panel = &connector->panel; + + panel->backlight.pwm_funcs->set(conn_state, + intel_panel_invert_pwm_level(connector, level)); +} + +static u32 intel_pwm_get_backlight(struct intel_connector *connector, enum pipe pipe) +{ + struct intel_panel *panel = &connector->panel; + + return intel_panel_invert_pwm_level(connector, + panel->backlight.pwm_funcs->get(connector, pipe)); +} + +static void intel_pwm_enable_backlight(const struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct intel_panel *panel = &connector->panel; + + panel->backlight.pwm_funcs->enable(crtc_state, conn_state, + intel_panel_invert_pwm_level(connector, level)); +} + +static void intel_pwm_disable_backlight(const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct intel_panel *panel = &connector->panel; + + panel->backlight.pwm_funcs->disable(conn_state, + intel_panel_invert_pwm_level(connector, level)); +} + +static int intel_pwm_setup_backlight(struct intel_connector *connector, enum pipe pipe) +{ + struct intel_panel *panel = &connector->panel; + int ret = panel->backlight.pwm_funcs->setup(connector, pipe); + + if (ret < 0) + return ret; + + panel->backlight.min = panel->backlight.pwm_level_min; + panel->backlight.max = panel->backlight.pwm_level_max; + panel->backlight.level = intel_pwm_get_backlight(connector, pipe); + panel->backlight.enabled = panel->backlight.pwm_enabled; + + return 0; +} + void intel_panel_update_backlight(struct intel_atomic_state *state, struct intel_encoder *encoder, const struct intel_crtc_state *crtc_state, @@ -2010,7 +2036,7 @@ static void intel_panel_destroy_backlight(struct intel_panel *panel) panel->backlight.present = false; } -static const struct intel_panel_bl_funcs bxt_funcs = { +static const struct intel_panel_bl_funcs bxt_pwm_funcs = { .setup = bxt_setup_backlight, .enable = bxt_enable_backlight, .disable = bxt_disable_backlight, @@ -2019,7 +2045,7 @@ static const struct intel_panel_bl_funcs bxt_funcs = { .hz_to_pwm = bxt_hz_to_pwm, }; -static const struct intel_panel_bl_funcs cnp_funcs = { +static const struct intel_panel_bl_funcs cnp_pwm_funcs = { .setup = cnp_setup_backlight, .enable = cnp_enable_backlight, .disable = cnp_disable_backlight, @@ -2028,7 +2054,7 @@ static const struct intel_panel_bl_funcs cnp_funcs = { .hz_to_pwm = cnp_hz_to_pwm, }; -static const struct intel_panel_bl_funcs lpt_funcs = { +static const struct intel_panel_bl_funcs lpt_pwm_funcs = { .setup = lpt_setup_backlight, .enable = lpt_enable_backlight, .disable = lpt_disable_backlight, @@ -2037,7 +2063,7 @@ static const struct intel_panel_bl_funcs lpt_funcs = { .hz_to_pwm = lpt_hz_to_pwm, }; -static const struct intel_panel_bl_funcs spt_funcs = { +static const struct intel_panel_bl_funcs spt_pwm_funcs = { .setup = lpt_setup_backlight, .enable = lpt_enable_backlight, .disable = lpt_disable_backlight, @@ -2046,7 +2072,7 @@ static const struct intel_panel_bl_funcs spt_funcs = { .hz_to_pwm = spt_hz_to_pwm, }; -static const struct intel_panel_bl_funcs pch_funcs = { +static const struct intel_panel_bl_funcs pch_pwm_funcs = { .setup = pch_setup_backlight, .enable = pch_enable_backlight, .disable = pch_disable_backlight, @@ -2063,7 +2089,7 @@ static const struct intel_panel_bl_funcs ext_pwm_funcs = { .get = ext_pwm_get_backlight, }; -static const struct intel_panel_bl_funcs vlv_funcs = { +static const struct intel_panel_bl_funcs vlv_pwm_funcs = { .setup = vlv_setup_backlight, .enable = vlv_enable_backlight, .disable = vlv_disable_backlight, @@ -2072,7 +2098,7 @@ static const struct intel_panel_bl_funcs vlv_funcs = { .hz_to_pwm = vlv_hz_to_pwm, }; -static const struct intel_panel_bl_funcs i965_funcs = { +static const struct intel_panel_bl_funcs i965_pwm_funcs = { .setup = i965_setup_backlight, .enable = i965_enable_backlight, .disable = i965_disable_backlight, @@ -2081,7 +2107,7 @@ static const struct intel_panel_bl_funcs i965_funcs = { .hz_to_pwm = i965_hz_to_pwm, }; -static const struct intel_panel_bl_funcs i9xx_funcs = { +static const struct intel_panel_bl_funcs i9xx_pwm_funcs = { .setup = i9xx_setup_backlight, .enable = i9xx_enable_backlight, .disable = i9xx_disable_backlight, @@ -2090,6 +2116,14 @@ static const struct intel_panel_bl_funcs i9xx_funcs = { .hz_to_pwm = i9xx_hz_to_pwm, }; +static const struct intel_panel_bl_funcs pwm_bl_funcs = { + .setup = intel_pwm_setup_backlight, + .enable = intel_pwm_enable_backlight, + .disable = intel_pwm_disable_backlight, + .set = intel_pwm_set_backlight, + .get = intel_pwm_get_backlight, +}; + /* Set up chip specific backlight functions */ static void intel_panel_init_backlight_funcs(struct intel_panel *panel) @@ -2107,27 +2141,30 @@ intel_panel_init_backlight_funcs(struct intel_panel *panel) return; if (IS_GEN9_LP(dev_priv)) { - panel->backlight.funcs = &bxt_funcs; + panel->backlight.pwm_funcs = &bxt_pwm_funcs; } else if (INTEL_PCH_TYPE(dev_priv) >= PCH_CNP) { - panel->backlight.funcs = &cnp_funcs; + panel->backlight.pwm_funcs = &cnp_pwm_funcs; } else if (INTEL_PCH_TYPE(dev_priv) >= PCH_LPT) { if (HAS_PCH_LPT(dev_priv)) - panel->backlight.funcs = &lpt_funcs; + panel->backlight.pwm_funcs = &lpt_pwm_funcs; else - panel->backlight.funcs = &spt_funcs; + panel->backlight.pwm_funcs = &spt_pwm_funcs; } else if (HAS_PCH_SPLIT(dev_priv)) { - panel->backlight.funcs = &pch_funcs; + panel->backlight.pwm_funcs = &pch_pwm_funcs; } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI) { - panel->backlight.funcs = &ext_pwm_funcs; + panel->backlight.pwm_funcs = &ext_pwm_funcs; } else { - panel->backlight.funcs = &vlv_funcs; + panel->backlight.pwm_funcs = &vlv_pwm_funcs; } } else if (IS_GEN(dev_priv, 4)) { - panel->backlight.funcs = &i965_funcs; + panel->backlight.pwm_funcs = &i965_pwm_funcs; } else { - panel->backlight.funcs = &i9xx_funcs; + panel->backlight.pwm_funcs = &i9xx_pwm_funcs; } + + /* We're using a standard PWM backlight interface */ + panel->backlight.funcs = &pwm_bl_funcs; } enum drm_connector_status From patchwork Thu Jan 14 22:17:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lyude Paul X-Patchwork-Id: 12021017 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 61580C433E0 for ; Thu, 14 Jan 2021 22:18:03 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2959123A24 for ; Thu, 14 Jan 2021 22:18:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2959123A24 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D3C826E044; Thu, 14 Jan 2021 22:18:02 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [63.128.21.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id 690F56E045 for ; Thu, 14 Jan 2021 22:18:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1610662680; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=mLNYfBwqsNRc1p3TeRFr2iKKLH8Q7mt2UZQHY6k15nY=; b=gf1vyMTUid0kkW0GNEjRugb5na1dETowhRI7a2ZixxNWer2dI7ofbyoCpMUZNICG98Vb0Q 6Cy5vyG6BuRaOVIIYVP04pKiRev7LaxSM9Zhtxs6ebMfw1TYJ5JAxgiOdF/bT3sDknaBf6 0uGycyxv8eX6qz1YujY9edqKQ1VnNhg= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-518-CFO3RZM3Ns6e_th-YBKPbA-1; Thu, 14 Jan 2021 17:17:58 -0500 X-MC-Unique: CFO3RZM3Ns6e_th-YBKPbA-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id CE2A8100C660; Thu, 14 Jan 2021 22:17:55 +0000 (UTC) Received: from Whitewolf.redhat.com (ovpn-115-182.rdu2.redhat.com [10.10.115.182]) by smtp.corp.redhat.com (Postfix) with ESMTP id 30A5610016F6; Thu, 14 Jan 2021 22:17:53 +0000 (UTC) From: Lyude Paul To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Date: Thu, 14 Jan 2021 17:17:07 -0500 Message-Id: <20210114221709.2261452-4-lyude@redhat.com> In-Reply-To: <20210114221709.2261452-1-lyude@redhat.com> References: <20210114221709.2261452-1-lyude@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Subject: [Intel-gfx] [PATCH v7 3/5] drm/i915/dp: Enable Intel's HDR backlight interface (only SDR for now) X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: David Airlie , Chris Wilson , Vasily Khoruzhick , Dave Airlie , Arnd Bergmann , Jani Nikula , Lucas De Marchi , Sean Paul , open list Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" So-recently a bunch of laptops on the market have started using DPCD backlight controls instead of the traditional DDI backlight controls. Originally we thought we had this handled by adding VESA backlight control support to i915, but the story ended up being a lot more complicated then that. Simply put-there's two main backlight interfaces Intel can see in the wild. Intel's proprietary HDR backlight interface, and the standard VESA backlight interface. Note that many panels have been observed to report support for both backlight interfaces, but testing has shown far more panels work with the Intel HDR backlight interface at the moment. Additionally, the VBT appears to be capable of reporting support for the VESA backlight interface but not the Intel HDR interface which needs to be probed by setting the right magic OUI. On top of that however, there's also actually two different variants of the Intel HDR backlight interface. The first uses the AUX channel for controlling the brightness of the screen in both SDR and HDR mode, and the second only uses the AUX channel for setting the brightness level in HDR mode - relying on PWM for setting the brightness level in SDR mode. For the time being we've been using EDIDs to maintain a list of quirks for panels that safely do support the VESA backlight interface. Adding support for Intel's HDR backlight interface in addition however, should finally allow us to auto-detect eDP backlight controls properly so long as we probe like so: * If the panel's VBT reports VESA backlight support, assume it really does support it * If the panel's VBT reports DDI backlight controls: * First probe for Intel's HDR backlight interface * If that fails, probe for VESA's backlight interface * If that fails, assume no DPCD backlight control * If the panel's VBT reports any other backlight type: just assume it doesn't have DPCD backlight controls Changes since v4: * Fix checkpatch issues Changes since v3: * Stop using drm_device and use drm_i915_private instead * Don't forget to return from intel_dp_aux_hdr_get_backlight() if we fail to read the current backlight mode from the DPCD * s/uint8_t/u8/ * Remove unneeded parenthesis in intel_dp_aux_hdr_enable_backlight() * Use drm_dbg_kms() in intel_dp_aux_init_backlight_funcs() Signed-off-by: Lyude Paul Reviewed-by: Jani Nikula Cc: thaytan@noraisin.net Cc: Vasily Khoruzhick Reported-by: kernel test robot --- .../drm/i915/display/intel_display_types.h | 9 +- .../drm/i915/display/intel_dp_aux_backlight.c | 247 ++++++++++++++++-- drivers/gpu/drm/i915/display/intel_panel.c | 40 ++- drivers/gpu/drm/i915/display/intel_panel.h | 4 + 4 files changed, 269 insertions(+), 31 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index ee23cc1518df..a2ea651ece79 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -261,7 +261,14 @@ struct intel_panel { struct pwm_state pwm_state; /* DPCD backlight */ - u8 pwmgen_bit_count; + union { + struct { + u8 pwmgen_bit_count; + } vesa; + struct { + bool sdr_uses_aux; + } intel; + } edp; struct backlight_device *device; diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c index de764dae1e66..9b0589cf8d17 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c +++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c @@ -22,8 +22,26 @@ * */ +/* + * Laptops with Intel GPUs which have panels that support controlling the + * backlight through DP AUX can actually use two different interfaces: Intel's + * proprietary DP AUX backlight interface, and the standard VESA backlight + * interface. Unfortunately, at the time of writing this a lot of laptops will + * advertise support for the standard VESA backlight interface when they + * don't properly support it. However, on these systems the Intel backlight + * interface generally does work properly. Additionally, these systems will + * usually just indicate that they use PWM backlight controls in their VBIOS + * for some reason. + */ + #include "intel_display_types.h" #include "intel_dp_aux_backlight.h" +#include "intel_panel.h" + +/* TODO: + * Implement HDR, right now we just implement the bare minimum to bring us back into SDR mode so we + * can make people's backlights work in the mean time + */ /* * DP AUX registers for Intel's proprietary HDR backlight interface. We define @@ -77,6 +95,178 @@ #define INTEL_EDP_BRIGHTNESS_OPTIMIZATION_1 0x359 +/* Intel EDP backlight callbacks */ +static bool +intel_dp_aux_supports_hdr_backlight(struct intel_connector *connector) +{ + struct drm_i915_private *i915 = to_i915(connector->base.dev); + struct intel_dp *intel_dp = enc_to_intel_dp(connector->encoder); + struct drm_dp_aux *aux = &intel_dp->aux; + struct intel_panel *panel = &connector->panel; + int ret; + u8 tcon_cap[4]; + + ret = drm_dp_dpcd_read(aux, INTEL_EDP_HDR_TCON_CAP0, tcon_cap, sizeof(tcon_cap)); + if (ret < 0) + return false; + + if (!(tcon_cap[1] & INTEL_EDP_HDR_TCON_BRIGHTNESS_NITS_CAP)) + return false; + + if (tcon_cap[0] >= 1) { + drm_dbg_kms(&i915->drm, "Detected Intel HDR backlight interface version %d\n", + tcon_cap[0]); + } else { + drm_dbg_kms(&i915->drm, "Detected unsupported HDR backlight interface version %d\n", + tcon_cap[0]); + return false; + } + + panel->backlight.edp.intel.sdr_uses_aux = + tcon_cap[2] & INTEL_EDP_SDR_TCON_BRIGHTNESS_AUX_CAP; + + return true; +} + +static u32 +intel_dp_aux_hdr_get_backlight(struct intel_connector *connector, enum pipe pipe) +{ + struct drm_i915_private *i915 = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + struct intel_dp *intel_dp = enc_to_intel_dp(connector->encoder); + u8 tmp; + u8 buf[2] = { 0 }; + + if (drm_dp_dpcd_readb(&intel_dp->aux, INTEL_EDP_HDR_GETSET_CTRL_PARAMS, &tmp) < 0) { + drm_err(&i915->drm, "Failed to read current backlight mode from DPCD\n"); + return 0; + } + + if (!(tmp & INTEL_EDP_HDR_TCON_BRIGHTNESS_AUX_ENABLE)) { + if (!panel->backlight.edp.intel.sdr_uses_aux) { + u32 pwm_level = panel->backlight.pwm_funcs->get(connector, pipe); + + return intel_panel_backlight_level_from_pwm(connector, pwm_level); + } + + /* Assume 100% brightness if backlight controls aren't enabled yet */ + return panel->backlight.max; + } + + if (drm_dp_dpcd_read(&intel_dp->aux, INTEL_EDP_BRIGHTNESS_NITS_LSB, buf, sizeof(buf)) < 0) { + drm_err(&i915->drm, "Failed to read brightness from DPCD\n"); + return 0; + } + + return (buf[1] << 8 | buf[0]); +} + +static void +intel_dp_aux_hdr_set_aux_backlight(const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct drm_device *dev = connector->base.dev; + struct intel_dp *intel_dp = enc_to_intel_dp(connector->encoder); + u8 buf[4] = { 0 }; + + buf[0] = level & 0xFF; + buf[1] = (level & 0xFF00) >> 8; + + if (drm_dp_dpcd_write(&intel_dp->aux, INTEL_EDP_BRIGHTNESS_NITS_LSB, buf, 4) < 0) + drm_err(dev, "Failed to write brightness level to DPCD\n"); +} + +static void +intel_dp_aux_hdr_set_backlight(const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct intel_panel *panel = &connector->panel; + + if (panel->backlight.edp.intel.sdr_uses_aux) { + intel_dp_aux_hdr_set_aux_backlight(conn_state, level); + } else { + const u32 pwm_level = intel_panel_backlight_level_to_pwm(connector, level); + + intel_panel_set_pwm_level(conn_state, pwm_level); + } +} + +static void +intel_dp_aux_hdr_enable_backlight(const struct intel_crtc_state *crtc_state, + const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct intel_panel *panel = &connector->panel; + struct drm_i915_private *i915 = to_i915(connector->base.dev); + struct intel_dp *intel_dp = enc_to_intel_dp(connector->encoder); + int ret; + u8 old_ctrl, ctrl; + + ret = drm_dp_dpcd_readb(&intel_dp->aux, INTEL_EDP_HDR_GETSET_CTRL_PARAMS, &old_ctrl); + if (ret < 0) { + drm_err(&i915->drm, "Failed to read current backlight control mode: %d\n", ret); + return; + } + + ctrl = old_ctrl; + if (panel->backlight.edp.intel.sdr_uses_aux) { + ctrl |= INTEL_EDP_HDR_TCON_BRIGHTNESS_AUX_ENABLE; + intel_dp_aux_hdr_set_aux_backlight(conn_state, level); + } else { + u32 pwm_level = intel_panel_backlight_level_to_pwm(connector, level); + + panel->backlight.pwm_funcs->enable(crtc_state, conn_state, pwm_level); + + ctrl &= ~INTEL_EDP_HDR_TCON_BRIGHTNESS_AUX_ENABLE; + } + + if (ctrl != old_ctrl) + if (drm_dp_dpcd_writeb(&intel_dp->aux, INTEL_EDP_HDR_GETSET_CTRL_PARAMS, ctrl) < 0) + drm_err(&i915->drm, "Failed to configure DPCD brightness controls\n"); +} + +static void +intel_dp_aux_hdr_disable_backlight(const struct drm_connector_state *conn_state, u32 level) +{ + struct intel_connector *connector = to_intel_connector(conn_state->connector); + struct intel_panel *panel = &connector->panel; + + /* Nothing to do for AUX based backlight controls */ + if (panel->backlight.edp.intel.sdr_uses_aux) + return; + + /* Note we want the actual pwm_level to be 0, regardless of pwm_min */ + panel->backlight.pwm_funcs->disable(conn_state, intel_panel_invert_pwm_level(connector, 0)); +} + +static int +intel_dp_aux_hdr_setup_backlight(struct intel_connector *connector, enum pipe pipe) +{ + struct drm_i915_private *i915 = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + int ret; + + if (panel->backlight.edp.intel.sdr_uses_aux) { + drm_dbg_kms(&i915->drm, "SDR backlight is controlled through DPCD\n"); + } else { + drm_dbg_kms(&i915->drm, "SDR backlight is controlled through PWM\n"); + + ret = panel->backlight.pwm_funcs->setup(connector, pipe); + if (ret < 0) { + drm_err(&i915->drm, + "Failed to setup SDR backlight controls through PWM: %d\n", ret); + return ret; + } + } + + panel->backlight.max = 512; + panel->backlight.min = 0; + panel->backlight.level = intel_dp_aux_hdr_get_backlight(connector, pipe); + panel->backlight.enabled = panel->backlight.level != 0; + + return 0; +} + /* VESA backlight callbacks */ static void set_vesa_backlight_enable(struct intel_dp *intel_dp, bool enable) { @@ -195,7 +385,7 @@ static bool intel_dp_aux_vesa_set_pwm_freq(struct intel_connector *connector) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_dp *intel_dp = intel_attached_dp(connector); - const u8 pn = connector->panel.backlight.pwmgen_bit_count; + const u8 pn = connector->panel.backlight.edp.vesa.pwmgen_bit_count; int freq, fxp, f, fxp_actual, fxp_min, fxp_max; freq = dev_priv->vbt.backlight.pwm_freq_hz; @@ -236,6 +426,7 @@ intel_dp_aux_vesa_enable_backlight(const struct intel_crtc_state *crtc_state, struct drm_i915_private *i915 = dp_to_i915(intel_dp); struct intel_panel *panel = &connector->panel; u8 dpcd_buf, new_dpcd_buf, edp_backlight_mode; + u8 pwmgen_bit_count = panel->backlight.edp.vesa.pwmgen_bit_count; if (drm_dp_dpcd_readb(&intel_dp->aux, DP_EDP_BACKLIGHT_MODE_SET_REGISTER, &dpcd_buf) != 1) { @@ -256,7 +447,7 @@ intel_dp_aux_vesa_enable_backlight(const struct intel_crtc_state *crtc_state, if (drm_dp_dpcd_writeb(&intel_dp->aux, DP_EDP_PWMGEN_BIT_COUNT, - panel->backlight.pwmgen_bit_count) < 0) + pwmgen_bit_count) < 0) drm_dbg_kms(&i915->drm, "Failed to write aux pwmgen bit count\n"); @@ -364,7 +555,7 @@ static u32 intel_dp_aux_vesa_calc_max_backlight(struct intel_connector *connecto "Failed to write aux pwmgen bit count\n"); return max_backlight; } - panel->backlight.pwmgen_bit_count = pn; + panel->backlight.edp.vesa.pwmgen_bit_count = pn; max_backlight = (1 << pn) - 1; @@ -405,6 +596,14 @@ intel_dp_aux_supports_vesa_backlight(struct intel_connector *connector) return false; } +static const struct intel_panel_bl_funcs intel_dp_hdr_bl_funcs = { + .setup = intel_dp_aux_hdr_setup_backlight, + .enable = intel_dp_aux_hdr_enable_backlight, + .disable = intel_dp_aux_hdr_disable_backlight, + .set = intel_dp_aux_hdr_set_backlight, + .get = intel_dp_aux_hdr_get_backlight, +}; + static const struct intel_panel_bl_funcs intel_dp_vesa_bl_funcs = { .setup = intel_dp_aux_vesa_setup_backlight, .enable = intel_dp_aux_vesa_enable_backlight, @@ -413,36 +612,34 @@ static const struct intel_panel_bl_funcs intel_dp_vesa_bl_funcs = { .get = intel_dp_aux_vesa_get_backlight, }; -int intel_dp_aux_init_backlight_funcs(struct intel_connector *intel_connector) +int intel_dp_aux_init_backlight_funcs(struct intel_connector *connector) { - struct intel_panel *panel = &intel_connector->panel; - struct intel_dp *intel_dp = enc_to_intel_dp(intel_connector->encoder); + struct drm_device *dev = connector->base.dev; + struct intel_panel *panel = &connector->panel; + struct intel_dp *intel_dp = enc_to_intel_dp(connector->encoder); struct drm_i915_private *i915 = dp_to_i915(intel_dp); - if (i915->params.enable_dpcd_backlight == 0 || - !intel_dp_aux_supports_vesa_backlight(intel_connector)) + if (i915->params.enable_dpcd_backlight == 0) return -ENODEV; /* - * There are a lot of machines that don't advertise the backlight - * control interface to use properly in their VBIOS, :\ + * A lot of eDP panels in the wild will report supporting both the + * Intel proprietary backlight control interface, and the VESA + * backlight control interface. Many of these panels are liars though, + * and will only work with the Intel interface. So, always probe for + * that first. */ - if (i915->vbt.backlight.type != - INTEL_BACKLIGHT_VESA_EDP_AUX_INTERFACE && - i915->params.enable_dpcd_backlight != 1 && - !drm_dp_has_quirk(&intel_dp->desc, intel_dp->edid_quirks, - DP_QUIRK_FORCE_DPCD_BACKLIGHT)) { - drm_info(&i915->drm, - "Panel advertises DPCD backlight support, but " - "VBT disagrees. If your backlight controls " - "don't work try booting with " - "i915.enable_dpcd_backlight=1. If your machine " - "needs this, please file a _new_ bug report on " - "drm/i915, see " FDO_BUG_URL " for details.\n"); - return -ENODEV; + if (intel_dp_aux_supports_hdr_backlight(connector)) { + drm_dbg_kms(dev, "Using Intel proprietary eDP backlight controls\n"); + panel->backlight.funcs = &intel_dp_hdr_bl_funcs; + return 0; } - panel->backlight.funcs = &intel_dp_vesa_bl_funcs; + if (intel_dp_aux_supports_vesa_backlight(connector)) { + drm_dbg_kms(dev, "Using VESA eDP backlight controls\n"); + panel->backlight.funcs = &intel_dp_vesa_bl_funcs; + return 0; + } - return 0; + return -ENODEV; } diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c index cc2386ef6219..6b1e53664d3d 100644 --- a/drivers/gpu/drm/i915/display/intel_panel.c +++ b/drivers/gpu/drm/i915/display/intel_panel.c @@ -511,7 +511,7 @@ static u32 scale_hw_to_user(struct intel_connector *connector, 0, user_max); } -static u32 intel_panel_invert_pwm_level(struct intel_connector *connector, u32 val) +u32 intel_panel_invert_pwm_level(struct intel_connector *connector, u32 val) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; @@ -539,6 +539,36 @@ void intel_panel_set_pwm_level(const struct drm_connector_state *conn_state, u32 panel->backlight.pwm_funcs->set(conn_state, val); } +u32 intel_panel_backlight_level_to_pwm(struct intel_connector *connector, u32 val) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + + drm_WARN_ON_ONCE(&dev_priv->drm, + panel->backlight.max == 0 || panel->backlight.pwm_level_max == 0); + + val = scale(val, panel->backlight.min, panel->backlight.max, + panel->backlight.pwm_level_min, panel->backlight.pwm_level_max); + + return intel_panel_invert_pwm_level(connector, val); +} + +u32 intel_panel_backlight_level_from_pwm(struct intel_connector *connector, u32 val) +{ + struct drm_i915_private *dev_priv = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + + drm_WARN_ON_ONCE(&dev_priv->drm, + panel->backlight.max == 0 || panel->backlight.pwm_level_max == 0); + + if (dev_priv->params.invert_brightness > 0 || + (dev_priv->params.invert_brightness == 0 && dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS)) + val = panel->backlight.pwm_level_max - (val - panel->backlight.pwm_level_min); + + return scale(val, panel->backlight.pwm_level_min, panel->backlight.pwm_level_max, + panel->backlight.min, panel->backlight.max); +} + static u32 lpt_get_backlight(struct intel_connector *connector, enum pipe unused) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); @@ -2132,10 +2162,6 @@ intel_panel_init_backlight_funcs(struct intel_panel *panel) container_of(panel, struct intel_connector, panel); struct drm_i915_private *dev_priv = to_i915(connector->base.dev); - if (connector->base.connector_type == DRM_MODE_CONNECTOR_eDP && - intel_dp_aux_init_backlight_funcs(connector) == 0) - return; - if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI && intel_dsi_dcs_init_backlight_funcs(connector) == 0) return; @@ -2163,6 +2189,10 @@ intel_panel_init_backlight_funcs(struct intel_panel *panel) panel->backlight.pwm_funcs = &i9xx_pwm_funcs; } + if (connector->base.connector_type == DRM_MODE_CONNECTOR_eDP && + intel_dp_aux_init_backlight_funcs(connector) == 0) + return; + /* We're using a standard PWM backlight interface */ panel->backlight.funcs = &pwm_bl_funcs; } diff --git a/drivers/gpu/drm/i915/display/intel_panel.h b/drivers/gpu/drm/i915/display/intel_panel.h index 5b813fe90557..1d340f77bffc 100644 --- a/drivers/gpu/drm/i915/display/intel_panel.h +++ b/drivers/gpu/drm/i915/display/intel_panel.h @@ -49,6 +49,10 @@ struct drm_display_mode * intel_panel_edid_fixed_mode(struct intel_connector *connector); struct drm_display_mode * intel_panel_vbt_fixed_mode(struct intel_connector *connector); +void intel_panel_set_pwm_level(const struct drm_connector_state *conn_state, u32 level); +u32 intel_panel_invert_pwm_level(struct intel_connector *connector, u32 level); +u32 intel_panel_backlight_level_to_pwm(struct intel_connector *connector, u32 level); +u32 intel_panel_backlight_level_from_pwm(struct intel_connector *connector, u32 val); #if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE) int intel_backlight_device_register(struct intel_connector *connector); From patchwork Thu Jan 14 22:17:08 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lyude Paul X-Patchwork-Id: 12021019 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EBE9BC433DB for ; Thu, 14 Jan 2021 22:18:07 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B35E623A34 for ; Thu, 14 Jan 2021 22:18:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B35E623A34 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 53A6A6E03F; Thu, 14 Jan 2021 22:18:07 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [63.128.21.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9439E6E03F for ; Thu, 14 Jan 2021 22:18:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1610662684; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=R8k2qB9J1QcA6kVSG6qxMVytc989hIPxyyIW0u0SkCQ=; b=Y7u7iW/G/KpG3LWFnoNaEmll78dVjVJXMnfDE1+ARfPSf1ajjxkX+mf7nIPPPbvuFvSiPH edZDPvFMlCSV0DrGtudNOzasrxNi5nTb3qUo1JkttWTpERz085ur79rmEnQnxOxRTNDyBf ubYXW6HnwvMFoUlDkvPe7T1mXG7p+zQ= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-454-0b1e-rgiMVmlFPQDvPQRBw-1; Thu, 14 Jan 2021 17:18:00 -0500 X-MC-Unique: 0b1e-rgiMVmlFPQDvPQRBw-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id E98AD802B40; Thu, 14 Jan 2021 22:17:58 +0000 (UTC) Received: from Whitewolf.redhat.com (ovpn-115-182.rdu2.redhat.com [10.10.115.182]) by smtp.corp.redhat.com (Postfix) with ESMTP id 75A5210016F6; Thu, 14 Jan 2021 22:17:57 +0000 (UTC) From: Lyude Paul To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Date: Thu, 14 Jan 2021 17:17:08 -0500 Message-Id: <20210114221709.2261452-5-lyude@redhat.com> In-Reply-To: <20210114221709.2261452-1-lyude@redhat.com> References: <20210114221709.2261452-1-lyude@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Subject: [Intel-gfx] [PATCH v7 4/5] drm/i915/dp: Allow forcing specific interfaces through enable_dpcd_backlight X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jani Nikula , open list , Vasily Khoruzhick , David Airlie , Sean Paul Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Since we now support controlling panel backlights through DPCD using both the standard VESA interface, and Intel's proprietary HDR backlight interface, we should allow the user to be able to explicitly choose between one or the other in the event that we're wrong about panels reliably reporting support for the Intel HDR interface. So, this commit adds support for this by introducing two new enable_dpcd_backlight options: 2 which forces i915 to only probe for the VESA interface, and 3 which forces i915 to only probe for the Intel backlight interface (might be useful if we find panels in the wild that report the VESA interface in their VBT, but actually only support the Intel backlight interface). v3: * Rebase Signed-off-by: Lyude Paul Reviewed-by: Jani Nikula Cc: thaytan@noraisin.net Cc: Vasily Khoruzhick --- .../drm/i915/display/intel_dp_aux_backlight.c | 45 +++++++++++++++++-- drivers/gpu/drm/i915/i915_params.c | 2 +- 2 files changed, 43 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c index 9b0589cf8d17..31a478f63d52 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c +++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c @@ -612,15 +612,54 @@ static const struct intel_panel_bl_funcs intel_dp_vesa_bl_funcs = { .get = intel_dp_aux_vesa_get_backlight, }; +enum intel_dp_aux_backlight_modparam { + INTEL_DP_AUX_BACKLIGHT_AUTO = -1, + INTEL_DP_AUX_BACKLIGHT_OFF = 0, + INTEL_DP_AUX_BACKLIGHT_ON = 1, + INTEL_DP_AUX_BACKLIGHT_FORCE_VESA = 2, + INTEL_DP_AUX_BACKLIGHT_FORCE_INTEL = 3, +}; + int intel_dp_aux_init_backlight_funcs(struct intel_connector *connector) { struct drm_device *dev = connector->base.dev; struct intel_panel *panel = &connector->panel; struct intel_dp *intel_dp = enc_to_intel_dp(connector->encoder); struct drm_i915_private *i915 = dp_to_i915(intel_dp); + bool try_intel_interface = false, try_vesa_interface = false; - if (i915->params.enable_dpcd_backlight == 0) + /* Check the VBT and user's module parameters to figure out which + * interfaces to probe + */ + switch (i915->params.enable_dpcd_backlight) { + case INTEL_DP_AUX_BACKLIGHT_OFF: return -ENODEV; + case INTEL_DP_AUX_BACKLIGHT_AUTO: + switch (i915->vbt.backlight.type) { + case INTEL_BACKLIGHT_VESA_EDP_AUX_INTERFACE: + try_vesa_interface = true; + break; + case INTEL_BACKLIGHT_DISPLAY_DDI: + try_intel_interface = true; + try_vesa_interface = true; + break; + default: + return -ENODEV; + } + break; + case INTEL_DP_AUX_BACKLIGHT_ON: + if (i915->vbt.backlight.type != INTEL_BACKLIGHT_VESA_EDP_AUX_INTERFACE) + try_intel_interface = true; + + try_vesa_interface = true; + break; + case INTEL_DP_AUX_BACKLIGHT_FORCE_VESA: + try_vesa_interface = true; + break; + case INTEL_DP_AUX_BACKLIGHT_FORCE_INTEL: + try_intel_interface = true; + break; + } /* * A lot of eDP panels in the wild will report supporting both the @@ -629,13 +668,13 @@ int intel_dp_aux_init_backlight_funcs(struct intel_connector *connector) * and will only work with the Intel interface. So, always probe for * that first. */ - if (intel_dp_aux_supports_hdr_backlight(connector)) { + if (try_intel_interface && intel_dp_aux_supports_hdr_backlight(connector)) { drm_dbg_kms(dev, "Using Intel proprietary eDP backlight controls\n"); panel->backlight.funcs = &intel_dp_hdr_bl_funcs; return 0; } - if (intel_dp_aux_supports_vesa_backlight(connector)) { + if (try_vesa_interface && intel_dp_aux_supports_vesa_backlight(connector)) { drm_dbg_kms(dev, "Using VESA eDP backlight controls\n"); panel->backlight.funcs = &intel_dp_vesa_bl_funcs; return 0; diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c index 7f139ea4a90b..6939634e56ed 100644 --- a/drivers/gpu/drm/i915/i915_params.c +++ b/drivers/gpu/drm/i915/i915_params.c @@ -185,7 +185,7 @@ i915_param_named_unsafe(inject_probe_failure, uint, 0400, i915_param_named(enable_dpcd_backlight, int, 0400, "Enable support for DPCD backlight control" - "(-1=use per-VBT LFP backlight type setting [default], 0=disabled, 1=enabled)"); + "(-1=use per-VBT LFP backlight type setting [default], 0=disabled, 1=enable, 2=force VESA interface, 3=force Intel interface)"); #if IS_ENABLED(CONFIG_DRM_I915_GVT) i915_param_named(enable_gvt, bool, 0400, From patchwork Thu Jan 14 22:17:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lyude Paul X-Patchwork-Id: 12021021 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9259DC433E6 for ; Thu, 14 Jan 2021 22:18:20 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 4773C23A24 for ; Thu, 14 Jan 2021 22:18:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4773C23A24 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id DA0446E055; Thu, 14 Jan 2021 22:18:17 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [216.205.24.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id D88A36E04A for ; Thu, 14 Jan 2021 22:18:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1610662695; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=zPgXBlFuRCUwWxcnIgwYV3s/oBtx+OlPGM2/f2ccOfk=; b=aA+FBawxzUiJGINNKjzYSUiuiXq795Yb0uQj+l7UpTIYuGOnXs69B1faEMzCRa7NEcDFh2 awicqz1AkU+daPClAOSIaheKLzJqXmjWbJ7YJQHfQPZdLa857ms3/6ECxnXwrr0IkQZwvB b1Rx4iqPCkv3YCCK50+T2Q7hMeS21oM= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-419-CwKamGZAO4O_MY9v1sJDyQ-1; Thu, 14 Jan 2021 17:18:12 -0500 X-MC-Unique: CwKamGZAO4O_MY9v1sJDyQ-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id A07408066E0; Thu, 14 Jan 2021 22:18:08 +0000 (UTC) Received: from Whitewolf.redhat.com (ovpn-115-182.rdu2.redhat.com [10.10.115.182]) by smtp.corp.redhat.com (Postfix) with ESMTP id 914A010002A6; Thu, 14 Jan 2021 22:18:05 +0000 (UTC) From: Lyude Paul To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Date: Thu, 14 Jan 2021 17:17:09 -0500 Message-Id: <20210114221709.2261452-6-lyude@redhat.com> In-Reply-To: <20210114221709.2261452-1-lyude@redhat.com> References: <20210114221709.2261452-1-lyude@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Subject: [Intel-gfx] [PATCH v7 5/5] drm/dp: Revert "drm/dp: Introduce EDID-based quirks" X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: David Airlie , Vasily Khoruzhick , Dave Airlie , Wambui Karuga , Thomas Zimmermann , Jani Nikula , Lucas De Marchi , Maxime Ripard , Sean Paul , open list Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" This reverts commit 0883ce8146ed6074c76399f4e70dbed788582e12. Originally these quirks were added because of the issues with using the eDP backlight interfaces on certain laptop panels, which made it impossible to properly probe for DPCD backlight support without having a whitelist for panels that we know have working VESA backlight control interfaces over DPCD. As well, it should be noted it was impossible to use the normal sink OUI for recognizing these panels as none of them actually filled out their OUIs, hence needing to resort to checking EDIDs. At the time we weren't really sure why certain panels had issues with DPCD backlight controls, but we eventually figured out that there was a second interface that these problematic laptop panels actually did work with and advertise properly: Intel's proprietary backlight interface for HDR panels. So far the testing we've done hasn't brought any panels to light that advertise this interface and don't support it properly, which means we finally have a real solution to this problem. As a result, we now have no need for the force DPCD backlight quirk, and furthermore this also removes the need for any kind of EDID quirk checking in DRM. So, let's just revert it for now since we were the only driver using this. v3: * Rebase v2: * Fix indenting error picked up by checkpatch in intel_edp_init_connector() Signed-off-by: Lyude Paul Acked-by: Jani Nikula Cc: thaytan@noraisin.net Cc: Vasily Khoruzhick --- drivers/gpu/drm/drm_dp_helper.c | 83 +------------------ drivers/gpu/drm/drm_dp_mst_topology.c | 3 +- .../drm/i915/display/intel_display_types.h | 1 - drivers/gpu/drm/i915/display/intel_dp.c | 9 +- drivers/gpu/drm/i915/display/intel_dp_mst.c | 3 +- drivers/gpu/drm/i915/display/intel_psr.c | 2 +- include/drm/drm_dp_helper.h | 21 +---- 7 files changed, 9 insertions(+), 113 deletions(-) diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index 3ecde451f523..19dbdeb581cb 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -1236,7 +1236,7 @@ bool drm_dp_read_sink_count_cap(struct drm_connector *connector, return connector->connector_type != DRM_MODE_CONNECTOR_eDP && dpcd[DP_DPCD_REV] >= DP_DPCD_REV_11 && dpcd[DP_DOWNSTREAMPORT_PRESENT] & DP_DWN_STRM_PORT_PRESENT && - !drm_dp_has_quirk(desc, 0, DP_DPCD_QUIRK_NO_SINK_COUNT); + !drm_dp_has_quirk(desc, DP_DPCD_QUIRK_NO_SINK_COUNT); } EXPORT_SYMBOL(drm_dp_read_sink_count_cap); @@ -1957,87 +1957,6 @@ drm_dp_get_quirks(const struct drm_dp_dpcd_ident *ident, bool is_branch) #undef DEVICE_ID_ANY #undef DEVICE_ID -struct edid_quirk { - u8 mfg_id[2]; - u8 prod_id[2]; - u32 quirks; -}; - -#define MFG(first, second) { (first), (second) } -#define PROD_ID(first, second) { (first), (second) } - -/* - * Some devices have unreliable OUIDs where they don't set the device ID - * correctly, and as a result we need to use the EDID for finding additional - * DP quirks in such cases. - */ -static const struct edid_quirk edid_quirk_list[] = { - /* Optional 4K AMOLED panel in the ThinkPad X1 Extreme 2nd Generation - * only supports DPCD backlight controls - */ - { MFG(0x4c, 0x83), PROD_ID(0x41, 0x41), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) }, - /* - * Some Dell CML 2020 systems have panels support both AUX and PWM - * backlight control, and some only support AUX backlight control. All - * said panels start up in AUX mode by default, and we don't have any - * support for disabling HDR mode on these panels which would be - * required to switch to PWM backlight control mode (plus, I'm not - * even sure we want PWM backlight controls over DPCD backlight - * controls anyway...). Until we have a better way of detecting these, - * force DPCD backlight mode on all of them. - */ - { MFG(0x06, 0xaf), PROD_ID(0x9b, 0x32), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) }, - { MFG(0x06, 0xaf), PROD_ID(0xeb, 0x41), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) }, - { MFG(0x4d, 0x10), PROD_ID(0xc7, 0x14), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) }, - { MFG(0x4d, 0x10), PROD_ID(0xe6, 0x14), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) }, - { MFG(0x4c, 0x83), PROD_ID(0x47, 0x41), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) }, - { MFG(0x09, 0xe5), PROD_ID(0xde, 0x08), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) }, -}; - -#undef MFG -#undef PROD_ID - -/** - * drm_dp_get_edid_quirks() - Check the EDID of a DP device to find additional - * DP-specific quirks - * @edid: The EDID to check - * - * While OUIDs are meant to be used to recognize a DisplayPort device, a lot - * of manufacturers don't seem to like following standards and neglect to fill - * the dev-ID in, making it impossible to only use OUIDs for determining - * quirks in some cases. This function can be used to check the EDID and look - * up any additional DP quirks. The bits returned by this function correspond - * to the quirk bits in &drm_dp_quirk. - * - * Returns: a bitmask of quirks, if any. The driver can check this using - * drm_dp_has_quirk(). - */ -u32 drm_dp_get_edid_quirks(const struct edid *edid) -{ - const struct edid_quirk *quirk; - u32 quirks = 0; - int i; - - if (!edid) - return 0; - - for (i = 0; i < ARRAY_SIZE(edid_quirk_list); i++) { - quirk = &edid_quirk_list[i]; - if (memcmp(quirk->mfg_id, edid->mfg_id, - sizeof(edid->mfg_id)) == 0 && - memcmp(quirk->prod_id, edid->prod_code, - sizeof(edid->prod_code)) == 0) - quirks |= quirk->quirks; - } - - DRM_DEBUG_KMS("DP sink: EDID mfg %*phD prod-ID %*phD quirks: 0x%04x\n", - (int)sizeof(edid->mfg_id), edid->mfg_id, - (int)sizeof(edid->prod_code), edid->prod_code, quirks); - - return quirks; -} -EXPORT_SYMBOL(drm_dp_get_edid_quirks); - /** * drm_dp_read_desc - read sink/branch descriptor from DPCD * @aux: DisplayPort AUX channel diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c index 18b15a4aee2d..475939138b21 100644 --- a/drivers/gpu/drm/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/drm_dp_mst_topology.c @@ -5824,8 +5824,7 @@ struct drm_dp_aux *drm_dp_mst_dsc_aux_for_port(struct drm_dp_mst_port *port) if (drm_dp_read_desc(port->mgr->aux, &desc, true)) return NULL; - if (drm_dp_has_quirk(&desc, 0, - DP_DPCD_QUIRK_DSC_WITHOUT_VIRTUAL_DPCD) && + if (drm_dp_has_quirk(&desc, DP_DPCD_QUIRK_DSC_WITHOUT_VIRTUAL_DPCD) && port->mgr->dpcd[DP_DPCD_REV] >= DP_DPCD_REV_14 && port->parent == port->mgr->mst_primary) { u8 downstreamport; diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index a2ea651ece79..01efe9a3ebfa 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -1401,7 +1401,6 @@ struct intel_dp { int max_link_rate; /* sink or branch descriptor */ struct drm_dp_desc desc; - u32 edid_quirks; struct drm_dp_aux aux; u32 aux_busy_last_status; u8 train_set[4]; diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index ec94ebdaf7b8..3855f3d32c37 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -162,8 +162,7 @@ static void intel_dp_set_sink_rates(struct intel_dp *intel_dp) int i, max_rate; int max_lttpr_rate; - if (drm_dp_has_quirk(&intel_dp->desc, 0, - DP_DPCD_QUIRK_CAN_DO_MAX_LINK_RATE_3_24_GBPS)) { + if (drm_dp_has_quirk(&intel_dp->desc, DP_DPCD_QUIRK_CAN_DO_MAX_LINK_RATE_3_24_GBPS)) { /* Needed, e.g., for Apple MBP 2017, 15 inch eDP Retina panel */ static const int quirk_rates[] = { 162000, 270000, 324000 }; @@ -2435,8 +2434,7 @@ intel_dp_compute_config(struct intel_encoder *encoder, struct intel_connector *intel_connector = intel_dp->attached_connector; struct intel_digital_connector_state *intel_conn_state = to_intel_digital_connector_state(conn_state); - bool constant_n = drm_dp_has_quirk(&intel_dp->desc, 0, - DP_DPCD_QUIRK_CONSTANT_N); + bool constant_n = drm_dp_has_quirk(&intel_dp->desc, DP_DPCD_QUIRK_CONSTANT_N); int ret = 0, output_bpp; if (HAS_PCH_SPLIT(dev_priv) && !HAS_DDI(dev_priv) && port != PORT_A) @@ -6031,7 +6029,6 @@ intel_dp_set_edid(struct intel_dp *intel_dp) } drm_dp_cec_set_edid(&intel_dp->aux, edid); - intel_dp->edid_quirks = drm_dp_get_edid_quirks(edid); } static void @@ -6045,7 +6042,6 @@ intel_dp_unset_edid(struct intel_dp *intel_dp) intel_dp->has_hdmi_sink = false; intel_dp->has_audio = false; - intel_dp->edid_quirks = 0; intel_dp->dfp.max_bpc = 0; intel_dp->dfp.max_dotclock = 0; @@ -7099,7 +7095,6 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp, if (edid) { if (drm_add_edid_modes(connector, edid)) { drm_connector_update_edid_property(connector, edid); - intel_dp->edid_quirks = drm_dp_get_edid_quirks(edid); } else { kfree(edid); edid = ERR_PTR(-EINVAL); diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c index f76e2c2a83b8..d6a1b961a0e8 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c @@ -53,8 +53,7 @@ static int intel_dp_mst_compute_link_config(struct intel_encoder *encoder, struct drm_i915_private *i915 = to_i915(connector->base.dev); const struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode; - bool constant_n = drm_dp_has_quirk(&intel_dp->desc, 0, - DP_DPCD_QUIRK_CONSTANT_N); + bool constant_n = drm_dp_has_quirk(&intel_dp->desc, DP_DPCD_QUIRK_CONSTANT_N); int bpp, slots = -EINVAL; crtc_state->lane_count = limits->max_lane_count; diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c index c24ae69426cf..1e6c1fa59d4a 100644 --- a/drivers/gpu/drm/i915/display/intel_psr.c +++ b/drivers/gpu/drm/i915/display/intel_psr.c @@ -305,7 +305,7 @@ void intel_psr_init_dpcd(struct intel_dp *intel_dp) drm_dbg_kms(&dev_priv->drm, "eDP panel supports PSR version %x\n", intel_dp->psr_dpcd[0]); - if (drm_dp_has_quirk(&intel_dp->desc, 0, DP_DPCD_QUIRK_NO_PSR)) { + if (drm_dp_has_quirk(&intel_dp->desc, DP_DPCD_QUIRK_NO_PSR)) { drm_dbg_kms(&dev_priv->drm, "PSR support not currently available for this panel\n"); return; diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index 6236f212da61..edffd1dcca3e 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -2029,16 +2029,13 @@ struct drm_dp_desc { int drm_dp_read_desc(struct drm_dp_aux *aux, struct drm_dp_desc *desc, bool is_branch); -u32 drm_dp_get_edid_quirks(const struct edid *edid); /** * enum drm_dp_quirk - Display Port sink/branch device specific quirks * * Display Port sink and branch devices in the wild have a variety of bugs, try * to collect them here. The quirks are shared, but it's up to the drivers to - * implement workarounds for them. Note that because some devices have - * unreliable OUIDs, the EDID of sinks should also be checked for quirks using - * drm_dp_get_edid_quirks(). + * implement workarounds for them. */ enum drm_dp_quirk { /** @@ -2070,16 +2067,6 @@ enum drm_dp_quirk { * The DSC caps can be read from the physical aux instead. */ DP_DPCD_QUIRK_DSC_WITHOUT_VIRTUAL_DPCD, - /** - * @DP_QUIRK_FORCE_DPCD_BACKLIGHT: - * - * The device is telling the truth when it says that it uses DPCD - * backlight controls, even if the system's firmware disagrees. This - * quirk should be checked against both the ident and panel EDID. - * When present, the driver should honor the DPCD backlight - * capabilities advertised. - */ - DP_QUIRK_FORCE_DPCD_BACKLIGHT, /** * @DP_DPCD_QUIRK_CAN_DO_MAX_LINK_RATE_3_24_GBPS: * @@ -2092,16 +2079,14 @@ enum drm_dp_quirk { /** * drm_dp_has_quirk() - does the DP device have a specific quirk * @desc: Device descriptor filled by drm_dp_read_desc() - * @edid_quirks: Optional quirk bitmask filled by drm_dp_get_edid_quirks() * @quirk: Quirk to query for * * Return true if DP device identified by @desc has @quirk. */ static inline bool -drm_dp_has_quirk(const struct drm_dp_desc *desc, u32 edid_quirks, - enum drm_dp_quirk quirk) +drm_dp_has_quirk(const struct drm_dp_desc *desc, enum drm_dp_quirk quirk) { - return (desc->quirks | edid_quirks) & BIT(quirk); + return desc->quirks & BIT(quirk); } #ifdef CONFIG_DRM_DP_CEC