From patchwork Tue Apr 26 19:32:07 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= X-Patchwork-Id: 12827848 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id ED384C4332F for ; Tue, 26 Apr 2022 19:32:36 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7160A10E4F0; Tue, 26 Apr 2022 19:32:36 +0000 (UTC) Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7E3D110E4F0 for ; Tue, 26 Apr 2022 19:32:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1651001555; x=1682537555; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=yOmcIZv/85II4xsML9xHi3OsKxe0OPMGmzEEI6VY3KI=; b=kM+Z4+enTqRtRHtr2k/GmAmexNQQWCDWrJ7N2FD/QY+51H2AjXoiqdyw sDWzgGpqmXVsH6x/7k0vTQBKORSdgJMW1rG25TZHIBCL3LAMjR7pn0U04 LoXa/udwwNivQub+VcIsKMxP5VHhRwSQH/oh6wxvk0ASb5xUt/SG80w5T RadllZFScO3Tr27C/lj1CdUUy98HGP2qIKVSSwUTfnBLWngYDi0iDXwNx wRUUjxzAT6/OxbNUu06yki5gwdtOrLPk3a/ZpX6u/Y/SQ5eXqz1gX6X3j Wyoff1vmKnTTlPz6JxRR8c16hvxw5Aw1SduFmfMjOGILbTv+hTvolpWfb A==; X-IronPort-AV: E=McAfee;i="6400,9594,10329"; a="264546015" X-IronPort-AV: E=Sophos;i="5.90,291,1643702400"; d="scan'208";a="264546015" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Apr 2022 12:32:34 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,291,1643702400"; d="scan'208";a="539001776" Received: from stinkpipe.fi.intel.com (HELO stinkbox) ([10.237.72.51]) by orsmga002.jf.intel.com with SMTP; 26 Apr 2022 12:32:32 -0700 Received: by stinkbox (sSMTP sendmail emulation); Tue, 26 Apr 2022 22:32:31 +0300 From: Ville Syrjala To: intel-gfx@lists.freedesktop.org Date: Tue, 26 Apr 2022 22:32:07 +0300 Message-Id: <20220426193222.3422-4-ville.syrjala@linux.intel.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220426193222.3422-1-ville.syrjala@linux.intel.com> References: <20220426193222.3422-1-ville.syrjala@linux.intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v3 03/18] drm/i915/bios: Get access to the tail end of the LFP data block 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 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Ville Syrjälä We need to start parsing stuff from the tail end of the LFP data block. This is made awkward by the fact that the fp_timing table has variable size. So we must use a bit more finesse to get the tail end, and to make sure we allocate enough memory for it to make sure our struct representation fits. v2: Rebase due to the preallocation of BDB blocks v3: Rebase due to min_size WARN relocation v4: Document BDB_LVDS_LFP_DATA vs. BDB_LVDS_LFP_DATA_PTRS order (Jani) Reviewed-by: Jani Nikula Signed-off-by: Ville Syrjälä --- drivers/gpu/drm/i915/display/intel_bios.c | 43 ++++++++++++++++++- drivers/gpu/drm/i915/display/intel_vbt_defs.h | 17 ++++++++ 2 files changed, 59 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c index 7bc3d55b6bb0..ecfce9adfbbb 100644 --- a/drivers/gpu/drm/i915/display/intel_bios.c +++ b/drivers/gpu/drm/i915/display/intel_bios.c @@ -186,10 +186,14 @@ static const struct { .min_size = sizeof(struct bdb_edp), }, { .section_id = BDB_LVDS_OPTIONS, .min_size = sizeof(struct bdb_lvds_options), }, + /* + * BDB_LVDS_LFP_DATA depends on BDB_LVDS_LFP_DATA_PTRS, + * so keep the two ordered. + */ { .section_id = BDB_LVDS_LFP_DATA_PTRS, .min_size = sizeof(struct bdb_lvds_lfp_data_ptrs), }, { .section_id = BDB_LVDS_LFP_DATA, - .min_size = sizeof(struct bdb_lvds_lfp_data), }, + .min_size = 0, /* special case */ }, { .section_id = BDB_LVDS_BACKLIGHT, .min_size = sizeof(struct bdb_lfp_backlight_data), }, { .section_id = BDB_LFP_POWER, @@ -204,6 +208,23 @@ static const struct { .min_size = sizeof(struct bdb_generic_dtd), }, }; +static size_t lfp_data_min_size(struct drm_i915_private *i915) +{ + const struct bdb_lvds_lfp_data_ptrs *ptrs; + size_t size; + + ptrs = find_section(i915, BDB_LVDS_LFP_DATA_PTRS); + if (!ptrs) + return 0; + + size = sizeof(struct bdb_lvds_lfp_data); + if (ptrs->panel_name.table_size) + size = max(size, ptrs->panel_name.offset + + sizeof(struct bdb_lvds_lfp_data_tail)); + + return size; +} + static bool validate_lfp_data_ptrs(const void *bdb, const struct bdb_lvds_lfp_data_ptrs *ptrs) { @@ -491,6 +512,9 @@ static void init_bdb_blocks(struct drm_i915_private *i915, enum bdb_block_id section_id = bdb_blocks[i].section_id; size_t min_size = bdb_blocks[i].min_size; + if (section_id == BDB_LVDS_LFP_DATA) + min_size = lfp_data_min_size(i915); + init_bdb_block(i915, bdb, section_id, min_size); } } @@ -561,6 +585,16 @@ get_lvds_fp_timing(const struct bdb_lvds_lfp_data *data, return (const void *)data + ptrs->ptr[index].fp_timing.offset; } +static const struct bdb_lvds_lfp_data_tail * +get_lfp_data_tail(const struct bdb_lvds_lfp_data *data, + const struct bdb_lvds_lfp_data_ptrs *ptrs) +{ + if (ptrs->panel_name.table_size) + return (const void *)data + ptrs->panel_name.offset; + else + return NULL; +} + /* Parse general panel options */ static void parse_panel_options(struct drm_i915_private *i915) @@ -665,6 +699,7 @@ static void parse_lfp_data(struct drm_i915_private *i915) { const struct bdb_lvds_lfp_data *data; + const struct bdb_lvds_lfp_data_tail *tail; const struct bdb_lvds_lfp_data_ptrs *ptrs; ptrs = find_section(i915, BDB_LVDS_LFP_DATA_PTRS); @@ -677,6 +712,12 @@ parse_lfp_data(struct drm_i915_private *i915) if (!i915->vbt.lfp_lvds_vbt_mode) parse_lfp_panel_dtd(i915, data, ptrs); + + tail = get_lfp_data_tail(data, ptrs); + if (!tail) + return; + + (void)tail; } static void diff --git a/drivers/gpu/drm/i915/display/intel_vbt_defs.h b/drivers/gpu/drm/i915/display/intel_vbt_defs.h index e4a11c3e3f3e..64551d206aeb 100644 --- a/drivers/gpu/drm/i915/display/intel_vbt_defs.h +++ b/drivers/gpu/drm/i915/display/intel_vbt_defs.h @@ -783,6 +783,23 @@ struct lvds_lfp_panel_name { u8 name[13]; } __packed; +struct lvds_lfp_black_border { + u8 top; /* 227 */ + u8 bottom; /* 227 */ + u8 left; /* 238 */ + u8 right; /* 238 */ +} __packed; + +struct bdb_lvds_lfp_data_tail { + struct lvds_lfp_panel_name panel_name[16]; /* 156-163? */ + u16 scaling_enable; /* 187 */ + u8 seamless_drrs_min_refresh_rate[16]; /* 188 */ + u8 pixel_overlap_count[16]; /* 208 */ + struct lvds_lfp_black_border black_border[16]; /* 227 */ + u16 dual_lfp_port_sync_enable; /* 231 */ + u16 gpu_dithering_for_banding_artifacts; /* 245 */ +} __packed; + /* * Block 43 - LFP Backlight Control Data Block */