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Tue, 28 Aug 2018 12:26:07 +0200 Received: from lvloginb.cadence.com (10.165.177.11) by maileu3.global.cadence.com (10.160.88.99) with Microsoft SMTP Server id 15.0.1367.3 via Frontend Transport; Tue, 28 Aug 2018 12:26:07 +0200 Received: from lvloginb.cadence.com (localhost [127.0.0.1]) by lvloginb.cadence.com (8.14.4/8.14.4) with ESMTP id w7SAPstC004226; Tue, 28 Aug 2018 11:25:54 +0100 Received: (from dkos@localhost) by lvloginb.cadence.com (8.14.4/8.14.4/Submit) id w7SAPs6h004197; Tue, 28 Aug 2018 11:25:54 +0100 From: Damian Kos To: David Airlie , Rob Herring , "Mark Rutland" , Archit Taneja , Andrzej Hajda , Laurent Pinchart , Gustavo Padovan , Maarten Lankhorst , Sean Paul , Sandy Huang , =?utf-8?q?He?= =?utf-8?q?iko_St=C3=BCbner?= , Damian Kos , Quentin Schulz , , , , , Subject: [PATCH v3 3/5] drm/dp: make dp_link_status and dp_get_lane_status usable from outside of the core Date: Tue, 28 Aug 2018 11:24:46 +0100 Message-ID: <1535451894-2518-4-git-send-email-dkos@cadence.com> X-Mailer: git-send-email 1.9.0 In-Reply-To: <1535451894-2518-1-git-send-email-dkos@cadence.com> References: <1535451894-2518-1-git-send-email-dkos@cadence.com> MIME-Version: 1.0 X-OrganizationHeadersPreserved: maileu3.global.cadence.com X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:158.140.1.28; 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DM6PR07MB4409; 20:fmHJwyQZMx70a4odWXF5wXvcH2uetSOYPelEEPbmUK29Ee5yuczxGTiqHXd6XnyESvetysMn+YMnxMGIiYviOp5Fjf8isPYRN2x6ZxnzUKI0lLkY4Taz39xtLB5Mj/n/HFLvyvq3q4Ha7lK6JvC9Th2WEyjCV6pByDKJZuVyt5BeUX1olevY3dnbva2I5fPCNtBR0rzVSw/Xzidtn+5jMoEnPYmO+Rr6TORvJmE73l7DjCrJvnOjEbWFqjIEbsmN X-OriginatorOrg: cadence.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Aug 2018 10:26:02.2582 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 971fa1b7-bbfb-459e-b7f8-08d60cd0a7f9 X-MS-Exchange-CrossTenant-Id: d36035c5-6ce6-4662-a3dc-e762e61ae4c9 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=d36035c5-6ce6-4662-a3dc-e762e61ae4c9; Ip=[158.140.1.28]; Helo=[sjmaillnx1.cadence.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR07MB4409 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180828_032616_308828_B9E10319 X-CRM114-Status: GOOD ( 10.73 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pgaj@cadence.com, ltyrala@cadence.com, stelford@cadence.com, jartur@cadence.com, piotrs@cadence.com Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Quentin Schulz dp_link_status and dp_get_lane_status are pretty generic and can be used for other means, so let's make it "public". This adds drm_dp_link_status and drm_dp_get_lane_status to the header file and add the appropriate EXPORT_SYMBOL for it so that it can be used by other drivers, be they compiled built-in or as modules. Signed-off-by: Damian Kos --- drivers/gpu/drm/drm_dp_helper.c | 20 +++++++++++--------- include/drm/drm_dp_helper.h | 3 +++ 2 files changed, 14 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index 4b5bf6ee7fa7..ee9ec2ccf878 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -43,19 +43,21 @@ */ /* Helpers for DP link training */ -static u8 dp_link_status(const u8 link_status[DP_LINK_STATUS_SIZE], int r) +u8 drm_dp_link_status(const u8 link_status[DP_LINK_STATUS_SIZE], int r) { return link_status[r - DP_LANE0_1_STATUS]; } +EXPORT_SYMBOL(drm_dp_link_status); -static u8 dp_get_lane_status(const u8 link_status[DP_LINK_STATUS_SIZE], +u8 drm_dp_get_lane_status(const u8 link_status[DP_LINK_STATUS_SIZE], int lane) { int i = DP_LANE0_1_STATUS + (lane >> 1); int s = (lane & 1) * 4; - u8 l = dp_link_status(link_status, i); + u8 l = drm_dp_link_status(link_status, i); return (l >> s) & 0xf; } +EXPORT_SYMBOL(drm_dp_get_lane_status); bool drm_dp_channel_eq_ok(const u8 link_status[DP_LINK_STATUS_SIZE], int lane_count) @@ -64,12 +66,12 @@ bool drm_dp_channel_eq_ok(const u8 link_status[DP_LINK_STATUS_SIZE], u8 lane_status; int lane; - lane_align = dp_link_status(link_status, - DP_LANE_ALIGN_STATUS_UPDATED); + lane_align = drm_dp_link_status(link_status, + DP_LANE_ALIGN_STATUS_UPDATED); if ((lane_align & DP_INTERLANE_ALIGN_DONE) == 0) return false; for (lane = 0; lane < lane_count; lane++) { - lane_status = dp_get_lane_status(link_status, lane); + lane_status = drm_dp_get_lane_status(link_status, lane); if ((lane_status & DP_CHANNEL_EQ_BITS) != DP_CHANNEL_EQ_BITS) return false; } @@ -84,7 +86,7 @@ bool drm_dp_clock_recovery_ok(const u8 link_status[DP_LINK_STATUS_SIZE], u8 lane_status; for (lane = 0; lane < lane_count; lane++) { - lane_status = dp_get_lane_status(link_status, lane); + lane_status = drm_dp_get_lane_status(link_status, lane); if ((lane_status & DP_LANE_CR_DONE) == 0) return false; } @@ -99,7 +101,7 @@ u8 drm_dp_get_adjust_request_voltage(const u8 link_status[DP_LINK_STATUS_SIZE], int s = ((lane & 1) ? DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT : DP_ADJUST_VOLTAGE_SWING_LANE0_SHIFT); - u8 l = dp_link_status(link_status, i); + u8 l = drm_dp_link_status(link_status, i); return ((l >> s) & 0x3) << DP_TRAIN_VOLTAGE_SWING_SHIFT; } @@ -112,7 +114,7 @@ u8 drm_dp_get_adjust_request_pre_emphasis(const u8 link_status[DP_LINK_STATUS_SI int s = ((lane & 1) ? DP_ADJUST_PRE_EMPHASIS_LANE1_SHIFT : DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT); - u8 l = dp_link_status(link_status, i); + u8 l = drm_dp_link_status(link_status, i); return ((l >> s) & 0x3) << DP_TRAIN_PRE_EMPHASIS_SHIFT; } diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index 06a478679781..9930b2b269f2 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -952,6 +952,9 @@ #define DP_MST_LOGICAL_PORT_0 8 #define DP_LINK_STATUS_SIZE 6 + +u8 drm_dp_link_status(const u8 link_status[DP_LINK_STATUS_SIZE], int r); +u8 drm_dp_get_lane_status(const u8 link_status[DP_LINK_STATUS_SIZE], int lane); bool drm_dp_channel_eq_ok(const u8 link_status[DP_LINK_STATUS_SIZE], int lane_count); bool drm_dp_clock_recovery_ok(const u8 link_status[DP_LINK_STATUS_SIZE],