From patchwork Tue Aug 14 09:53:25 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Sharma, Shashank" X-Patchwork-Id: 10565231 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 611CA15A6 for ; Tue, 14 Aug 2018 09:46:09 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5096C291AE for ; Tue, 14 Aug 2018 09:46:09 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4519A2942F; Tue, 14 Aug 2018 09:46:09 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id D9469291AE for ; Tue, 14 Aug 2018 09:46:08 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 68E666E0B4; Tue, 14 Aug 2018 09:46:08 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4A02D6E0B4 for ; Tue, 14 Aug 2018 09:46:06 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 14 Aug 2018 02:46:06 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.53,237,1531810800"; d="scan'208";a="64783041" Received: from shashanks-linuxbox.iind.intel.com ([10.223.161.29]) by orsmga007.jf.intel.com with ESMTP; 14 Aug 2018 02:46:04 -0700 From: Shashank Sharma To: intel-gfx@lists.freedesktop.org Date: Tue, 14 Aug 2018 15:23:25 +0530 Message-Id: <1534240406-10534-8-git-send-email-shashank.sharma@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1534240406-10534-1-git-send-email-shashank.sharma@intel.com> References: <1534240406-10534-1-git-send-email-shashank.sharma@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v10 7/8] drm/i915: Write AVI infoframes for Parade LSPCON X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP Different LSPCON vendors specify their custom methods to pass AVI infoframes to the LSPCON chip, so does Parade tech. This patch adds functions to arrange and write AVI infoframes into Parade LSPCON chips. V2: rebase V3: Added r-b from Maarten V4: rebase V5: rebase V6: rebase V7: Fixed checkpatch warnings for alignment V8: Rebase V9: Rebase V10: Rebase Cc: Imre Deak Cc: Ville Syrjälä Cc: Maarten Lankhorst Reviewed-by: Maarten Lankhorst Signed-off-by: Shashank Sharma --- drivers/gpu/drm/i915/intel_lspcon.c | 117 +++++++++++++++++++++++++++++++++++- 1 file changed, 116 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_lspcon.c b/drivers/gpu/drm/i915/intel_lspcon.c index 80b9afa..8e0477e 100644 --- a/drivers/gpu/drm/i915/intel_lspcon.c +++ b/drivers/gpu/drm/i915/intel_lspcon.c @@ -37,6 +37,12 @@ #define LSPCON_MCA_AVI_IF_KICKOFF (1 << 0) #define LSPCON_MCA_AVI_IF_HANDLED (1 << 1) +/* AUX addresses to write Parade AVI IF */ +#define LSPCON_PARADE_AVI_IF_WRITE_OFFSET 0x516 +#define LSPCON_PARADE_AVI_IF_CTRL 0x51E +#define LSPCON_PARADE_AVI_IF_KICKOFF (1 << 7) +#define LSPCON_PARADE_AVI_IF_DATA_SIZE 32 + static struct intel_dp *lspcon_to_intel_dp(struct intel_lspcon *lspcon) { struct intel_digital_port *dig_port = @@ -240,6 +246,111 @@ static void lspcon_resume_in_pcon_wa(struct intel_lspcon *lspcon) DRM_DEBUG_KMS("LSPCON DP descriptor mismatch after resume\n"); } +static bool lspcon_parade_fw_ready(struct drm_dp_aux *aux) +{ + u8 avi_if_ctrl; + u8 retry; + ssize_t ret; + + /* Check if LSPCON FW is ready for data */ + for (retry = 0; retry < 5; retry++) { + if (retry) + usleep_range(200, 300); + + ret = drm_dp_dpcd_read(aux, LSPCON_PARADE_AVI_IF_CTRL, + &avi_if_ctrl, 1); + if (ret < 0) { + DRM_ERROR("Failed to read AVI IF control\n"); + return false; + } + + if ((avi_if_ctrl & LSPCON_PARADE_AVI_IF_KICKOFF) == 0) + return true; + } + + DRM_ERROR("Parade FW not ready to accept AVI IF\n"); + return false; +} + +static bool _lspcon_parade_write_infoframe_blocks(struct drm_dp_aux *aux, + uint8_t *avi_buf) +{ + u8 avi_if_ctrl; + u8 block_count = 0; + u8 *data; + uint16_t reg; + ssize_t ret; + + while (block_count < 4) { + if (!lspcon_parade_fw_ready(aux)) { + DRM_DEBUG_KMS("LSPCON FW not ready, block %d\n", + block_count); + return false; + } + + reg = LSPCON_PARADE_AVI_IF_WRITE_OFFSET; + data = avi_buf + block_count * 8; + ret = drm_dp_dpcd_write(aux, reg, data, 8); + if (ret < 0) { + DRM_ERROR("Failed to write AVI IF block %d\n", + block_count); + return false; + } + + /* + * Once a block of data is written, we have to inform the FW + * about this by writing into avi infoframe control register: + * - set the kickoff bit[7] to 1 + * - write the block no. to bits[1:0] + */ + reg = LSPCON_PARADE_AVI_IF_CTRL; + avi_if_ctrl = LSPCON_PARADE_AVI_IF_KICKOFF | block_count; + ret = drm_dp_dpcd_write(aux, reg, &avi_if_ctrl, 1); + if (ret < 0) { + DRM_ERROR("Failed to update (0x%x), block %d\n", + reg, block_count); + return false; + } + + block_count++; + } + + DRM_DEBUG_KMS("Wrote AVI IF blocks successfully\n"); + return true; +} + +static bool _lspcon_write_avi_infoframe_parade(struct drm_dp_aux *aux, + const uint8_t *frame, + ssize_t len) +{ + uint8_t avi_if[LSPCON_PARADE_AVI_IF_DATA_SIZE] = {1, }; + + /* + * Parade's frames contains 32 bytes of data, divided + * into 4 frames: + * Token byte (first byte of first frame, must be non-zero) + * HB0 to HB2 from AVI IF (3 bytes header) + * PB0 to PB27 from AVI IF (28 bytes data) + * So it should look like this + * first block: | | + * next 3 blocks: |||| + */ + + if (len > LSPCON_PARADE_AVI_IF_DATA_SIZE - 1) { + DRM_ERROR("Invalid length of infoframes\n"); + return false; + } + + memcpy(&avi_if[1], frame, len); + + if (!_lspcon_parade_write_infoframe_blocks(aux, avi_if)) { + DRM_DEBUG_KMS("Failed to write infoframe blocks\n"); + return false; + } + + return true; +} + static bool _lspcon_write_avi_infoframe_mca(struct drm_dp_aux *aux, const uint8_t *buffer, ssize_t len) { @@ -304,7 +415,7 @@ void lspcon_write_infoframe(struct drm_encoder *encoder, unsigned int type, const void *frame, ssize_t len) { - bool ret = true; + bool ret; struct intel_dp *intel_dp = enc_to_intel_dp(encoder); struct intel_lspcon *lspcon = enc_to_intel_lspcon(encoder); @@ -315,6 +426,10 @@ void lspcon_write_infoframe(struct drm_encoder *encoder, if (lspcon->vendor == LSPCON_VENDOR_MCA) ret = _lspcon_write_avi_infoframe_mca(&intel_dp->aux, frame, len); + else + ret = _lspcon_write_avi_infoframe_parade(&intel_dp->aux, + frame, len); + if (!ret) { DRM_ERROR("Failed to write AVI infoframes\n"); return;