From mboxrd@z Thu Jan 1 00:00:00 1970 From: Todd Previte Subject: [PATCH 1/6] drm/i915: Add automated testing support for Displayport compliance testing Date: Tue, 24 Jun 2014 15:12:49 -0700 Message-ID: <1403647974-42377-2-git-send-email-tprevite@gmail.com> References: <1403647974-42377-1-git-send-email-tprevite@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-pb0-f45.google.com (mail-pb0-f45.google.com [209.85.160.45]) by gabe.freedesktop.org (Postfix) with ESMTP id 9F5956E5B9 for ; Tue, 24 Jun 2014 15:13:30 -0700 (PDT) Received: by mail-pb0-f45.google.com with SMTP id rr13so800014pbb.18 for ; Tue, 24 Jun 2014 15:13:30 -0700 (PDT) In-Reply-To: <1403647974-42377-1-git-send-email-tprevite@gmail.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org Add the skeleton framework for supporting automation for Displayport compliance testing. This patch adds the necessary framework for the source device to appropriately responded to test automation requests from a sink device. Signed-off-by: Todd Previte --- drivers/gpu/drm/i915/intel_dp.c | 84 ++++++++++++++++++++++++++++++++++++++++- 1 file changed, 82 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index b5ec489..3bd1780 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -3328,11 +3328,91 @@ intel_dp_get_sink_irq(struct intel_dp *intel_dp, u8 *sink_irq_vector) sink_irq_vector, 1) == 1; } +/* Displayport compliance testing - Link training */ +static uint8_t +intel_dp_autotest_link_training(struct intel_dp *intel_dp) +{ + uint8_t test_result = DP_TEST_NAK; + return test_result; +} + +/* Displayport compliance testing - Video pattern testing */ +static uint8_t +intel_dp_autotest_video_pattern(struct intel_dp *intel_dp) +{ + uint8_t test_result = DP_TEST_NAK; + return test_result; +} + +/* Displayport compliance testing - EDID operations */ +static uint8_t +intel_dp_autotest_edid(struct intel_dp *intel_dp) +{ + uint8_t test_result = DP_TEST_NAK; + return test_result; +} + +/* Displayport compliance testing - PHY pattern testing */ +static uint8_t +intel_dp_autotest_phy_pattern(struct intel_dp *intel_dp) +{ + uint8_t test_result = DP_TEST_NAK; + return test_result; +} + +/* Displayport compliance testing - Fast AUX transactions (optional) */ +static uint8_t +intel_dp_autotest_faux_pattern(struct intel_dp *intel_dp) +{ + uint8_t test_result = DP_TEST_NAK; + printk("Displayport: Fast AUX (FAUX) not supported.\n"); + return test_result; +} + static void intel_dp_handle_test_request(struct intel_dp *intel_dp) { - /* NAK by default */ - drm_dp_dpcd_writeb(&intel_dp->aux, DP_TEST_RESPONSE, DP_TEST_NAK); + uint8_t response = DP_TEST_NAK; + uint8_t rxdata = 0; + int ret = 0; + + DRM_DEBUG_KMS("Displayport: Received automated test request\n"); + /* Read DP_TEST_REQUEST register to identify the requested test */ + ret = drm_dp_dpcd_read(&intel_dp->aux, DP_TEST_REQUEST, &rxdata, 1); + + /* Determine which test has been requested */ + switch (rxdata) { + /* ACK/NAK response based on test function response + Unimplemented/unsupported tests will NAK */ + case DP_TEST_LINK_TRAINING: + DRM_DEBUG_KMS("Displayport: Executing LINK_TRAINING request\n"); + response = intel_dp_autotest_link_training(intel_dp); + break; + case DP_TEST_LINK_VIDEO_PATTERN: + DRM_DEBUG_KMS("Displayport: Executing TEST_PATTERN request\n"); + response = intel_dp_autotest_video_pattern(intel_dp); + break; + case DP_TEST_LINK_EDID_READ: + DRM_DEBUG_KMS("Displayport: Executing EDID request\n"); + response = intel_dp_autotest_edid(intel_dp); + break; + case DP_TEST_LINK_PHY_TEST_PATTERN: + DRM_DEBUG_KMS("Displayport: Executing PHY_PATTERN request\n"); + response = intel_dp_autotest_phy_pattern(intel_dp); + break; + /* FAUX is optional in DP 1.2*/ + case DP_TEST_LINK_FAUX_PATTERN: + DRM_DEBUG_KMS("Displayport: Executing FAUX_PATTERN request \n"); + response = intel_dp_autotest_faux_pattern(intel_dp); + break; + /* Unsupported test case or something went wrong */ + default: + /* Log error here for unhandled test request */ + DRM_DEBUG_KMS("Displayport: Error - unhandled automated test request\n"); + break; + } + /* Send the response from the test result */ + ret = drm_dp_dpcd_write(&intel_dp->aux, DP_TEST_RESPONSE, &response, 1); } /* -- 1.9.1