This initial patch adds support for automated testing of the source device to the i915 driver. Most of this patch is infrastructure for the tests; follow up patches will add support for the individual tests with updates to ACK the tests that are supported (or NAK if the test fails/is unsupported).
Signed-off-by: Todd Previte <[email protected]> --- drivers/gpu/drm/i915/intel_dp.c | 108 +++++++++++++++++++++++++++++++++++++++- include/drm/drm_dp_helper.h | 3 +- 2 files changed, 108 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 9770160..a042d59 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -64,6 +64,26 @@ static const struct dp_link_dpll vlv_dpll[] = { { .p1 = 2, .p2 = 2, .n = 1, .m1 = 2, .m2 = 27 } } }; +/****************************************************************************** +******** Displayport automated testing ******** +******************************************************************************/ +/* Automated testing function - link training */ +static bool +intel_dp_autotest_link_training(struct intel_dp *intel_dp); +/* Automated testing function - video test pattern */ +static bool +intel_dp_autotest_video_pattern(struct intel_dp *intel_dp); +/* Automated testing function - EDID read */ +static bool +intel_dp_autotest_edid(struct intel_dp *intel_dp); +/* Automated testing function - PHY pattern */ +static bool +intel_dp_autotest_phy_pattern(struct intel_dp *intel_dp); +/* Automated testing function - faux pattern */ +static bool +intel_dp_autotest_faux_pattern(struct intel_dp *intel_dp); +/*****************************************************************************/ + /** * is_edp - is the given port attached to an eDP panel (either CPU or PCH) * @intel_dp: DP struct @@ -2732,9 +2752,93 @@ intel_dp_get_sink_irq(struct intel_dp *intel_dp, u8 *sink_irq_vector) static void intel_dp_handle_test_request(struct intel_dp *intel_dp) +{ + uint8_t response = DP_TEST_NAK; + bool result = false; + uint8_t rxdata = 0; + + printk(KERN_DEBUG "Displayport: Recvd automated test request\n"); + /* Read DP_TEST_REQUEST register to identify the requested test */ + intel_dp_aux_native_read_retry(intel_dp, DP_TEST_REQUEST, &rxdata, 1); + /* Determine which test has been requested */ + switch (rxdata) { + /* Supported tests handled below */ + case DP_TEST_LINK_TRAINING: + printk(KERN_DEBUG "Displayport: Executing LINK_TRAINING request\n"); + result = intel_dp_autotest_link_training(intel_dp); + break; + case DP_TEST_LINK_VIDEO_PATTERN: + printk(KERN_DEBUG "Displayport: Executing TEST_PATTERN request\n"); + result = intel_dp_autotest_video_pattern(intel_dp); + break; + case DP_TEST_LINK_EDID_READ: + printk(KERN_DEBUG "Displayport: Executing EDID request\n"); + result = intel_dp_autotest_edid(intel_dp); + break; + case DP_TEST_LINK_PHY_TEST_PATTERN: + printk(KERN_DEBUG "Displayport: Executing PHY_PATTERN request\n"); + result = intel_dp_autotest_phy_pattern(intel_dp); + break; + case DP_TEST_LINK_FAUX_TEST_PATTERN: + printk(KERN_DEBUG "Displayport: Executing FAUX_PATTERN request \n"); + result = intel_dp_autotest_faux_pattern(intel_dp); + break; + /* Unsupported test case or something went wrong */ + default: + /* Log error here for unhandled test request */ + printk(KERN_DEBUG "Displayport: Error - unhandled automated test type\n"); + break; + } + /* Check for a valid test execution */ + if (result == true) + response = DP_TEST_ACK; + /* Send ACK/NAK based on action taken above */ + intel_dp_aux_native_write_1(intel_dp, DP_TEST_RESPONSE, response); +} + +/* Automated testing function - link training */ +static bool +intel_dp_autotest_link_training(struct intel_dp *intel_dp) +{ + /* Automated test function hook */ + bool test_result = false; + return test_result; +} + +/* Automated testing function - video test pattern */ +static bool +intel_dp_autotest_video_pattern(struct intel_dp *intel_dp) +{ + /* Automated test function hook */ + bool test_result = false; + return test_result; +} + +/* Automated testing function - EDID read */ +static bool +intel_dp_autotest_edid(struct intel_dp *intel_dp) +{ + /* Automated test function hook */ + bool test_result = false; + return test_result; +} + +/* Automated testing function - PHY pattern */ +static bool +intel_dp_autotest_phy_pattern(struct intel_dp *intel_dp) +{ + /* Automated test function hook */ + bool test_result = false; + return test_result; +} + +/* Automated testing function - faux pattern */ +static bool +intel_dp_autotest_faux_pattern(struct intel_dp *intel_dp) { - /* NAK by default */ - intel_dp_aux_native_write_1(intel_dp, DP_TEST_RESPONSE, DP_TEST_NAK); + /* Automated test function hook */ + bool test_result = false; + return test_result; } /* diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index ae8dbfb..9fa544b 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -266,9 +266,10 @@ #define DP_TEST_REQUEST 0x218 # define DP_TEST_LINK_TRAINING (1 << 0) -# define DP_TEST_LINK_PATTERN (1 << 1) +# define DP_TEST_LINK_VIDEO_PATTERN (1 << 1) # define DP_TEST_LINK_EDID_READ (1 << 2) # define DP_TEST_LINK_PHY_TEST_PATTERN (1 << 3) /* DPCD >= 1.1 */ +# define DP_TEST_LINK_FAUX_TEST_PATTERN (1 << 4) /* DPCD >= 1.2 */ #define DP_TEST_LINK_RATE 0x219 # define DP_LINK_RATE_162 (0x6) -- 1.8.1.2 _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
