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drm/msm/dp: Add DP compliance tests on Snapdragon Chipsets

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add event thread to execute events serially from event queue. Also
timeout mode is supported  which allow an event be deferred to be
executed at later time. Both link and phy compliant tests had been
done successfully.

Changes in v2:
-- Fix potential deadlock by removing redundant connect_mutex
-- Check and enable link clock during modeset
-- Drop unused code and fix function prototypes.
-- set sink power to normal operation state (D0) before DPCD read

Changes in v3:
-- push idle pattern at main link before timing generator off
-- add timeout handles for both connect and disconnect

Changes in v4:
-- add ST_SUSPEND_PENDING to handles suspend/modeset test operations
-- clear dp phy aux interrupt status when ERR_DPPHY_AUX error
-- send segment addr during edid read
-- clear bpp depth before MISC register write

Changes in v5:
-- add ST_SUSPENDED to fix crash at resume

Changes in v6:
-- at msm_dp_display_enable() do not return until resume_done to avoid
   kms commit timeout

Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Kuogee Hsieh
2020-09-11 20:36:42 +00:00
committed by Rob Clark
parent 220b856a3d
commit 8ede2ecc3e
19 changed files with 1053 additions and 460 deletions
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22
drivers/gpu/drm/msm/dp/dp_link.c
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@@ -38,7 +38,6 @@ struct dp_link_private {
struct dp_link dp_link;
struct dp_link_request request;
struct mutex test_response_mutex;
struct mutex psm_mutex;
u8 link_status[DP_LINK_STATUS_SIZE];
};
@@ -580,17 +579,18 @@ static int dp_link_parse_phy_test_params(struct dp_link_private *link)
return rlen;
}
link->dp_link.phy_params.phy_test_pattern_sel = data;
link->dp_link.phy_params.phy_test_pattern_sel = data & 0x07;
DRM_DEBUG_DP("phy_test_pattern_sel = 0x%x\n", data);
switch (data) {
case DP_LINK_QUAL_PATTERN_DISABLE:
case DP_LINK_QUAL_PATTERN_D10_2:
case DP_LINK_QUAL_PATTERN_ERROR_RATE:
case DP_LINK_QUAL_PATTERN_PRBS7:
case DP_LINK_QUAL_PATTERN_80BIT_CUSTOM:
case DP_LINK_QUAL_PATTERN_HBR2_EYE:
case DP_PHY_TEST_PATTERN_SEL_MASK:
case DP_PHY_TEST_PATTERN_NONE:
case DP_PHY_TEST_PATTERN_D10_2:
case DP_PHY_TEST_PATTERN_ERROR_COUNT:
case DP_PHY_TEST_PATTERN_PRBS7:
case DP_PHY_TEST_PATTERN_80BIT_CUSTOM:
case DP_PHY_TEST_PATTERN_CP2520:
return 0;
default:
return -EINVAL;
@@ -661,7 +661,6 @@ static int dp_link_parse_request(struct dp_link_private *link)
DRM_DEBUG_DP("Test:(0x%x) requested\n", data);
link->request.test_requested = data;
if (link->request.test_requested == DP_TEST_LINK_PHY_TEST_PATTERN) {
ret = dp_link_parse_phy_test_params(link);
if (ret)
@@ -789,10 +788,8 @@ bool dp_link_send_test_response(struct dp_link *dp_link)
link = container_of(dp_link, struct dp_link_private, dp_link);
mutex_lock(&link->test_response_mutex);
ret = drm_dp_dpcd_writeb(link->aux, DP_TEST_RESPONSE,
dp_link->test_response);
mutex_unlock(&link->test_response_mutex);
return ret == 1;
}
@@ -1028,11 +1025,9 @@ int dp_link_process_request(struct dp_link *dp_link)
link = container_of(dp_link, struct dp_link_private, dp_link);
mutex_lock(&link->test_response_mutex);
dp_link_reset_data(link);
dp_link_parse_sink_status_field(link);
mutex_unlock(&link->test_response_mutex);
if (link->request.test_requested == DP_TEST_LINK_EDID_READ) {
dp_link->sink_request |= DP_TEST_LINK_EDID_READ;
@@ -1206,7 +1201,6 @@ struct dp_link *dp_link_get(struct device *dev, struct drm_dp_aux *aux)
link->dev = dev;
link->aux = aux;
mutex_init(&link->test_response_mutex);
mutex_init(&link->psm_mutex);
dp_link = &link->dp_link;