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drm/amd/display: Add CP_IRQ clear capability

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[Why]
Currently we do not clear the CP_IRQ bit upon receiving it.

[How]
Added a function to clear CP_IRQ bit.

Signed-off-by: Harmanprit Tatla <harmanprit.tatla@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Harmanprit Tatla 2020-08-19 17:39:45 -04:00 committed by Alex Deucher
parent 498563cf9c
commit 958000cb24
3 changed files with 29 additions and 0 deletions
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9
drivers/gpu/drm/amd/display/modules/hdcp/hdcp.c
View File

@ -470,6 +470,15 @@ enum mod_hdcp_status mod_hdcp_process_event(struct mod_hdcp *hdcp,
if (reset_status != MOD_HDCP_STATUS_SUCCESS)
push_error_status(hdcp, reset_status);
}
/* Clear CP_IRQ status if needed */
if (event_ctx.event == MOD_HDCP_EVENT_CPIRQ &&
event_ctx.unexpected_event == 0) {
status = mod_hdcp_clear_cp_irq_status(hdcp);
if (status != MOD_HDCP_STATUS_SUCCESS)
push_error_status(hdcp, status);
}
return status;
}

1
drivers/gpu/drm/amd/display/modules/hdcp/hdcp.h
View File

@ -386,6 +386,7 @@ enum mod_hdcp_status mod_hdcp_write_eks(struct mod_hdcp *hdcp);
enum mod_hdcp_status mod_hdcp_write_repeater_auth_ack(struct mod_hdcp *hdcp);
enum mod_hdcp_status mod_hdcp_write_stream_manage(struct mod_hdcp *hdcp);
enum mod_hdcp_status mod_hdcp_write_content_type(struct mod_hdcp *hdcp);
enum mod_hdcp_status mod_hdcp_clear_cp_irq_status(struct mod_hdcp *hdcp);
/* hdcp version helpers */
static inline uint8_t is_dp_hdcp(struct mod_hdcp *hdcp)

19
drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c
View File

@ -645,3 +645,22 @@ enum mod_hdcp_status mod_hdcp_write_content_type(struct mod_hdcp *hdcp)
status = MOD_HDCP_STATUS_INVALID_OPERATION;
return status;
}
enum mod_hdcp_status mod_hdcp_clear_cp_irq_status(struct mod_hdcp *hdcp)
{
uint8_t clear_cp_irq_bit = 2;
uint32_t size = 1;
if (is_dp_hdcp(hdcp)) {
if (hdcp->connection.link.dp.rev >= 0x14)
return hdcp->config.ddc.funcs.write_dpcd(hdcp->config.ddc.handle,
DP_DEVICE_SERVICE_IRQ_VECTOR_ESI0, &clear_cp_irq_bit, size)
? MOD_HDCP_STATUS_SUCCESS : MOD_HDCP_STATUS_DDC_FAILURE;
else
return hdcp->config.ddc.funcs.write_dpcd(hdcp->config.ddc.handle,
DP_DEVICE_SERVICE_IRQ_VECTOR, &clear_cp_irq_bit, size)
? MOD_HDCP_STATUS_SUCCESS : MOD_HDCP_STATUS_DDC_FAILURE;
}
return MOD_HDCP_STATUS_INVALID_OPERATION;
}