diff options
| author | Jude Shih <shenshih@amd.com> | 2021-04-20 10:19:37 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-05-10 18:06:44 -0400 |
| commit | 81927e2808be5adace93c2012d45d6938d3a7aa0 (patch) | |
| tree | 95f90e9a665f319d77ff5700d82870673bb47949 /drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | |
| parent | 7f63d8a1ad37a481dba7e721c3510025bdb897d4 (diff) | |
| download | lwn-81927e2808be5adace93c2012d45d6938d3a7aa0.tar.gz lwn-81927e2808be5adace93c2012d45d6938d3a7aa0.zip | |
drm/amd/display: Support for DMUB AUX
[WHY]
To process AUX transactions with DMUB using inbox1 and outbox1 mail boxes.
[How]
1) Added inbox1 command DMUB_CMD__DP_AUX_ACCESS to issue AUX commands
to DMUB in dc_process_dmub_aux_transfer_async(). DMUB processes AUX cmd
with DCN and sends reply back in an outbox1 message triggering an
outbox1 interrupt to driver.
2) In existing driver implementation, AUX commands are processed
synchronously by configuring DCN reg. But in DMUB AUX, driver sends an
inbox1 message and waits for a conditional variable (CV) which will be
signaled by outbox1 ISR.
3) DM will retrieve Outbox1 message and send back reply to upper layer
and complete the AUX command
Signed-off-by: Jude Shih <shenshih@amd.com>
Reviewed-by: Hanghong Ma <Hanghong.Ma@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Wayne Lin <Wayne.Lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 193 |
1 files changed, 146 insertions, 47 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index e5efae695559..bdbc577be65c 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -35,6 +35,7 @@ #include "dc/inc/hw/abm.h" #include "dc/dc_dmub_srv.h" #include "dc/dc_edid_parser.h" +#include "dc/dc_stat.h" #include "amdgpu_dm_trace.h" #include "vid.h" @@ -59,6 +60,7 @@ #include "ivsrcid/ivsrcid_vislands30.h" +#include "i2caux_interface.h" #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/types.h> @@ -620,6 +622,58 @@ static void dm_dcn_vertical_interrupt0_high_irq(void *interrupt_params) #endif #endif +/** + * dm_dmub_outbox1_low_irq() - Handles Outbox interrupt + * @interrupt_params: used for determining the Outbox instance + * + * Handles the Outbox Interrupt + * event handler. + */ +#define DMUB_TRACE_MAX_READ 64 +static void dm_dmub_outbox1_low_irq(void *interrupt_params) +{ + struct dmub_notification notify; + struct common_irq_params *irq_params = interrupt_params; + struct amdgpu_device *adev = irq_params->adev; + struct amdgpu_display_manager *dm = &adev->dm; + struct dmcub_trace_buf_entry entry = { 0 }; + uint32_t count = 0; + + if (dc_enable_dmub_notifications(adev->dm.dc)) { + if (irq_params->irq_src == DC_IRQ_SOURCE_DMCUB_OUTBOX) { + do { + dc_stat_get_dmub_notification(adev->dm.dc, ¬ify); + } while (notify.pending_notification); + + if (adev->dm.dmub_notify) + memcpy(adev->dm.dmub_notify, ¬ify, sizeof(struct dmub_notification)); + if (notify.type == DMUB_NOTIFICATION_AUX_REPLY) + complete(&adev->dm.dmub_aux_transfer_done); + // TODO : HPD Implementation + + } else { + DRM_ERROR("DM: Failed to receive correct outbox IRQ !"); + } + } + + + do { + if (dc_dmub_srv_get_dmub_outbox0_msg(dm->dc, &entry)) { + trace_amdgpu_dmub_trace_high_irq(entry.trace_code, entry.tick_count, + entry.param0, entry.param1); + + DRM_DEBUG_DRIVER("trace_code:%u, tick_count:%u, param0:%u, param1:%u\n", + entry.trace_code, entry.tick_count, entry.param0, entry.param1); + } else + break; + + count++; + + } while (count <= DMUB_TRACE_MAX_READ); + + ASSERT(count <= DMUB_TRACE_MAX_READ); +} + static int dm_set_clockgating_state(void *handle, enum amd_clockgating_state state) { @@ -938,32 +992,6 @@ static int dm_dmub_hw_init(struct amdgpu_device *adev) } #if defined(CONFIG_DRM_AMD_DC_DCN) -#define DMUB_TRACE_MAX_READ 64 -static void dm_dmub_trace_high_irq(void *interrupt_params) -{ - struct common_irq_params *irq_params = interrupt_params; - struct amdgpu_device *adev = irq_params->adev; - struct amdgpu_display_manager *dm = &adev->dm; - struct dmcub_trace_buf_entry entry = { 0 }; - uint32_t count = 0; - - do { - if (dc_dmub_srv_get_dmub_outbox0_msg(dm->dc, &entry)) { - trace_amdgpu_dmub_trace_high_irq(entry.trace_code, entry.tick_count, - entry.param0, entry.param1); - - DRM_DEBUG_DRIVER("trace_code:%u, tick_count:%u, param0:%u, param1:%u\n", - entry.trace_code, entry.tick_count, entry.param0, entry.param1); - } else - break; - - count++; - - } while (count <= DMUB_TRACE_MAX_READ); - - ASSERT(count <= DMUB_TRACE_MAX_READ); -} - static void mmhub_read_system_context(struct amdgpu_device *adev, struct dc_phy_addr_space_config *pa_config) { uint64_t pt_base; @@ -1220,6 +1248,16 @@ static int amdgpu_dm_init(struct amdgpu_device *adev) #if defined(CONFIG_DRM_AMD_SECURE_DISPLAY) adev->dm.crc_rd_wrk = amdgpu_dm_crtc_secure_display_create_work(); #endif + if (dc_enable_dmub_notifications(adev->dm.dc)) { + init_completion(&adev->dm.dmub_aux_transfer_done); + adev->dm.dmub_notify = kzalloc(sizeof(struct dmub_notification), GFP_KERNEL); + if (!adev->dm.dmub_notify) { + DRM_INFO("amdgpu: fail to allocate adev->dm.dmub_notify"); + goto error; + } + amdgpu_dm_outbox_init(adev); + } + if (amdgpu_dm_initialize_drm_device(adev)) { DRM_ERROR( "amdgpu: failed to initialize sw for display support.\n"); @@ -1293,6 +1331,11 @@ static void amdgpu_dm_fini(struct amdgpu_device *adev) adev->dm.dc->ctx->dmub_srv = NULL; } + if (dc_enable_dmub_notifications(adev->dm.dc)) { + kfree(adev->dm.dmub_notify); + adev->dm.dmub_notify = NULL; + } + if (adev->dm.dmub_bo) amdgpu_bo_free_kernel(&adev->dm.dmub_bo, &adev->dm.dmub_bo_gpu_addr, @@ -3152,38 +3195,51 @@ static int dcn10_register_irq_handlers(struct amdgpu_device *adev) } - if (dc->ctx->dmub_srv) { - i = DCN_1_0__SRCID__DMCUB_OUTBOX_HIGH_PRIORITY_READY_INT; - r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_DCE, i, &adev->dmub_trace_irq); + /* HPD */ + r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_DCE, DCN_1_0__SRCID__DC_HPD1_INT, + &adev->hpd_irq); + if (r) { + DRM_ERROR("Failed to add hpd irq id!\n"); + return r; + } - if (r) { - DRM_ERROR("Failed to add dmub trace irq id!\n"); - return r; - } + register_hpd_handlers(adev); - int_params.int_context = INTERRUPT_HIGH_IRQ_CONTEXT; + return 0; +} +/* Register Outbox IRQ sources and initialize IRQ callbacks */ +static int register_outbox_irq_handlers(struct amdgpu_device *adev) +{ + struct dc *dc = adev->dm.dc; + struct common_irq_params *c_irq_params; + struct dc_interrupt_params int_params = {0}; + int r, i; + + int_params.requested_polarity = INTERRUPT_POLARITY_DEFAULT; + int_params.current_polarity = INTERRUPT_POLARITY_DEFAULT; + + r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_DCE, DCN_1_0__SRCID__DMCUB_OUTBOX_LOW_PRIORITY_READY_INT, + &adev->dmub_outbox_irq); + if (r) { + DRM_ERROR("Failed to add outbox irq id!\n"); + return r; + } + + if (dc->ctx->dmub_srv) { + i = DCN_1_0__SRCID__DMCUB_OUTBOX_LOW_PRIORITY_READY_INT; + int_params.int_context = INTERRUPT_LOW_IRQ_CONTEXT; int_params.irq_source = - dc_interrupt_to_irq_source(dc, i, 0); + dc_interrupt_to_irq_source(dc, i, 0); - c_irq_params = &adev->dm.dmub_trace_params[0]; + c_irq_params = &adev->dm.dmub_outbox_params[0]; c_irq_params->adev = adev; c_irq_params->irq_src = int_params.irq_source; amdgpu_dm_irq_register_interrupt(adev, &int_params, - dm_dmub_trace_high_irq, c_irq_params); - } - - /* HPD */ - r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_DCE, DCN_1_0__SRCID__DC_HPD1_INT, - &adev->hpd_irq); - if (r) { - DRM_ERROR("Failed to add hpd irq id!\n"); - return r; + dm_dmub_outbox1_low_irq, c_irq_params); } - register_hpd_handlers(adev); - return 0; } #endif @@ -3662,6 +3718,22 @@ static int amdgpu_dm_initialize_drm_device(struct amdgpu_device *adev) goto fail; } + /* Use Outbox interrupt */ + switch (adev->asic_type) { +#if defined(CONFIG_DRM_AMD_DC_DCN3_0) + case CHIP_SIENNA_CICHLID: + case CHIP_NAVY_FLOUNDER: +#endif + case CHIP_RENOIR: + if (register_outbox_irq_handlers(dm->adev)) { + DRM_ERROR("DM: Failed to initialize IRQ\n"); + goto fail; + } + break; + default: + DRM_DEBUG_KMS("Unsupported ASIC type for outbox: 0x%X\n", adev->asic_type); + } + /* loops over all connectors on the board */ for (i = 0; i < link_cnt; i++) { struct dc_link *link = NULL; @@ -10707,3 +10779,30 @@ uint32_t dm_read_reg_func(const struct dc_context *ctx, uint32_t address, return value; } + +int amdgpu_dm_process_dmub_aux_transfer_sync(struct dc_context *ctx, unsigned int linkIndex, + struct aux_payload *payload, enum aux_return_code_type *operation_result) +{ + struct amdgpu_device *adev = ctx->driver_context; + int ret = 0; + + dc_process_dmub_aux_transfer_async(ctx->dc, linkIndex, payload); + ret = wait_for_completion_interruptible_timeout(&adev->dm.dmub_aux_transfer_done, 10*HZ); + if (ret == 0) { + *operation_result = AUX_RET_ERROR_TIMEOUT; + return -1; + } + *operation_result = (enum aux_return_code_type)adev->dm.dmub_notify->result; + + if (adev->dm.dmub_notify->result == AUX_RET_SUCCESS) { + (*payload->reply) = adev->dm.dmub_notify->aux_reply.command; + + // For read case, Copy data to payload + if (!payload->write && adev->dm.dmub_notify->aux_reply.length && + (*payload->reply == AUX_TRANSACTION_REPLY_AUX_ACK)) + memcpy(payload->data, adev->dm.dmub_notify->aux_reply.data, + adev->dm.dmub_notify->aux_reply.length); + } + + return adev->dm.dmub_notify->aux_reply.length; +} |