General: I think 'wd' has to be replaced with 'wb' which mean writeback
> From: Suraj Kandpal <suraj.kandpal@xxxxxxxxx>
>
> Adding support for writeback transcoder to start capturing frames using
> interrupt mechanism
>
> Signed-off-by: Suraj Kandpal <suraj.kandpal@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/Makefile | 1 +
> drivers/gpu/drm/i915/display/intel_acpi.c | 1 +
> drivers/gpu/drm/i915/display/intel_crtc.c | 6 +
> .../drm/i915/display/intel_crtc_state_dump.c | 1 +
> drivers/gpu/drm/i915/display/intel_ddi.c | 6 +
> drivers/gpu/drm/i915/display/intel_display.c | 65 +-
> drivers/gpu/drm/i915/display/intel_display.h | 5 +
> .../drm/i915/display/intel_display_debugfs.c | 13 +-
> .../drm/i915/display/intel_display_types.h | 6 +
> drivers/gpu/drm/i915/display/intel_dpll.c | 6 +
> .../drm/i915/display/intel_modeset_setup.c | 103 ++-
> .../drm/i915/display/intel_modeset_verify.c | 17 +-
> drivers/gpu/drm/i915/display/intel_opregion.c | 3 +
> .../gpu/drm/i915/display/intel_wb_connector.h | 20 +
> drivers/gpu/drm/i915/display/intel_wd.c | 699 ++++++++++++++++++
> drivers/gpu/drm/i915/display/intel_wd.h | 48 ++
> drivers/gpu/drm/i915/i915_drv.h | 1 +
> drivers/gpu/drm/i915/i915_irq.c | 8 +-
> drivers/gpu/drm/i915/i915_pci.c | 7 +-
> 19 files changed, 970 insertions(+), 46 deletions(-) create mode 100644
> drivers/gpu/drm/i915/display/intel_wb_connector.h
> create mode 100644 drivers/gpu/drm/i915/display/intel_wd.c
> create mode 100644 drivers/gpu/drm/i915/display/intel_wd.h
>
> diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
> index 522ef9b4aff3..ec63ed16c250 100644
> --- a/drivers/gpu/drm/i915/Makefile
> +++ b/drivers/gpu/drm/i915/Makefile
> @@ -302,6 +302,7 @@ i915-y += \
> display/intel_tv.o \
> display/intel_vdsc.o \
> display/intel_vrr.o \
> + display/intel_wd.o \
> display/vlv_dsi.o \
> display/vlv_dsi_pll.o
>
> diff --git a/drivers/gpu/drm/i915/display/intel_acpi.c
> b/drivers/gpu/drm/i915/display/intel_acpi.c
> index e78430001f07..ae08db164f73 100644
> --- a/drivers/gpu/drm/i915/display/intel_acpi.c
> +++ b/drivers/gpu/drm/i915/display/intel_acpi.c
> @@ -247,6 +247,7 @@ static u32 acpi_display_type(struct intel_connector
> *connector)
> case DRM_MODE_CONNECTOR_LVDS:
> case DRM_MODE_CONNECTOR_eDP:
> case DRM_MODE_CONNECTOR_DSI:
> + case DRM_MODE_CONNECTOR_WRITEBACK:
> display_type = ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL;
> break;
> case DRM_MODE_CONNECTOR_Unknown:
> diff --git a/drivers/gpu/drm/i915/display/intel_crtc.c
> b/drivers/gpu/drm/i915/display/intel_crtc.c
> index 6792a9056f46..66d552758720 100644
> --- a/drivers/gpu/drm/i915/display/intel_crtc.c
> +++ b/drivers/gpu/drm/i915/display/intel_crtc.c
> @@ -491,6 +491,9 @@ void intel_pipe_update_start(struct intel_crtc_state
> *new_crtc_state)
> if (new_crtc_state->do_async_flip)
> return;
>
> + if (new_crtc_state->output_types & BIT(INTEL_OUTPUT_WD))
> + return;
> +
> if (intel_crtc_needs_vblank_work(new_crtc_state))
> intel_crtc_vblank_work_init(new_crtc_state);
>
> @@ -638,6 +641,9 @@ void intel_pipe_update_end(struct intel_crtc_state
> *new_crtc_state)
> if (new_crtc_state->do_async_flip)
> return;
>
> + if (new_crtc_state->output_types & BIT(INTEL_OUTPUT_WD))
> + return;
> +
> trace_intel_pipe_update_end(crtc, end_vbl_count, scanline_end);
>
> /*
> diff --git a/drivers/gpu/drm/i915/display/intel_crtc_state_dump.c
> b/drivers/gpu/drm/i915/display/intel_crtc_state_dump.c
> index e9212f69c360..8435065f3b7d 100644
> --- a/drivers/gpu/drm/i915/display/intel_crtc_state_dump.c
> +++ b/drivers/gpu/drm/i915/display/intel_crtc_state_dump.c
> @@ -71,6 +71,7 @@ static const char * const output_type_str[] = {
> OUTPUT_TYPE(DSI),
> OUTPUT_TYPE(DDI),
> OUTPUT_TYPE(DP_MST),
> + OUTPUT_TYPE(WD),
> };
>
> #undef OUTPUT_TYPE
> diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c
> b/drivers/gpu/drm/i915/display/intel_ddi.c
> index a4c8493f3ce7..1360406ca531 100644
> --- a/drivers/gpu/drm/i915/display/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/display/intel_ddi.c
> @@ -1974,6 +1974,12 @@ void
> intel_ddi_sanitize_encoder_pll_mapping(struct intel_encoder *encoder)
> */
> if (encoder->type == INTEL_OUTPUT_DP_MST)
> return;
> + /*
> + * WD transcoder is a virtual encoder hence sanization
> + * is not required for it
> + */
WD transcoder doesn’t have any encoder, hence assigning a virtual encoder.
> + if (encoder->type == INTEL_OUTPUT_WD)
> + return;
>
> if (!encoder->base.crtc && intel_encoder_is_dp(encoder)) {
> u8 pipe_mask;
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> b/drivers/gpu/drm/i915/display/intel_display.c
> index f143adefdf38..52fb23846856 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -115,6 +115,7 @@
> #include "intel_sprite.h"
> #include "intel_tc.h"
> #include "intel_vga.h"
> +#include "intel_wd.h"
> #include "i9xx_plane.h"
> #include "skl_scaler.h"
> #include "skl_universal_plane.h"
> @@ -1510,6 +1511,9 @@ static void intel_encoders_update_prepare(struct
> intel_atomic_state *state)
> continue;
>
> intel_connector = to_intel_connector(connector);
Can you add a comment here saying for WD intel_connector is not created!
> + if (!intel_connector)
> + continue;
> +
> encoder =
> intel_connector_primary_encoder(intel_connector);
> if (!encoder->update_prepare)
> continue;
> @@ -1539,6 +1543,9 @@ static void intel_encoders_update_complete(struct
> intel_atomic_state *state)
> continue;
>
> intel_connector = to_intel_connector(connector);
Same here a comment!
> + if (!intel_connector)
> + continue;
> +
> encoder =
> intel_connector_primary_encoder(intel_connector);
> if (!encoder->update_complete)
> continue;
> @@ -1549,6 +1556,39 @@ static void
> intel_encoders_update_complete(struct intel_atomic_state *state)
> }
> }
>
> +static void intel_queue_writeback_job(struct intel_atomic_state *state,
> + struct intel_crtc *intel_crtc, struct intel_crtc_state *crtc_state)
Can this intel_crtc_state be eliminated, anyway later it the function it can be obtained from intel_atomic_state!
Moreover crtc_state and intel_crtc is not being used at all.
> {
> + struct drm_connector_state *new_conn_state;
> + struct drm_connector *connector;
> + struct drm_writeback_connector *wb_conn;
> + int i;
> +
> + for_each_new_connector_in_state(&state->base, connector,
> new_conn_state,
> + i) {
> + if (!new_conn_state->writeback_job)
> + continue;
> +
> + wb_conn = drm_connector_to_writeback(connector);
> + drm_writeback_queue_job(wb_conn, new_conn_state);
> + }
> +}
> +
> +static void intel_enable_writeback_capture(struct intel_atomic_state *state,
> + struct intel_crtc *intel_crtc, struct intel_crtc_state *crtc_state)
Same here, can crtc_state can be eliminated and later obtain it from intel_atomic_state.
Intel_crtc is not being used.
> {
> + struct drm_connector_state *new_conn_state;
> + struct drm_connector *connector;
> + int i;
> +
> + for_each_new_connector_in_state(&state->base, connector,
> new_conn_state,
> + i) {
> + if (connector->connector_type !=
> DRM_MODE_CONNECTOR_WRITEBACK)
> + continue;
> + intel_wd_enable_capture(crtc_state, new_conn_state);
> + }
> +}
> +
> static void intel_encoders_pre_pll_enable(struct intel_atomic_state *state,
> struct intel_crtc *crtc)
> {
> @@ -1649,8 +1689,12 @@ static void intel_encoders_post_disable(struct
> intel_atomic_state *state,
> int i;
>
> for_each_old_connector_in_state(&state->base, conn,
> old_conn_state, i) {
> - struct intel_encoder *encoder =
> - to_intel_encoder(old_conn_state->best_encoder);
> + struct intel_encoder *encoder;
> +
> + if (conn->connector_type ==
> DRM_MODE_CONNECTOR_WRITEBACK)
> + continue;
> +
> + encoder = to_intel_encoder(old_conn_state->best_encoder);
>
> if (old_conn_state->crtc != &crtc->base)
> continue;
> @@ -1927,7 +1971,8 @@ static void hsw_crtc_enable(struct
> intel_atomic_state *state,
> bdw_set_pipemisc(new_crtc_state);
>
> if (!intel_crtc_is_bigjoiner_slave(new_crtc_state) &&
> - !transcoder_is_dsi(cpu_transcoder))
> + !transcoder_is_dsi(cpu_transcoder) &&
> + !transcoder_is_wd(cpu_transcoder))
> hsw_configure_cpu_transcoder(new_crtc_state);
>
> crtc->active = true;
> @@ -7575,6 +7620,12 @@ static void intel_atomic_commit_tail(struct
> intel_atomic_state *state)
> }
> }
>
> + for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) {
> + if (!(new_crtc_state->output_types &
> BIT(INTEL_OUTPUT_WD)))
> + continue;
> + intel_wd_set_vblank_event(state, crtc, new_crtc_state);
For compiler optimization purpose can this be changed to
if ((new_crtc_state->output_types & BIT(INTEL_OUTPUT_WD)))
intel_wd_set_vblank_event(state, crtc, new_crtc_state);
> + }
> +
> intel_encoders_update_prepare(state);
>
> intel_dbuf_pre_plane_update(state);
> @@ -7585,6 +7636,13 @@ static void intel_atomic_commit_tail(struct
> intel_atomic_state *state)
> intel_crtc_enable_flip_done(state, crtc);
> }
>
> + for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) {
> + if (!(new_crtc_state->output_types &
> BIT(INTEL_OUTPUT_WD)))
> + continue;
> + intel_queue_writeback_job(state, crtc, new_crtc_state);
> + intel_enable_writeback_capture(state, crtc, new_crtc_state);
> + }
Same here, since we are focusing on WD over here, so lets have a check for WD and avoid continue.
Other way would be to add kernel optimization unlikely for the if condition.
> +
> /* Now enable the clocks, plane, pipe, and connectors that we set
> up. */
> dev_priv->display->commit_modeset_enables(state);
>
> @@ -7965,6 +8023,7 @@ static void intel_setup_outputs(struct
> drm_i915_private *dev_priv)
> intel_ddi_init(dev_priv, PORT_TC1);
> intel_ddi_init(dev_priv, PORT_TC2);
> } else if (DISPLAY_VER(dev_priv) >= 12) {
> + intel_wd_init(dev_priv, TRANSCODER_WD_0);
Can this be moved outside of the if else condition. Since this is whole lot does the port initialization and the newly added does the WD transcoder initialization.
> intel_ddi_init(dev_priv, PORT_A);
> intel_ddi_init(dev_priv, PORT_B);
> intel_ddi_init(dev_priv, PORT_TC1);
> diff --git a/drivers/gpu/drm/i915/display/intel_display.h
> b/drivers/gpu/drm/i915/display/intel_display.h
> index 3b9987b5f304..4879ca2e96f7 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.h
> +++ b/drivers/gpu/drm/i915/display/intel_display.h
> @@ -158,6 +158,11 @@ static inline bool transcoder_is_dsi(enum
> transcoder transcoder)
> return transcoder == TRANSCODER_DSI_A || transcoder ==
> TRANSCODER_DSI_C; }
>
> +static inline bool transcoder_is_wd(enum transcoder transcoder) {
> + return transcoder == TRANSCODER_WD_0 || transcoder ==
> TRANSCODER_WD_1;
> +}
> +
> /*
> * Global legacy plane identifier. Valid only for primary/sprite
> * planes on pre-g4x, and only for primary planes on g4x-bdw.
> diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> index 225b6bfc783c..0dad54058762 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> @@ -547,7 +547,7 @@ static void intel_hdmi_info(struct seq_file *m, static
> void intel_connector_info(struct seq_file *m,
> struct drm_connector *connector)
> {
> - struct intel_connector *intel_connector =
> to_intel_connector(connector);
> + struct intel_connector *intel_connector;
> const struct drm_connector_state *conn_state = connector->state;
> struct intel_encoder *encoder =
> to_intel_encoder(conn_state->best_encoder);
> @@ -570,6 +570,8 @@ static void intel_connector_info(struct seq_file *m,
> if (!encoder)
> return;
>
> + intel_connector = to_intel_connector(connector);
> +
> switch (connector->connector_type) {
> case DRM_MODE_CONNECTOR_DisplayPort:
> case DRM_MODE_CONNECTOR_eDP:
> @@ -587,12 +589,15 @@ static void intel_connector_info(struct seq_file *m,
> break;
> }
>
> - seq_puts(m, "\tHDCP version: ");
> - intel_hdcp_info(m, intel_connector);
> + if (intel_connector) {
> + seq_puts(m, "\tHDCP version: ");
> + intel_hdcp_info(m, intel_connector);
> + }
>
> seq_printf(m, "\tmax bpc: %u\n", connector->display_info.bpc);
>
> - intel_panel_info(m, intel_connector);
> + if (intel_connector)
> + intel_panel_info(m, intel_connector);
>
> seq_printf(m, "\tmodes:\n");
> list_for_each_entry(mode, &connector->modes, head) diff --git
> a/drivers/gpu/drm/i915/display/intel_display_types.h
> b/drivers/gpu/drm/i915/display/intel_display_types.h
> index 7a82b7acbaf2..7b550c532dfb 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> @@ -44,6 +44,7 @@
> #include <drm/drm_vblank.h>
> #include <drm/drm_vblank_work.h>
> #include <drm/i915_mei_hdcp_interface.h>
> +#include <drm/drm_writeback.h>
> #include <media/cec-notifier.h>
>
> #include "i915_vma.h"
> @@ -1370,6 +1371,11 @@ struct intel_crtc {
> bool cpu_fifo_underrun_disabled;
> bool pch_fifo_underrun_disabled;
>
> + struct {
> + struct drm_pending_vblank_event *e;
> + atomic_t work_busy;
> + wait_queue_head_t wd_wait;
> + } wd;
> /* per-pipe watermark state */
> struct {
> /* watermarks currently being used */ diff --git
> a/drivers/gpu/drm/i915/display/intel_dpll.c
> b/drivers/gpu/drm/i915/display/intel_dpll.c
> index 5262f16b45ac..82bb8e170197 100644
> --- a/drivers/gpu/drm/i915/display/intel_dpll.c
> +++ b/drivers/gpu/drm/i915/display/intel_dpll.c
> @@ -939,6 +939,9 @@ static int hsw_crtc_compute_clock(struct
> intel_atomic_state *state,
> struct intel_encoder *encoder =
> intel_get_crtc_new_encoder(state, crtc_state);
>
> + if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_WD))
> + return 0;
> +
> if (DISPLAY_VER(dev_priv) < 11 &&
> intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DSI))
> return 0;
> @@ -955,6 +958,9 @@ static int hsw_crtc_get_shared_dpll(struct
> intel_atomic_state *state,
> struct intel_encoder *encoder =
> intel_get_crtc_new_encoder(state, crtc_state);
>
> + if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_WD))
> + return 0;
> +
> if (DISPLAY_VER(dev_priv) < 11 &&
> intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DSI))
> return 0;
> diff --git a/drivers/gpu/drm/i915/display/intel_modeset_setup.c
> b/drivers/gpu/drm/i915/display/intel_modeset_setup.c
> index 985dfa5f7aa1..0e48c1a31024 100644
> --- a/drivers/gpu/drm/i915/display/intel_modeset_setup.c
> +++ b/drivers/gpu/drm/i915/display/intel_modeset_setup.c
> @@ -23,6 +23,7 @@
> #include "intel_modeset_setup.h"
> #include "intel_pch_display.h"
> #include "intel_pm.h"
> +#include "intel_wd.h"
>
> static void intel_crtc_disable_noatomic(struct intel_crtc *crtc,
> struct drm_modeset_acquire_ctx
> *ctx) @@ -110,17 +111,17 @@ static void intel_crtc_disable_noatomic(struct
> intel_crtc *crtc,
>
> static void intel_modeset_update_connector_atomic_state(struct
> drm_i915_private *i915) {
> - struct intel_connector *connector;
> + struct drm_connector *connector;
> struct drm_connector_list_iter conn_iter;
>
> drm_connector_list_iter_begin(&i915->drm, &conn_iter);
> - for_each_intel_connector_iter(connector, &conn_iter) {
> - struct drm_connector_state *conn_state = connector-
> >base.state;
> + drm_for_each_connector_iter(connector, &conn_iter) {
> + struct drm_connector_state *conn_state = connector->state;
> struct intel_encoder *encoder =
> - to_intel_encoder(connector->base.encoder);
> + to_intel_encoder(connector->encoder);
>
> if (conn_state->crtc)
> - drm_connector_put(&connector->base);
> + drm_connector_put(connector);
>
> if (encoder) {
> struct intel_crtc *crtc =
> @@ -132,7 +133,7 @@ static void
> intel_modeset_update_connector_atomic_state(struct drm_i915_private
> conn_state->crtc = &crtc->base;
> conn_state->max_bpc = (crtc_state->pipe_bpp ?: 24)
> / 3;
>
> - drm_connector_get(&connector->base);
> + drm_connector_get(connector);
> } else {
> conn_state->best_encoder = NULL;
> conn_state->crtc = NULL;
> @@ -432,6 +433,8 @@ static void intel_modeset_readout_hw_state(struct
> drm_i915_private *i915)
> struct intel_crtc *crtc;
> struct intel_encoder *encoder;
> struct intel_connector *connector;
> + struct drm_connector *_connector;
> + struct drm_encoder *_encoder;
> struct drm_connector_list_iter conn_iter;
> u8 active_pipes = 0;
>
> @@ -508,38 +511,70 @@ static void
> intel_modeset_readout_hw_state(struct drm_i915_private *i915)
> intel_dpll_readout_hw_state(i915);
>
> drm_connector_list_iter_begin(&i915->drm, &conn_iter);
> - for_each_intel_connector_iter(connector, &conn_iter) {
> - if (connector->get_hw_state(connector)) {
> - struct intel_crtc_state *crtc_state;
> - struct intel_crtc *crtc;
> -
> - connector->base.dpms = DRM_MODE_DPMS_ON;
> -
> - encoder = intel_attached_encoder(connector);
> - connector->base.encoder = &encoder->base;
> -
> - crtc = to_intel_crtc(encoder->base.crtc);
> - crtc_state = crtc ? to_intel_crtc_state(crtc-
> >base.state) : NULL;
> -
> - if (crtc_state && crtc_state->hw.active) {
> - /*
> - * This has to be done during hardware
> readout
> - * because anything calling .crtc_disable may
> - * rely on the connector_mask being
> accurate.
> - */
> - crtc_state->uapi.connector_mask |=
> - drm_connector_mask(&connector-
> >base);
> - crtc_state->uapi.encoder_mask |=
> - drm_encoder_mask(&encoder-
> >base);
> + drm_for_each_connector_iter(_connector, &conn_iter) {
> + struct intel_crtc_state *crtc_state;
> + struct intel_crtc *crtc;
> + struct drm_writeback_connector *wb_conn;
> + struct intel_wd *intel_wd;
> +
> + connector = to_intel_connector(_connector);
> + if (!connector) {
> + wb_conn =
> drm_connector_to_writeback(_connector);
> + intel_wd = wb_conn_to_intel_wd(wb_conn);
> + _encoder = &intel_wd->base.base;
> + _connector->encoder = _encoder;
> + encoder = to_intel_encoder(_encoder);
> + pipe = 0;
> + if (encoder->get_hw_state(encoder, &pipe)) {
> + _connector->dpms =
> DRM_MODE_DPMS_ON;
> + crtc = to_intel_crtc(_encoder->crtc);
> + crtc_state = crtc ? to_intel_crtc_state(crtc-
> >base.state) : NULL;
> +
> + if (crtc_state && crtc_state->hw.active) {
> + /*
> + * This has to be done during
> hardware readout
> + * because anything calling
> .crtc_disable may
> + * rely on the connector_mask being
> accurate.
> + */
> + crtc_state->uapi.connector_mask |=
> +
> drm_connector_mask(&connector->base);
> + crtc_state->uapi.encoder_mask |=
> +
> drm_encoder_mask(&encoder->base);
> + }
> + } else {
> + _connector->dpms =
> DRM_MODE_DPMS_OFF;
> + _connector->encoder = NULL;
> }
> } else {
> - connector->base.dpms = DRM_MODE_DPMS_OFF;
> - connector->base.encoder = NULL;
> + if (connector->get_hw_state(connector)) {
> + connector->base.dpms =
> DRM_MODE_DPMS_OFF;
> + encoder =
> intel_attached_encoder(connector);
> + connector->base.encoder = &encoder->base;
> +
> + crtc = to_intel_crtc(encoder->base.crtc);
> + crtc_state = crtc ? to_intel_crtc_state(crtc-
> >base.state) : NULL;
> +
> + if (crtc_state && crtc_state->hw.active) {
> + /*
> + * This has to be done during
> hardware readout
> + * because anything calling
> .crtc_disable may
> + * rely on the connector_mask being
> accurate.
> + */
> + crtc_state->uapi.connector_mask |=
> +
> drm_connector_mask(&connector->base);
> + crtc_state->uapi.encoder_mask |=
> +
> drm_encoder_mask(&encoder->base);
> + }
> + } else {
> + connector->base.dpms =
> DRM_MODE_DPMS_OFF;
> + connector->base.encoder = NULL;
> + }
> }
> drm_dbg_kms(&i915->drm,
> - "[CONNECTOR:%d:%s] hw state readout: %s\n",
> - connector->base.base.id, connector->base.name,
> - str_enabled_disabled(connector->base.encoder));
> + "[CONNECTOR:%d:%s] hw state readout:
> %s\n",
> + _connector->base.id, _connector->name,
> + str_enabled_disabled(_connector-
> >encoder));
> +
It becomes too huge, with if else for WD.
Can we retain the existing as is for non-WD and add a new for loop to find out WD and readout hw state separately for WD.
> }
> drm_connector_list_iter_end(&conn_iter);
>
> diff --git a/drivers/gpu/drm/i915/display/intel_modeset_verify.c
> b/drivers/gpu/drm/i915/display/intel_modeset_verify.c
> index a91586d77cb6..0e06daac74c1 100644
> --- a/drivers/gpu/drm/i915/display/intel_modeset_verify.c
> +++ b/drivers/gpu/drm/i915/display/intel_modeset_verify.c
> @@ -25,11 +25,16 @@
> static void intel_connector_verify_state(struct intel_crtc_state *crtc_state,
> struct drm_connector_state
> *conn_state) {
> - struct intel_connector *connector = to_intel_connector(conn_state-
> >connector);
> - struct drm_i915_private *i915 = to_i915(connector->base.dev);
> + struct drm_connector *_connector = conn_state->connector;
> + struct intel_connector *connector;
> + struct drm_i915_private *i915 = to_i915(_connector->dev);
>
> drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s]\n",
> - connector->base.base.id, connector->base.name);
> + _connector->base.id, _connector->name);
> +
> + connector = to_intel_connector(_connector);
> + if (!connector)
> + return;
>
> if (connector->get_hw_state(connector)) {
> struct intel_encoder *encoder =
> intel_attached_encoder(connector);
> @@ -119,6 +124,9 @@ verify_encoder_state(struct drm_i915_private
> *dev_priv, struct intel_atomic_stat
> encoder->base.base.id,
> encoder->base.name);
>
> + if (encoder->type == INTEL_OUTPUT_WD)
> + continue;
> +
> for_each_oldnew_connector_in_state(&state->base,
> connector, old_conn_state,
> new_conn_state, i) {
> if (old_conn_state->best_encoder == &encoder-
> >base) @@ -177,6 +185,9 @@ verify_crtc_state(struct intel_crtc *crtc,
>
> intel_crtc_get_pipe_config(pipe_config);
>
> + if (new_crtc_state->output_types & BIT(INTEL_OUTPUT_WD))
> + return;
> +
> /* we keep both pipes enabled on 830 */
> if (IS_I830(dev_priv) && pipe_config->hw.active)
> pipe_config->hw.active = new_crtc_state->hw.active; diff --git
> a/drivers/gpu/drm/i915/display/intel_opregion.c
> b/drivers/gpu/drm/i915/display/intel_opregion.c
> index 1c0c745c142d..73a5a12e2c48 100644
> --- a/drivers/gpu/drm/i915/display/intel_opregion.c
> +++ b/drivers/gpu/drm/i915/display/intel_opregion.c
> @@ -374,6 +374,9 @@ int intel_opregion_notify_encoder(struct
> intel_encoder *intel_encoder,
> if (ret)
> return ret;
>
> + if (intel_encoder->type == INTEL_OUTPUT_WD)
> + return 0;
> +
> if (intel_encoder->type == INTEL_OUTPUT_DSI)
> port = 0;
> else
> diff --git a/drivers/gpu/drm/i915/display/intel_wb_connector.h
> b/drivers/gpu/drm/i915/display/intel_wb_connector.h
> new file mode 100644
> index 000000000000..39dceddc7b4d
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/display/intel_wb_connector.h
Should this be intel_wb.h?
> @@ -0,0 +1,20 @@
> +/* SPDX-License-Identifier: MIT*/
> +/*
> + * Copyright © 2022 Intel Corporation
> + */
> +
> +#ifndef __INTEL_WB_CONNECTOR_H__
> +#define __INTEL_WB_CONNECTOR_H__
> +
> +#include "intel_display.h"
> +
> +struct intel_wb_connector *intel_wb_connector_alloc(void); void
> +intel_wb_connector_free(struct intel_wb_connector *connector); void
> +intel_wb_connector_destroy(struct drm_connector *connector); bool
> +intel_wb_connector_get_hw_state(struct intel_wb_connector *connector);
> +enum pipe intel_wb_connector_get_pipe(struct intel_wb_connector
> +*connector); void intel_wb_connector_attach_encoder(struct
> intel_wb_connector *connector,
> + struct intel_encoder *encoder);
> +
> +#endif /* __INTEL_WB_CONNECTOR_H__ */
> +
> diff --git a/drivers/gpu/drm/i915/display/intel_wd.c
> b/drivers/gpu/drm/i915/display/intel_wd.c
> new file mode 100644
> index 000000000000..a30cf1055db4
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/display/intel_wd.c
> @@ -0,0 +1,699 @@
> +// SPDX-License-Identifier: MIT
> +/*
> + * Copyright © 2022 Intel Corporation
> + */
> +
> +#include <drm/drm_atomic_helper.h>
> +#include <drm/drm_fourcc.h>
> +
> +#include "intel_atomic.h"
> +#include "intel_connector.h"
> +#include "intel_wd.h"
> +#include "intel_fb_pin.h"
> +#include "intel_de.h"
> +
> +enum {
> + WD_CAPTURE_4_PIX,
> + WD_CAPTURE_2_PIX,
> +} wd_capture_format;
> +
> +struct drm_writeback_job
> +*intel_get_writeback_job_from_queue(struct intel_wd *intel_wd) {
> + struct drm_writeback_job *job;
> + struct drm_i915_private *i915 = to_i915(intel_wd->base.base.dev);
> + struct drm_writeback_connector *wb_conn =
> + &intel_wd->wb_conn;
> + unsigned long flags;
> +
> + spin_lock_irqsave(&wb_conn->job_lock, flags);
> + job = list_first_entry_or_null(&wb_conn->job_queue,
> + struct drm_writeback_job,
> + list_entry);
> + spin_unlock_irqrestore(&wb_conn->job_lock, flags);
> + if (job == NULL) {
> + drm_dbg_kms(&i915->drm, "job queue is empty\n");
> + return NULL;
> + }
> +
> + return job;
> +}
> +
> +/*Check with Spec*/
Remove this and if you need to double check add a TODO:
> +static const u32 wb_fmts[] = {
> + DRM_FORMAT_YUV444,
> + DRM_FORMAT_XYUV8888,
> + DRM_FORMAT_XBGR8888,
> + DRM_FORMAT_XRGB8888,
> + DRM_FORMAT_Y410,
> + DRM_FORMAT_YUV422,
> + DRM_FORMAT_XBGR2101010,
> + DRM_FORMAT_RGB565,
> +};
> +
> +static int intel_wd_get_format(int pixel_format) {
> + int wd_format = -EINVAL;
> +
> + switch (pixel_format) {
> + case DRM_FORMAT_XBGR8888:
> + case DRM_FORMAT_XRGB8888:
> + case DRM_FORMAT_XBGR2101010:
> + case DRM_FORMAT_XYUV8888:
> + case DRM_FORMAT_YUV444:
> + wd_format = WD_CAPTURE_4_PIX;
> + break;
> + case DRM_FORMAT_YUV422:
> + case DRM_FORMAT_RGB565:
> + wd_format = WD_CAPTURE_2_PIX;
> + break;
> + default:
> + DRM_ERROR("unsupported pixel format %x!\n",
> + pixel_format);
> + }
> +
> + return wd_format;
> +}
> +
> +static int intel_wd_verify_pix_format(int format) {
> + const struct drm_format_info *info = drm_format_info(format);
> + int pix_format = info->format;
> + int i = 0;
> +
> + for (i = 0; i < ARRAY_SIZE(wb_fmts); i++)
> + if (pix_format == wb_fmts[i])
> + return 0;
> +
> + return 1;
return TRUE;
> +}
> +
> +static u32 intel_wd_get_stride(const struct intel_crtc_state *crtc_state,
> + int format)
> +{
> + const struct drm_format_info *info = drm_format_info(format);
> + int wd_format;
> + int hactive, pixel_size;
> +
> + wd_format = intel_wd_get_format(info->format);
> +
> + switch (wd_format) {
> + case WD_CAPTURE_4_PIX:
> + pixel_size = 4;
> + break;
> + case WD_CAPTURE_2_PIX:
> + pixel_size = 2;
> + break;
> + default:
> + pixel_size = 1;
> + break;
> + }
> +
> + hactive = crtc_state->hw.adjusted_mode.crtc_hdisplay;
> +
> + return DIV_ROUND_UP(hactive * pixel_size, 64); }
> +
> +static int intel_wd_pin_fb(struct intel_wd *intel_wd,
> + struct drm_framebuffer *fb)
> +{
> + const struct i915_ggtt_view view = {
> + .type = I915_GGTT_VIEW_NORMAL,
> + };
> + struct i915_vma *vma;
> +
> + vma = intel_pin_and_fence_fb_obj(fb, false, &view, false,
> + &intel_wd->flags);
> +
> + if (IS_ERR(vma))
> + return PTR_ERR(vma);
> +
> + intel_wd->vma = vma;
> + return 0;
> +}
> +
> +static void intel_configure_slicing_strategy(struct drm_i915_private
> *dev_priv,
> + struct intel_wd *intel_wd, u32 *tmp)
Change dev_priv to i915
> +{
> + *tmp &= ~WD_STRAT_MASK;
> + if (intel_wd->slicing_strategy == 1)
> + *tmp |= WD_SLICING_STRAT_1_1;
> + else if (intel_wd->slicing_strategy == 2)
> + *tmp |= WD_SLICING_STRAT_2_1;
> + else if (intel_wd->slicing_strategy == 3)
> + *tmp |= WD_SLICING_STRAT_4_1;
> + else if (intel_wd->slicing_strategy == 4)
> + *tmp |= WD_SLICING_STRAT_8_1;
> +
> + intel_de_write(dev_priv, WD_STREAMCAP_CTL(intel_wd->trans),
> + *tmp);
> +}
> +
> +static enum drm_mode_status
> +intel_wd_mode_valid(struct drm_connector *connector,
> + struct drm_display_mode *mode)
> +{
> + drm_dbg_kms(connector->dev, ":");
> + return MODE_OK;
> +}
Are you planning to add any logic over here? If so add a TODO/FIXME.
If not then remove this.
> +
> +static int intel_wd_get_modes(struct drm_connector *connector) {
> + return 0;
> +}
Same as above.
> +
> +static void intel_wd_get_config(struct intel_encoder *encoder,
> + struct intel_crtc_state *pipe_config) {
> + struct intel_crtc *intel_crtc =
> + to_intel_crtc(pipe_config->uapi.crtc);
> +
> + if (intel_crtc) {
> + memcpy(pipe_config, intel_crtc->config,
> + sizeof(*pipe_config));
> + pipe_config->output_types |= BIT(INTEL_OUTPUT_WD);
> + }
> +}
> +
> +static int intel_wd_compute_config(struct intel_encoder *encoder,
> + struct intel_crtc_state *pipe_config,
> + struct drm_connector_state *conn_state) {
> + struct intel_wd *intel_wd = enc_to_intel_wd(encoder);
> + struct drm_writeback_job *job;
> +
> + job = intel_get_writeback_job_from_queue(intel_wd);
> + if (job || conn_state->writeback_job) {
> + intel_wd->wd_crtc = to_intel_crtc(pipe_config->uapi.crtc);
> + return 0;
> + }
> +
> + return 0;
> +}
Just assigning pipe/crtc to wd. Can this be commented?
> +
> +static void intel_wd_get_power_domains(struct intel_encoder *encoder,
> + struct intel_crtc_state *crtc_state) {
> + struct drm_i915_private *i915 = to_i915(encoder->base.dev);
> + struct intel_wd *intel_wd = enc_to_intel_wd(encoder);
> + intel_wakeref_t wakeref;
> +
> + wakeref = intel_display_power_get(i915,
> + encoder->power_domain);
> +
> + intel_wd->io_wakeref[0] = wakeref;
> +}
> +
> +static bool intel_wd_get_hw_state(struct intel_encoder *encoder,
> + enum pipe *pipe)
> +{
> + bool ret = false;
> + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
> + struct intel_wd *intel_wd = enc_to_intel_wd(encoder);
> + struct intel_crtc *wd_crtc = intel_wd->wd_crtc;
> + intel_wakeref_t wakeref;
> + u32 tmp;
> +
> + if (wd_crtc)
> + return false;
> +
> + wakeref = intel_display_power_get_if_enabled(dev_priv,
> + encoder->power_domain);
> +
> + if (!wakeref)
> + goto out;
> +
> + tmp = intel_de_read(dev_priv, PIPECONF(intel_wd->trans));
> + ret = tmp & WD_TRANS_ACTIVE;
> + if (ret) {
> + *pipe = wd_crtc->pipe;
> + return true;
> + }
> +
> +out:
> + intel_display_power_put(dev_priv, encoder->power_domain,
> wakeref);
> + return false;
> +}
> +
> +static int intel_wd_encoder_atomic_check(struct drm_encoder *encoder,
> + struct drm_crtc_state *crtc_st,
> + struct drm_connector_state *conn_st) {
> + /* Check for the format and buffers and property validity */
> + struct drm_framebuffer *fb;
> + struct drm_writeback_job *job = conn_st->writeback_job;
> + struct drm_i915_private *i915 = to_i915(encoder->dev);
> + const struct drm_display_mode *mode = &crtc_st->mode;
> + int ret;
> +
> + if (!job) {
> + drm_dbg_kms(&i915->drm, "No writeback job created
> returning\n");
> + return -EINVAL;
> + }
> +
> + fb = job->fb;
> + if (!fb) {
> + drm_dbg_kms(&i915->drm, "Invalid framebuffer\n");
> + return -EINVAL;
> + }
> +
> + if (fb->width != mode->hdisplay || fb->height != mode->vdisplay) {
> + drm_dbg_kms(&i915->drm, "Invalid framebuffer size
> %ux%u\n",
> + fb->width, fb->height);
> + return -EINVAL;
> + }
> +
> + ret = intel_wd_verify_pix_format(fb->format->format);
> + if (ret) {
> + drm_dbg_kms(&i915->drm, "Unsupported framebuffer
> format %08x\n",
> + fb->format->format);
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +
> +static const struct drm_encoder_helper_funcs wd_encoder_helper_funcs =
> {
> + .atomic_check = intel_wd_encoder_atomic_check, };
> +
> +static void intel_wd_connector_destroy(struct drm_connector *connector)
> +{
Do you want to flush your queue before removing connector!
> + drm_connector_cleanup(connector);
> + kfree(connector);
> +}
> +
> +static enum drm_connector_status
> +intel_wb_connector_detect(struct drm_connector *connector, bool force)
> +{
> + return connector_status_connected;
> +}
> +
> +static const struct drm_connector_funcs wd_connector_funcs = {
> + .detect = intel_wb_connector_detect,
> + .reset = drm_atomic_helper_connector_reset,
> + .destroy = intel_wd_connector_destroy,
> + .fill_modes = drm_helper_probe_single_connector_modes,
> + .atomic_destroy_state =
> drm_atomic_helper_connector_destroy_state,
> + .atomic_duplicate_state =
> drm_atomic_helper_connector_duplicate_state,
> +};
> +
> +static const struct drm_connector_helper_funcs
> wd_connector_helper_funcs = {
> + .get_modes = intel_wd_get_modes,
> + .mode_valid = intel_wd_mode_valid,
> +};
> +
> +static const struct drm_encoder_funcs drm_writeback_encoder_funcs = {
> + .destroy = drm_encoder_cleanup,
> +};
> +
> +static bool intel_fastset_dis(struct intel_encoder *encoder,
> + struct intel_crtc_state *pipe_config) {
> + return false;
> +}
> +
> +static void intel_wd_connector_init(struct intel_wd *intel_wd) {
> + drm_atomic_helper_connector_reset(&intel_wd->wb_conn.base);
> +}
> +
> +static void intel_wd_disable_capture(struct intel_wd *intel_wd) {
> + struct drm_i915_private *dev_priv = to_i915(intel_wd-
> >base.base.dev);
> + u32 tmp;
> +
> + intel_de_write_fw(dev_priv, WD_IMR(intel_wd->trans), 0xFF);
> + tmp = intel_de_read(dev_priv, PIPECONF(intel_wd->trans));
> + tmp &= WD_TRANS_DISABLE;
> + intel_de_write(dev_priv, PIPECONF(intel_wd->trans), tmp);
> + tmp = intel_de_read(dev_priv, WD_TRANS_FUNC_CTL(intel_wd-
> >trans));
> + tmp |= ~TRANS_WD_FUNC_ENABLE;
Not writing this value back to the CTL reg.
> +}
> +
> +void intel_wd_init(struct drm_i915_private *i915, enum transcoder
> +trans) {
> + struct intel_wd *intel_wd;
> + struct intel_encoder *encoder;
> + struct drm_writeback_connector *wb_conn;
> + int n_formats = ARRAY_SIZE(wb_fmts);
> + struct drm_encoder *drm_enc;
> + int err, ret;
> +
> + intel_wd = kzalloc(sizeof(*intel_wd), GFP_KERNEL);
> +
Blank line not needed.
> + if (!intel_wd)
> + return;
> +
> + intel_wd_connector_init(intel_wd);
> + encoder = &intel_wd->base;
> + drm_enc = &encoder->base;
> + wb_conn = &intel_wd->wb_conn;
> + intel_wd->trans = trans;
> + intel_wd->triggered_cap_mode = 1;
> + intel_wd->frame_num = 1;
> + intel_wd->slicing_strategy = 1;
> + encoder->get_config = intel_wd_get_config;
> + encoder->compute_config = intel_wd_compute_config;
> + encoder->get_hw_state = intel_wd_get_hw_state;
> + encoder->type = INTEL_OUTPUT_WD;
> + encoder->cloneable = 0;
> + encoder->pipe_mask = ~0;
> + encoder->power_domain = POWER_DOMAIN_TRANSCODER_B;
> + encoder->get_power_domains = intel_wd_get_power_domains;
> + encoder->initial_fastset_check = intel_fastset_dis;
> +
> + drm_encoder_helper_add(drm_enc,
> + &wd_encoder_helper_funcs);
> +
> + drm_enc->possible_crtcs = ~0;
> + ret = drm_encoder_init(&i915->drm, drm_enc,
> + &drm_writeback_encoder_funcs,
> + DRM_MODE_ENCODER_VIRTUAL, NULL);
> +
> + if (ret) {
> + drm_dbg_kms(&i915->drm,
> + "Writeback drm_encoder init Failed: %d\n",
> + ret);
> + goto cleanup;
> + }
> +
> + err = drm_writeback_connector_init_with_encoder(&i915->drm,
> + wb_conn, drm_enc, &wd_connector_funcs,
> + wb_fmts, n_formats);
> +
> + if (err != 0) {
> + drm_dbg_kms(&i915->drm,
> + "drm_writeback_connector_init: Failed: %d\n",
> + err);
Can you correct the alignment?
> + goto cleanup;
> + }
> +
> + wb_conn->base.encoder = drm_enc;
> + drm_connector_helper_add(&wb_conn->base,
> &wd_connector_helper_funcs);
> + wb_conn->base.status = connector_status_connected;
> + return;
> +
> +cleanup:
> + kfree(intel_wd);
> + return;
> +}
> +
> +static void intel_wd_writeback_complete(struct intel_wd *intel_wd,
> + struct drm_writeback_job *job, int status) {
> + struct drm_writeback_connector *wb_conn =
> + &intel_wd->wb_conn;
> + drm_writeback_signal_completion(wb_conn, status); }
Closing bracket should come on next line.
> +
> +static int intel_wd_setup_transcoder(struct intel_wd *intel_wd,
> + struct intel_crtc_state *pipe_config,
> + struct drm_connector_state *conn_state,
> + struct drm_writeback_job *job)
> +{
> + struct intel_crtc *intel_crtc = to_intel_crtc(pipe_config->uapi.crtc);
> + enum pipe pipe = intel_crtc->pipe;
> + struct drm_framebuffer *fb;
> + struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev);
> + struct drm_gem_object *wd_fb_obj;
> + int ret;
> + u32 stride, tmp;
> + u16 hactive, vactive;
> +
> + fb = job->fb;
> + wd_fb_obj = fb->obj[0];
> + if (!wd_fb_obj) {
> + drm_dbg_kms(&dev_priv->drm, "No framebuffer gem object
> created\n");
> + return -1;
EINVAL;
> + }
> +
> + ret = intel_wd_pin_fb(intel_wd, fb);
> + drm_WARN_ON(&dev_priv->drm, ret != 0);
> + /*Write stride and surface registers in that particular order*/
Please use proper commenting style
/* space followed by text and again space */
> + stride = intel_wd_get_stride(pipe_config, fb->format->format);
> +
> + tmp = intel_de_read(dev_priv, WD_STRIDE(intel_wd->trans));
> + tmp &= ~WD_STRIDE_MASK;
> + tmp |= (stride << WD_STRIDE_SHIFT);
> +
> + intel_de_write(dev_priv, WD_STRIDE(intel_wd->trans), tmp);
> +
> + tmp = intel_de_read(dev_priv, WD_SURF(intel_wd->trans));
> +
> + intel_de_write(dev_priv, WD_SURF(intel_wd->trans),
> + i915_ggtt_offset(intel_wd->vma));
> +
> + tmp = intel_de_read_fw(dev_priv, WD_IIR(intel_wd->trans));
> + intel_de_write_fw(dev_priv, WD_IIR(intel_wd->trans), tmp);
> +
> + tmp = ~(WD_GTT_FAULT_INT | WD_WRITE_COMPLETE_INT |
> WD_FRAME_COMPLETE_INT |
> + WD_VBLANK_INT | WD_OVERRUN_INT |
> WD_CAPTURING_INT);
> + intel_de_write_fw(dev_priv, WD_IMR(intel_wd->trans), tmp);
> +
> + if (intel_wd->stream_cap) {
> + tmp = intel_de_read(dev_priv,
> + WD_STREAMCAP_CTL(intel_wd->trans));
> + tmp |= WD_STREAM_CAP_MODE_EN;
> + intel_configure_slicing_strategy(dev_priv, intel_wd, &tmp);
> + }
> +
> + hactive = pipe_config->uapi.mode.hdisplay;
> + vactive = pipe_config->uapi.mode.vdisplay;
> + tmp = intel_de_read(dev_priv, HTOTAL(intel_wd->trans));
> + tmp = intel_de_read(dev_priv, VTOTAL(intel_wd->trans));
> +
> + /* minimum hactive as per bspec: 64 pixels*/
Recheck on the commenting style
> + if (hactive < 64)
> + drm_err(&dev_priv->drm, "hactive is less then 64 pixels\n");
> +
> + intel_de_write(dev_priv, HTOTAL(intel_wd->trans), hactive - 1);
> + intel_de_write(dev_priv, VTOTAL(intel_wd->trans), vactive - 1);
> +
> + tmp = intel_de_read(dev_priv, WD_TRANS_FUNC_CTL(intel_wd-
> >trans));
> + /* select pixel format */
> + tmp &= ~WD_PIX_FMT_MASK;
> +
> + switch (fb->format->format) {
> + default:
> + fallthrough;
> + case DRM_FORMAT_YUYV:
> + tmp |= WD_PIX_FMT_YUYV;
> + break;
> + case DRM_FORMAT_XYUV8888:
> + tmp |= WD_PIX_FMT_XYUV8888;
> + break;
> + case DRM_FORMAT_XBGR8888:
> + case DRM_FORMAT_XRGB8888:
> + tmp |= WD_PIX_FMT_XBGR8888;
> + break;
> + case DRM_FORMAT_Y410:
> + tmp |= WD_PIX_FMT_Y410;
> + break;
> + case DRM_FORMAT_YUV422:
> + tmp |= WD_PIX_FMT_YUV422;
> + break;
> + case DRM_FORMAT_XBGR2101010:
> + tmp |= WD_PIX_FMT_XBGR2101010;
> + break;
> + case DRM_FORMAT_RGB565:
> + tmp |= WD_PIX_FMT_RGB565;
> + break;
> + }
> +
> + if (intel_wd->triggered_cap_mode)
> + tmp |= WD_TRIGGERED_CAP_MODE_ENABLE;
> +
> + if (intel_wd->stream_cap)
> + tmp |= WD_CTL_POINTER_DTDH;
> +
> + /*select input pipe*/
> + tmp &= ~WD_INPUT_SELECT_MASK;
> + switch (pipe) {
> + default:
> + fallthrough;
> + case PIPE_A:
> + tmp |= WD_INPUT_PIPE_A;
> + break;
> + case PIPE_B:
> + tmp |= WD_INPUT_PIPE_B;
> + break;
> + case PIPE_C:
> + tmp |= WD_INPUT_PIPE_C;
> + break;
> + case PIPE_D:
> + tmp |= WD_INPUT_PIPE_D;
> + break;
> + }
> +
> + /* enable DDI buffer */
> + if (!(tmp & TRANS_WD_FUNC_ENABLE))
> + tmp |= TRANS_WD_FUNC_ENABLE;
> +
> + intel_de_write(dev_priv, WD_TRANS_FUNC_CTL(intel_wd->trans),
> tmp);
> +
> + tmp = intel_de_read(dev_priv, PIPECONF(intel_wd->trans));
> + ret = tmp & WD_TRANS_ACTIVE;
> + if (!ret) {
> + /*enable the transcoder */
> + tmp = intel_de_read(dev_priv, PIPECONF(intel_wd->trans));
> + tmp |= WD_TRANS_ENABLE;
> + intel_de_write(dev_priv, PIPECONF(intel_wd->trans), tmp);
> +
> + /* wait for transcoder to be enabled */
> + if (intel_de_wait_for_set(dev_priv, PIPECONF(intel_wd-
> >trans),
> + WD_TRANS_ACTIVE, 10))
> + drm_err(&dev_priv->drm, "WD transcoder could not
> be enabled\n");
> + }
> +
> + return 0;
> +}
> +
> +static int intel_wd_capture(struct intel_wd *intel_wd,
> + struct intel_crtc_state *pipe_config,
> + struct drm_connector_state *conn_state,
> + struct drm_writeback_job *job)
> +{
> + u32 tmp;
> + struct drm_i915_private *i915 = to_i915(intel_wd->base.base.dev);
> + int ret = 0, status = 0;
> + struct intel_crtc *wd_crtc = intel_wd->wd_crtc;
> + unsigned long flags;
> +
> + if (!job->out_fence)
> + drm_dbg_kms(&i915->drm, "Not able to get out_fence for
> job\n");
> +
> + ret = intel_wd_setup_transcoder(intel_wd, pipe_config,
> + conn_state, job);
> +
> + if (ret < 0) {
> + drm_dbg_kms(&i915->drm,
> + "WD transcoder setup not completed aborting capture\n");
> + return -1;
> + }
> +
> + if (!wd_crtc) {
> + drm_err(&i915->drm, "CRTC not attached\n");
> + return -1;
> + }
> +
> + tmp = intel_de_read_fw(i915,
> + WD_TRANS_FUNC_CTL(intel_wd->trans));
> + tmp |= START_TRIGGER_FRAME;
> + tmp &= ~WD_FRAME_NUMBER_MASK;
> + tmp |= intel_wd->frame_num;
> + intel_de_write_fw(i915,
> + WD_TRANS_FUNC_CTL(intel_wd->trans), tmp);
> +
> + if (!intel_de_wait_for_set(i915, WD_IIR(intel_wd->trans),
> + WD_FRAME_COMPLETE_INT, 100)){
> + drm_dbg_kms(&i915->drm, "frame captured\n");
> + status = 0;
> + } else {
> + drm_dbg_kms(&i915->drm, "frame not captured triggering
> stop frame\n");
> + tmp = intel_de_read(i915,
> + WD_TRANS_FUNC_CTL(intel_wd->trans));
> + tmp |= STOP_TRIGGER_FRAME;
> + intel_de_write(i915,
> + WD_TRANS_FUNC_CTL(intel_wd->trans),
> tmp);
> + status = -1;
> + }
> +
> + intel_wd_writeback_complete(intel_wd, job, status);
> + if (wd_crtc->wd.e) {
> + spin_lock_irqsave(&i915->drm.event_lock, flags);
> + drm_dbg_kms(&i915->drm, "send %p\n", wd_crtc->wd.e);
> + drm_crtc_send_vblank_event(&wd_crtc->base,
> + wd_crtc->wd.e);
> + spin_unlock_irqrestore(&i915->drm.event_lock, flags);
> + wd_crtc->wd.e = NULL;
> + } else {
> + drm_err(&i915->drm, "Event NULL! %p, %p\n", &i915->drm,
> + wd_crtc);
> + }
> + if (!intel_get_writeback_job_from_queue(intel_wd))
> + intel_wd_disable_capture(intel_wd);
> + return 0;
> +}
> +
> +void intel_wd_enable_capture(struct intel_crtc_state *pipe_config,
> + struct drm_connector_state *conn_state) {
> + struct drm_i915_private *i915 =
> + to_i915(conn_state->connector->dev);
> + struct drm_writeback_connector *wb_conn =
> + drm_connector_to_writeback(conn_state->connector);
> + struct intel_wd *intel_wd = wb_conn_to_intel_wd(wb_conn);
> + struct drm_writeback_job *job;
> +
> + job = intel_get_writeback_job_from_queue(intel_wd);
> + if (!job) {
> + drm_dbg_kms(&i915->drm,
> + "job queue is empty not capturing any frame\n");
> + return;
> + }
> +
> + intel_wd_capture(intel_wd, pipe_config,
> + conn_state, job);
> + intel_wd->frame_num += 1;
> +}
> +
> +void intel_wd_set_vblank_event(struct intel_atomic_state *state, struct
> intel_crtc *intel_crtc,
> + struct intel_crtc_state *intel_crtc_state) {
> + struct drm_i915_private *i915 = to_i915(intel_crtc->base.dev);
> + struct drm_crtc_state *crtc_state = &intel_crtc_state->uapi;
> + struct intel_encoder *encoder;
> + struct intel_wd *intel_wd;
> + struct drm_connector_state *conn_state;
> + struct drm_connector *connector;
> + int i;
> +
> + for_each_intel_encoder(&i915->drm, encoder) {
> + if (encoder->type != INTEL_OUTPUT_WD)
> + continue;
> +
> + intel_wd = enc_to_intel_wd(encoder);
> + if (!intel_wd->wd_crtc)
> + return;
> + }
> +
> + if (intel_wd && intel_crtc == intel_wd->wd_crtc) {
> + for_each_new_connector_in_state(&state->base, connector,
> conn_state,
> + i) {
> + if (!conn_state->writeback_job)
> + continue;
> +
> + intel_crtc->wd.e = crtc_state->event;
> + crtc_state->event = NULL;
> + }
> + }
> +}
> +
> +void intel_wd_handle_isr(struct drm_i915_private *i915) {
> + u32 iir_value = 0;
> + struct intel_encoder *encoder;
> + struct intel_wd *intel_wd;
> +
> + iir_value = intel_de_read(i915, WD_IIR(TRANSCODER_WD_0));
> +
> + for_each_intel_encoder(&i915->drm, encoder) {
> +
> + if (encoder->type != INTEL_OUTPUT_WD)
> + continue;
> +
> + intel_wd = enc_to_intel_wd(encoder);
> + if (!intel_wd->wd_crtc) {
> + drm_err(&i915->drm, "NO CRTC attached with
> WD\n");
> + goto clear_iir;
> + }
> + }
> +
> + if (iir_value & WD_FRAME_COMPLETE_INT)
> + return;
> +
> +clear_iir:
> + intel_de_write(i915, WD_IIR(TRANSCODER_WD_0), iir_value); }
> diff --git a/drivers/gpu/drm/i915/display/intel_wd.h
> b/drivers/gpu/drm/i915/display/intel_wd.h
> new file mode 100644
> index 000000000000..0fcd1a746593
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/display/intel_wd.h
> @@ -0,0 +1,48 @@
> +/* SPDX-License-Identifier: MIT*/
> +/*
> + * Copyright © 2022 Intel Corporation
> + */
> +
> +#ifndef _INTEL_WD_H
> +#define _INTEL_WD_H
> +
> +#include <drm/drm_crtc.h>
> +
> +#include "intel_display_types.h"
> +
> +#define I915_MAX_WD_TANSCODERS 2
> +
> +struct intel_wd {
> + struct intel_encoder base;
> + struct drm_writeback_connector wb_conn;
> + struct intel_crtc *wd_crtc;
> + intel_wakeref_t io_wakeref[I915_MAX_WD_TANSCODERS];
> + enum transcoder trans;
> + struct i915_vma *vma;
> + unsigned long flags;
> + struct drm_writeback_job *job;
> + int triggered_cap_mode;
> + int frame_num;
> + bool stream_cap;
> + bool start_capture;
> + int slicing_strategy;
> +};
> +
> +static inline struct intel_wd *enc_to_intel_wd(struct intel_encoder
> +*encoder) {
> + return container_of(&encoder->base, struct intel_wd, base.base); }
> +
> +static inline struct intel_wd *wb_conn_to_intel_wd(struct
> +drm_writeback_connector *wb_conn) {
> + return container_of(wb_conn, struct intel_wd, wb_conn); }
> +
> +void intel_wd_init(struct drm_i915_private *dev_priv, enum transcoder
> +trans); void intel_wd_enable_capture(struct intel_crtc_state *pipe_config,
> + struct drm_connector_state *conn_state); void
> +intel_wd_handle_isr(struct drm_i915_private *dev_priv); void
> +intel_wd_set_vblank_event(struct intel_atomic_state *state, struct
> intel_crtc *crtc,
> + struct intel_crtc_state *crtc_state); struct
> drm_writeback_job
> +*intel_get_writeback_job_from_queue(struct intel_wd *intel_wd);
> +#endif/* _INTEL_WD_H */
> diff --git a/drivers/gpu/drm/i915/i915_drv.h
> b/drivers/gpu/drm/i915/i915_drv.h index 086bbe8945d6..73ef94757fc8
> 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -35,6 +35,7 @@
> #include <linux/pm_qos.h>
>
> #include <drm/drm_connector.h>
> +#include <drm/drm_writeback.h>
> #include <drm/ttm/ttm_device.h>
>
> #include "display/intel_cdclk.h"
> diff --git a/drivers/gpu/drm/i915/i915_irq.c
> b/drivers/gpu/drm/i915/i915_irq.c index 0389f532d926..6504ef528d90
> 100644
> --- a/drivers/gpu/drm/i915/i915_irq.c
> +++ b/drivers/gpu/drm/i915/i915_irq.c
> @@ -42,6 +42,7 @@
> #include "display/intel_hotplug.h"
> #include "display/intel_lpe_audio.h"
> #include "display/intel_psr.h"
> +#include "display/intel_wd.h"
>
> #include "gt/intel_breadcrumbs.h"
> #include "gt/intel_gt.h"
> @@ -2342,6 +2343,11 @@ gen8_de_misc_irq_handler(struct
> drm_i915_private *dev_priv, u32 iir)
> found = true;
> }
>
> + if (iir & GEN8_DE_MISC_WD0) {
> + intel_wd_handle_isr(dev_priv);
> + found = true;
> + }
> +
> if (iir & GEN8_DE_EDP_PSR) {
> struct intel_encoder *encoder;
> u32 psr_iir;
> @@ -3767,7 +3773,7 @@ static void gen8_de_irq_postinstall(struct
> drm_i915_private *dev_priv)
> u32 de_pipe_enables;
> u32 de_port_masked = gen8_de_port_aux_mask(dev_priv);
> u32 de_port_enables;
> - u32 de_misc_masked = GEN8_DE_EDP_PSR;
> + u32 de_misc_masked = GEN8_DE_EDP_PSR | GEN8_DE_MISC_WD0;
> u32 trans_mask = BIT(TRANSCODER_A) | BIT(TRANSCODER_B) |
> BIT(TRANSCODER_C) | BIT(TRANSCODER_D);
> enum pipe pipe;
> diff --git a/drivers/gpu/drm/i915/i915_pci.c
> b/drivers/gpu/drm/i915/i915_pci.c index aacc10f2e73f..636ce7819021
> 100644
> --- a/drivers/gpu/drm/i915/i915_pci.c
> +++ b/drivers/gpu/drm/i915/i915_pci.c
> @@ -864,7 +864,8 @@ static const struct intel_device_info jsl_info = {
> .display.pipe_mask = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C) |
> BIT(PIPE_D), \
> .display.cpu_transcoder_mask = BIT(TRANSCODER_A) |
> BIT(TRANSCODER_B) | \
> BIT(TRANSCODER_C) | BIT(TRANSCODER_D) | \
> - BIT(TRANSCODER_DSI_0) | BIT(TRANSCODER_DSI_1), \
> + BIT(TRANSCODER_DSI_0) | BIT(TRANSCODER_DSI_1) | \
> + BIT(TRANSCODER_WD_0), \
> .display.pipe_offsets = { \
> [TRANSCODER_A] = PIPE_A_OFFSET, \
> [TRANSCODER_B] = PIPE_B_OFFSET, \
> @@ -872,6 +873,8 @@ static const struct intel_device_info jsl_info = {
> [TRANSCODER_D] = PIPE_D_OFFSET, \
> [TRANSCODER_DSI_0] = PIPE_DSI0_OFFSET, \
> [TRANSCODER_DSI_1] = PIPE_DSI1_OFFSET, \
> + [TRANSCODER_WD_0] = PIPE_WD0_OFFSET, \
> + [TRANSCODER_WD_1] = PIPE_WD1_OFFSET, \
> }, \
> .display.trans_offsets = { \
> [TRANSCODER_A] = TRANSCODER_A_OFFSET, \ @@ -880,6
> +883,8 @@ static const struct intel_device_info jsl_info = {
> [TRANSCODER_D] = TRANSCODER_D_OFFSET, \
> [TRANSCODER_DSI_0] = TRANSCODER_DSI0_OFFSET, \
> [TRANSCODER_DSI_1] = TRANSCODER_DSI1_OFFSET, \
> + [TRANSCODER_WD_0] = TRANSCODER_WD0_OFFSET, \
> + [TRANSCODER_WD_1] = TRANSCODER_WD1_OFFSET, \
> }, \
> TGL_CURSOR_OFFSETS, \
> .has_global_mocs = 1, \
> --
> 2.25.1
