Hi Ayan: Sorry for late.
On Thu, May 16, 2019 at 08:33:45PM +0800, Ayan Halder wrote: > On Thu, May 16, 2019 at 09:13:27AM +0100, james qian wang (Arm Technology > China) wrote: > > Komeda driver uses a individual component to describe the HW's writeback > > caps, but drivers doesn't define a new structure and still uses the > > existing "struct komeda_layer" to describe this new component. > > The detailed changes as follow: > > > > 1. Initialize wb_layer according to HW and report it to CORE. > > 2. CORE exposes wb_layer as a resource to KMS by private_obj. > > 3. Report writeback supporting by add a wb_connector to KMS, and then > > wb_connector will take act as a component resources user, > > so the func komeda_wb_encoder_atomic_check claims komeda resources > > (scaler and wb_layer) accroding to its state configuration to the > > wb_connector. and the wb_state configuration will be validated on the > > specific component resources to see if the caps of component can > > meet the requirement of wb_connector. if not check failed. > > 4. Update irq_handler to notify the completion of writeback. > > > > NOTE: > > This change doesn't add scaling writeback support, that support will > > be added in the future after the scaler support. > > > > v2: Rebase > > v3: Rebase and constify the d71_wb_layer_funcs > > > > Depends on: > > - https://patchwork.freedesktop.org/series/59915/ > > > > Signed-off-by: James Qian Wang (Arm Technology China) > > <james.qian.w...@arm.com> > > --- > > drivers/gpu/drm/arm/display/komeda/Makefile | 1 + > > .../arm/display/komeda/d71/d71_component.c | 90 ++++++++- > > .../gpu/drm/arm/display/komeda/komeda_crtc.c | 15 ++ > > .../arm/display/komeda/komeda_framebuffer.c | 19 ++ > > .../gpu/drm/arm/display/komeda/komeda_kms.c | 4 + > > .../gpu/drm/arm/display/komeda/komeda_kms.h | 27 +++ > > .../drm/arm/display/komeda/komeda_pipeline.h | 7 + > > .../display/komeda/komeda_pipeline_state.c | 51 ++++- > > .../arm/display/komeda/komeda_private_obj.c | 6 + > > .../arm/display/komeda/komeda_wb_connector.c | 181 ++++++++++++++++++ > > 10 files changed, 398 insertions(+), 3 deletions(-) > > create mode 100644 drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c > > > > diff --git a/drivers/gpu/drm/arm/display/komeda/Makefile > > b/drivers/gpu/drm/arm/display/komeda/Makefile > > index 62bd1bff66a3..d7e29fc688c3 100644 > > --- a/drivers/gpu/drm/arm/display/komeda/Makefile > > +++ b/drivers/gpu/drm/arm/display/komeda/Makefile > > @@ -14,6 +14,7 @@ komeda-y := \ > > komeda_kms.o \ > > komeda_crtc.o \ > > komeda_plane.o \ > > + komeda_wb_connector.o \ > > komeda_private_obj.o > > > > komeda-y += \ > > diff --git a/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c > > b/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c > > index 6bab816ed8e7..67e698d0e6aa 100644 > > --- a/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c > > +++ b/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c > > @@ -288,10 +288,98 @@ static int d71_layer_init(struct d71_dev *d71, > > return 0; > > } > > > > +static void d71_wb_layer_update(struct komeda_component *c, > > + struct komeda_component_state *state) > > +{ > > + struct komeda_layer_state *st = to_layer_st(state); > > + struct drm_connector_state *conn_st = state->wb_conn->state; > > + struct drm_framebuffer *fb = conn_st->writeback_job->fb; > > + struct komeda_fb *kfb = to_kfb(fb); > > + u32 __iomem *reg = c->reg; > > + u32 ctrl = L_EN | LW_OFM, mask = L_EN | LW_OFM | LW_TBU_EN; > > + int i; > > + > > + for (i = 0; i < fb->format->num_planes; i++) { > > + malidp_write32(reg + i * LAYER_PER_PLANE_REGS, BLK_P0_PTR_LOW, > > + lower_32_bits(st->addr[i])); > > + malidp_write32(reg + i * LAYER_PER_PLANE_REGS, BLK_P0_PTR_HIGH, > > + upper_32_bits(st->addr[i])); > > + > > + malidp_write32(reg + i * LAYER_PER_PLANE_REGS, BLK_P0_STRIDE, > > + fb->pitches[i] & 0xFFFF); > > + } > > + > > + malidp_write32(reg, LAYER_FMT, kfb->format_caps->hw_id); > > + malidp_write32(reg, BLK_IN_SIZE, HV_SIZE(st->hsize, st->vsize)); > > + malidp_write32(reg, BLK_INPUT_ID0, to_d71_input_id(&state->inputs[0])); > > + malidp_write32_mask(reg, BLK_CONTROL, mask, ctrl); > > +} > > + > > +static void d71_wb_layer_dump(struct komeda_component *c, struct seq_file > > *sf) > > +{ > > + u32 v[12], i; > > + > > + dump_block_header(sf, c->reg); > > + > > + get_values_from_reg(c->reg, 0x80, 1, v); > > + seq_printf(sf, "LW_INPUT_ID0:\t\t0x%X\n", v[0]); > > + > > + get_values_from_reg(c->reg, 0xD0, 3, v); > > + seq_printf(sf, "LW_CONTROL:\t\t0x%X\n", v[0]); > > + seq_printf(sf, "LW_PROG_LINE:\t\t0x%X\n", v[1]); > > + seq_printf(sf, "LW_FORMAT:\t\t0x%X\n", v[2]); > > + > > + get_values_from_reg(c->reg, 0xE0, 1, v); > > + seq_printf(sf, "LW_IN_SIZE:\t\t0x%X\n", v[0]); > > + > > + for (i = 0; i < 2; i++) { > > + get_values_from_reg(c->reg, 0x100 + i * 0x10, 3, v); > > + seq_printf(sf, "LW_P%u_PTR_LOW:\t\t0x%X\n", i, v[0]); > > + seq_printf(sf, "LW_P%u_PTR_HIGH:\t\t0x%X\n", i, v[1]); > > + seq_printf(sf, "LW_P%u_STRIDE:\t\t0x%X\n", i, v[2]); > > + } > > + > > + get_values_from_reg(c->reg, 0x130, 12, v); > > + for (i = 0; i < 12; i++) > > + seq_printf(sf, "LW_RGB_YUV_COEFF%u:\t0x%X\n", i, v[i]); > > +} > > + > > +static void d71_wb_layer_disable(struct komeda_component *c) > > +{ > > + malidp_write32(c->reg, BLK_INPUT_ID0, 0); > > + malidp_write32_mask(c->reg, BLK_CONTROL, L_EN, 0); > > +} > > + > > +static const struct komeda_component_funcs d71_wb_layer_funcs = { > > + .update = d71_wb_layer_update, > > + .disable = d71_wb_layer_disable, > > + .dump_register = d71_wb_layer_dump, > > +}; > > + > > static int d71_wb_layer_init(struct d71_dev *d71, > > struct block_header *blk, u32 __iomem *reg) > > { > > - DRM_DEBUG("Detect D71_Wb_Layer.\n"); > > + struct komeda_component *c; > > + struct komeda_layer *wb_layer; > > + u32 pipe_id, layer_id; > > + > > + get_resources_id(blk->block_info, &pipe_id, &layer_id); > > + > > + c = komeda_component_add(&d71->pipes[pipe_id]->base, sizeof(*wb_layer), > > + layer_id, BLOCK_INFO_INPUT_ID(blk->block_info), > > + &d71_wb_layer_funcs, > > + 1, get_valid_inputs(blk), 0, reg, > > + "LPU%d_LAYER_WR", pipe_id); > > + if (!c) { > I think we should use 'IS_ERR(c)' as komeda_component_add() returns a valid > error code. Yes, you're right it should be IS_ERR(c). thank you for pointing this out. and seems I also need the check all the pending reviews. :) > > > + DRM_ERROR("Failed to add wb_layer component\n"); > > + return -EINVAL; > > + } > > + > > + wb_layer = to_layer(c); > > + wb_layer->layer_type = KOMEDA_FMT_WB_LAYER; > > + > > + set_range(&wb_layer->hsize_in, D71_MIN_LINE_SIZE, d71->max_line_size); > > + set_range(&wb_layer->vsize_in, D71_MIN_VERTICAL_SIZE, d71->max_vsize); > > > > return 0; > > } > > diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c > > b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c > > index 284ce079d8c4..6712603b8c7a 100644 > > --- a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c > > +++ b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c > > @@ -165,6 +165,15 @@ void komeda_crtc_handle_event(struct komeda_crtc > > *kcrtc, > > if (events & KOMEDA_EVENT_VSYNC) > > drm_crtc_handle_vblank(crtc); > > > > + if (events & KOMEDA_EVENT_EOW) { > > + struct komeda_wb_connector *wb_conn = kcrtc->wb_conn; > > + > > + if (wb_conn) > > + drm_writeback_signal_completion(&wb_conn->base, 0); > > + else > > + DRM_WARN("CRTC[%d]: EOW happen but no wb_connector.\n", > > + drm_crtc_index(&kcrtc->base)); > > + } > > /* will handle it together with the write back support */ > > if (events & KOMEDA_EVENT_EOW) > > DRM_DEBUG("EOW.\n"); > > @@ -201,6 +210,8 @@ komeda_crtc_do_flush(struct drm_crtc *crtc, > > struct komeda_crtc_state *kcrtc_st = to_kcrtc_st(crtc->state); > > struct komeda_dev *mdev = kcrtc->base.dev->dev_private; > > struct komeda_pipeline *master = kcrtc->master; > > + struct komeda_wb_connector *wb_conn = kcrtc->wb_conn; > > + struct drm_connector_state *conn_st; > > > > DRM_DEBUG_ATOMIC("CRTC%d_FLUSH: active_pipes: 0x%x, affected: 0x%x.\n", > > drm_crtc_index(crtc), > > @@ -210,6 +221,10 @@ komeda_crtc_do_flush(struct drm_crtc *crtc, > > if (has_bit(master->id, kcrtc_st->affected_pipes)) > > komeda_pipeline_update(master, old->state); > > > > + conn_st = wb_conn ? wb_conn->base.base.state : NULL; > > + if (conn_st && conn_st->writeback_job) > > + drm_writeback_queue_job(&wb_conn->base, conn_st); > > + > > /* step 2: notify the HW to kickoff the update */ > > mdev->funcs->flush(mdev, master->id, kcrtc_st->active_pipes); > > } > > diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c > > b/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c > > index 9cc9935024f7..4d8160cf09c3 100644 > > --- a/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c > > +++ b/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c > > @@ -165,3 +165,22 @@ komeda_fb_get_pixel_addr(struct komeda_fb *kfb, int x, > > int y, int plane) > > > > return obj->paddr + offset; > > } > > + > > +/* if the fb can be supported by a specific layer */ > > +bool komeda_fb_is_layer_supported(struct komeda_fb *kfb, u32 layer_type) > > +{ > > + struct drm_framebuffer *fb = &kfb->base; > > + struct komeda_dev *mdev = fb->dev->dev_private; > > + const struct komeda_format_caps *caps; > > + u32 fourcc = fb->format->format; > > + u64 modifier = fb->modifier; > > + > > + caps = komeda_get_format_caps(&mdev->fmt_tbl, fourcc, modifier); > > + if (!caps) > > + return false; > > + > > + if (!(caps->supported_layer_types & layer_type)) > > + return false; > > + > > + return true; > > +} > > diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_kms.c > > b/drivers/gpu/drm/arm/display/komeda/komeda_kms.c > > index 86f6542afb40..3e58901fb776 100644 > > --- a/drivers/gpu/drm/arm/display/komeda/komeda_kms.c > > +++ b/drivers/gpu/drm/arm/display/komeda/komeda_kms.c > > @@ -188,6 +188,10 @@ struct komeda_kms_dev *komeda_kms_attach(struct > > komeda_dev *mdev) > > if (err) > > goto cleanup_mode_config; > > > > + err = komeda_kms_add_wb_connectors(kms, mdev); > > + if (err) > > + goto cleanup_mode_config; > > + > > err = component_bind_all(mdev->dev, kms); > > if (err) > > goto cleanup_mode_config; > > diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_kms.h > > b/drivers/gpu/drm/arm/display/komeda/komeda_kms.h > > index ac3d9209b4d9..f16e9e577593 100644 > > --- a/drivers/gpu/drm/arm/display/komeda/komeda_kms.h > > +++ b/drivers/gpu/drm/arm/display/komeda/komeda_kms.h > > @@ -12,6 +12,7 @@ > > #include <drm/drm_crtc_helper.h> > > #include <drm/drm_device.h> > > #include <drm/drm_writeback.h> > > +#include <drm/drm_print.h> > > #include <video/videomode.h> > > #include <video/display_timing.h> > > > > @@ -73,6 +74,9 @@ struct komeda_crtc { > > */ > > struct komeda_pipeline *slave; > > > > + /** @wb_conn: komeda write back connector */ > > + struct komeda_wb_connector *wb_conn; > > + > > /** @disable_done: this flip_done is for tracing the disable */ > > struct completion *disable_done; > > }; > > @@ -116,6 +120,27 @@ struct komeda_kms_dev { > > #define to_kcrtc(p) container_of(p, struct komeda_crtc, base) > > #define to_kcrtc_st(p) container_of(p, struct komeda_crtc_state, base) > > #define to_kdev(p) container_of(p, struct komeda_kms_dev, base) > > +#define to_wb_conn(x) container_of(x, struct drm_writeback_connector, > > base) > > + > > +static inline bool is_writeback_only(struct drm_crtc_state *st) > > +{ > > + struct komeda_wb_connector *wb_conn = to_kcrtc(st->crtc)->wb_conn; > > + struct drm_connector *conn = wb_conn ? &wb_conn->base.base : NULL; > > + > > + return conn && (st->connector_mask == BIT(drm_connector_index(conn))); > > +} > > + > > +static inline bool > > +is_only_changed_connector(struct drm_crtc_state *st, struct drm_connector > > *conn) > > +{ > > + struct drm_crtc_state *old_st; > > + u32 changed_connectors; > > + > > + old_st = drm_atomic_get_old_crtc_state(st->state, st->crtc); > > + changed_connectors = st->connector_mask ^ old_st->connector_mask; > > + > > + return BIT(drm_connector_index(conn)) == changed_connectors; > > +} > > > > int komeda_kms_setup_crtcs(struct komeda_kms_dev *kms, struct komeda_dev > > *mdev); > > > > @@ -123,6 +148,8 @@ int komeda_kms_add_crtcs(struct komeda_kms_dev *kms, > > struct komeda_dev *mdev); > > int komeda_kms_add_planes(struct komeda_kms_dev *kms, struct komeda_dev > > *mdev); > > int komeda_kms_add_private_objs(struct komeda_kms_dev *kms, > > struct komeda_dev *mdev); > > +int komeda_kms_add_wb_connectors(struct komeda_kms_dev *kms, > > + struct komeda_dev *mdev); > > void komeda_kms_cleanup_private_objs(struct komeda_kms_dev *kms); > > > > void komeda_crtc_handle_event(struct komeda_crtc *kcrtc, > > diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h > > b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h > > index bae8a32b81a6..1b7e933ea303 100644 > > --- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h > > +++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h > > @@ -423,10 +423,17 @@ struct komeda_plane_state; > > struct komeda_crtc_state; > > struct komeda_crtc; > > > > +void pipeline_composition_size(struct komeda_crtc_state *kcrtc_st, > > + u16 *hsize, u16 *vsize); > > + > > int komeda_build_layer_data_flow(struct komeda_layer *layer, > > struct komeda_plane_state *kplane_st, > > struct komeda_crtc_state *kcrtc_st, > > struct komeda_data_flow_cfg *dflow); > > +int komeda_build_wb_data_flow(struct komeda_layer *wb_layer, > > + struct drm_connector_state *conn_st, > > + struct komeda_crtc_state *kcrtc_st, > > + struct komeda_data_flow_cfg *dflow); > > int komeda_build_display_data_flow(struct komeda_crtc *kcrtc, > > struct komeda_crtc_state *kcrtc_st); > > > > diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c > > b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c > > index 36570d7dad61..9748c9438868 100644 > > --- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c > > +++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c > > @@ -308,8 +308,41 @@ komeda_layer_validate(struct komeda_layer *layer, > > return 0; > > } > > > > -static void pipeline_composition_size(struct komeda_crtc_state *kcrtc_st, > > - u16 *hsize, u16 *vsize) > > +static int > > +komeda_wb_layer_validate(struct komeda_layer *wb_layer, > > + struct drm_connector_state *conn_st, > > + struct komeda_data_flow_cfg *dflow) > > +{ > > + struct komeda_fb *kfb = to_kfb(conn_st->writeback_job->fb); > > + struct komeda_component_state *c_st; > > + struct komeda_layer_state *st; > > + int i; > > + > > + if (!komeda_fb_is_layer_supported(kfb, wb_layer->layer_type)) > > + return -EINVAL; > > + > > + c_st = komeda_component_get_state_and_set_user(&wb_layer->base, > > + conn_st->state, conn_st->connector, conn_st->crtc); > > + if (IS_ERR(c_st)) > > + return PTR_ERR(c_st); > > + > > + st = to_layer_st(c_st); > > + > > + st->hsize = dflow->out_w; > > + st->vsize = dflow->out_h; > > + > > + for (i = 0; i < kfb->base.format->num_planes; i++) > > + st->addr[i] = komeda_fb_get_pixel_addr(kfb, dflow->out_x, > > + dflow->out_y, i); > > + > > + komeda_component_add_input(&st->base, &dflow->input, 0); > > + komeda_component_set_output(&dflow->input, &wb_layer->base, 0); > > + > > + return 0; > > +} > > + > > +void pipeline_composition_size(struct komeda_crtc_state *kcrtc_st, > > + u16 *hsize, u16 *vsize) > > { > > struct drm_display_mode *m = &kcrtc_st->base.adjusted_mode; > > > > @@ -478,6 +511,20 @@ int komeda_build_layer_data_flow(struct komeda_layer > > *layer, > > return err; > > } > > > > +int komeda_build_wb_data_flow(struct komeda_layer *wb_layer, > > + struct drm_connector_state *conn_st, > > + struct komeda_crtc_state *kcrtc_st, > > + struct komeda_data_flow_cfg *dflow) > > +{ > > + if ((dflow->in_w != dflow->out_w) || > > + (dflow->in_h != dflow->out_h)) { > > + DRM_DEBUG_ATOMIC("current do not support scaling writeback.\n"); > > + return -EINVAL; > > + } > > + > > + return komeda_wb_layer_validate(wb_layer, conn_st, dflow); > > +} > > + > > /* build display output data flow, the data path is: > > * compiz -> improc -> timing_ctrlr > > */ > > diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_private_obj.c > > b/drivers/gpu/drm/arm/display/komeda/komeda_private_obj.c > > index a54878cbd6e4..d53bd6c23c5d 100644 > > --- a/drivers/gpu/drm/arm/display/komeda/komeda_private_obj.c > > +++ b/drivers/gpu/drm/arm/display/komeda/komeda_private_obj.c > > @@ -252,6 +252,12 @@ int komeda_kms_add_private_objs(struct komeda_kms_dev > > *kms, > > return err; > > } > > > > + if (pipe->wb_layer) { > > + err = komeda_layer_obj_add(kms, pipe->wb_layer); > > + if (err) > > + return err; > > + } > > + > > err = komeda_compiz_obj_add(kms, pipe->compiz); > > if (err) > > return err; > > diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c > > b/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c > > new file mode 100644 > > index 000000000000..0c1a4220c280 > > --- /dev/null > > +++ b/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c > > @@ -0,0 +1,181 @@ > > +// SPDX-License-Identifier: GPL-2.0 > > +/* > > + * (C) COPYRIGHT 2018 ARM Limited. All rights reserved. > > + * Author: James.Qian.Wang <james.qian.w...@arm.com> > > + * > > + */ > > +#include "komeda_dev.h" > > +#include "komeda_kms.h" > > + > > +static int > > +komeda_wb_init_data_flow(struct komeda_layer *wb_layer, > > + struct drm_connector_state *conn_st, > > + struct komeda_crtc_state *kcrtc_st, > > + struct komeda_data_flow_cfg *dflow) > > +{ > > + struct drm_framebuffer *fb = conn_st->writeback_job ? > > + conn_st->writeback_job->fb : NULL; > > + > > + if (!fb) > > + return -EINVAL; > > + > > + memset(dflow, 0, sizeof(*dflow)); > > + > > + dflow->out_w = fb->width; > > + dflow->out_h = fb->height; > > + > > + /* the write back data comes from the compiz */ > > + pipeline_composition_size(kcrtc_st, &dflow->in_w, &dflow->in_h); > > + dflow->input.component = &wb_layer->base.pipeline->compiz->base; > > + /* compiz doesn't output alpha */ > > + dflow->pixel_blend_mode = DRM_MODE_BLEND_PIXEL_NONE; > > + dflow->rot = DRM_MODE_ROTATE_0; > > + > > + return 0; > > +} > > + > > +static int > > +komeda_wb_encoder_atomic_check(struct drm_encoder *encoder, > > + struct drm_crtc_state *crtc_st, > > + struct drm_connector_state *conn_st) > > +{ > > + struct komeda_crtc_state *kcrtc_st = to_kcrtc_st(crtc_st); > > + struct komeda_layer *wb_layer; > > + struct komeda_data_flow_cfg dflow; > > + int err; > > + > > + if (!crtc_st->active) { > > + DRM_DEBUG_ATOMIC("Cannot write the composition result out on a > > inactive CRTC.\n"); > > + return -EINVAL; > > + } > > + > > + wb_layer = to_kconn(to_wb_conn(conn_st->connector))->wb_layer; > > + > > + /* > > + * No need for a full modested when the only connector changed is the > > + * writeback connector. > > + */ > > + if (crtc_st->connectors_changed && > > + is_only_changed_connector(crtc_st, conn_st->connector)) > > + crtc_st->connectors_changed = false; > > + > > + err = komeda_wb_init_data_flow(wb_layer, conn_st, kcrtc_st, &dflow); > > + if (err) > > + return err; > > + > > + return komeda_build_wb_data_flow(wb_layer, conn_st, kcrtc_st, &dflow); > > +} > > + > > +static const struct drm_encoder_helper_funcs > > komeda_wb_encoder_helper_funcs = { > > + .atomic_check = komeda_wb_encoder_atomic_check, > > +}; > > + > > +static int > > +komeda_wb_connector_get_modes(struct drm_connector *connector) > > +{ > > + return 0; > > +} > Can we remove this ? > this function is for drm_connector_helper_funcs->get_modes, which is essential, we can not set it to NULL. > > + > > +static enum drm_mode_status > > +komeda_wb_connector_mode_valid(struct drm_connector *connector, > > + struct drm_display_mode *mode) > > +{ > > + struct drm_device *dev = connector->dev; > > + struct drm_mode_config *mode_config = &dev->mode_config; > > + int w = mode->hdisplay, h = mode->vdisplay; > > + > > + if ((w < mode_config->min_width) || (w > mode_config->max_width)) > > + return MODE_BAD_HVALUE; > > + > > + if ((h < mode_config->min_height) || (h > mode_config->max_height)) > > + return MODE_BAD_VVALUE; > > + > > + return MODE_OK; > > +} > > + > > +static const struct drm_connector_helper_funcs komeda_wb_conn_helper_funcs > > = { > > + .get_modes = komeda_wb_connector_get_modes, > > + .mode_valid = komeda_wb_connector_mode_valid, > > +}; > > + > > +static enum drm_connector_status > > +komeda_wb_connector_detect(struct drm_connector *connector, bool force) > > +{ > > + return connector_status_connected; > > +} > > + > > +static int > > +komeda_wb_connector_fill_modes(struct drm_connector *connector, > > + uint32_t maxX, uint32_t maxY) > > +{ > > + return 0; > > +} > Can we remove this as well ? This function is for drm_connector_func->fill_modes which also is essential. > > > + > > +static void komeda_wb_connector_destroy(struct drm_connector *connector) > > +{ > > + drm_connector_cleanup(connector); > > + kfree(to_kconn(to_wb_conn(connector))); > > +} > > + > > +static const struct drm_connector_funcs komeda_wb_connector_funcs = { > > + .reset = drm_atomic_helper_connector_reset, > > + .detect = komeda_wb_connector_detect, > > + .fill_modes = komeda_wb_connector_fill_modes, > > + .destroy = komeda_wb_connector_destroy, > > + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, > > + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, > > +}; > > + > > +static int komeda_wb_connector_add(struct komeda_kms_dev *kms, > > + struct komeda_crtc *kcrtc) > > +{ > > + struct komeda_dev *mdev = kms->base.dev_private; > > + struct komeda_wb_connector *kwb_conn; > > + struct drm_writeback_connector *wb_conn; > > + u32 *formats, n_formats = 0; > > + int err; > > + > > + if (!kcrtc->master->wb_layer) > > + return 0; > > + > > + kwb_conn = kzalloc(sizeof(*wb_conn), GFP_KERNEL); > > + if (!kwb_conn) > > + return -ENOMEM; > > + > > + kwb_conn->wb_layer = kcrtc->master->wb_layer; > > + > > + wb_conn = &kwb_conn->base; > > + wb_conn->encoder.possible_crtcs = BIT(drm_crtc_index(&kcrtc->base)); > > + > > + formats = komeda_get_layer_fourcc_list(&mdev->fmt_tbl, > > + kwb_conn->wb_layer->layer_type, > > + &n_formats); > > + > We be doing a null check on formats here as we are dereferencing it > in the next function. > Do you mean the valid check for formats, I don't think it is necessary. Since even it is a NULL ptr, and which may lead drm_writeback_connector_init fail. and for the put_fourcc_list which is a kfree acctually. and kfree always ignore the free if the input ptr is NULL. > > + err = drm_writeback_connector_init(&kms->base, wb_conn, > > + &komeda_wb_connector_funcs, > > + &komeda_wb_encoder_helper_funcs, > > + formats, n_formats); > > + komeda_put_fourcc_list(formats); > > + if (err) > > + return err; > > + > > + drm_connector_helper_add(&wb_conn->base, &komeda_wb_conn_helper_funcs); > > + > > + kcrtc->wb_conn = kwb_conn; > > + > > + return 0; > > +} > > + > > +int komeda_kms_add_wb_connectors(struct komeda_kms_dev *kms, > > + struct komeda_dev *mdev) > > +{ > > + int i, err; > > + > > + for (i = 0; i < kms->n_crtcs; i++) { > > + err = komeda_wb_connector_add(kms, &kms->crtcs[i]); > > + if (err) > > + return err; > > + } > > + > > + return 0; > > +} > > -- > > 2.17.1 > > _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
