drm/msm/dpu: move writeback's atomic_check to dpu_writeback.c

dpu_encoder_phys_wb is the only user of encoder's atomic_check callback.
Move corresponding checks to drm_writeback_connector's implementation
and drop the dpu_encoder_phys_wb_atomic_check() function.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Tested-by: Paloma Arellano <quic_parellan@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/577524/
Link: https://lore.kernel.org/r/20240208-fd_remove_phys_ops_atomic_mode_set-v4-4-caf5dcd125c0@linaro.org

drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c

@@ -354,59 +354,6 @@ static void dpu_encoder_helper_phys_setup_cdm(struct dpu_encoder_phys *phys_enc)
 	}
 }
 
-/**
- * dpu_encoder_phys_wb_atomic_check - verify and fixup given atomic states
- * @phys_enc:	Pointer to physical encoder
- * @crtc_state:	Pointer to CRTC atomic state
- * @conn_state:	Pointer to connector atomic state
- */
-static int dpu_encoder_phys_wb_atomic_check(
-		struct dpu_encoder_phys *phys_enc,
-		struct drm_crtc_state *crtc_state,
-		struct drm_connector_state *conn_state)
-{
-	struct drm_framebuffer *fb;
-	const struct drm_display_mode *mode = &crtc_state->mode;
-
-	DPU_DEBUG("[atomic_check:%d, \"%s\",%d,%d]\n",
-			phys_enc->hw_wb->idx, mode->name, mode->hdisplay, mode->vdisplay);
-
-	if (!conn_state || !conn_state->connector) {
-		DPU_ERROR("invalid connector state\n");
-		return -EINVAL;
-	} else if (conn_state->connector->status !=
-			connector_status_connected) {
-		DPU_ERROR("connector not connected %d\n",
-				conn_state->connector->status);
-		return -EINVAL;
-	}
-
-	if (!conn_state->writeback_job || !conn_state->writeback_job->fb)
-		return 0;
-
-	fb = conn_state->writeback_job->fb;
-
-	DPU_DEBUG("[fb_id:%u][fb:%u,%u]\n", fb->base.id,
-			fb->width, fb->height);
-
-	if (fb->width != mode->hdisplay) {
-		DPU_ERROR("invalid fb w=%d, mode w=%d\n", fb->width,
-				mode->hdisplay);
-		return -EINVAL;
-	} else if (fb->height != mode->vdisplay) {
-		DPU_ERROR("invalid fb h=%d, mode h=%d\n", fb->height,
-				  mode->vdisplay);
-		return -EINVAL;
-	} else if (fb->width > phys_enc->hw_wb->caps->maxlinewidth) {
-		DPU_ERROR("invalid fb w=%d, maxlinewidth=%u\n",
-				  fb->width, phys_enc->hw_wb->caps->maxlinewidth);
-		return -EINVAL;
-	}
-
-	return drm_atomic_helper_check_wb_connector_state(conn_state->connector, conn_state->state);
-}
-
-
 /**
  * _dpu_encoder_phys_wb_update_flush - flush hardware update
  * @phys_enc:	Pointer to physical encoder
@@ -777,7 +724,6 @@ static void dpu_encoder_phys_wb_init_ops(struct dpu_encoder_phys_ops *ops)
 	ops->is_master = dpu_encoder_phys_wb_is_master;
 	ops->enable = dpu_encoder_phys_wb_enable;
 	ops->disable = dpu_encoder_phys_wb_disable;
-	ops->atomic_check = dpu_encoder_phys_wb_atomic_check;
 	ops->wait_for_commit_done = dpu_encoder_phys_wb_wait_for_commit_done;
 	ops->prepare_for_kickoff = dpu_encoder_phys_wb_prepare_for_kickoff;
 	ops->handle_post_kickoff = dpu_encoder_phys_wb_handle_post_kickoff;

drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c

@@ -630,23 +630,26 @@ static int _dpu_kms_initialize_writeback(struct drm_device *dev,
 {
 	struct drm_encoder *encoder = NULL;
 	struct msm_display_info info;
+	const enum dpu_wb wb_idx = WB_2;
+	u32 maxlinewidth;
 	int rc;
 
 	memset(&info, 0, sizeof(info));
 
 	info.num_of_h_tiles = 1;
 	/* use only WB idx 2 instance for DPU */
-	info.h_tile_instance[0] = WB_2;
+	info.h_tile_instance[0] = wb_idx;
 	info.intf_type = INTF_WB;
 
+	maxlinewidth = dpu_rm_get_wb(&dpu_kms->rm, info.h_tile_instance[0])->caps->maxlinewidth;
+
 	encoder = dpu_encoder_init(dev, DRM_MODE_ENCODER_VIRTUAL, &info);
 	if (IS_ERR(encoder)) {
 		DPU_ERROR("encoder init failed for dsi display\n");
 		return PTR_ERR(encoder);
 	}
 
-	rc = dpu_writeback_init(dev, encoder, wb_formats,
-			n_formats);
+	rc = dpu_writeback_init(dev, encoder, wb_formats, n_formats, maxlinewidth);
 	if (rc) {
 		DPU_ERROR("dpu_writeback_init, rc = %d\n", rc);
 		return rc;

drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c

@@ -4,6 +4,7 @@
  */
 
 #include <drm/drm_edid.h>
+#include <drm/drm_framebuffer.h>
 
 #include "dpu_writeback.h"
 
@@ -24,6 +25,61 @@ static int dpu_wb_conn_get_modes(struct drm_connector *connector)
 			dev->mode_config.max_height);
 }
 
+static int dpu_wb_conn_atomic_check(struct drm_connector *connector,
+				    struct drm_atomic_state *state)
+{
+	struct drm_writeback_connector *wb_conn = drm_connector_to_writeback(connector);
+	struct dpu_wb_connector *dpu_wb_conn = to_dpu_wb_conn(wb_conn);
+	struct drm_connector_state *conn_state =
+		drm_atomic_get_new_connector_state(state, connector);
+	struct drm_crtc *crtc;
+	struct drm_crtc_state *crtc_state;
+	const struct drm_display_mode *mode;
+	struct drm_framebuffer *fb;
+
+	DPU_DEBUG("[atomic_check:%d]\n", connector->base.id);
+
+	if (!conn_state || !conn_state->connector) {
+		DPU_ERROR("invalid connector state\n");
+		return -EINVAL;
+	} else if (conn_state->connector->status != connector_status_connected) {
+		DPU_ERROR("connector not connected %d\n", conn_state->connector->status);
+		return -EINVAL;
+	}
+
+	crtc = conn_state->crtc;
+	if (!crtc)
+		return 0;
+
+	if (!conn_state->writeback_job || !conn_state->writeback_job->fb)
+		return 0;
+
+	crtc_state = drm_atomic_get_crtc_state(state, crtc);
+	if (IS_ERR(crtc_state))
+		return PTR_ERR(crtc_state);
+
+	mode = &crtc_state->mode;
+
+	fb = conn_state->writeback_job->fb;
+
+	DPU_DEBUG("[fb_id:%u][fb:%u,%u][mode:\"%s\":%ux%u]\n", fb->base.id, fb->width, fb->height,
+		  mode->name, mode->hdisplay, mode->vdisplay);
+
+	if (fb->width != mode->hdisplay) {
+		DPU_ERROR("invalid fb w=%d, mode w=%d\n", fb->width, mode->hdisplay);
+		return -EINVAL;
+	} else if (fb->height != mode->vdisplay) {
+		DPU_ERROR("invalid fb h=%d, mode h=%d\n", fb->height, mode->vdisplay);
+		return -EINVAL;
+	} else if (fb->width > dpu_wb_conn->maxlinewidth) {
+		DPU_ERROR("invalid fb w=%d, maxlinewidth=%u\n",
+			  fb->width, dpu_wb_conn->maxlinewidth);
+		return -EINVAL;
+	}
+
+	return drm_atomic_helper_check_wb_connector_state(conn_state->connector, conn_state->state);
+}
+
 static const struct drm_connector_funcs dpu_wb_conn_funcs = {
 	.reset = drm_atomic_helper_connector_reset,
 	.fill_modes = drm_helper_probe_single_connector_modes,
@@ -59,12 +115,13 @@ static void dpu_wb_conn_cleanup_job(struct drm_writeback_connector *connector,
 
 static const struct drm_connector_helper_funcs dpu_wb_conn_helper_funcs = {
 	.get_modes = dpu_wb_conn_get_modes,
+	.atomic_check = dpu_wb_conn_atomic_check,
 	.prepare_writeback_job = dpu_wb_conn_prepare_job,
 	.cleanup_writeback_job = dpu_wb_conn_cleanup_job,
 };
 
 int dpu_writeback_init(struct drm_device *dev, struct drm_encoder *enc,
-		const u32 *format_list, u32 num_formats)
+		const u32 *format_list, u32 num_formats, u32 maxlinewidth)
 {
 	struct dpu_wb_connector *dpu_wb_conn;
 	int rc = 0;
@@ -73,6 +130,8 @@ int dpu_writeback_init(struct drm_device *dev, struct drm_encoder *enc,
 	if (!dpu_wb_conn)
 		return -ENOMEM;
 
+	dpu_wb_conn->maxlinewidth = maxlinewidth;
+
 	drm_connector_helper_add(&dpu_wb_conn->base.base, &dpu_wb_conn_helper_funcs);
 
 	/* DPU initializes the encoder and sets it up completely for writeback

drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.h

@@ -18,6 +18,7 @@
 struct dpu_wb_connector {
 	struct drm_writeback_connector base;
 	struct drm_encoder *wb_enc;
+	u32 maxlinewidth;
 };
 
 static inline struct dpu_wb_connector *to_dpu_wb_conn(struct drm_writeback_connector *conn)
@@ -26,6 +27,6 @@ static inline struct dpu_wb_connector *to_dpu_wb_conn(struct drm_writeback_conne
 }
 
 int dpu_writeback_init(struct drm_device *dev, struct drm_encoder *enc,
-		const u32 *format_list, u32 num_formats);
+		const u32 *format_list, u32 num_formats, u32 maxlinewidth);
 
 #endif /*_DPU_WRITEBACK_H */