drm/msm/dpu: make dpu_format_populate_addrs return void

The function msm_framebuffer_iova() can not fail, it always returns a
valid address. Drop the useless checks (that were already performed at
the time) and make dpu_format_populate_addrs() return void.

Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/612247/
Link: https://lore.kernel.org/r/20240903-dpu-mode-config-width-v6-11-617e1ecc4b7a@linaro.org

Author: lumag

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

@@ -588,11 +588,7 @@ static void dpu_encoder_phys_wb_prepare_wb_job(struct dpu_encoder_phys *phys_enc
 		return;
 	}
 
-	ret = dpu_format_populate_addrs(aspace, job->fb, &wb_cfg->dest);
-	if (ret) {
-		DPU_DEBUG("failed to populate layout %d\n", ret);
-		return;
-	}
+	dpu_format_populate_addrs(aspace, job->fb, &wb_cfg->dest);
 
 	wb_cfg->dest.width = job->fb->width;
 	wb_cfg->dest.height = job->fb->height;

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

@@ -277,25 +277,15 @@ int dpu_format_populate_plane_sizes(
 	return _dpu_format_populate_plane_sizes_linear(fmt, fb, layout);
 }
 
-static int _dpu_format_populate_addrs_ubwc(
-		struct msm_gem_address_space *aspace,
-		struct drm_framebuffer *fb,
-		struct dpu_hw_fmt_layout *layout)
+static void _dpu_format_populate_addrs_ubwc(struct msm_gem_address_space *aspace,
+					    struct drm_framebuffer *fb,
+					    struct dpu_hw_fmt_layout *layout)
 {
 	const struct msm_format *fmt;
 	uint32_t base_addr = 0;
 	bool meta;
 
-	if (!fb || !layout) {
-		DRM_ERROR("invalid pointers\n");
-		return -EINVAL;
-	}
-
 	base_addr = msm_framebuffer_iova(fb, aspace, 0);
-	if (!base_addr) {
-		DRM_ERROR("failed to retrieve base addr\n");
-		return -EFAULT;
-	}
 
 	fmt = msm_framebuffer_format(fb);
 	meta = MSM_FORMAT_IS_UBWC(fmt);
@@ -330,7 +320,7 @@ static int _dpu_format_populate_addrs_ubwc(
 			+ layout->plane_size[2] + layout->plane_size[3];
 
 		if (!meta)
-			return 0;
+			return;
 
 		/* configure Y metadata plane */
 		layout->plane_addr[2] = base_addr;
@@ -361,60 +351,36 @@ static int _dpu_format_populate_addrs_ubwc(
 		layout->plane_addr[1] = 0;
 
 		if (!meta)
-			return 0;
+			return;
 
 		layout->plane_addr[2] = base_addr;
 		layout->plane_addr[3] = 0;
 	}
-	return 0;
 }
 
-static int _dpu_format_populate_addrs_linear(
-		struct msm_gem_address_space *aspace,
-		struct drm_framebuffer *fb,
-		struct dpu_hw_fmt_layout *layout)
+static void _dpu_format_populate_addrs_linear(struct msm_gem_address_space *aspace,
+					      struct drm_framebuffer *fb,
+					      struct dpu_hw_fmt_layout *layout)
 {
 	unsigned int i;
 
 	/* Populate addresses for simple formats here */
-	for (i = 0; i < layout->num_planes; ++i) {
+	for (i = 0; i < layout->num_planes; ++i)
 		layout->plane_addr[i] = msm_framebuffer_iova(fb, aspace, i);
-		if (!layout->plane_addr[i]) {
-			DRM_ERROR("failed to retrieve base addr\n");
-			return -EFAULT;
-		}
-	}
-
-	return 0;
 }
 
-int dpu_format_populate_addrs(
-		struct msm_gem_address_space *aspace,
-		struct drm_framebuffer *fb,
-		struct dpu_hw_fmt_layout *layout)
+void dpu_format_populate_addrs(struct msm_gem_address_space *aspace,
+			       struct drm_framebuffer *fb,
+			       struct dpu_hw_fmt_layout *layout)
 {
 	const struct msm_format *fmt;
-	int ret;
-
-	if (!fb || !layout) {
-		DRM_ERROR("invalid arguments\n");
-		return -EINVAL;
-	}
-
-	if ((fb->width > DPU_MAX_IMG_WIDTH) ||
-			(fb->height > DPU_MAX_IMG_HEIGHT)) {
-		DRM_ERROR("image dimensions outside max range\n");
-		return -ERANGE;
-	}
 
 	fmt = msm_framebuffer_format(fb);
 
 	/* Populate the addresses given the fb */
 	if (MSM_FORMAT_IS_UBWC(fmt) ||
 			MSM_FORMAT_IS_TILE(fmt))
-		ret = _dpu_format_populate_addrs_ubwc(aspace, fb, layout);
+		_dpu_format_populate_addrs_ubwc(aspace, fb, layout);
 	else
-		ret = _dpu_format_populate_addrs_linear(aspace, fb, layout);
-
-	return ret;
+		_dpu_format_populate_addrs_linear(aspace, fb, layout);
 }

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

@@ -37,14 +37,10 @@ static inline bool dpu_find_format(u32 format, const u32 *supported_formats,
  * @aspace:            address space pointer
  * @fb:                framebuffer pointer
  * @fmtl:              format layout structure to populate
- *
- * Return: error code on failure, -EAGAIN if success but the addresses
- *         are the same as before or 0 if new addresses were populated
  */
-int dpu_format_populate_addrs(
-		struct msm_gem_address_space *aspace,
-		struct drm_framebuffer *fb,
-		struct dpu_hw_fmt_layout *fmtl);
+void dpu_format_populate_addrs(struct msm_gem_address_space *aspace,
+			       struct drm_framebuffer *fb,
+			       struct dpu_hw_fmt_layout *layout);
 
 int dpu_format_populate_plane_sizes(
 		struct drm_framebuffer *fb,

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

@@ -684,17 +684,9 @@ static int dpu_plane_prepare_fb(struct drm_plane *plane,
 		return ret;
 	}
 
-	/* validate framebuffer layout before commit */
-	ret = dpu_format_populate_addrs(pstate->aspace,
-					new_state->fb,
-					&pstate->layout);
-	if (ret) {
-		DPU_ERROR_PLANE(pdpu, "failed to get format layout, %d\n", ret);
-		if (pstate->aspace)
-			msm_framebuffer_cleanup(new_state->fb, pstate->aspace,
-						pstate->needs_dirtyfb);
-		return ret;
-	}
+	dpu_format_populate_addrs(pstate->aspace,
+				  new_state->fb,
+				  &pstate->layout);
 
 	return 0;
 }