From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 473A61C07C4; Tue, 27 May 2025 17:44:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748367846; cv=none; b=P92bL6c037wj1S6aACic4LybHewWDMt90NWYqAEt6ByoHMpx/ldku6BuMLjErJRPtoSIg8aLUX3wlJf0nfwTC7gbWT/YZVtRrYGWn2B60Qn0KIrKCCgpCZiDHCS9xb++nan6Lyjjzch6/7afvKVL105MEBEewU8Z6sL9rI42aVk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748367846; c=relaxed/simple; bh=ulTraP4mHIlmthAaQsrvY/78Y1trFBinm5bA2Z8fXdg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=HDJj7kzdFOQzqzWxXjie5P1Cbwr8G06J0PVXXZr/hD6Ui4YMV43fKzLUsa/qPPpLgg8fU03PH8CmZrHPa7FIGGt7s0pjYkJ7qtOl1kIRvn48Vs5z9zoe8vhrCrz7GQlhGQyCQo2oLGJXKZn2UnjjmDqDxpcV9XBt8yy17QKvfII= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=OQxKHtFu; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="OQxKHtFu" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B90D7C4CEE9; Tue, 27 May 2025 17:44:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1748367846; bh=ulTraP4mHIlmthAaQsrvY/78Y1trFBinm5bA2Z8fXdg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OQxKHtFuUCqzevEbVE2z8XuQ6WgbqYCGgXm0up/Q0XP8f+epDOsFgdCwe4ZSHG1dY ff9ll/m36Bs/cqVJ2mSNVUywP9q5ahV0h8Gltd0jrl+A1NPlZhssawULywN0n4SP8z 3pscchFOoc+LTbgphg2wK2Sh2Pqy2E2BstL2vphE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Stefan Wahren , =?UTF-8?q?Ma=C3=ADra=20Canal?= , Sasha Levin Subject: [PATCH 6.14 510/783] drm/v3d: Add clock handling Date: Tue, 27 May 2025 18:25:07 +0200 Message-ID: <20250527162533.910596190@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250527162513.035720581@linuxfoundation.org> References: <20250527162513.035720581@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Stefan Wahren [ Upstream commit 4dd40b5f9c3d89b67af0dbe059cf4a51aac6bf06 ] Since the initial commit 57692c94dcbe ("drm/v3d: Introduce a new DRM driver for Broadcom V3D V3.x+") the struct v3d_dev reserved a pointer for an optional V3D clock. But there wasn't any code, which fetched it. So add the missing clock handling before accessing any V3D registers. Signed-off-by: Stefan Wahren Reviewed-by: Maíra Canal Signed-off-by: Maíra Canal Link: https://patchwork.freedesktop.org/patch/msgid/20250201125046.33030-1-wahrenst@gmx.net Signed-off-by: Sasha Levin --- drivers/gpu/drm/v3d/v3d_drv.c | 25 ++++++++++++++++++++----- 1 file changed, 20 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/v3d/v3d_drv.c b/drivers/gpu/drm/v3d/v3d_drv.c index 930737a9347b6..852015214e971 100644 --- a/drivers/gpu/drm/v3d/v3d_drv.c +++ b/drivers/gpu/drm/v3d/v3d_drv.c @@ -295,11 +295,21 @@ static int v3d_platform_drm_probe(struct platform_device *pdev) if (ret) return ret; + v3d->clk = devm_clk_get_optional(dev, NULL); + if (IS_ERR(v3d->clk)) + return dev_err_probe(dev, PTR_ERR(v3d->clk), "Failed to get V3D clock\n"); + + ret = clk_prepare_enable(v3d->clk); + if (ret) { + dev_err(&pdev->dev, "Couldn't enable the V3D clock\n"); + return ret; + } + mmu_debug = V3D_READ(V3D_MMU_DEBUG_INFO); mask = DMA_BIT_MASK(30 + V3D_GET_FIELD(mmu_debug, V3D_MMU_PA_WIDTH)); ret = dma_set_mask_and_coherent(dev, mask); if (ret) - return ret; + goto clk_disable; v3d->va_width = 30 + V3D_GET_FIELD(mmu_debug, V3D_MMU_VA_WIDTH); @@ -319,28 +329,29 @@ static int v3d_platform_drm_probe(struct platform_device *pdev) ret = PTR_ERR(v3d->reset); if (ret == -EPROBE_DEFER) - return ret; + goto clk_disable; v3d->reset = NULL; ret = map_regs(v3d, &v3d->bridge_regs, "bridge"); if (ret) { dev_err(dev, "Failed to get reset control or bridge regs\n"); - return ret; + goto clk_disable; } } if (v3d->ver < 41) { ret = map_regs(v3d, &v3d->gca_regs, "gca"); if (ret) - return ret; + goto clk_disable; } v3d->mmu_scratch = dma_alloc_wc(dev, 4096, &v3d->mmu_scratch_paddr, GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO); if (!v3d->mmu_scratch) { dev_err(dev, "Failed to allocate MMU scratch page\n"); - return -ENOMEM; + ret = -ENOMEM; + goto clk_disable; } ret = v3d_gem_init(drm); @@ -369,6 +380,8 @@ static int v3d_platform_drm_probe(struct platform_device *pdev) v3d_gem_destroy(drm); dma_free: dma_free_wc(dev, 4096, v3d->mmu_scratch, v3d->mmu_scratch_paddr); +clk_disable: + clk_disable_unprepare(v3d->clk); return ret; } @@ -386,6 +399,8 @@ static void v3d_platform_drm_remove(struct platform_device *pdev) dma_free_wc(v3d->drm.dev, 4096, v3d->mmu_scratch, v3d->mmu_scratch_paddr); + + clk_disable_unprepare(v3d->clk); } static struct platform_driver v3d_platform_driver = { -- 2.39.5