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Tue, 07 Jan 2020 17:39:06 -0800 (PST) From: Rob Clark To: dri-devel@lists.freedesktop.org Cc: devicetree@vger.kernel.org, freedreno@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, Bjorn Andersson , Jordan Crouse , Sharat Masetty , Rob Clark , Rob Clark , Sean Paul , David Airlie , Daniel Vetter , Greg Kroah-Hartman , Douglas Anderson , Brian Masney , Fabio Estevam , Thomas Gleixner , linux-kernel@vger.kernel.org (open list) Subject: [PATCH 1/3] drm/msm: support firmware-name for zap fw Date: Tue, 7 Jan 2020 17:38:42 -0800 Message-Id: <20200108013847.899170-2-robdclark@gmail.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200108013847.899170-1-robdclark@gmail.com> References: <20200108013847.899170-1-robdclark@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Rob Clark Since zap firmware can be device specific, allow for a firmware-name property in the zap node to specify which firmware to load, similarly to the scheme used for dsp/wifi/etc. Signed-off-by: Rob Clark --- drivers/gpu/drm/msm/adreno/adreno_gpu.c | 32 ++++++++++++++++++++++--- 1 file changed, 29 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c index 112e8b8a261e..aa8737bd58db 100644 --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c @@ -26,6 +26,7 @@ static int zap_shader_load_mdt(struct msm_gpu *gpu, const char *fwname, { struct device *dev = &gpu->pdev->dev; const struct firmware *fw; + const char *signed_fwname = NULL; struct device_node *np, *mem_np; struct resource r; phys_addr_t mem_phys; @@ -58,8 +59,33 @@ static int zap_shader_load_mdt(struct msm_gpu *gpu, const char *fwname, mem_phys = r.start; - /* Request the MDT file for the firmware */ - fw = adreno_request_fw(to_adreno_gpu(gpu), fwname); + /* + * Check for a firmware-name property. This is the new scheme + * to handle firmware that may be signed with device specific + * keys, allowing us to have a different zap fw path for different + * devices. + * + * If the firmware-name property is found, we bypass the + * adreno_request_fw() mechanism, because we don't need to handle + * the /lib/firmware/qcom/* vs /lib/firmware/* case. + * + * If the firmware-name property is not found, for backwards + * compatibility we fall back to the fwname from the gpulist + * table. + */ + of_property_read_string_index(np, "firmware-name", 0, &signed_fwname); + if (signed_fwname) { + fwname = signed_fwname; + ret = request_firmware_direct(&fw, signed_fwname, gpu->dev->dev); + if (ret) { + DRM_DEV_ERROR(dev, "could not load signed zap firmware: %d\n", ret); + fw = ERR_PTR(ret); + } + } else { + /* Request the MDT file for the firmware */ + fw = adreno_request_fw(to_adreno_gpu(gpu), fwname); + } + if (IS_ERR(fw)) { DRM_DEV_ERROR(dev, "Unable to load %s\n", fwname); return PTR_ERR(fw); @@ -95,7 +121,7 @@ static int zap_shader_load_mdt(struct msm_gpu *gpu, const char *fwname, * not. But since we've already gotten through adreno_request_fw() * we know which of the two cases it is: */ - if (to_adreno_gpu(gpu)->fwloc == FW_LOCATION_LEGACY) { + if (signed_fwname || (to_adreno_gpu(gpu)->fwloc == FW_LOCATION_LEGACY)) { ret = qcom_mdt_load(dev, fw, fwname, pasid, mem_region, mem_phys, mem_size, NULL); } else { -- 2.24.1