From: Rob Clark <robdclark@gmail.com>
To: dri-devel@lists.freedesktop.org
Cc: devicetree@vger.kernel.org, freedreno@lists.freedesktop.org,
linux-arm-msm@vger.kernel.org,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Jordan Crouse <jcrouse@codeaurora.org>,
Sharat Masetty <smasetty@codeaurora.org>,
Rob Clark <robdclark@chromium.org>,
Rob Clark <robdclark@gmail.com>, Sean Paul <sean@poorly.run>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Douglas Anderson <dianders@chromium.org>,
Brian Masney <masneyb@onstation.org>,
Fabio Estevam <festevam@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
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 [thread overview]
Message-ID: <20200108013847.899170-2-robdclark@gmail.com> (raw)
In-Reply-To: <20200108013847.899170-1-robdclark@gmail.com>
From: Rob Clark <robdclark@chromium.org>
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 <robdclark@chromium.org>
---
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
next prev parent reply other threads:[~2020-01-08 1:39 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-08 1:38 [PATCH 0/3] drm/msm: use firmware-name to find zap fw Rob Clark
2020-01-08 1:38 ` Rob Clark [this message]
2020-01-08 5:00 ` [PATCH 1/3] drm/msm: support firmware-name for " Bjorn Andersson
2020-01-08 15:38 ` Tom Rix
2020-01-08 16:30 ` Rob Clark
2020-01-12 19:36 ` Rob Clark
2020-01-08 18:48 ` Jordan Crouse
2020-01-08 19:04 ` Bjorn Andersson
2020-01-08 1:38 ` [PATCH 2/3] dt-bindings: drm/msm/gpu: Document firmware-name Rob Clark
2020-01-08 4:57 ` Bjorn Andersson
2020-01-08 1:38 ` [PATCH 3/3] arm64: dts: sdm845: move gpu zap nodes to per-device dts Rob Clark
2020-01-08 4:57 ` Bjorn Andersson
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