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drm/msm: support firmware-name for zap fw (v2)

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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.

v2: only need a single error msg when we can't load from firmware-name
    specified path, and fix comment [Bjorn A.]

Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Jordan Crouse <jcrouse@codeaurora.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Rob Clark 2020-01-07 16:24:16 -08:00
parent d4bbcade0e
commit 6a0dea02c2
1 changed files with 27 additions and 3 deletions
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30
drivers/gpu/drm/msm/adreno/adreno_gpu.c
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@ -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 +59,31 @@ 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, fwname, gpu->dev->dev);
if (ret)
fw = ERR_PTR(ret);
} else {
/* Request the MDT file from the default location: */
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 +119,7 @@ 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 {