Re: [PATCH 1/1] firmware/dmc/icl: load v1.07 on icelake.

[Imre Deak <imre.deak@intel.com>]

On Wed, Sep 05, 2018 at 12:07:43PM +0300, Joonas Lahtinen wrote:
> Quoting Rodrigo Vivi (2018-09-04 08:27:14)
> > On Mon, Sep 03, 2018 at 01:00:39PM +0300, Imre Deak wrote:
> > > On Mon, Aug 27, 2018 at 05:38:44PM -0700, Anusha Srivatsa wrote:
> > > > Add Support to load DMC on Icelake.
> > > > 
> > > > While at it, also add support to load the firmware
> > > > during system resume.
> > > > 
> > > > v2: load firmware during system resume.(Imre)
> > > > 
> > > > v3: enable has_csr for icelake.(Jyoti)
> > > > 
> > > > v4: Only load the firmware in this patch
> > > > 
> > > > Cc: Jyoti Yadav <jyoti.r.yadav@intel.com>
> > > > Cc: Imre Deak <imre.deak@intel.com>
> > > > Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
> > > > Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
> > > > Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
> > > 
> > > Reviewed-by: Imre Deak <imre.deak@intel.com>
> > > 
> > > Is it ok to push this already now that the ICL 1.07 firmware is in [1]
> > > or do we have to wait until it propagates to [2]?
> > 
> > The main motivation behind having drm-firmware is the unpredictability
> > of linux-firmware.git pull requests acceptance. It may take 1 day or it
> > may take 2 months.
> > 
> > So on drm-firmware we at least have it public in a way OSVs
> > could easisly backport. Although hopefully by the end of 4.20
> > cycle I believe it will be there on linux-firmware.git already.
> > 
> > So if fw is already on drm-firmware and passing all tests
> > we should be able to push the patch to dinq.
> 
> Was not the decision that we only gate the MODULE_FIRMWARE line until
> the firmware is in linux-firmware.git?
> 
> So it should be no harm to support loading firmwares that are available
> from drm-firmware.git as long as we don't add the MODULE_FIRMWARE which
> would trigger false positives for distro packagers.

Ok, makes sense. I missed the lack of MODULE_FIRMWARE line during
my review:/ but that's ok then, we should add that later enabling DMC
already now in CI.

Thanks,
Imre

> 
> Regards, Joonas
> 
> > 
> > Thanks,
> > Rodrigo.
> > 
> > > 
> > > [1] https://cgit.freedesktop.org/drm/drm-firmware/
> > > [2] https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git
> > > 
> > > > ---
> > > >  drivers/gpu/drm/i915/intel_csr.c        | 7 +++++++
> > > >  drivers/gpu/drm/i915/intel_runtime_pm.c | 3 +++
> > > >  2 files changed, 10 insertions(+)
> > > > 
> > > > diff --git a/drivers/gpu/drm/i915/intel_csr.c b/drivers/gpu/drm/i915/intel_csr.c
> > > > index 1ec4f09c61f6..6d9d47322405 100644
> > > > --- a/drivers/gpu/drm/i915/intel_csr.c
> > > > +++ b/drivers/gpu/drm/i915/intel_csr.c
> > > > @@ -34,6 +34,9 @@
> > > >   * low-power state and comes back to normal.
> > > >   */
> > > >  
> > > > +#define I915_CSR_ICL "i915/icl_dmc_ver1_07.bin"
> > > > +#define ICL_CSR_VERSION_REQUIRED   CSR_VERSION(1, 7)
> > > > +
> > > >  #define I915_CSR_GLK "i915/glk_dmc_ver1_04.bin"
> > > >  MODULE_FIRMWARE(I915_CSR_GLK);
> > > >  #define GLK_CSR_VERSION_REQUIRED   CSR_VERSION(1, 4)
> > > > @@ -301,6 +304,8 @@ static uint32_t *parse_csr_fw(struct drm_i915_private *dev_priv,
> > > >     if (csr->fw_path == i915_modparams.dmc_firmware_path) {
> > > >             /* Bypass version check for firmware override. */
> > > >             required_version = csr->version;
> > > > +   } else if (IS_ICELAKE(dev_priv)) {
> > > > +           required_version = ICL_CSR_VERSION_REQUIRED;
> > > >     } else if (IS_CANNONLAKE(dev_priv)) {
> > > >             required_version = CNL_CSR_VERSION_REQUIRED;
> > > >     } else if (IS_GEMINILAKE(dev_priv)) {
> > > > @@ -458,6 +463,8 @@ void intel_csr_ucode_init(struct drm_i915_private *dev_priv)
> > > >  
> > > >     if (i915_modparams.dmc_firmware_path)
> > > >             csr->fw_path = i915_modparams.dmc_firmware_path;
> > > > +   else if (IS_ICELAKE(dev_priv))
> > > > +           csr->fw_path = I915_CSR_ICL;
> > > >     else if (IS_CANNONLAKE(dev_priv))
> > > >             csr->fw_path = I915_CSR_CNL;
> > > >     else if (IS_GEMINILAKE(dev_priv))
> > > > diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
> > > > index 2852395125cd..bd7da068e813 100644
> > > > --- a/drivers/gpu/drm/i915/intel_runtime_pm.c
> > > > +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
> > > > @@ -3563,6 +3563,9 @@ static void icl_display_core_init(struct drm_i915_private *dev_priv,
> > > >  
> > > >     /* 7. Setup MBUS. */
> > > >     icl_mbus_init(dev_priv);
> > > > +
> > > > +   if (resume && dev_priv->csr.dmc_payload)
> > > > +           intel_csr_load_program(dev_priv);
> > > >  }
> > > >  
> > > >  static void icl_display_core_uninit(struct drm_i915_private *dev_priv)
> > > > -- 
> > > > 2.17.1
> > > > 
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