[Intel-gfx] [PATCH 08/37] drm/i915: make intel_{uncore, de}_rmw() more useful
Lucas De Marchi
lucas.demarchi at intel.com
Thu May 21 17:30:58 UTC 2020
On Thu, May 21, 2020 at 10:24:49AM -0700, Jose Souza wrote:
>On Wed, 2020-05-20 at 17:37 -0700, Lucas De Marchi wrote:
>> Return the old value read so some places of the code can still do the
>> rmw but add warnings/errors about the value it read.
>>
>> Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
>> ---
>> drivers/gpu/drm/i915/display/intel_de.h | 4 ++--
>> drivers/gpu/drm/i915/intel_uncore.h | 10 +++++++---
>> 2 files changed, 9 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/display/intel_de.h b/drivers/gpu/drm/i915/display/intel_de.h
>> index 00da10bf35f5..d5441b1ba2fe 100644
>> --- a/drivers/gpu/drm/i915/display/intel_de.h
>> +++ b/drivers/gpu/drm/i915/display/intel_de.h
>> @@ -42,10 +42,10 @@ intel_de_write_fw(struct drm_i915_private *i915, i915_reg_t reg, u32 val)
>> intel_uncore_write_fw(&i915->uncore, reg, val);
>> }
>>
>
>Maybe add function documentation with this new information about the return?
yeah... just not sure about the usefulness since the only place I
intended to use it I ended up doing something different. So I'm still
not sure. Maybe wait a user to appear.
thanks
Lucas De Marchi
>
>With that:
>
>Reviewed-by: José Roberto de Souza <jose.souza at intel.com>
>
>>
>> -static inline void
>> +static inline u32
>> intel_de_rmw(struct drm_i915_private *i915, i915_reg_t reg, u32 clear, u32 set)
>> {
>> - intel_uncore_rmw(&i915->uncore, reg, clear, set);
>> + return intel_uncore_rmw(&i915->uncore, reg, clear, set);
>> }
>>
>> static inline int
>> diff --git a/drivers/gpu/drm/i915/intel_uncore.h b/drivers/gpu/drm/i915/intel_uncore.h
>> index 8d3aa8b9acf9..5da43b56fa11 100644
>> --- a/drivers/gpu/drm/i915/intel_uncore.h
>> +++ b/drivers/gpu/drm/i915/intel_uncore.h
>> @@ -379,8 +379,8 @@ intel_uncore_read64_2x32(struct intel_uncore *uncore,
>> #define intel_uncore_write64_fw(...) __raw_uncore_write64(__VA_ARGS__)
>> #define intel_uncore_posting_read_fw(...) ((void)intel_uncore_read_fw(__VA_ARGS__))
>>
>> -static inline void intel_uncore_rmw(struct intel_uncore *uncore,
>> - i915_reg_t reg, u32 clear, u32 set)
>> +static inline u32 intel_uncore_rmw(struct intel_uncore *uncore,
>> + i915_reg_t reg, u32 clear, u32 set)
>> {
>> u32 old, val;
>>
>> @@ -388,9 +388,11 @@ static inline void intel_uncore_rmw(struct intel_uncore *uncore,
>> val = (old & ~clear) | set;
>> if (val != old)
>> intel_uncore_write(uncore, reg, val);
>> +
>> + return old;
>> }
>>
>> -static inline void intel_uncore_rmw_fw(struct intel_uncore *uncore,
>> +static inline u32 intel_uncore_rmw_fw(struct intel_uncore *uncore,
>> i915_reg_t reg, u32 clear, u32 set)
>> {
>> u32 old, val;
>> @@ -399,6 +401,8 @@ static inline void intel_uncore_rmw_fw(struct intel_uncore *uncore,
>> val = (old & ~clear) | set;
>> if (val != old)
>> intel_uncore_write_fw(uncore, reg, val);
>> +
>> + return old;
>> }
>>
>> static inline int intel_uncore_write_and_verify(struct intel_uncore *uncore,
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