[v9,1/6] drm/panic: Move drawing functions to drm_draw

[Jocelyn Falempe]

On 11/12/2024 22:34, Kees Bakker wrote:
> Op 04-12-2024 om 16:45 schreef Jocelyn Falempe:
>> Move the color conversions, blit and fill functions to drm_draw.c,
>> so that they can be re-used by drm_log.
>> drm_draw is internal to the drm subsystem, and shouldn't be used by
>> gpu drivers.
>>
>> Signed-off-by: Jocelyn Falempe <jfalempe at redhat.com>
>> Reviewed-by: Thomas Zimmermann <tzimmermann at suse.de>
>> ---
>>
>> v5:
>>   * Export drm_draw symbols, so they can be used if drm_client_lib is 
>> built as module.
>>
>> v6:
>>   * rebase and solve conflict with "drm/panic: Add ABGR2101010 support"
>>
>> v9:
>>   * Rename drm_draw.h to drm_draw_internal.h (Jani Nikula)
>>
>>   drivers/gpu/drm/Kconfig             |   5 +
>>   drivers/gpu/drm/Makefile            |   1 +
>>   drivers/gpu/drm/drm_draw.c          | 233 +++++++++++++++++++++++++
>>   drivers/gpu/drm/drm_draw_internal.h |  56 ++++++
>>   drivers/gpu/drm/drm_panic.c         | 257 +++-------------------------
>>   5 files changed, 318 insertions(+), 234 deletions(-)
>>   create mode 100644 drivers/gpu/drm/drm_draw.c
>>   create mode 100644 drivers/gpu/drm/drm_draw_internal.h
>>
>> [...]
>> diff --git a/drivers/gpu/drm/drm_draw.c b/drivers/gpu/drm/drm_draw.c
>> new file mode 100644
>> index 000000000000..cb2ad12bce57
>> --- /dev/null
>> +++ b/drivers/gpu/drm/drm_draw.c
>> @@ -0,0 +1,233 @@
>> +[...]
>> +void drm_draw_fill24(struct iosys_map *dmap, unsigned int dpitch,
>> +             unsigned int height, unsigned int width,
>> +             u16 color)
>> +{
>> +    unsigned int y, x;
>> +
>> +    for (y = 0; y < height; y++) {
>> +        for (x = 0; x < width; x++) {
>> +            unsigned int off = y * dpitch + x * 3;
>> +
>> +            /* write blue-green-red to output in little endianness */
>> +            iosys_map_wr(dmap, off, u8, (color & 0x000000FF) >> 0);
>> +            iosys_map_wr(dmap, off + 1, u8, (color & 0x0000FF00) >> 8);
>> +            iosys_map_wr(dmap, off + 2, u8, (color & 0x00FF0000) >> 16);
>> +        }
>> +    }
>> +}
>>
> u16 is not wide enough for a 24bit color

Good catch, I will send a fix when I get some time.

Best regards,

-- 

Jocelyn