Hello,
according to drivers/gpu/drm/stm/ltdc.c stm hardware supports these pixel formats:
enum ltdc_pix_fmt {
PF_NONE,
/* RGB formats */
PF_ARGB8888, /* ARGB [32 bits] */
PF_RGBA8888, /* RGBA [32 bits] */
PF_RGB888, /* RGB [24 bits] */
PF_RGB565, /* RGB [16 bits] */
PF_ARGB1555, /* ARGB A:1 bit RGB:15 bits [16 bits] */
PF_ARGB4444, /* ARGB A:4 bits R/G/B: 4 bits each [16 bits] */
/* Indexed formats */
PF_L8, /* Indexed 8 bits [8 bits] */
PF_AL44, /* Alpha:4 bits + indexed 4 bits [8 bits] */
PF_AL88 /* Alpha:8 bits + indexed 8 bits [16 bits] */
};
which corresponds to list of pixel format that I get from modetest -M stm | grep format:
formats: AR24 XR24 RG24 RG16 AR15 XR15 AR12 XR12 C8
My question is : does STM hardware support RGB666 pixel format ? If yes, how should I patch stm driver to handle this pixel format ?
