From: Bich Hemon bich.hemon@st.com
Modify AWG algorithm in order to handle more than 1023 lines
Signed-off-by: Bich Hemon bich.hemon@st.com --- drivers/gpu/drm/sti/sti_awg_utils.c | 51 +++++++++++++++++++++++++------------ 1 file changed, 35 insertions(+), 16 deletions(-)
diff --git a/drivers/gpu/drm/sti/sti_awg_utils.c b/drivers/gpu/drm/sti/sti_awg_utils.c index 2378b93..a516eb8 100644 --- a/drivers/gpu/drm/sti/sti_awg_utils.c +++ b/drivers/gpu/drm/sti/sti_awg_utils.c @@ -7,6 +7,7 @@ #include "sti_awg_utils.h"
#define AWG_OPCODE_OFFSET 10 +#define AWG_MAX_ARG 0x3ff
enum opcode { SET, @@ -67,7 +68,7 @@ static int awg_generate_instr(enum opcode opcode,
mux = 0; data_enable = 0; - arg &= (0x3ff); + arg &= AWG_MAX_ARG; break; case REPEAT: case REPLAY: @@ -78,13 +79,13 @@ static int awg_generate_instr(enum opcode opcode,
mux = 0; data_enable = 0; - arg &= (0x3ff); + arg &= AWG_MAX_ARG; break; case JUMP: mux = 0; data_enable = 0; arg |= 0x40; /* for jump instruction 7th bit is 1 */ - arg &= 0x3ff; + arg &= AWG_MAX_ARG; break; case STOP: arg = 0; @@ -112,22 +113,13 @@ static int awg_generate_instr(enum opcode opcode, return 0; }
-int sti_awg_generate_code_data_enable_mode( +static int awg_generate_line_signal( struct awg_code_generation_params *fwparams, struct awg_timing *timing) { long int val; int ret = 0;
- if (timing->trailing_lines > 0) { - /* skip trailing lines */ - val = timing->blanking_level; - ret |= awg_generate_instr(RPLSET, val, 0, 0, fwparams); - - val = timing->trailing_lines - 1; - ret |= awg_generate_instr(REPLAY, val, 0, 0, fwparams); - } - if (timing->trailing_pixels > 0) { /* skip trailing pixel */ val = timing->blanking_level; @@ -152,9 +144,36 @@ int sti_awg_generate_code_data_enable_mode( ret |= awg_generate_instr(SET, val, 0, 0, fwparams); }
- /* replay the sequence as many active lines defined */ - val = timing->active_lines - 1; - ret |= awg_generate_instr(REPLAY, val, 0, 0, fwparams); + return ret; +} + +int sti_awg_generate_code_data_enable_mode( + struct awg_code_generation_params *fwparams, + struct awg_timing *timing) +{ + long int val, tmp_val; + int ret = 0; + + if (timing->trailing_lines > 0) { + /* skip trailing lines */ + val = timing->blanking_level; + ret |= awg_generate_instr(RPLSET, val, 0, 0, fwparams); + + val = timing->trailing_lines - 1; + ret |= awg_generate_instr(REPLAY, val, 0, 0, fwparams); + } + + tmp_val = timing->active_lines - 1; + + while (tmp_val > 0) { + /* generate DE signal for each line */ + ret |= awg_generate_line_signal(fwparams, timing); + /* replay the sequence as many active lines defined */ + ret |= awg_generate_instr(REPLAY, + min_t(int, AWG_MAX_ARG, tmp_val), + 0, 0, fwparams); + tmp_val -= AWG_MAX_ARG; + }
if (timing->blanking_lines > 0) { /* skip blanking lines */