From: Bich Hemon <bich.he...@st.com>
Modify AWG algorithm in order to handle more than 1023 lines
Signed-off-by: Bich Hemon <bich.hemon at 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 */
--
1.9.1
