[PATCH] drm/amd/display: Constify struct timing_generator_funcs

[Christophe JAILLET]

'struct timing_generator_funcs' are not modified in these drivers.

Constifying these structures moves some data to a read-only section, so
increases overall security, especially when the structure holds some
function pointers.

Signed-off-by: Christophe JAILLET <christophe.jaillet at wanadoo.fr>
---
This is NOT compile tested, because apparently some .h files are missing on
my system ("reg_helper.h")

However, I've checked how these struct timing_generator_funcs are used.
They end in "struct optc->base.funcs" which is a
"const struct timing_generator_funcs", so evething should be fine.
---
 drivers/gpu/drm/amd/display/dc/optc/dcn20/dcn20_optc.c   | 2 +-
 drivers/gpu/drm/amd/display/dc/optc/dcn201/dcn201_optc.c | 2 +-
 drivers/gpu/drm/amd/display/dc/optc/dcn30/dcn30_optc.c   | 2 +-
 drivers/gpu/drm/amd/display/dc/optc/dcn301/dcn301_optc.c | 2 +-
 drivers/gpu/drm/amd/display/dc/optc/dcn31/dcn31_optc.c   | 2 +-
 drivers/gpu/drm/amd/display/dc/optc/dcn314/dcn314_optc.c | 2 +-
 drivers/gpu/drm/amd/display/dc/optc/dcn32/dcn32_optc.c   | 2 +-
 drivers/gpu/drm/amd/display/dc/optc/dcn35/dcn35_optc.c   | 2 +-
 drivers/gpu/drm/amd/display/dc/optc/dcn401/dcn401_optc.c | 2 +-
 9 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/optc/dcn20/dcn20_optc.c b/drivers/gpu/drm/amd/display/dc/optc/dcn20/dcn20_optc.c
index 81857ce6d68d..e7a90a437fff 100644
--- a/drivers/gpu/drm/amd/display/dc/optc/dcn20/dcn20_optc.c
+++ b/drivers/gpu/drm/amd/display/dc/optc/dcn20/dcn20_optc.c
@@ -502,7 +502,7 @@ void optc2_get_last_used_drr_vtotal(struct timing_generator *optc, uint32_t *ref
 	REG_GET(OTG_DRR_CONTROL, OTG_V_TOTAL_LAST_USED_BY_DRR, refresh_rate);
 }
 
-static struct timing_generator_funcs dcn20_tg_funcs = {
+static const struct timing_generator_funcs dcn20_tg_funcs = {
 		.validate_timing = optc1_validate_timing,
 		.program_timing = optc1_program_timing,
 		.setup_vertical_interrupt0 = optc1_setup_vertical_interrupt0,
diff --git a/drivers/gpu/drm/amd/display/dc/optc/dcn201/dcn201_optc.c b/drivers/gpu/drm/amd/display/dc/optc/dcn201/dcn201_optc.c
index f2415eebdc09..772a8bfb949c 100644
--- a/drivers/gpu/drm/amd/display/dc/optc/dcn201/dcn201_optc.c
+++ b/drivers/gpu/drm/amd/display/dc/optc/dcn201/dcn201_optc.c
@@ -129,7 +129,7 @@ static void optc201_get_optc_source(struct timing_generator *optc,
 	*num_of_src_opp = 1;
 }
 
-static struct timing_generator_funcs dcn201_tg_funcs = {
+static const struct timing_generator_funcs dcn201_tg_funcs = {
 		.validate_timing = optc201_validate_timing,
 		.program_timing = optc1_program_timing,
 		.setup_vertical_interrupt0 = optc1_setup_vertical_interrupt0,
diff --git a/drivers/gpu/drm/amd/display/dc/optc/dcn30/dcn30_optc.c b/drivers/gpu/drm/amd/display/dc/optc/dcn30/dcn30_optc.c
index 78b58a449fa4..ee4665aa49e9 100644
--- a/drivers/gpu/drm/amd/display/dc/optc/dcn30/dcn30_optc.c
+++ b/drivers/gpu/drm/amd/display/dc/optc/dcn30/dcn30_optc.c
@@ -357,7 +357,7 @@ void optc3_tg_init(struct timing_generator *optc)
 	optc1_clear_optc_underflow(optc);
 }
 
-static struct timing_generator_funcs dcn30_tg_funcs = {
+static const struct timing_generator_funcs dcn30_tg_funcs = {
 		.validate_timing = optc1_validate_timing,
 		.program_timing = optc1_program_timing,
 		.setup_vertical_interrupt0 = optc1_setup_vertical_interrupt0,
diff --git a/drivers/gpu/drm/amd/display/dc/optc/dcn301/dcn301_optc.c b/drivers/gpu/drm/amd/display/dc/optc/dcn301/dcn301_optc.c
index 65e9089b7f31..38f85bc2681a 100644
--- a/drivers/gpu/drm/amd/display/dc/optc/dcn301/dcn301_optc.c
+++ b/drivers/gpu/drm/amd/display/dc/optc/dcn301/dcn301_optc.c
@@ -109,7 +109,7 @@ void optc301_setup_manual_trigger(struct timing_generator *optc)
 			OTG_TRIGA_CLEAR, 1);
 }
 
-static struct timing_generator_funcs dcn30_tg_funcs = {
+static const struct timing_generator_funcs dcn30_tg_funcs = {
 		.validate_timing = optc1_validate_timing,
 		.program_timing = optc1_program_timing,
 		.setup_vertical_interrupt0 = optc1_setup_vertical_interrupt0,
diff --git a/drivers/gpu/drm/amd/display/dc/optc/dcn31/dcn31_optc.c b/drivers/gpu/drm/amd/display/dc/optc/dcn31/dcn31_optc.c
index ef536f37b4ed..4f1830ba619f 100644
--- a/drivers/gpu/drm/amd/display/dc/optc/dcn31/dcn31_optc.c
+++ b/drivers/gpu/drm/amd/display/dc/optc/dcn31/dcn31_optc.c
@@ -315,7 +315,7 @@ void optc31_read_otg_state(struct timing_generator *optc,
 	s->otg_double_buffer_control = REG_READ(OTG_DOUBLE_BUFFER_CONTROL);
 }
 
-static struct timing_generator_funcs dcn31_tg_funcs = {
+static const struct timing_generator_funcs dcn31_tg_funcs = {
 		.validate_timing = optc1_validate_timing,
 		.program_timing = optc1_program_timing,
 		.setup_vertical_interrupt0 = optc1_setup_vertical_interrupt0,
diff --git a/drivers/gpu/drm/amd/display/dc/optc/dcn314/dcn314_optc.c b/drivers/gpu/drm/amd/display/dc/optc/dcn314/dcn314_optc.c
index 0e603bad0d12..4a2caca37255 100644
--- a/drivers/gpu/drm/amd/display/dc/optc/dcn314/dcn314_optc.c
+++ b/drivers/gpu/drm/amd/display/dc/optc/dcn314/dcn314_optc.c
@@ -192,7 +192,7 @@ static void optc314_set_h_timing_div_manual_mode(struct timing_generator *optc,
 }
 
 
-static struct timing_generator_funcs dcn314_tg_funcs = {
+static const struct timing_generator_funcs dcn314_tg_funcs = {
 		.validate_timing = optc1_validate_timing,
 		.program_timing = optc1_program_timing,
 		.setup_vertical_interrupt0 = optc1_setup_vertical_interrupt0,
diff --git a/drivers/gpu/drm/amd/display/dc/optc/dcn32/dcn32_optc.c b/drivers/gpu/drm/amd/display/dc/optc/dcn32/dcn32_optc.c
index 2cdd19ba634b..b2b226bcd871 100644
--- a/drivers/gpu/drm/amd/display/dc/optc/dcn32/dcn32_optc.c
+++ b/drivers/gpu/drm/amd/display/dc/optc/dcn32/dcn32_optc.c
@@ -297,7 +297,7 @@ static void optc32_set_drr(
 	optc32_setup_manual_trigger(optc);
 }
 
-static struct timing_generator_funcs dcn32_tg_funcs = {
+static const struct timing_generator_funcs dcn32_tg_funcs = {
 		.validate_timing = optc1_validate_timing,
 		.program_timing = optc1_program_timing,
 		.setup_vertical_interrupt0 = optc1_setup_vertical_interrupt0,
diff --git a/drivers/gpu/drm/amd/display/dc/optc/dcn35/dcn35_optc.c b/drivers/gpu/drm/amd/display/dc/optc/dcn35/dcn35_optc.c
index 4cfc6c0fa147..72bff94cb57d 100644
--- a/drivers/gpu/drm/amd/display/dc/optc/dcn35/dcn35_optc.c
+++ b/drivers/gpu/drm/amd/display/dc/optc/dcn35/dcn35_optc.c
@@ -428,7 +428,7 @@ static void optc35_set_long_vtotal(
 	}
 }
 
-static struct timing_generator_funcs dcn35_tg_funcs = {
+static const struct timing_generator_funcs dcn35_tg_funcs = {
 		.validate_timing = optc1_validate_timing,
 		.program_timing = optc1_program_timing,
 		.setup_vertical_interrupt0 = optc1_setup_vertical_interrupt0,
diff --git a/drivers/gpu/drm/amd/display/dc/optc/dcn401/dcn401_optc.c b/drivers/gpu/drm/amd/display/dc/optc/dcn401/dcn401_optc.c
index 382ac18e7854..ff79c38287df 100644
--- a/drivers/gpu/drm/amd/display/dc/optc/dcn401/dcn401_optc.c
+++ b/drivers/gpu/drm/amd/display/dc/optc/dcn401/dcn401_optc.c
@@ -459,7 +459,7 @@ bool optc401_wait_update_lock_status(struct timing_generator *tg, bool locked)
 	return true;
 }
 
-static struct timing_generator_funcs dcn401_tg_funcs = {
+static const struct timing_generator_funcs dcn401_tg_funcs = {
 		.validate_timing = optc1_validate_timing,
 		.program_timing = optc1_program_timing,
 		.setup_vertical_interrupt0 = optc1_setup_vertical_interrupt0,
-- 
2.49.0