drm/radeon/kms: rework spread spectrum handling
This patch reworks spread spectrum handling to enable it
properly on lvds and DP/eDP links. It also fixes several
bugs in the old spread spectrum code.
- Use the ss recommended reference divider if available
when calculating the pll
- Use the proper ss command tables on pre-DCE3 asics
- Avoid reading past the end of the ss info tables
- Enable ss on evergreen asics (lvds, dp, tmds)
- Enable ss on DP/eDP links
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h
index 29f5517..d25cf09 100644
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -324,21 +324,24 @@
struct radeon_atom_ss {
uint16_t percentage;
uint8_t type;
- uint8_t step;
+ uint16_t step;
uint8_t delay;
uint8_t range;
uint8_t refdiv;
+ /* asic_ss */
+ uint16_t rate;
+ uint16_t amount;
};
struct radeon_encoder_atom_dig {
bool linkb;
/* atom dig */
bool coherent_mode;
- int dig_encoder; /* -1 disabled, 0 DIGA, 1 DIGB */
- /* atom lvds */
- uint32_t lvds_misc;
+ int dig_encoder; /* -1 disabled, 0 DIGA, 1 DIGB, etc. */
+ /* atom lvds/edp */
+ uint32_t lcd_misc;
uint16_t panel_pwr_delay;
- struct radeon_atom_ss *ss;
+ uint32_t lcd_ss_id;
/* panel mode */
struct drm_display_mode native_mode;
};
@@ -480,6 +483,13 @@
extern struct drm_encoder *radeon_best_encoder(struct drm_connector *connector);
+extern bool radeon_atombios_get_ppll_ss_info(struct radeon_device *rdev,
+ struct radeon_atom_ss *ss,
+ int id);
+extern bool radeon_atombios_get_asic_ss_info(struct radeon_device *rdev,
+ struct radeon_atom_ss *ss,
+ int id, u32 clock);
+
extern void radeon_compute_pll(struct radeon_pll *pll,
uint64_t freq,
uint32_t *dot_clock_p,