Adding voltage swing table for edp to support low vswings.
Signed-off-by: Sonika Jindal <sonika.jin...@intel.com>
---
drivers/gpu/drm/i915/intel_ddi.c | 23 +++++++++++++++++++----
1 file changed, 19 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 0d9b304..17281bc 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -256,9 +256,6 @@ struct bxt_ddi_buf_trans {
bool default_index; /* true if the entry represents default value */
};
-/* BSpec does not define separate vswing/pre-emphasis values for eDP.
- * Using DP values for eDP as well.
- */
static const struct bxt_ddi_buf_trans bxt_ddi_translations_dp[] = {
/* Idx NT mV diff db */
{ 52, 0, 0, 128, true }, /* 0: 400 0 */
@@ -273,6 +270,20 @@ static const struct bxt_ddi_buf_trans
bxt_ddi_translations_dp[] = {
{ 154, 0x9A, 1, 128, false }, /* 9: 1200 0 */
};
+static const struct bxt_ddi_buf_trans bxt_ddi_translations_edp[] = {
+ /* Idx NT mV diff db */
+ { 26, 0, 0, 128, false }, /* 0: 200 0 */
+ { 38, 0, 0, 112, false }, /* 1: 200 1.5 */
+ { 48, 0, 0, 96, false }, /* 2: 200 4 */
+ { 54, 0, 0, 69, false }, /* 3: 200 6 */
+ { 32, 0, 0, 128, false }, /* 4: 250 0 */
+ { 48, 0, 0, 104, false }, /* 5: 250 1.5 */
+ { 54, 0, 0, 85, false }, /* 6: 250 4 */
+ { 43, 0, 0, 128, false }, /* 7: 300 0 */
+ { 54, 0, 0, 101, false }, /* 8: 300 1.5 */
+ { 48, 0, 0, 128, false }, /* 9: 300 0 */
+};
+
/* BSpec has 2 recommended values - entries 0 and 8.
* Using the entry with higher vswing.
*/
@@ -2113,7 +2124,11 @@ static void bxt_ddi_vswing_sequence(struct drm_device
*dev, u32 level,
u32 n_entries, i;
uint32_t val;
- if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP) {
+ if (type == INTEL_OUTPUT_EDP && dev_priv->edp_low_vswing) {
+ n_entries = ARRAY_SIZE(bxt_ddi_translations_edp);
+ ddi_translations = bxt_ddi_translations_edp;
+ } else if (type == INTEL_OUTPUT_DISPLAYPORT
+ || type == INTEL_OUTPUT_EDP) {
n_entries = ARRAY_SIZE(bxt_ddi_translations_dp);
ddi_translations = bxt_ddi_translations_dp;
} else if (type == INTEL_OUTPUT_HDMI) {
--
1.7.10.4
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