drm/i915/bxt: eDP low vswing support (d9d7000d) · Commits · 戴 / test

drivers/gpu/drm/i915/intel_ddi.c

+19 −4

Original line number	Diff line number	Diff line
		@@ -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, 0x9A, 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.
		*/
		@@ -2112,7 +2123,11 @@ 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) {

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