nyan*: Set SOR_NV_PDISP_SOR_DP_SPARE0 register
This register needs to be set properly during display init. BRANCH=none BUG=chrome-os-partner:27413 TEST=build nyan and nyan_big. nyan display works fine. nyan_big display works as well. However, the mode setting needs to be based on either devicetree or EDID. Original-Signed-off-by: Jimmy Zhang <jimmzhang@nvidia.com> Original-Change-Id: I93c69d8042a3f3c19f4e24801423b73246e37031 Original-Reviewed-on: https://chromium-review.googlesource.com/194739 Original-Reviewed-by: Hung-Te Lin <hungte@chromium.org> Original-Commit-Queue: Hung-Te Lin <hungte@chromium.org> Original-Tested-by: Hung-Te Lin <hungte@chromium.org> (cherry picked from commit ee9a3c472c5621edebefcc8882582c6fc01255e2) Signed-off-by: Marc Jones <marc.jones@se-eng.com> Change-Id: Ie642a008eaf6c4ab68ede1dde98ff4268f51fc9c Reviewed-on: http://review.coreboot.org/7767 Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Tested-by: build bot (Jenkins)
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@ -618,6 +618,22 @@ static int tegra_dc_dp_init_link_cfg(
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return 0;
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}
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static int tegra_dc_dp_set_assr(struct tegra_dc_dp_data *dp, int ena)
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{
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int ret;
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u8 dpcd_data = ena ?
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NV_DPCD_EDP_CONFIG_SET_ASC_RESET_ENABLE :
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NV_DPCD_EDP_CONFIG_SET_ASC_RESET_DISABLE;
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CHECK_RET(tegra_dc_dp_dpcd_write(dp, NV_DPCD_EDP_CONFIG_SET,
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dpcd_data));
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/* Also reset the scrambler to 0xfffe */
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tegra_dc_sor_set_internal_panel(&dp->sor, ena);
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return 0;
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}
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static void tegra_dp_update_config(struct tegra_dc_dp_data *dp,
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struct soc_nvidia_tegra124_config *config)
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{
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@ -738,6 +754,12 @@ void dp_enable(void * _dp)
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goto error_enable;
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}
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/* enable ASSR */
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if (tegra_dc_dp_set_assr(dp, dp->link_cfg.scramble_ena)) {
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printk(BIOS_ERR, "dp: failed to enable ASSR\n");
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goto error_enable;
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}
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tegra_dc_sor_enable_dp(&dp->sor);
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tegra_dc_sor_set_panel_power(&dp->sor, 1);
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