diff options
| -rw-r--r-- | drivers/gpu/drm/i915/display/vlv_dsi.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/vlv_dsi.c b/drivers/gpu/drm/i915/display/vlv_dsi.c index a96e7d028c5c..0d3aabf6a1dd 100644 --- a/drivers/gpu/drm/i915/display/vlv_dsi.c +++ b/drivers/gpu/drm/i915/display/vlv_dsi.c @@ -23,6 +23,7 @@ * Author: Jani Nikula <[email protected]> */ +#include <linux/dmi.h> #include <linux/slab.h> #include <drm/drm_atomic_helper.h> @@ -1744,6 +1745,40 @@ static void vlv_dphy_param_init(struct intel_dsi *intel_dsi) intel_dsi_log_params(intel_dsi); } +typedef void (*vlv_dsi_dmi_quirk_func)(struct intel_dsi *intel_dsi); + +/* + * Vtotal is wrong on the Asus TF103C leading to the last line of the display + * being shown as the first line. The factory installed Android has a hardcoded + * modeline, causing it to not suffer from this BIOS bug. + * + * Original mode: "1280x800": 60 67700 1280 1312 1328 1376 800 808 812 820 0x8 0xa + * Fixed mode: "1280x800": 60 67700 1280 1312 1328 1376 800 808 812 816 0x8 0xa + * + * https://gitlab.freedesktop.org/drm/intel/-/issues/9381 + */ +static void vlv_dsi_asus_tf103c_mode_fixup(struct intel_dsi *intel_dsi) +{ + /* Cast away the const as we want to fixup the mode */ + struct drm_display_mode *fixed_mode = (struct drm_display_mode *) + intel_panel_preferred_fixed_mode(intel_dsi->attached_connector); + + if (fixed_mode->vtotal == 820) + fixed_mode->vtotal -= 4; +} + +static const struct dmi_system_id vlv_dsi_dmi_quirk_table[] = { + { + /* Asus Transformer Pad TF103C */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), + DMI_MATCH(DMI_PRODUCT_NAME, "TF103C"), + }, + .driver_data = (void *)vlv_dsi_asus_tf103c_mode_fixup, + }, + { } +}; + void vlv_dsi_init(struct drm_i915_private *dev_priv) { struct intel_dsi *intel_dsi; @@ -1752,6 +1787,7 @@ void vlv_dsi_init(struct drm_i915_private *dev_priv) struct intel_connector *intel_connector; struct drm_connector *connector; struct drm_display_mode *current_mode; + const struct dmi_system_id *dmi_id; enum port port; enum pipe pipe; @@ -1883,6 +1919,14 @@ void vlv_dsi_init(struct drm_i915_private *dev_priv) goto err_cleanup_connector; } + dmi_id = dmi_first_match(vlv_dsi_dmi_quirk_table); + if (dmi_id) { + vlv_dsi_dmi_quirk_func quirk_func = + (vlv_dsi_dmi_quirk_func)dmi_id->driver_data; + + quirk_func(intel_dsi); + } + intel_panel_init(intel_connector, NULL); intel_backlight_setup(intel_connector, INVALID_PIPE); |