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| author | Hans de Goede <hdegoede@redhat.com> | 2019-05-24 20:40:27 +0300 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2019-06-12 10:41:55 +0300 |
| commit | f9a99131ce18d9dddcaa14ec2c436e42f0bbee5e (patch) | |
| tree | 9cc5d43afa06f008a2026e11a90da58c7d6be26f /drivers/fpga/xilinx-spi.c | |
| parent | d1fdb6d8f6a4109a4263176c84b899076a5f8008 (diff) | |
| download | linux-f9a99131ce18d9dddcaa14ec2c436e42f0bbee5e.tar.xz | |
drm/i915/dsi: Use a fuzzy check for burst mode clock check
Prior to this commit we fail to init the DSI panel on the GPD MicroPC:
https://www.indiegogo.com/projects/gpd-micropc-6-inch-handheld-industry-laptop#/
The problem is intel_dsi_vbt_init() failing with the following error:
*ERROR* Burst mode freq is less than computed
The pclk in the VBT panel modeline is 70000, together with 24 bpp and
4 lines this results in a bitrate value of 70000 * 24 / 4 = 420000.
But the target_burst_mode_freq in the VBT is 418000.
This commit works around this problem by adding an intel_fuzzy_clock_check
when target_burst_mode_freq < bitrate and setting target_burst_mode_freq to
bitrate when that checks succeeds, fixing the panel not working.
Cc: stable@vger.kernel.org
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190524174028.21659-2-hdegoede@redhat.com
(cherry picked from commit 2c1c55252647abd989b94f725b190c700312d053)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'drivers/fpga/xilinx-spi.c')
0 files changed, 0 insertions, 0 deletions