On Tue, 12 May 2015, Ville Syrjälä <ville.syrj...@linux.intel.com> wrote:
> On Tue, May 12, 2015 at 05:20:38PM +0300, Jani Nikula wrote:
>> Nuke three copies of the same switch case.
>> 
>> Hopefully we can switch to a drm generic function later on, but that
>> will require us to swich to enum mipi_dsi_pixel_format first.
>> 
>> Signed-off-by: Jani Nikula <jani.nik...@intel.com>
>> ---
>>  drivers/gpu/drm/i915/intel_dsi_pll.c | 67 
>> +++++++++++++-----------------------
>>  1 file changed, 24 insertions(+), 43 deletions(-)
>> 
>> diff --git a/drivers/gpu/drm/i915/intel_dsi_pll.c 
>> b/drivers/gpu/drm/i915/intel_dsi_pll.c
>> index cfd527765156..9ada06ec88e5 100644
>> --- a/drivers/gpu/drm/i915/intel_dsi_pll.c
>> +++ b/drivers/gpu/drm/i915/intel_dsi_pll.c
>> @@ -38,6 +38,27 @@
>>  #define DSI_HFP_PACKET_EXTRA_SIZE   6
>>  #define DSI_EOTP_PACKET_SIZE                4
>>  
>> +static int dsi_pixel_format_bpp(int pixel_format)
>> +{
>> +    int bpp;
>> +
>> +    switch (pixel_format) {
>> +    default:
>> +    case VID_MODE_FORMAT_RGB888:
>> +    case VID_MODE_FORMAT_RGB666_LOOSE:
>> +            bpp = 24;
>> +            break;
>> +    case VID_MODE_FORMAT_RGB666:
>> +            bpp = 18;
>> +            break;
>> +    case VID_MODE_FORMAT_RGB565:
>> +            bpp = 16;
>> +            break;
>> +    }
>> +
>> +    return bpp;
>> +}
>
> Optional bikeshed: Could return directly from the switch cases and avoid
> the local variable.

The compiler appears to automatically inline the function (*and* two
functions it is called from), so does not make a difference.

Thanks for the review.

BR,
Jani.

>
> But anyway:
> Reviewed-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
>
>> +
>>  struct dsi_mnp {
>>      u32 dsi_pll_ctrl;
>>      u32 dsi_pll_div;
>> @@ -65,19 +86,7 @@ static u32 dsi_rr_formula(const struct drm_display_mode 
>> *mode,
>>      u32 dsi_bit_clock_hz;
>>      u32 dsi_clk;
>>  
>> -    switch (pixel_format) {
>> -    default:
>> -    case VID_MODE_FORMAT_RGB888:
>> -    case VID_MODE_FORMAT_RGB666_LOOSE:
>> -            bpp = 24;
>> -            break;
>> -    case VID_MODE_FORMAT_RGB666:
>> -            bpp = 18;
>> -            break;
>> -    case VID_MODE_FORMAT_RGB565:
>> -            bpp = 16;
>> -            break;
>> -    }
>> +    bpp = dsi_pixel_format_bpp(pixel_format);
>>  
>>      hactive = mode->hdisplay;
>>      vactive = mode->vdisplay;
>> @@ -137,21 +146,7 @@ static u32 dsi_rr_formula(const struct drm_display_mode 
>> *mode,
>>  static u32 dsi_clk_from_pclk(u32 pclk, int pixel_format, int lane_count)
>>  {
>>      u32 dsi_clk_khz;
>> -    u32 bpp;
>> -
>> -    switch (pixel_format) {
>> -    default:
>> -    case VID_MODE_FORMAT_RGB888:
>> -    case VID_MODE_FORMAT_RGB666_LOOSE:
>> -            bpp = 24;
>> -            break;
>> -    case VID_MODE_FORMAT_RGB666:
>> -            bpp = 18;
>> -            break;
>> -    case VID_MODE_FORMAT_RGB565:
>> -            bpp = 16;
>> -            break;
>> -    }
>> +    u32 bpp = dsi_pixel_format_bpp(pixel_format);
>>  
>>      /* DSI data rate = pixel clock * bits per pixel / lane count
>>         pixel clock is converted from KHz to Hz */
>> @@ -285,21 +280,7 @@ void vlv_disable_dsi_pll(struct intel_encoder *encoder)
>>  
>>  static void assert_bpp_mismatch(int pixel_format, int pipe_bpp)
>>  {
>> -    int bpp;
>> -
>> -    switch (pixel_format) {
>> -    default:
>> -    case VID_MODE_FORMAT_RGB888:
>> -    case VID_MODE_FORMAT_RGB666_LOOSE:
>> -            bpp = 24;
>> -            break;
>> -    case VID_MODE_FORMAT_RGB666:
>> -            bpp = 18;
>> -            break;
>> -    case VID_MODE_FORMAT_RGB565:
>> -            bpp = 16;
>> -            break;
>> -    }
>> +    int bpp = dsi_pixel_format_bpp(pixel_format);
>>  
>>      WARN(bpp != pipe_bpp,
>>           "bpp match assertion failure (expected %d, current %d)\n",
>> -- 
>> 2.1.4
>
> -- 
> Ville Syrjälä
> Intel OTC

-- 
Jani Nikula, Intel Open Source Technology Center
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